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773 lines
19 KiB
773 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* drivers/leds/leds-as3645a.c - AS3645A and LM3555 flash controllers driver |
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* |
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* Copyright (C) 2008-2011 Nokia Corporation |
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* Copyright (c) 2011, 2017 Intel Corporation. |
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* |
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* Based on drivers/media/i2c/as3645a.c. |
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* |
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* Contact: Sakari Ailus <[email protected]> |
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*/ |
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#include <linux/delay.h> |
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#include <linux/gpio/consumer.h> |
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#include <linux/i2c.h> |
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#include <linux/led-class-flash.h> |
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#include <linux/leds.h> |
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#include <linux/module.h> |
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#include <linux/mutex.h> |
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#include <linux/property.h> |
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#include <linux/slab.h> |
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#include <media/v4l2-flash-led-class.h> |
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#define AS_TIMER_US_TO_CODE(t) (((t) / 1000 - 100) / 50) |
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#define AS_TIMER_CODE_TO_US(c) ((50 * (c) + 100) * 1000) |
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/* Register definitions */ |
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/* Read-only Design info register: Reset state: xxxx 0001 */ |
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#define AS_DESIGN_INFO_REG 0x00 |
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#define AS_DESIGN_INFO_FACTORY(x) (((x) >> 4)) |
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#define AS_DESIGN_INFO_MODEL(x) ((x) & 0x0f) |
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/* Read-only Version control register: Reset state: 0000 0000 |
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* for first engineering samples |
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*/ |
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#define AS_VERSION_CONTROL_REG 0x01 |
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#define AS_VERSION_CONTROL_RFU(x) (((x) >> 4)) |
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#define AS_VERSION_CONTROL_VERSION(x) ((x) & 0x0f) |
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/* Read / Write (Indicator and timer register): Reset state: 0000 1111 */ |
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#define AS_INDICATOR_AND_TIMER_REG 0x02 |
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#define AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT 0 |
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#define AS_INDICATOR_AND_TIMER_VREF_SHIFT 4 |
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#define AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT 6 |
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/* Read / Write (Current set register): Reset state: 0110 1001 */ |
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#define AS_CURRENT_SET_REG 0x03 |
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#define AS_CURRENT_ASSIST_LIGHT_SHIFT 0 |
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#define AS_CURRENT_LED_DET_ON (1 << 3) |
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#define AS_CURRENT_FLASH_CURRENT_SHIFT 4 |
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/* Read / Write (Control register): Reset state: 1011 0100 */ |
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#define AS_CONTROL_REG 0x04 |
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#define AS_CONTROL_MODE_SETTING_SHIFT 0 |
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#define AS_CONTROL_STROBE_ON (1 << 2) |
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#define AS_CONTROL_OUT_ON (1 << 3) |
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#define AS_CONTROL_EXT_TORCH_ON (1 << 4) |
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#define AS_CONTROL_STROBE_TYPE_EDGE (0 << 5) |
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#define AS_CONTROL_STROBE_TYPE_LEVEL (1 << 5) |
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#define AS_CONTROL_COIL_PEAK_SHIFT 6 |
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/* Read only (D3 is read / write) (Fault and info): Reset state: 0000 x000 */ |
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#define AS_FAULT_INFO_REG 0x05 |
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#define AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT (1 << 1) |
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#define AS_FAULT_INFO_INDICATOR_LED (1 << 2) |
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#define AS_FAULT_INFO_LED_AMOUNT (1 << 3) |
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#define AS_FAULT_INFO_TIMEOUT (1 << 4) |
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#define AS_FAULT_INFO_OVER_TEMPERATURE (1 << 5) |
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#define AS_FAULT_INFO_SHORT_CIRCUIT (1 << 6) |
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#define AS_FAULT_INFO_OVER_VOLTAGE (1 << 7) |
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/* Boost register */ |
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#define AS_BOOST_REG 0x0d |
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#define AS_BOOST_CURRENT_DISABLE (0 << 0) |
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#define AS_BOOST_CURRENT_ENABLE (1 << 0) |
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/* Password register is used to unlock boost register writing */ |
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#define AS_PASSWORD_REG 0x0f |
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#define AS_PASSWORD_UNLOCK_VALUE 0x55 |
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#define AS_NAME "as3645a" |
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#define AS_I2C_ADDR (0x60 >> 1) /* W:0x60, R:0x61 */ |
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#define AS_FLASH_TIMEOUT_MIN 100000 /* us */ |
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#define AS_FLASH_TIMEOUT_MAX 850000 |
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#define AS_FLASH_TIMEOUT_STEP 50000 |
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#define AS_FLASH_INTENSITY_MIN 200000 /* uA */ |
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#define AS_FLASH_INTENSITY_MAX_1LED 500000 |
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#define AS_FLASH_INTENSITY_MAX_2LEDS 400000 |
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#define AS_FLASH_INTENSITY_STEP 20000 |
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#define AS_TORCH_INTENSITY_MIN 20000 /* uA */ |
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#define AS_TORCH_INTENSITY_MAX 160000 |
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#define AS_TORCH_INTENSITY_STEP 20000 |
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#define AS_INDICATOR_INTENSITY_MIN 0 /* uA */ |
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#define AS_INDICATOR_INTENSITY_MAX 10000 |
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#define AS_INDICATOR_INTENSITY_STEP 2500 |
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#define AS_PEAK_mA_MAX 2000 |
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#define AS_PEAK_mA_TO_REG(a) \ |
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((min_t(u32, AS_PEAK_mA_MAX, a) - 1250) / 250) |
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/* LED numbers for Devicetree */ |
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#define AS_LED_FLASH 0 |
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#define AS_LED_INDICATOR 1 |
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enum as_mode { |
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AS_MODE_EXT_TORCH = 0 << AS_CONTROL_MODE_SETTING_SHIFT, |
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AS_MODE_INDICATOR = 1 << AS_CONTROL_MODE_SETTING_SHIFT, |
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AS_MODE_ASSIST = 2 << AS_CONTROL_MODE_SETTING_SHIFT, |
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AS_MODE_FLASH = 3 << AS_CONTROL_MODE_SETTING_SHIFT, |
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}; |
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struct as3645a_config { |
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u32 flash_timeout_us; |
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u32 flash_max_ua; |
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u32 assist_max_ua; |
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u32 indicator_max_ua; |
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u32 voltage_reference; |
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u32 peak; |
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}; |
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struct as3645a { |
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struct i2c_client *client; |
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struct mutex mutex; |
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struct led_classdev_flash fled; |
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struct led_classdev iled_cdev; |
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struct v4l2_flash *vf; |
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struct v4l2_flash *vfind; |
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struct fwnode_handle *flash_node; |
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struct fwnode_handle *indicator_node; |
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struct as3645a_config cfg; |
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enum as_mode mode; |
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unsigned int timeout; |
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unsigned int flash_current; |
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unsigned int assist_current; |
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unsigned int indicator_current; |
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enum v4l2_flash_strobe_source strobe_source; |
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}; |
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#define fled_to_as3645a(__fled) container_of(__fled, struct as3645a, fled) |
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#define iled_cdev_to_as3645a(__iled_cdev) \ |
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container_of(__iled_cdev, struct as3645a, iled_cdev) |
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/* Return negative errno else zero on success */ |
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static int as3645a_write(struct as3645a *flash, u8 addr, u8 val) |
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{ |
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struct i2c_client *client = flash->client; |
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int rval; |
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rval = i2c_smbus_write_byte_data(client, addr, val); |
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dev_dbg(&client->dev, "Write Addr:%02X Val:%02X %s\n", addr, val, |
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rval < 0 ? "fail" : "ok"); |
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return rval; |
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} |
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/* Return negative errno else a data byte received from the device. */ |
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static int as3645a_read(struct as3645a *flash, u8 addr) |
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{ |
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struct i2c_client *client = flash->client; |
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int rval; |
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rval = i2c_smbus_read_byte_data(client, addr); |
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dev_dbg(&client->dev, "Read Addr:%02X Val:%02X %s\n", addr, rval, |
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rval < 0 ? "fail" : "ok"); |
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return rval; |
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} |
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/* ----------------------------------------------------------------------------- |
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* Hardware configuration and trigger |
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*/ |
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/** |
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* as3645a_set_config - Set flash configuration registers |
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* @flash: The flash |
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* |
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* Configure the hardware with flash, assist and indicator currents, as well as |
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* flash timeout. |
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* |
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* Return 0 on success, or a negative error code if an I2C communication error |
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* occurred. |
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*/ |
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static int as3645a_set_current(struct as3645a *flash) |
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{ |
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u8 val; |
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val = (flash->flash_current << AS_CURRENT_FLASH_CURRENT_SHIFT) |
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| (flash->assist_current << AS_CURRENT_ASSIST_LIGHT_SHIFT) |
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| AS_CURRENT_LED_DET_ON; |
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return as3645a_write(flash, AS_CURRENT_SET_REG, val); |
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} |
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static int as3645a_set_timeout(struct as3645a *flash) |
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{ |
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u8 val; |
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val = flash->timeout << AS_INDICATOR_AND_TIMER_TIMEOUT_SHIFT; |
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val |= (flash->cfg.voltage_reference |
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<< AS_INDICATOR_AND_TIMER_VREF_SHIFT) |
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| ((flash->indicator_current ? flash->indicator_current - 1 : 0) |
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<< AS_INDICATOR_AND_TIMER_INDICATOR_SHIFT); |
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return as3645a_write(flash, AS_INDICATOR_AND_TIMER_REG, val); |
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} |
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/** |
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* as3645a_set_control - Set flash control register |
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* @flash: The flash |
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* @mode: Desired output mode |
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* @on: Desired output state |
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* |
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* Configure the hardware with output mode and state. |
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* |
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* Return 0 on success, or a negative error code if an I2C communication error |
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* occurred. |
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*/ |
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static int |
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as3645a_set_control(struct as3645a *flash, enum as_mode mode, bool on) |
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{ |
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u8 reg; |
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/* Configure output parameters and operation mode. */ |
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reg = (flash->cfg.peak << AS_CONTROL_COIL_PEAK_SHIFT) |
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| (on ? AS_CONTROL_OUT_ON : 0) |
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| mode; |
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if (mode == AS_MODE_FLASH && |
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flash->strobe_source == V4L2_FLASH_STROBE_SOURCE_EXTERNAL) |
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reg |= AS_CONTROL_STROBE_TYPE_LEVEL |
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| AS_CONTROL_STROBE_ON; |
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return as3645a_write(flash, AS_CONTROL_REG, reg); |
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} |
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static int as3645a_get_fault(struct led_classdev_flash *fled, u32 *fault) |
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{ |
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struct as3645a *flash = fled_to_as3645a(fled); |
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int rval; |
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/* NOTE: reading register clears fault status */ |
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rval = as3645a_read(flash, AS_FAULT_INFO_REG); |
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if (rval < 0) |
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return rval; |
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if (rval & AS_FAULT_INFO_INDUCTOR_PEAK_LIMIT) |
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*fault |= LED_FAULT_OVER_CURRENT; |
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if (rval & AS_FAULT_INFO_INDICATOR_LED) |
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*fault |= LED_FAULT_INDICATOR; |
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dev_dbg(&flash->client->dev, "%u connected LEDs\n", |
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rval & AS_FAULT_INFO_LED_AMOUNT ? 2 : 1); |
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if (rval & AS_FAULT_INFO_TIMEOUT) |
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*fault |= LED_FAULT_TIMEOUT; |
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if (rval & AS_FAULT_INFO_OVER_TEMPERATURE) |
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*fault |= LED_FAULT_OVER_TEMPERATURE; |
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if (rval & AS_FAULT_INFO_SHORT_CIRCUIT) |
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*fault |= LED_FAULT_OVER_CURRENT; |
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if (rval & AS_FAULT_INFO_OVER_VOLTAGE) |
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*fault |= LED_FAULT_INPUT_VOLTAGE; |
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return rval; |
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} |
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static unsigned int __as3645a_current_to_reg(unsigned int min, unsigned int max, |
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unsigned int step, |
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unsigned int val) |
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{ |
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if (val < min) |
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val = min; |
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if (val > max) |
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val = max; |
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return (val - min) / step; |
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} |
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static unsigned int as3645a_current_to_reg(struct as3645a *flash, bool is_flash, |
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unsigned int ua) |
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{ |
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if (is_flash) |
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return __as3645a_current_to_reg(AS_TORCH_INTENSITY_MIN, |
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flash->cfg.assist_max_ua, |
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AS_TORCH_INTENSITY_STEP, ua); |
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else |
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return __as3645a_current_to_reg(AS_FLASH_INTENSITY_MIN, |
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flash->cfg.flash_max_ua, |
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AS_FLASH_INTENSITY_STEP, ua); |
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} |
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static int as3645a_set_indicator_brightness(struct led_classdev *iled_cdev, |
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enum led_brightness brightness) |
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{ |
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struct as3645a *flash = iled_cdev_to_as3645a(iled_cdev); |
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int rval; |
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flash->indicator_current = brightness; |
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rval = as3645a_set_timeout(flash); |
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if (rval) |
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return rval; |
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return as3645a_set_control(flash, AS_MODE_INDICATOR, brightness); |
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} |
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static int as3645a_set_assist_brightness(struct led_classdev *fled_cdev, |
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enum led_brightness brightness) |
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{ |
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struct led_classdev_flash *fled = lcdev_to_flcdev(fled_cdev); |
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struct as3645a *flash = fled_to_as3645a(fled); |
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int rval; |
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if (brightness) { |
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/* Register value 0 is 20 mA. */ |
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flash->assist_current = brightness - 1; |
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rval = as3645a_set_current(flash); |
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if (rval) |
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return rval; |
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} |
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return as3645a_set_control(flash, AS_MODE_ASSIST, brightness); |
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} |
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static int as3645a_set_flash_brightness(struct led_classdev_flash *fled, |
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u32 brightness_ua) |
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{ |
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struct as3645a *flash = fled_to_as3645a(fled); |
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flash->flash_current = as3645a_current_to_reg(flash, true, |
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brightness_ua); |
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return as3645a_set_current(flash); |
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} |
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static int as3645a_set_flash_timeout(struct led_classdev_flash *fled, |
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u32 timeout_us) |
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{ |
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struct as3645a *flash = fled_to_as3645a(fled); |
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flash->timeout = AS_TIMER_US_TO_CODE(timeout_us); |
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return as3645a_set_timeout(flash); |
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} |
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static int as3645a_set_strobe(struct led_classdev_flash *fled, bool state) |
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{ |
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struct as3645a *flash = fled_to_as3645a(fled); |
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return as3645a_set_control(flash, AS_MODE_FLASH, state); |
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} |
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static const struct led_flash_ops as3645a_led_flash_ops = { |
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.flash_brightness_set = as3645a_set_flash_brightness, |
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.timeout_set = as3645a_set_flash_timeout, |
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.strobe_set = as3645a_set_strobe, |
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.fault_get = as3645a_get_fault, |
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}; |
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static int as3645a_setup(struct as3645a *flash) |
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{ |
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struct device *dev = &flash->client->dev; |
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u32 fault = 0; |
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int rval; |
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/* clear errors */ |
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rval = as3645a_read(flash, AS_FAULT_INFO_REG); |
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if (rval < 0) |
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return rval; |
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dev_dbg(dev, "Fault info: %02x\n", rval); |
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rval = as3645a_set_current(flash); |
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if (rval < 0) |
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return rval; |
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rval = as3645a_set_timeout(flash); |
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if (rval < 0) |
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return rval; |
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rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false); |
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if (rval < 0) |
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return rval; |
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/* read status */ |
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rval = as3645a_get_fault(&flash->fled, &fault); |
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if (rval < 0) |
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return rval; |
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dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n", |
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as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG)); |
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dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n", |
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as3645a_read(flash, AS_CURRENT_SET_REG)); |
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dev_dbg(dev, "AS_CONTROL_REG: %02x\n", |
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as3645a_read(flash, AS_CONTROL_REG)); |
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return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0; |
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} |
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static int as3645a_detect(struct as3645a *flash) |
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{ |
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struct device *dev = &flash->client->dev; |
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int rval, man, model, rfu, version; |
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const char *vendor; |
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rval = as3645a_read(flash, AS_DESIGN_INFO_REG); |
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if (rval < 0) { |
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dev_err(dev, "can't read design info reg\n"); |
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return rval; |
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} |
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man = AS_DESIGN_INFO_FACTORY(rval); |
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model = AS_DESIGN_INFO_MODEL(rval); |
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rval = as3645a_read(flash, AS_VERSION_CONTROL_REG); |
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if (rval < 0) { |
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dev_err(dev, "can't read version control reg\n"); |
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return rval; |
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} |
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rfu = AS_VERSION_CONTROL_RFU(rval); |
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version = AS_VERSION_CONTROL_VERSION(rval); |
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/* Verify the chip model and version. */ |
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if (model != 0x01 || rfu != 0x00) { |
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dev_err(dev, "AS3645A not detected (model %d rfu %d)\n", |
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model, rfu); |
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return -ENODEV; |
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} |
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switch (man) { |
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case 1: |
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vendor = "AMS, Austria Micro Systems"; |
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break; |
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case 2: |
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vendor = "ADI, Analog Devices Inc."; |
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break; |
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case 3: |
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vendor = "NSC, National Semiconductor"; |
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break; |
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case 4: |
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vendor = "NXP"; |
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break; |
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case 5: |
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vendor = "TI, Texas Instrument"; |
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break; |
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default: |
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vendor = "Unknown"; |
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} |
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dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor, |
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man, version); |
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rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE); |
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if (rval < 0) |
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return rval; |
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return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE); |
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} |
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static int as3645a_parse_node(struct as3645a *flash, |
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struct fwnode_handle *fwnode) |
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{ |
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struct as3645a_config *cfg = &flash->cfg; |
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struct fwnode_handle *child; |
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int rval; |
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fwnode_for_each_child_node(fwnode, child) { |
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u32 id = 0; |
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fwnode_property_read_u32(child, "reg", &id); |
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switch (id) { |
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case AS_LED_FLASH: |
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flash->flash_node = child; |
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fwnode_handle_get(child); |
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break; |
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case AS_LED_INDICATOR: |
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flash->indicator_node = child; |
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fwnode_handle_get(child); |
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break; |
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default: |
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dev_warn(&flash->client->dev, |
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"unknown LED %u encountered, ignoring\n", id); |
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break; |
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} |
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} |
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if (!flash->flash_node) { |
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dev_err(&flash->client->dev, "can't find flash node\n"); |
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return -ENODEV; |
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} |
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rval = fwnode_property_read_u32(flash->flash_node, "flash-timeout-us", |
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&cfg->flash_timeout_us); |
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if (rval < 0) { |
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dev_err(&flash->client->dev, |
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"can't read flash-timeout-us property for flash\n"); |
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goto out_err; |
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} |
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rval = fwnode_property_read_u32(flash->flash_node, "flash-max-microamp", |
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&cfg->flash_max_ua); |
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if (rval < 0) { |
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dev_err(&flash->client->dev, |
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"can't read flash-max-microamp property for flash\n"); |
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goto out_err; |
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} |
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rval = fwnode_property_read_u32(flash->flash_node, "led-max-microamp", |
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&cfg->assist_max_ua); |
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if (rval < 0) { |
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dev_err(&flash->client->dev, |
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"can't read led-max-microamp property for flash\n"); |
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goto out_err; |
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} |
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|
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fwnode_property_read_u32(flash->flash_node, "voltage-reference", |
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&cfg->voltage_reference); |
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fwnode_property_read_u32(flash->flash_node, "ams,input-max-microamp", |
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&cfg->peak); |
|
cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak); |
|
|
|
if (!flash->indicator_node) { |
|
dev_warn(&flash->client->dev, |
|
"can't find indicator node\n"); |
|
goto out_err; |
|
} |
|
|
|
|
|
rval = fwnode_property_read_u32(flash->indicator_node, |
|
"led-max-microamp", |
|
&cfg->indicator_max_ua); |
|
if (rval < 0) { |
|
dev_err(&flash->client->dev, |
|
"can't read led-max-microamp property for indicator\n"); |
|
goto out_err; |
|
} |
|
|
|
return 0; |
|
|
|
out_err: |
|
fwnode_handle_put(flash->flash_node); |
|
fwnode_handle_put(flash->indicator_node); |
|
|
|
return rval; |
|
} |
|
|
|
static int as3645a_led_class_setup(struct as3645a *flash) |
|
{ |
|
struct led_classdev *fled_cdev = &flash->fled.led_cdev; |
|
struct led_classdev *iled_cdev = &flash->iled_cdev; |
|
struct led_init_data init_data = {}; |
|
struct led_flash_setting *cfg; |
|
int rval; |
|
|
|
iled_cdev->brightness_set_blocking = as3645a_set_indicator_brightness; |
|
iled_cdev->max_brightness = |
|
flash->cfg.indicator_max_ua / AS_INDICATOR_INTENSITY_STEP; |
|
iled_cdev->flags = LED_CORE_SUSPENDRESUME; |
|
|
|
init_data.fwnode = flash->indicator_node; |
|
init_data.devicename = AS_NAME; |
|
init_data.default_label = "indicator"; |
|
|
|
rval = led_classdev_register_ext(&flash->client->dev, iled_cdev, |
|
&init_data); |
|
if (rval < 0) |
|
return rval; |
|
|
|
cfg = &flash->fled.brightness; |
|
cfg->min = AS_FLASH_INTENSITY_MIN; |
|
cfg->max = flash->cfg.flash_max_ua; |
|
cfg->step = AS_FLASH_INTENSITY_STEP; |
|
cfg->val = flash->cfg.flash_max_ua; |
|
|
|
cfg = &flash->fled.timeout; |
|
cfg->min = AS_FLASH_TIMEOUT_MIN; |
|
cfg->max = flash->cfg.flash_timeout_us; |
|
cfg->step = AS_FLASH_TIMEOUT_STEP; |
|
cfg->val = flash->cfg.flash_timeout_us; |
|
|
|
flash->fled.ops = &as3645a_led_flash_ops; |
|
|
|
fled_cdev->brightness_set_blocking = as3645a_set_assist_brightness; |
|
/* Value 0 is off in LED class. */ |
|
fled_cdev->max_brightness = |
|
as3645a_current_to_reg(flash, false, |
|
flash->cfg.assist_max_ua) + 1; |
|
fled_cdev->flags = LED_DEV_CAP_FLASH | LED_CORE_SUSPENDRESUME; |
|
|
|
init_data.fwnode = flash->flash_node; |
|
init_data.devicename = AS_NAME; |
|
init_data.default_label = "flash"; |
|
|
|
rval = led_classdev_flash_register_ext(&flash->client->dev, |
|
&flash->fled, &init_data); |
|
if (rval) |
|
goto out_err; |
|
|
|
return rval; |
|
|
|
out_err: |
|
led_classdev_unregister(iled_cdev); |
|
dev_err(&flash->client->dev, |
|
"led_classdev_flash_register() failed, error %d\n", |
|
rval); |
|
return rval; |
|
} |
|
|
|
static int as3645a_v4l2_setup(struct as3645a *flash) |
|
{ |
|
struct led_classdev_flash *fled = &flash->fled; |
|
struct led_classdev *led = &fled->led_cdev; |
|
struct v4l2_flash_config cfg = { |
|
.intensity = { |
|
.min = AS_TORCH_INTENSITY_MIN, |
|
.max = flash->cfg.assist_max_ua, |
|
.step = AS_TORCH_INTENSITY_STEP, |
|
.val = flash->cfg.assist_max_ua, |
|
}, |
|
}; |
|
struct v4l2_flash_config cfgind = { |
|
.intensity = { |
|
.min = AS_INDICATOR_INTENSITY_MIN, |
|
.max = flash->cfg.indicator_max_ua, |
|
.step = AS_INDICATOR_INTENSITY_STEP, |
|
.val = flash->cfg.indicator_max_ua, |
|
}, |
|
}; |
|
|
|
strlcpy(cfg.dev_name, led->dev->kobj.name, sizeof(cfg.dev_name)); |
|
strlcpy(cfgind.dev_name, flash->iled_cdev.dev->kobj.name, |
|
sizeof(cfgind.dev_name)); |
|
|
|
flash->vf = v4l2_flash_init( |
|
&flash->client->dev, flash->flash_node, &flash->fled, NULL, |
|
&cfg); |
|
if (IS_ERR(flash->vf)) |
|
return PTR_ERR(flash->vf); |
|
|
|
flash->vfind = v4l2_flash_indicator_init( |
|
&flash->client->dev, flash->indicator_node, &flash->iled_cdev, |
|
&cfgind); |
|
if (IS_ERR(flash->vfind)) { |
|
v4l2_flash_release(flash->vf); |
|
return PTR_ERR(flash->vfind); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int as3645a_probe(struct i2c_client *client) |
|
{ |
|
struct as3645a *flash; |
|
int rval; |
|
|
|
if (!dev_fwnode(&client->dev)) |
|
return -ENODEV; |
|
|
|
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL); |
|
if (flash == NULL) |
|
return -ENOMEM; |
|
|
|
flash->client = client; |
|
|
|
rval = as3645a_parse_node(flash, dev_fwnode(&client->dev)); |
|
if (rval < 0) |
|
return rval; |
|
|
|
rval = as3645a_detect(flash); |
|
if (rval < 0) |
|
goto out_put_nodes; |
|
|
|
mutex_init(&flash->mutex); |
|
i2c_set_clientdata(client, flash); |
|
|
|
rval = as3645a_setup(flash); |
|
if (rval) |
|
goto out_mutex_destroy; |
|
|
|
rval = as3645a_led_class_setup(flash); |
|
if (rval) |
|
goto out_mutex_destroy; |
|
|
|
rval = as3645a_v4l2_setup(flash); |
|
if (rval) |
|
goto out_led_classdev_flash_unregister; |
|
|
|
return 0; |
|
|
|
out_led_classdev_flash_unregister: |
|
led_classdev_flash_unregister(&flash->fled); |
|
|
|
out_mutex_destroy: |
|
mutex_destroy(&flash->mutex); |
|
|
|
out_put_nodes: |
|
fwnode_handle_put(flash->flash_node); |
|
fwnode_handle_put(flash->indicator_node); |
|
|
|
return rval; |
|
} |
|
|
|
static int as3645a_remove(struct i2c_client *client) |
|
{ |
|
struct as3645a *flash = i2c_get_clientdata(client); |
|
|
|
as3645a_set_control(flash, AS_MODE_EXT_TORCH, false); |
|
|
|
v4l2_flash_release(flash->vf); |
|
v4l2_flash_release(flash->vfind); |
|
|
|
led_classdev_flash_unregister(&flash->fled); |
|
led_classdev_unregister(&flash->iled_cdev); |
|
|
|
mutex_destroy(&flash->mutex); |
|
|
|
fwnode_handle_put(flash->flash_node); |
|
fwnode_handle_put(flash->indicator_node); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct i2c_device_id as3645a_id_table[] = { |
|
{ AS_NAME, 0 }, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, as3645a_id_table); |
|
|
|
static const struct of_device_id as3645a_of_table[] = { |
|
{ .compatible = "ams,as3645a" }, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(of, as3645a_of_table); |
|
|
|
static struct i2c_driver as3645a_i2c_driver = { |
|
.driver = { |
|
.of_match_table = as3645a_of_table, |
|
.name = AS_NAME, |
|
}, |
|
.probe_new = as3645a_probe, |
|
.remove = as3645a_remove, |
|
.id_table = as3645a_id_table, |
|
}; |
|
|
|
module_i2c_driver(as3645a_i2c_driver); |
|
|
|
MODULE_AUTHOR("Laurent Pinchart <[email protected]>"); |
|
MODULE_AUTHOR("Sakari Ailus <[email protected]>"); |
|
MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones"); |
|
MODULE_LICENSE("GPL v2");
|
|
|