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1105 lines
27 KiB
1105 lines
27 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Pinctrl for Cirrus Logic Madera codecs |
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* |
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* Copyright (C) 2016-2018 Cirrus Logic |
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*/ |
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#include <linux/err.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/pinctrl/machine.h> |
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#include <linux/pinctrl/pinctrl.h> |
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#include <linux/pinctrl/pinmux.h> |
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#include <linux/pinctrl/pinconf.h> |
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#include <linux/pinctrl/pinconf-generic.h> |
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#include <linux/mfd/madera/core.h> |
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#include <linux/mfd/madera/registers.h> |
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#include "../pinctrl-utils.h" |
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#include "pinctrl-madera.h" |
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/* |
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* Use pin GPIO names for consistency |
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* NOTE: IDs are zero-indexed for coding convenience |
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*/ |
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static const struct pinctrl_pin_desc madera_pins[] = { |
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PINCTRL_PIN(0, "gpio1"), |
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PINCTRL_PIN(1, "gpio2"), |
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PINCTRL_PIN(2, "gpio3"), |
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PINCTRL_PIN(3, "gpio4"), |
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PINCTRL_PIN(4, "gpio5"), |
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PINCTRL_PIN(5, "gpio6"), |
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PINCTRL_PIN(6, "gpio7"), |
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PINCTRL_PIN(7, "gpio8"), |
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PINCTRL_PIN(8, "gpio9"), |
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PINCTRL_PIN(9, "gpio10"), |
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PINCTRL_PIN(10, "gpio11"), |
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PINCTRL_PIN(11, "gpio12"), |
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PINCTRL_PIN(12, "gpio13"), |
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PINCTRL_PIN(13, "gpio14"), |
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PINCTRL_PIN(14, "gpio15"), |
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PINCTRL_PIN(15, "gpio16"), |
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PINCTRL_PIN(16, "gpio17"), |
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PINCTRL_PIN(17, "gpio18"), |
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PINCTRL_PIN(18, "gpio19"), |
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PINCTRL_PIN(19, "gpio20"), |
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PINCTRL_PIN(20, "gpio21"), |
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PINCTRL_PIN(21, "gpio22"), |
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PINCTRL_PIN(22, "gpio23"), |
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PINCTRL_PIN(23, "gpio24"), |
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PINCTRL_PIN(24, "gpio25"), |
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PINCTRL_PIN(25, "gpio26"), |
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PINCTRL_PIN(26, "gpio27"), |
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PINCTRL_PIN(27, "gpio28"), |
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PINCTRL_PIN(28, "gpio29"), |
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PINCTRL_PIN(29, "gpio30"), |
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PINCTRL_PIN(30, "gpio31"), |
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PINCTRL_PIN(31, "gpio32"), |
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PINCTRL_PIN(32, "gpio33"), |
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PINCTRL_PIN(33, "gpio34"), |
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PINCTRL_PIN(34, "gpio35"), |
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PINCTRL_PIN(35, "gpio36"), |
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PINCTRL_PIN(36, "gpio37"), |
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PINCTRL_PIN(37, "gpio38"), |
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PINCTRL_PIN(38, "gpio39"), |
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PINCTRL_PIN(39, "gpio40"), |
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}; |
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/* |
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* All single-pin functions can be mapped to any GPIO, however pinmux applies |
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* functions to pin groups and only those groups declared as supporting that |
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* function. To make this work we must put each pin in its own dummy group so |
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* that the functions can be described as applying to all pins. |
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* Since these do not correspond to anything in the actual hardware - they are |
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* merely an adaptation to pinctrl's view of the world - we use the same name |
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* as the pin to avoid confusion when comparing with datasheet instructions |
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*/ |
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static const char * const madera_pin_single_group_names[] = { |
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"gpio1", "gpio2", "gpio3", "gpio4", "gpio5", "gpio6", "gpio7", |
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"gpio8", "gpio9", "gpio10", "gpio11", "gpio12", "gpio13", "gpio14", |
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"gpio15", "gpio16", "gpio17", "gpio18", "gpio19", "gpio20", "gpio21", |
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"gpio22", "gpio23", "gpio24", "gpio25", "gpio26", "gpio27", "gpio28", |
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"gpio29", "gpio30", "gpio31", "gpio32", "gpio33", "gpio34", "gpio35", |
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"gpio36", "gpio37", "gpio38", "gpio39", "gpio40", |
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}; |
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/* set of pin numbers for single-pin groups, zero-indexed */ |
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static const unsigned int madera_pin_single_group_pins[] = { |
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0, 1, 2, 3, 4, 5, 6, |
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7, 8, 9, 10, 11, 12, 13, |
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14, 15, 16, 17, 18, 19, 20, |
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21, 22, 23, 24, 25, 26, 27, |
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28, 29, 30, 31, 32, 33, 34, |
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35, 36, 37, 38, 39, |
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}; |
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static const char * const madera_aif1_group_names[] = { "aif1" }; |
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static const char * const madera_aif2_group_names[] = { "aif2" }; |
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static const char * const madera_aif3_group_names[] = { "aif3" }; |
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static const char * const madera_aif4_group_names[] = { "aif4" }; |
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static const char * const madera_mif1_group_names[] = { "mif1" }; |
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static const char * const madera_mif2_group_names[] = { "mif2" }; |
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static const char * const madera_mif3_group_names[] = { "mif3" }; |
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static const char * const madera_dmic3_group_names[] = { "dmic3" }; |
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static const char * const madera_dmic4_group_names[] = { "dmic4" }; |
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static const char * const madera_dmic5_group_names[] = { "dmic5" }; |
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static const char * const madera_dmic6_group_names[] = { "dmic6" }; |
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static const char * const madera_spk1_group_names[] = { "pdmspk1" }; |
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static const char * const madera_spk2_group_names[] = { "pdmspk2" }; |
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/* |
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* alt-functions always apply to a single pin group, other functions always |
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* apply to all pins |
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*/ |
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static const struct { |
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const char *name; |
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const char * const *group_names; |
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u32 func; |
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} madera_mux_funcs[] = { |
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{ |
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.name = "aif1", |
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.group_names = madera_aif1_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "aif2", |
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.group_names = madera_aif2_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "aif3", |
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.group_names = madera_aif3_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "aif4", |
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.group_names = madera_aif4_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "mif1", |
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.group_names = madera_mif1_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "mif2", |
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.group_names = madera_mif2_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "mif3", |
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.group_names = madera_mif3_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "dmic3", |
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.group_names = madera_dmic3_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "dmic4", |
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.group_names = madera_dmic4_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "dmic5", |
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.group_names = madera_dmic5_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "dmic6", |
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.group_names = madera_dmic6_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "pdmspk1", |
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.group_names = madera_spk1_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "pdmspk2", |
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.group_names = madera_spk2_group_names, |
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.func = 0x000 |
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}, |
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{ |
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.name = "io", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x001 |
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}, |
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{ |
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.name = "dsp-gpio", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x002 |
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}, |
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{ |
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.name = "irq1", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x003 |
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}, |
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{ |
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.name = "irq2", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x004 |
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}, |
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{ |
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.name = "fll1-clk", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x010 |
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}, |
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{ |
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.name = "fll2-clk", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x011 |
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}, |
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{ |
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.name = "fll3-clk", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x012 |
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}, |
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{ |
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.name = "fllao-clk", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x013 |
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}, |
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{ |
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.name = "fll1-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x018 |
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}, |
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{ |
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.name = "fll2-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x019 |
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}, |
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{ |
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.name = "fll3-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x01a |
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}, |
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{ |
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.name = "fllao-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x01b |
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}, |
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{ |
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.name = "opclk", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x040 |
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}, |
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{ |
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.name = "opclk-async", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x041 |
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}, |
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{ |
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.name = "pwm1", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x048 |
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}, |
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{ |
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.name = "pwm2", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x049 |
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}, |
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{ |
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.name = "spdif", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x04c |
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}, |
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{ |
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.name = "asrc1-in1-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x088 |
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}, |
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{ |
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.name = "asrc1-in2-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x089 |
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}, |
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{ |
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.name = "asrc2-in1-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x08a |
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}, |
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{ |
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.name = "asrc2-in2-lock", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x08b |
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}, |
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{ |
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.name = "spkl-short-circuit", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x0b6 |
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}, |
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{ |
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.name = "spkr-short-circuit", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x0b7 |
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}, |
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{ |
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.name = "spk-shutdown", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x0e0 |
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}, |
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{ |
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.name = "spk-overheat-shutdown", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x0e1 |
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}, |
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{ |
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.name = "spk-overheat-warn", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x0e2 |
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}, |
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{ |
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.name = "timer1-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x140 |
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}, |
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{ |
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.name = "timer2-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x141 |
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}, |
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{ |
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.name = "timer3-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x142 |
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}, |
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{ |
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.name = "timer4-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x143 |
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}, |
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{ |
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.name = "timer5-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x144 |
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}, |
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{ |
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.name = "timer6-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x145 |
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}, |
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{ |
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.name = "timer7-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x146 |
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}, |
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{ |
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.name = "timer8-sts", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x147 |
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}, |
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{ |
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.name = "log1-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x150 |
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}, |
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{ |
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.name = "log2-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x151 |
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}, |
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{ |
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.name = "log3-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x152 |
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}, |
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{ |
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.name = "log4-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x153 |
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}, |
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{ |
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.name = "log5-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x154 |
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}, |
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{ |
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.name = "log6-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x155 |
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}, |
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{ |
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.name = "log7-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x156 |
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}, |
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{ |
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.name = "log8-fifo-ne", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x157 |
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}, |
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{ |
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.name = "aux-pdm-clk", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x280 |
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}, |
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{ |
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.name = "aux-pdm-dat", |
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.group_names = madera_pin_single_group_names, |
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.func = 0x281 |
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}, |
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}; |
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static u16 madera_pin_make_drv_str(struct madera_pin_private *priv, |
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unsigned int milliamps) |
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{ |
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switch (milliamps) { |
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case 4: |
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return 0; |
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case 8: |
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return 2 << MADERA_GP1_DRV_STR_SHIFT; |
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default: |
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break; |
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} |
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dev_warn(priv->dev, "%u mA not a valid drive strength", milliamps); |
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return 0; |
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} |
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static unsigned int madera_pin_unmake_drv_str(struct madera_pin_private *priv, |
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u16 regval) |
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{ |
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regval = (regval & MADERA_GP1_DRV_STR_MASK) >> MADERA_GP1_DRV_STR_SHIFT; |
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switch (regval) { |
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case 0: |
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return 4; |
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case 2: |
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return 8; |
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default: |
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return 0; |
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} |
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} |
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static int madera_get_groups_count(struct pinctrl_dev *pctldev) |
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{ |
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struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
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/* Number of alt function groups plus number of single-pin groups */ |
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return priv->chip->n_pin_groups + priv->chip->n_pins; |
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} |
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static const char *madera_get_group_name(struct pinctrl_dev *pctldev, |
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unsigned int selector) |
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{ |
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struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
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if (selector < priv->chip->n_pin_groups) |
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return priv->chip->pin_groups[selector].name; |
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selector -= priv->chip->n_pin_groups; |
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return madera_pin_single_group_names[selector]; |
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} |
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static int madera_get_group_pins(struct pinctrl_dev *pctldev, |
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unsigned int selector, |
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const unsigned int **pins, |
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unsigned int *num_pins) |
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{ |
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struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
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if (selector < priv->chip->n_pin_groups) { |
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*pins = priv->chip->pin_groups[selector].pins; |
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*num_pins = priv->chip->pin_groups[selector].n_pins; |
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} else { |
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/* return the dummy group for a single pin */ |
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selector -= priv->chip->n_pin_groups; |
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*pins = &madera_pin_single_group_pins[selector]; |
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*num_pins = 1; |
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} |
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return 0; |
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} |
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static void madera_pin_dbg_show_fn(struct madera_pin_private *priv, |
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struct seq_file *s, |
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unsigned int pin, unsigned int fn) |
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{ |
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const struct madera_pin_chip *chip = priv->chip; |
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int i, g_pin; |
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|
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if (fn != 0) { |
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for (i = 0; i < ARRAY_SIZE(madera_mux_funcs); ++i) { |
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if (madera_mux_funcs[i].func == fn) { |
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seq_printf(s, " FN=%s", |
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madera_mux_funcs[i].name); |
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return; |
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} |
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} |
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return; /* ignore unknown function values */ |
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} |
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|
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/* alt function */ |
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for (i = 0; i < chip->n_pin_groups; ++i) { |
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for (g_pin = 0; g_pin < chip->pin_groups[i].n_pins; ++g_pin) { |
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if (chip->pin_groups[i].pins[g_pin] == pin) { |
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seq_printf(s, " FN=%s", |
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chip->pin_groups[i].name); |
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return; |
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} |
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} |
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} |
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} |
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|
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static void __maybe_unused madera_pin_dbg_show(struct pinctrl_dev *pctldev, |
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struct seq_file *s, |
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unsigned int pin) |
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{ |
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struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
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unsigned int conf[2]; |
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unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); |
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unsigned int fn; |
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int ret; |
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|
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ret = regmap_read(priv->madera->regmap, reg, &conf[0]); |
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if (ret) |
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return; |
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ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]); |
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if (ret) |
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return; |
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seq_printf(s, "%04x:%04x", conf[0], conf[1]); |
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|
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fn = (conf[0] & MADERA_GP1_FN_MASK) >> MADERA_GP1_FN_SHIFT; |
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madera_pin_dbg_show_fn(priv, s, pin, fn); |
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|
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/* State of direction bit is only relevant if function==1 */ |
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if (fn == 1) { |
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if (conf[1] & MADERA_GP1_DIR_MASK) |
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seq_puts(s, " IN"); |
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else |
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seq_puts(s, " OUT"); |
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} |
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if (conf[1] & MADERA_GP1_PU_MASK) |
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seq_puts(s, " PU"); |
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|
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if (conf[1] & MADERA_GP1_PD_MASK) |
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seq_puts(s, " PD"); |
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|
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if (conf[0] & MADERA_GP1_DB_MASK) |
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seq_puts(s, " DB"); |
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|
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if (conf[0] & MADERA_GP1_OP_CFG_MASK) |
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seq_puts(s, " OD"); |
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else |
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seq_puts(s, " CMOS"); |
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|
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seq_printf(s, " DRV=%umA", madera_pin_unmake_drv_str(priv, conf[1])); |
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|
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if (conf[0] & MADERA_GP1_IP_CFG_MASK) |
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seq_puts(s, " SCHMITT"); |
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} |
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|
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static const struct pinctrl_ops madera_pin_group_ops = { |
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.get_groups_count = madera_get_groups_count, |
|
.get_group_name = madera_get_group_name, |
|
.get_group_pins = madera_get_group_pins, |
|
#if IS_ENABLED(CONFIG_OF) |
|
.dt_node_to_map = pinconf_generic_dt_node_to_map_all, |
|
.dt_free_map = pinctrl_utils_free_map, |
|
#endif |
|
#if IS_ENABLED(CONFIG_DEBUG_FS) |
|
.pin_dbg_show = madera_pin_dbg_show, |
|
#endif |
|
}; |
|
|
|
static int madera_mux_get_funcs_count(struct pinctrl_dev *pctldev) |
|
{ |
|
return ARRAY_SIZE(madera_mux_funcs); |
|
} |
|
|
|
static const char *madera_mux_get_func_name(struct pinctrl_dev *pctldev, |
|
unsigned int selector) |
|
{ |
|
return madera_mux_funcs[selector].name; |
|
} |
|
|
|
static int madera_mux_get_groups(struct pinctrl_dev *pctldev, |
|
unsigned int selector, |
|
const char * const **groups, |
|
unsigned int * const num_groups) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
|
|
*groups = madera_mux_funcs[selector].group_names; |
|
|
|
if (madera_mux_funcs[selector].func == 0) { |
|
/* alt func always maps to a single group */ |
|
*num_groups = 1; |
|
} else { |
|
/* other funcs map to all available gpio pins */ |
|
*num_groups = priv->chip->n_pins; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int madera_mux_set_mux(struct pinctrl_dev *pctldev, |
|
unsigned int selector, |
|
unsigned int group) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
struct madera *madera = priv->madera; |
|
const struct madera_pin_groups *pin_group = priv->chip->pin_groups; |
|
unsigned int n_chip_groups = priv->chip->n_pin_groups; |
|
const char *func_name = madera_mux_funcs[selector].name; |
|
unsigned int reg; |
|
int i, ret = 0; |
|
|
|
dev_dbg(priv->dev, "%s selecting %u (%s) for group %u (%s)\n", |
|
__func__, selector, func_name, group, |
|
madera_get_group_name(pctldev, group)); |
|
|
|
if (madera_mux_funcs[selector].func == 0) { |
|
/* alt func pin assignments are codec-specific */ |
|
for (i = 0; i < n_chip_groups; ++i) { |
|
if (strcmp(func_name, pin_group->name) == 0) |
|
break; |
|
|
|
++pin_group; |
|
} |
|
|
|
if (i == n_chip_groups) |
|
return -EINVAL; |
|
|
|
for (i = 0; i < pin_group->n_pins; ++i) { |
|
reg = MADERA_GPIO1_CTRL_1 + (2 * pin_group->pins[i]); |
|
|
|
dev_dbg(priv->dev, "%s setting 0x%x func bits to 0\n", |
|
__func__, reg); |
|
|
|
ret = regmap_update_bits(madera->regmap, reg, |
|
MADERA_GP1_FN_MASK, 0); |
|
if (ret) |
|
break; |
|
|
|
} |
|
} else { |
|
/* |
|
* for other funcs the group will be the gpio number and will |
|
* be offset by the number of chip-specific functions at the |
|
* start of the group list |
|
*/ |
|
group -= n_chip_groups; |
|
reg = MADERA_GPIO1_CTRL_1 + (2 * group); |
|
|
|
dev_dbg(priv->dev, "%s setting 0x%x func bits to 0x%x\n", |
|
__func__, reg, madera_mux_funcs[selector].func); |
|
|
|
ret = regmap_update_bits(madera->regmap, |
|
reg, |
|
MADERA_GP1_FN_MASK, |
|
madera_mux_funcs[selector].func); |
|
} |
|
|
|
if (ret) |
|
dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); |
|
|
|
return ret; |
|
} |
|
|
|
static int madera_gpio_set_direction(struct pinctrl_dev *pctldev, |
|
struct pinctrl_gpio_range *range, |
|
unsigned int offset, |
|
bool input) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
struct madera *madera = priv->madera; |
|
unsigned int reg = MADERA_GPIO1_CTRL_2 + (2 * offset); |
|
unsigned int val; |
|
int ret; |
|
|
|
if (input) |
|
val = MADERA_GP1_DIR; |
|
else |
|
val = 0; |
|
|
|
ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_DIR_MASK, val); |
|
if (ret) |
|
dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); |
|
|
|
return ret; |
|
} |
|
|
|
static int madera_gpio_request_enable(struct pinctrl_dev *pctldev, |
|
struct pinctrl_gpio_range *range, |
|
unsigned int offset) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
struct madera *madera = priv->madera; |
|
unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset); |
|
int ret; |
|
|
|
/* put the pin into GPIO mode */ |
|
ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1); |
|
if (ret) |
|
dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); |
|
|
|
return ret; |
|
} |
|
|
|
static void madera_gpio_disable_free(struct pinctrl_dev *pctldev, |
|
struct pinctrl_gpio_range *range, |
|
unsigned int offset) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
struct madera *madera = priv->madera; |
|
unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * offset); |
|
int ret; |
|
|
|
/* disable GPIO by setting to GPIO IN */ |
|
madera_gpio_set_direction(pctldev, range, offset, true); |
|
|
|
ret = regmap_update_bits(madera->regmap, reg, MADERA_GP1_FN_MASK, 1); |
|
if (ret) |
|
dev_err(priv->dev, "Failed to write to 0x%x (%d)\n", reg, ret); |
|
} |
|
|
|
static const struct pinmux_ops madera_pin_mux_ops = { |
|
.get_functions_count = madera_mux_get_funcs_count, |
|
.get_function_name = madera_mux_get_func_name, |
|
.get_function_groups = madera_mux_get_groups, |
|
.set_mux = madera_mux_set_mux, |
|
.gpio_request_enable = madera_gpio_request_enable, |
|
.gpio_disable_free = madera_gpio_disable_free, |
|
.gpio_set_direction = madera_gpio_set_direction, |
|
.strict = true, /* GPIO and other functions are exclusive */ |
|
}; |
|
|
|
static int madera_pin_conf_get(struct pinctrl_dev *pctldev, unsigned int pin, |
|
unsigned long *config) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
unsigned int param = pinconf_to_config_param(*config); |
|
unsigned int result = 0; |
|
unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); |
|
unsigned int conf[2]; |
|
int ret; |
|
|
|
ret = regmap_read(priv->madera->regmap, reg, &conf[0]); |
|
if (!ret) |
|
ret = regmap_read(priv->madera->regmap, reg + 1, &conf[1]); |
|
|
|
if (ret) { |
|
dev_err(priv->dev, "Failed to read GP%d conf (%d)\n", |
|
pin + 1, ret); |
|
return ret; |
|
} |
|
|
|
switch (param) { |
|
case PIN_CONFIG_BIAS_BUS_HOLD: |
|
conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
if (conf[1] == (MADERA_GP1_PU | MADERA_GP1_PD)) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_BIAS_DISABLE: |
|
conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
if (!conf[1]) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_BIAS_PULL_DOWN: |
|
conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
if (conf[1] == MADERA_GP1_PD_MASK) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_BIAS_PULL_UP: |
|
conf[1] &= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
if (conf[1] == MADERA_GP1_PU_MASK) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_DRIVE_OPEN_DRAIN: |
|
if (conf[0] & MADERA_GP1_OP_CFG_MASK) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_DRIVE_PUSH_PULL: |
|
if (!(conf[0] & MADERA_GP1_OP_CFG_MASK)) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_DRIVE_STRENGTH: |
|
result = madera_pin_unmake_drv_str(priv, conf[1]); |
|
break; |
|
case PIN_CONFIG_INPUT_DEBOUNCE: |
|
if (conf[0] & MADERA_GP1_DB_MASK) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_INPUT_ENABLE: |
|
if (conf[0] & MADERA_GP1_DIR_MASK) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_INPUT_SCHMITT: |
|
case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
|
if (conf[0] & MADERA_GP1_IP_CFG_MASK) |
|
result = 1; |
|
break; |
|
case PIN_CONFIG_OUTPUT: |
|
if ((conf[1] & MADERA_GP1_DIR_MASK) && |
|
(conf[0] & MADERA_GP1_LVL_MASK)) |
|
result = 1; |
|
break; |
|
default: |
|
return -ENOTSUPP; |
|
} |
|
|
|
*config = pinconf_to_config_packed(param, result); |
|
|
|
return 0; |
|
} |
|
|
|
static int madera_pin_conf_set(struct pinctrl_dev *pctldev, unsigned int pin, |
|
unsigned long *configs, unsigned int num_configs) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
u16 conf[2] = {0, 0}; |
|
u16 mask[2] = {0, 0}; |
|
unsigned int reg = MADERA_GPIO1_CTRL_1 + (2 * pin); |
|
unsigned int val; |
|
int ret; |
|
|
|
while (num_configs) { |
|
dev_dbg(priv->dev, "%s config 0x%lx\n", __func__, *configs); |
|
|
|
switch (pinconf_to_config_param(*configs)) { |
|
case PIN_CONFIG_BIAS_BUS_HOLD: |
|
mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
conf[1] |= MADERA_GP1_PU | MADERA_GP1_PD; |
|
break; |
|
case PIN_CONFIG_BIAS_DISABLE: |
|
mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
conf[1] &= ~(MADERA_GP1_PU | MADERA_GP1_PD); |
|
break; |
|
case PIN_CONFIG_BIAS_PULL_DOWN: |
|
mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
conf[1] |= MADERA_GP1_PD; |
|
conf[1] &= ~MADERA_GP1_PU; |
|
break; |
|
case PIN_CONFIG_BIAS_PULL_UP: |
|
mask[1] |= MADERA_GP1_PU_MASK | MADERA_GP1_PD_MASK; |
|
conf[1] |= MADERA_GP1_PU; |
|
conf[1] &= ~MADERA_GP1_PD; |
|
break; |
|
case PIN_CONFIG_DRIVE_OPEN_DRAIN: |
|
mask[0] |= MADERA_GP1_OP_CFG_MASK; |
|
conf[0] |= MADERA_GP1_OP_CFG; |
|
break; |
|
case PIN_CONFIG_DRIVE_PUSH_PULL: |
|
mask[0] |= MADERA_GP1_OP_CFG_MASK; |
|
conf[0] &= ~MADERA_GP1_OP_CFG; |
|
break; |
|
case PIN_CONFIG_DRIVE_STRENGTH: |
|
val = pinconf_to_config_argument(*configs); |
|
mask[1] |= MADERA_GP1_DRV_STR_MASK; |
|
conf[1] &= ~MADERA_GP1_DRV_STR_MASK; |
|
conf[1] |= madera_pin_make_drv_str(priv, val); |
|
break; |
|
case PIN_CONFIG_INPUT_DEBOUNCE: |
|
mask[0] |= MADERA_GP1_DB_MASK; |
|
|
|
/* |
|
* we can't configure debounce time per-pin so value |
|
* is just a flag |
|
*/ |
|
val = pinconf_to_config_argument(*configs); |
|
if (val) |
|
conf[0] |= MADERA_GP1_DB; |
|
else |
|
conf[0] &= ~MADERA_GP1_DB; |
|
break; |
|
case PIN_CONFIG_INPUT_ENABLE: |
|
val = pinconf_to_config_argument(*configs); |
|
mask[1] |= MADERA_GP1_DIR_MASK; |
|
if (val) |
|
conf[1] |= MADERA_GP1_DIR; |
|
else |
|
conf[1] &= ~MADERA_GP1_DIR; |
|
break; |
|
case PIN_CONFIG_INPUT_SCHMITT: |
|
val = pinconf_to_config_argument(*configs); |
|
mask[0] |= MADERA_GP1_IP_CFG; |
|
if (val) |
|
conf[0] |= MADERA_GP1_IP_CFG; |
|
else |
|
conf[0] &= ~MADERA_GP1_IP_CFG; |
|
|
|
mask[1] |= MADERA_GP1_DIR_MASK; |
|
conf[1] |= MADERA_GP1_DIR; |
|
break; |
|
case PIN_CONFIG_INPUT_SCHMITT_ENABLE: |
|
mask[0] |= MADERA_GP1_IP_CFG; |
|
conf[0] |= MADERA_GP1_IP_CFG; |
|
mask[1] |= MADERA_GP1_DIR_MASK; |
|
conf[1] |= MADERA_GP1_DIR; |
|
break; |
|
case PIN_CONFIG_OUTPUT: |
|
val = pinconf_to_config_argument(*configs); |
|
mask[0] |= MADERA_GP1_LVL_MASK; |
|
if (val) |
|
conf[0] |= MADERA_GP1_LVL; |
|
else |
|
conf[0] &= ~MADERA_GP1_LVL; |
|
|
|
mask[1] |= MADERA_GP1_DIR_MASK; |
|
conf[1] &= ~MADERA_GP1_DIR; |
|
break; |
|
default: |
|
return -ENOTSUPP; |
|
} |
|
|
|
++configs; |
|
--num_configs; |
|
} |
|
|
|
dev_dbg(priv->dev, |
|
"%s gpio%d 0x%x:0x%x 0x%x:0x%x\n", |
|
__func__, pin + 1, reg, conf[0], reg + 1, conf[1]); |
|
|
|
ret = regmap_update_bits(priv->madera->regmap, reg, mask[0], conf[0]); |
|
if (ret) |
|
goto err; |
|
|
|
++reg; |
|
ret = regmap_update_bits(priv->madera->regmap, reg, mask[1], conf[1]); |
|
if (ret) |
|
goto err; |
|
|
|
return 0; |
|
|
|
err: |
|
dev_err(priv->dev, |
|
"Failed to write GPIO%d conf (%d) reg 0x%x\n", |
|
pin + 1, ret, reg); |
|
|
|
return ret; |
|
} |
|
|
|
static int madera_pin_conf_group_set(struct pinctrl_dev *pctldev, |
|
unsigned int selector, |
|
unsigned long *configs, |
|
unsigned int num_configs) |
|
{ |
|
struct madera_pin_private *priv = pinctrl_dev_get_drvdata(pctldev); |
|
const struct madera_pin_groups *pin_group; |
|
unsigned int n_groups = priv->chip->n_pin_groups; |
|
int i, ret; |
|
|
|
dev_dbg(priv->dev, "%s setting group %s\n", __func__, |
|
madera_get_group_name(pctldev, selector)); |
|
|
|
if (selector >= n_groups) { |
|
/* group is a single pin, convert to pin number and set */ |
|
return madera_pin_conf_set(pctldev, |
|
selector - n_groups, |
|
configs, |
|
num_configs); |
|
} else { |
|
pin_group = &priv->chip->pin_groups[selector]; |
|
|
|
for (i = 0; i < pin_group->n_pins; ++i) { |
|
ret = madera_pin_conf_set(pctldev, |
|
pin_group->pins[i], |
|
configs, |
|
num_configs); |
|
if (ret) |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct pinconf_ops madera_pin_conf_ops = { |
|
.is_generic = true, |
|
.pin_config_get = madera_pin_conf_get, |
|
.pin_config_set = madera_pin_conf_set, |
|
.pin_config_group_set = madera_pin_conf_group_set, |
|
}; |
|
|
|
static struct pinctrl_desc madera_pin_desc = { |
|
.name = "madera-pinctrl", |
|
.pins = madera_pins, |
|
.pctlops = &madera_pin_group_ops, |
|
.pmxops = &madera_pin_mux_ops, |
|
.confops = &madera_pin_conf_ops, |
|
.owner = THIS_MODULE, |
|
}; |
|
|
|
static int madera_pin_probe(struct platform_device *pdev) |
|
{ |
|
struct madera *madera = dev_get_drvdata(pdev->dev.parent); |
|
const struct madera_pdata *pdata = &madera->pdata; |
|
struct madera_pin_private *priv; |
|
int ret; |
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(madera_pin_single_group_names) != |
|
ARRAY_SIZE(madera_pin_single_group_pins)); |
|
|
|
dev_dbg(&pdev->dev, "%s\n", __func__); |
|
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); |
|
if (!priv) |
|
return -ENOMEM; |
|
|
|
priv->dev = &pdev->dev; |
|
priv->madera = madera; |
|
pdev->dev.of_node = madera->dev->of_node; |
|
|
|
switch (madera->type) { |
|
case CS47L15: |
|
if (IS_ENABLED(CONFIG_PINCTRL_CS47L15)) |
|
priv->chip = &cs47l15_pin_chip; |
|
break; |
|
case CS47L35: |
|
if (IS_ENABLED(CONFIG_PINCTRL_CS47L35)) |
|
priv->chip = &cs47l35_pin_chip; |
|
break; |
|
case CS47L85: |
|
case WM1840: |
|
if (IS_ENABLED(CONFIG_PINCTRL_CS47L85)) |
|
priv->chip = &cs47l85_pin_chip; |
|
break; |
|
case CS47L90: |
|
case CS47L91: |
|
if (IS_ENABLED(CONFIG_PINCTRL_CS47L90)) |
|
priv->chip = &cs47l90_pin_chip; |
|
break; |
|
case CS42L92: |
|
case CS47L92: |
|
case CS47L93: |
|
if (IS_ENABLED(CONFIG_PINCTRL_CS47L92)) |
|
priv->chip = &cs47l92_pin_chip; |
|
break; |
|
default: |
|
break; |
|
} |
|
|
|
if (!priv->chip) |
|
return -ENODEV; |
|
|
|
madera_pin_desc.npins = priv->chip->n_pins; |
|
|
|
ret = devm_pinctrl_register_and_init(&pdev->dev, |
|
&madera_pin_desc, |
|
priv, |
|
&priv->pctl); |
|
if (ret) { |
|
dev_err(priv->dev, "Failed pinctrl register (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
/* if the configuration is provided through pdata, apply it */ |
|
if (pdata->gpio_configs) { |
|
ret = pinctrl_register_mappings(pdata->gpio_configs, |
|
pdata->n_gpio_configs); |
|
if (ret) { |
|
dev_err(priv->dev, |
|
"Failed to register pdata mappings (%d)\n", |
|
ret); |
|
return ret; |
|
} |
|
} |
|
|
|
ret = pinctrl_enable(priv->pctl); |
|
if (ret) { |
|
dev_err(priv->dev, "Failed to enable pinctrl (%d)\n", ret); |
|
return ret; |
|
} |
|
|
|
platform_set_drvdata(pdev, priv); |
|
|
|
dev_dbg(priv->dev, "pinctrl probed ok\n"); |
|
|
|
return 0; |
|
} |
|
|
|
static int madera_pin_remove(struct platform_device *pdev) |
|
{ |
|
struct madera_pin_private *priv = platform_get_drvdata(pdev); |
|
|
|
if (priv->madera->pdata.gpio_configs) |
|
pinctrl_unregister_mappings(priv->madera->pdata.gpio_configs); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver madera_pin_driver = { |
|
.probe = madera_pin_probe, |
|
.remove = madera_pin_remove, |
|
.driver = { |
|
.name = "madera-pinctrl", |
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}, |
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}; |
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|
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module_platform_driver(madera_pin_driver); |
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|
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MODULE_DESCRIPTION("Madera pinctrl driver"); |
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MODULE_AUTHOR("Richard Fitzgerald <[email protected]>"); |
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MODULE_LICENSE("GPL v2");
|
|
|