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143 lines
3.6 KiB
143 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* |
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* Copyright (C) 2012 ARM Limited |
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*/ |
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#include <linux/gpio/driver.h> |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <linux/mfd/core.h> |
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#include <linux/module.h> |
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#include <linux/of_platform.h> |
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#include <linux/platform_data/syscon.h> |
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#include <linux/platform_device.h> |
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#include <linux/slab.h> |
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#include <linux/stat.h> |
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#define SYS_ID 0x000 |
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#define SYS_SW 0x004 |
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#define SYS_LED 0x008 |
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#define SYS_100HZ 0x024 |
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#define SYS_FLAGSSET 0x030 |
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#define SYS_FLAGSCLR 0x034 |
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#define SYS_NVFLAGS 0x038 |
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#define SYS_NVFLAGSSET 0x038 |
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#define SYS_NVFLAGSCLR 0x03c |
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#define SYS_MCI 0x048 |
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#define SYS_FLASH 0x04c |
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#define SYS_CFGSW 0x058 |
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#define SYS_24MHZ 0x05c |
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#define SYS_MISC 0x060 |
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#define SYS_DMA 0x064 |
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#define SYS_PROCID0 0x084 |
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#define SYS_PROCID1 0x088 |
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#define SYS_CFGDATA 0x0a0 |
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#define SYS_CFGCTRL 0x0a4 |
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#define SYS_CFGSTAT 0x0a8 |
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/* The sysreg block is just a random collection of various functions... */ |
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static struct bgpio_pdata vexpress_sysreg_sys_led_pdata = { |
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.label = "sys_led", |
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.base = -1, |
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.ngpio = 8, |
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}; |
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static struct bgpio_pdata vexpress_sysreg_sys_mci_pdata = { |
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.label = "sys_mci", |
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.base = -1, |
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.ngpio = 2, |
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}; |
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static struct bgpio_pdata vexpress_sysreg_sys_flash_pdata = { |
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.label = "sys_flash", |
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.base = -1, |
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.ngpio = 1, |
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}; |
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static struct mfd_cell vexpress_sysreg_cells[] = { |
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{ |
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.name = "basic-mmio-gpio", |
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.of_compatible = "arm,vexpress-sysreg,sys_led", |
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.num_resources = 1, |
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.resources = (struct resource []) { |
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DEFINE_RES_MEM_NAMED(SYS_LED, 0x4, "dat"), |
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}, |
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.platform_data = &vexpress_sysreg_sys_led_pdata, |
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.pdata_size = sizeof(vexpress_sysreg_sys_led_pdata), |
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}, { |
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.name = "basic-mmio-gpio", |
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.of_compatible = "arm,vexpress-sysreg,sys_mci", |
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.num_resources = 1, |
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.resources = (struct resource []) { |
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DEFINE_RES_MEM_NAMED(SYS_MCI, 0x4, "dat"), |
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}, |
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.platform_data = &vexpress_sysreg_sys_mci_pdata, |
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.pdata_size = sizeof(vexpress_sysreg_sys_mci_pdata), |
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}, { |
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.name = "basic-mmio-gpio", |
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.of_compatible = "arm,vexpress-sysreg,sys_flash", |
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.num_resources = 1, |
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.resources = (struct resource []) { |
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DEFINE_RES_MEM_NAMED(SYS_FLASH, 0x4, "dat"), |
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}, |
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.platform_data = &vexpress_sysreg_sys_flash_pdata, |
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.pdata_size = sizeof(vexpress_sysreg_sys_flash_pdata), |
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}, { |
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.name = "vexpress-syscfg", |
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.num_resources = 1, |
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.resources = (struct resource []) { |
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DEFINE_RES_MEM(SYS_MISC, 0x4c), |
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}, |
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} |
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}; |
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static int vexpress_sysreg_probe(struct platform_device *pdev) |
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{ |
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struct resource *mem; |
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void __iomem *base; |
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struct gpio_chip *mmc_gpio_chip; |
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
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if (!mem) |
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return -EINVAL; |
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base = devm_ioremap(&pdev->dev, mem->start, resource_size(mem)); |
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if (!base) |
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return -ENOMEM; |
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/* |
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* Duplicated SYS_MCI pseudo-GPIO controller for compatibility with |
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* older trees using sysreg node for MMC control lines. |
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*/ |
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mmc_gpio_chip = devm_kzalloc(&pdev->dev, sizeof(*mmc_gpio_chip), |
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GFP_KERNEL); |
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if (!mmc_gpio_chip) |
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return -ENOMEM; |
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bgpio_init(mmc_gpio_chip, &pdev->dev, 0x4, base + SYS_MCI, |
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NULL, NULL, NULL, NULL, 0); |
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mmc_gpio_chip->ngpio = 2; |
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devm_gpiochip_add_data(&pdev->dev, mmc_gpio_chip, NULL); |
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return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO, |
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vexpress_sysreg_cells, |
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ARRAY_SIZE(vexpress_sysreg_cells), mem, 0, NULL); |
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} |
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static const struct of_device_id vexpress_sysreg_match[] = { |
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{ .compatible = "arm,vexpress-sysreg", }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, vexpress_sysreg_match); |
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static struct platform_driver vexpress_sysreg_driver = { |
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.driver = { |
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.name = "vexpress-sysreg", |
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.of_match_table = vexpress_sysreg_match, |
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}, |
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.probe = vexpress_sysreg_probe, |
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}; |
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module_platform_driver(vexpress_sysreg_driver); |
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MODULE_LICENSE("GPL v2");
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