media: leds: as3645a: Add LED flash class driver
Add a LED flash class driver for the as3654a flash controller. A V4L2 flash driver for it already exists (drivers/media/i2c/as3645a.c), and this driver is based on that. Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Sakari Ailus
Mauro Carvalho Chehab
parent
535a218d26
commit
a56ba8fbcb
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@ -2123,6 +2123,12 @@ S: Maintained
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F: arch/arm64/
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F: Documentation/arm64/
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AS3645A LED FLASH CONTROLLER DRIVER
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M: Sakari Ailus <sakari.ailus@iki.fi>
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L: linux-leds@vger.kernel.org
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S: Maintained
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F: drivers/leds/leds-as3645a.c
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AS3645A LED FLASH CONTROLLER DRIVER
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M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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L: linux-media@vger.kernel.org
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@ -58,6 +58,14 @@ config LEDS_AAT1290
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help
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This option enables support for the LEDs on the AAT1290.
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config LEDS_AS3645A
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tristate "AS3645A LED flash controller support"
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depends on I2C && LEDS_CLASS_FLASH
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help
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Enable LED flash class support for AS3645A LED flash
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controller. V4L2 flash API is provided as well if
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CONFIG_V4L2_FLASH_API is enabled.
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config LEDS_BCM6328
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tristate "LED Support for Broadcom BCM6328"
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depends on LEDS_CLASS
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@ -8,6 +8,7 @@ obj-$(CONFIG_LEDS_TRIGGERS) += led-triggers.o
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# LED Platform Drivers
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obj-$(CONFIG_LEDS_88PM860X) += leds-88pm860x.o
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obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o
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obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o
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obj-$(CONFIG_LEDS_BCM6328) += leds-bcm6328.o
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obj-$(CONFIG_LEDS_BCM6358) += leds-bcm6358.o
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obj-$(CONFIG_LEDS_BD2802) += leds-bd2802.o
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@ -0,0 +1,763 @@
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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 <sakari.ailus@iki.fi>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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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/of.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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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_names {
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char flash[32];
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char indicator[32];
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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 device_node *flash_node;
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struct device_node *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, 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);
|
||||
if (rval < 0)
|
||||
return rval;
|
||||
|
||||
rval = as3645a_set_timeout(flash);
|
||||
if (rval < 0)
|
||||
return rval;
|
||||
|
||||
rval = as3645a_set_control(flash, AS_MODE_INDICATOR, false);
|
||||
if (rval < 0)
|
||||
return rval;
|
||||
|
||||
/* read status */
|
||||
rval = as3645a_get_fault(&flash->fled, &fault);
|
||||
if (rval < 0)
|
||||
return rval;
|
||||
|
||||
dev_dbg(dev, "AS_INDICATOR_AND_TIMER_REG: %02x\n",
|
||||
as3645a_read(flash, AS_INDICATOR_AND_TIMER_REG));
|
||||
dev_dbg(dev, "AS_CURRENT_SET_REG: %02x\n",
|
||||
as3645a_read(flash, AS_CURRENT_SET_REG));
|
||||
dev_dbg(dev, "AS_CONTROL_REG: %02x\n",
|
||||
as3645a_read(flash, AS_CONTROL_REG));
|
||||
|
||||
return rval & ~AS_FAULT_INFO_LED_AMOUNT ? -EIO : 0;
|
||||
}
|
||||
|
||||
static int as3645a_detect(struct as3645a *flash)
|
||||
{
|
||||
struct device *dev = &flash->client->dev;
|
||||
int rval, man, model, rfu, version;
|
||||
const char *vendor;
|
||||
|
||||
rval = as3645a_read(flash, AS_DESIGN_INFO_REG);
|
||||
if (rval < 0) {
|
||||
dev_err(dev, "can't read design info reg\n");
|
||||
return rval;
|
||||
}
|
||||
|
||||
man = AS_DESIGN_INFO_FACTORY(rval);
|
||||
model = AS_DESIGN_INFO_MODEL(rval);
|
||||
|
||||
rval = as3645a_read(flash, AS_VERSION_CONTROL_REG);
|
||||
if (rval < 0) {
|
||||
dev_err(dev, "can't read version control reg\n");
|
||||
return rval;
|
||||
}
|
||||
|
||||
rfu = AS_VERSION_CONTROL_RFU(rval);
|
||||
version = AS_VERSION_CONTROL_VERSION(rval);
|
||||
|
||||
/* Verify the chip model and version. */
|
||||
if (model != 0x01 || rfu != 0x00) {
|
||||
dev_err(dev, "AS3645A not detected "
|
||||
"(model %d rfu %d)\n", model, rfu);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
switch (man) {
|
||||
case 1:
|
||||
vendor = "AMS, Austria Micro Systems";
|
||||
break;
|
||||
case 2:
|
||||
vendor = "ADI, Analog Devices Inc.";
|
||||
break;
|
||||
case 3:
|
||||
vendor = "NSC, National Semiconductor";
|
||||
break;
|
||||
case 4:
|
||||
vendor = "NXP";
|
||||
break;
|
||||
case 5:
|
||||
vendor = "TI, Texas Instrument";
|
||||
break;
|
||||
default:
|
||||
vendor = "Unknown";
|
||||
}
|
||||
|
||||
dev_info(dev, "Chip vendor: %s (%d) Version: %d\n", vendor,
|
||||
man, version);
|
||||
|
||||
rval = as3645a_write(flash, AS_PASSWORD_REG, AS_PASSWORD_UNLOCK_VALUE);
|
||||
if (rval < 0)
|
||||
return rval;
|
||||
|
||||
return as3645a_write(flash, AS_BOOST_REG, AS_BOOST_CURRENT_DISABLE);
|
||||
}
|
||||
|
||||
static int as3645a_parse_node(struct as3645a *flash,
|
||||
struct as3645a_names *names,
|
||||
struct device_node *node)
|
||||
{
|
||||
struct as3645a_config *cfg = &flash->cfg;
|
||||
const char *name;
|
||||
int rval;
|
||||
|
||||
flash->flash_node = of_get_child_by_name(node, "flash");
|
||||
if (!flash->flash_node) {
|
||||
dev_err(&flash->client->dev, "can't find flash node\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
rval = of_property_read_string(flash->flash_node, "label", &name);
|
||||
if (!rval)
|
||||
strlcpy(names->flash, name, sizeof(names->flash));
|
||||
else
|
||||
snprintf(names->flash, sizeof(names->flash),
|
||||
"%s:flash", node->name);
|
||||
|
||||
rval = of_property_read_u32(flash->flash_node, "flash-timeout-us",
|
||||
&cfg->flash_timeout_us);
|
||||
if (rval < 0) {
|
||||
dev_err(&flash->client->dev,
|
||||
"can't read flash-timeout-us property for flash\n");
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
rval = of_property_read_u32(flash->flash_node, "flash-max-microamp",
|
||||
&cfg->flash_max_ua);
|
||||
if (rval < 0) {
|
||||
dev_err(&flash->client->dev,
|
||||
"can't read flash-max-microamp property for flash\n");
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
rval = of_property_read_u32(flash->flash_node, "led-max-microamp",
|
||||
&cfg->assist_max_ua);
|
||||
if (rval < 0) {
|
||||
dev_err(&flash->client->dev,
|
||||
"can't read led-max-microamp property for flash\n");
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
of_property_read_u32(flash->flash_node, "voltage-reference",
|
||||
&cfg->voltage_reference);
|
||||
|
||||
of_property_read_u32(flash->flash_node, "peak-current-limit",
|
||||
&cfg->peak);
|
||||
cfg->peak = AS_PEAK_mA_TO_REG(cfg->peak);
|
||||
|
||||
flash->indicator_node = of_get_child_by_name(node, "indicator");
|
||||
if (!flash->indicator_node) {
|
||||
dev_warn(&flash->client->dev,
|
||||
"can't find indicator node\n");
|
||||
goto out_err;
|
||||
}
|
||||
|
||||
rval = of_property_read_string(flash->indicator_node, "label", &name);
|
||||
if (!rval)
|
||||
strlcpy(names->indicator, name, sizeof(names->indicator));
|
||||
else
|
||||
snprintf(names->indicator, sizeof(names->indicator),
|
||||
"%s:indicator", node->name);
|
||||
|
||||
rval = of_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:
|
||||
of_node_put(flash->flash_node);
|
||||
of_node_put(flash->indicator_node);
|
||||
|
||||
return rval;
|
||||
}
|
||||
|
||||
static int as3645a_led_class_setup(struct as3645a *flash,
|
||||
struct as3645a_names *names)
|
||||
{
|
||||
struct led_classdev *fled_cdev = &flash->fled.led_cdev;
|
||||
struct led_classdev *iled_cdev = &flash->iled_cdev;
|
||||
struct led_flash_setting *cfg;
|
||||
int rval;
|
||||
|
||||
iled_cdev->name = names->indicator;
|
||||
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;
|
||||
|
||||
rval = led_classdev_register(&flash->client->dev, iled_cdev);
|
||||
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->name = names->flash;
|
||||
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;
|
||||
|
||||
rval = led_classdev_flash_register(&flash->client->dev, &flash->fled);
|
||||
if (rval) {
|
||||
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->name, sizeof(cfg.dev_name));
|
||||
strlcpy(cfgind.dev_name, flash->iled_cdev.name, sizeof(cfg.dev_name));
|
||||
|
||||
flash->vf = v4l2_flash_init(
|
||||
&flash->client->dev, of_fwnode_handle(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, of_fwnode_handle(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_names names;
|
||||
struct as3645a *flash;
|
||||
int rval;
|
||||
|
||||
if (client->dev.of_node == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
flash = devm_kzalloc(&client->dev, sizeof(*flash), GFP_KERNEL);
|
||||
if (flash == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
flash->client = client;
|
||||
|
||||
rval = as3645a_parse_node(flash, &names, client->dev.of_node);
|
||||
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, &names);
|
||||
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:
|
||||
of_node_put(flash->flash_node);
|
||||
of_node_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);
|
||||
|
||||
led_classdev_flash_unregister(&flash->fled);
|
||||
led_classdev_unregister(&flash->iled_cdev);
|
||||
|
||||
mutex_destroy(&flash->mutex);
|
||||
|
||||
of_node_put(flash->flash_node);
|
||||
of_node_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 <laurent.pinchart@ideasonboard.com>");
|
||||
MODULE_AUTHOR("Sakari Ailus <sakari.ailus@iki.fi>");
|
||||
MODULE_DESCRIPTION("LED flash driver for AS3645A, LM3555 and their clones");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue