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leds: Add mt6360 driver
Add MT6360 LED driver include 2-channel Flash LED with torch/strobe mode, 3-channel RGB LED support Register/Flash/Breath Mode, and 1-channel for moonlight LED. Signed-off-by: Gene Chen <gene_chen@richtek.com> Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com> Signed-off-by: Pavel Machek <pavel@ucw.cz>
This commit is contained in:
Gene Chen
Pavel Machek
parent
e05cab34e4
commit
679f865206
@ -48,6 +48,19 @@ config LEDS_MAX77693
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multifunction device. It has build in control for two leds in flash
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and torch mode.
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config LEDS_MT6360
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tristate "LED Support for Mediatek MT6360 PMIC"
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depends on LEDS_CLASS && OF
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depends on LEDS_CLASS_FLASH || !LEDS_CLASS_FLASH
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depends on LEDS_CLASS_MULTICOLOR || !LEDS_CLASS_MULTICOLOR
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depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS
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depends on MFD_MT6360
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help
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This option enables support for dual Flash LED drivers found on
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Mediatek MT6360 PMIC.
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Independent current sources supply for each flash LED support torch
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and strobe mode.
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config LEDS_RT4505
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tristate "LED support for RT4505 flashlight controller"
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depends on I2C && OF
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@ -1,5 +1,6 @@
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# SPDX-License-Identifier: GPL-2.0
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obj-$(CONFIG_LEDS_MT6360) += leds-mt6360.o
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obj-$(CONFIG_LEDS_AAT1290) += leds-aat1290.o
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obj-$(CONFIG_LEDS_AS3645A) += leds-as3645a.o
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obj-$(CONFIG_LEDS_KTD2692) += leds-ktd2692.o
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910
drivers/leds/flash/leds-mt6360.c
Normal file
910
drivers/leds/flash/leds-mt6360.c
Normal file
@ -0,0 +1,910 @@
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/bitops.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/led-class-flash.h>
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#include <linux/led-class-multicolor.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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#include <linux/property.h>
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#include <linux/regmap.h>
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#include <media/v4l2-flash-led-class.h>
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enum {
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MT6360_LED_ISNK1 = 0,
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MT6360_LED_ISNK2,
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MT6360_LED_ISNK3,
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MT6360_LED_ISNKML,
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MT6360_LED_FLASH1,
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MT6360_LED_FLASH2,
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MT6360_MAX_LEDS
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};
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#define MT6360_REG_RGBEN 0x380
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#define MT6360_REG_ISNK(_led_no) (0x381 + (_led_no))
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#define MT6360_ISNK_ENMASK(_led_no) BIT(7 - (_led_no))
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#define MT6360_ISNK_MASK GENMASK(4, 0)
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#define MT6360_CHRINDSEL_MASK BIT(3)
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/* Virtual definition for multicolor */
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#define MT6360_VIRTUAL_MULTICOLOR (MT6360_MAX_LEDS + 1)
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#define MULTICOLOR_NUM_CHANNELS 3
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#define MT6360_REG_FLEDEN 0x37E
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#define MT6360_REG_STRBTO 0x373
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#define MT6360_REG_FLEDBASE(_id) (0x372 + 4 * (_id - MT6360_LED_FLASH1))
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#define MT6360_REG_FLEDISTRB(_id) (MT6360_REG_FLEDBASE(_id) + 2)
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#define MT6360_REG_FLEDITOR(_id) (MT6360_REG_FLEDBASE(_id) + 3)
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#define MT6360_REG_CHGSTAT2 0x3E1
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#define MT6360_REG_FLEDSTAT1 0x3E9
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#define MT6360_ITORCH_MASK GENMASK(4, 0)
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#define MT6360_ISTROBE_MASK GENMASK(6, 0)
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#define MT6360_STRBTO_MASK GENMASK(6, 0)
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#define MT6360_TORCHEN_MASK BIT(3)
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#define MT6360_STROBEN_MASK BIT(2)
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#define MT6360_FLCSEN_MASK(_id) BIT(MT6360_LED_FLASH2 - _id)
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#define MT6360_FLEDCHGVINOVP_MASK BIT(3)
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#define MT6360_FLED1STRBTO_MASK BIT(11)
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#define MT6360_FLED2STRBTO_MASK BIT(10)
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#define MT6360_FLED1STRB_MASK BIT(9)
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#define MT6360_FLED2STRB_MASK BIT(8)
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#define MT6360_FLED1SHORT_MASK BIT(7)
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#define MT6360_FLED2SHORT_MASK BIT(6)
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#define MT6360_FLEDLVF_MASK BIT(3)
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#define MT6360_ISNKRGB_STEPUA 2000
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#define MT6360_ISNKRGB_MAXUA 24000
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#define MT6360_ISNKML_STEPUA 5000
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#define MT6360_ISNKML_MAXUA 150000
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#define MT6360_ITORCH_MINUA 25000
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#define MT6360_ITORCH_STEPUA 12500
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#define MT6360_ITORCH_MAXUA 400000
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#define MT6360_ISTRB_MINUA 50000
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#define MT6360_ISTRB_STEPUA 12500
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#define MT6360_ISTRB_MAXUA 1500000
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#define MT6360_STRBTO_MINUS 64000
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#define MT6360_STRBTO_STEPUS 32000
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#define MT6360_STRBTO_MAXUS 2432000
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#define STATE_OFF 0
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#define STATE_KEEP 1
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#define STATE_ON 2
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struct mt6360_led {
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union {
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struct led_classdev isnk;
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struct led_classdev_mc mc;
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struct led_classdev_flash flash;
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};
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struct v4l2_flash *v4l2_flash;
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struct mt6360_priv *priv;
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u32 led_no;
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u32 default_state;
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};
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struct mt6360_priv {
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struct device *dev;
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struct regmap *regmap;
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struct mutex lock;
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unsigned int fled_strobe_used;
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unsigned int fled_torch_used;
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unsigned int leds_active;
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unsigned int leds_count;
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struct mt6360_led leds[];
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};
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static int mt6360_mc_brightness_set(struct led_classdev *lcdev,
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enum led_brightness level)
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{
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struct led_classdev_mc *mccdev = lcdev_to_mccdev(lcdev);
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struct mt6360_led *led = container_of(mccdev, struct mt6360_led, mc);
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struct mt6360_priv *priv = led->priv;
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u32 real_bright, enable_mask = 0, enable = 0;
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int i, ret;
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mutex_lock(&priv->lock);
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led_mc_calc_color_components(mccdev, level);
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for (i = 0; i < mccdev->num_colors; i++) {
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struct mc_subled *subled = mccdev->subled_info + i;
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real_bright = min(lcdev->max_brightness, subled->brightness);
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ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(i),
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MT6360_ISNK_MASK, real_bright);
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if (ret)
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goto out;
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enable_mask |= MT6360_ISNK_ENMASK(subled->channel);
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if (real_bright)
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enable |= MT6360_ISNK_ENMASK(subled->channel);
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}
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ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask,
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enable);
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out:
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mutex_unlock(&priv->lock);
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return ret;
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}
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static int mt6360_isnk_brightness_set(struct led_classdev *lcdev,
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enum led_brightness level)
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{
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struct mt6360_led *led = container_of(lcdev, struct mt6360_led, isnk);
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struct mt6360_priv *priv = led->priv;
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u32 enable_mask = MT6360_ISNK_ENMASK(led->led_no);
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u32 val = level ? MT6360_ISNK_ENMASK(led->led_no) : 0;
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int ret;
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mutex_lock(&priv->lock);
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ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(led->led_no),
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MT6360_ISNK_MASK, level);
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if (ret)
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goto out;
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ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask,
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val);
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out:
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mutex_unlock(&priv->lock);
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return ret;
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}
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static int mt6360_torch_brightness_set(struct led_classdev *lcdev,
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enum led_brightness level)
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{
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struct mt6360_led *led =
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container_of(lcdev, struct mt6360_led, flash.led_cdev);
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struct mt6360_priv *priv = led->priv;
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u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
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u32 val = level ? MT6360_FLCSEN_MASK(led->led_no) : 0;
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u32 prev = priv->fled_torch_used, curr;
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int ret;
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mutex_lock(&priv->lock);
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/*
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* Only one set of flash control logic, use the flag to avoid strobe is
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* currently used.
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*/
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if (priv->fled_strobe_used) {
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dev_warn(lcdev->dev, "Please disable strobe first [%d]\n",
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priv->fled_strobe_used);
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ret = -EBUSY;
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goto unlock;
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}
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if (level)
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curr = prev | BIT(led->led_no);
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else
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curr = prev & ~BIT(led->led_no);
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if (curr)
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val |= MT6360_TORCHEN_MASK;
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if (level) {
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ret = regmap_update_bits(priv->regmap,
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MT6360_REG_FLEDITOR(led->led_no),
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MT6360_ITORCH_MASK, level - 1);
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if (ret)
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goto unlock;
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}
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ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask,
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val);
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if (ret)
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goto unlock;
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priv->fled_torch_used = curr;
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unlock:
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mutex_unlock(&priv->lock);
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return ret;
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}
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static int mt6360_flash_brightness_set(struct led_classdev_flash *fl_cdev,
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u32 brightness)
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{
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/*
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* Due to the current spike when turning on flash, let brightness to be
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* kept by framework.
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* This empty function is used to prevent led_classdev_flash register
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* ops check failure.
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*/
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return 0;
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}
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static int _mt6360_flash_brightness_set(struct led_classdev_flash *fl_cdev,
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u32 brightness)
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{
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struct mt6360_led *led =
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container_of(fl_cdev, struct mt6360_led, flash);
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struct mt6360_priv *priv = led->priv;
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struct led_flash_setting *s = &fl_cdev->brightness;
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u32 val = (brightness - s->min) / s->step;
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return regmap_update_bits(priv->regmap,
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MT6360_REG_FLEDISTRB(led->led_no),
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MT6360_ISTROBE_MASK, val);
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}
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static int mt6360_strobe_set(struct led_classdev_flash *fl_cdev, bool state)
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{
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struct mt6360_led *led =
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container_of(fl_cdev, struct mt6360_led, flash);
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struct mt6360_priv *priv = led->priv;
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struct led_classdev *lcdev = &fl_cdev->led_cdev;
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struct led_flash_setting *s = &fl_cdev->brightness;
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u32 enable_mask = MT6360_STROBEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
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u32 val = state ? MT6360_FLCSEN_MASK(led->led_no) : 0;
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u32 prev = priv->fled_strobe_used, curr;
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int ret;
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mutex_lock(&priv->lock);
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/*
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* Only one set of flash control logic, use the flag to avoid torch is
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* currently used
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*/
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if (priv->fled_torch_used) {
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dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n",
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priv->fled_torch_used);
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ret = -EBUSY;
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goto unlock;
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}
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if (state)
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curr = prev | BIT(led->led_no);
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else
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curr = prev & ~BIT(led->led_no);
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if (curr)
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val |= MT6360_STROBEN_MASK;
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ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask,
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val);
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if (ret) {
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dev_err(lcdev->dev, "[%d] control current source %d fail\n",
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led->led_no, state);
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goto unlock;
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}
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/*
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* If the flash need to be on, config the flash current ramping up to
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* the setting value.
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* Else, always recover back to the minimum one
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*/
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ret = _mt6360_flash_brightness_set(fl_cdev, state ? s->val : s->min);
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if (ret)
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goto unlock;
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/*
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* For the flash turn on/off, HW rampping up/down time is 5ms/500us,
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* respectively.
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*/
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if (!prev && curr)
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usleep_range(5000, 6000);
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else if (prev && !curr)
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udelay(500);
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priv->fled_strobe_used = curr;
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unlock:
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mutex_unlock(&priv->lock);
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return ret;
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}
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static int mt6360_strobe_get(struct led_classdev_flash *fl_cdev, bool *state)
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{
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struct mt6360_led *led =
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container_of(fl_cdev, struct mt6360_led, flash);
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struct mt6360_priv *priv = led->priv;
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mutex_lock(&priv->lock);
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*state = !!(priv->fled_strobe_used & BIT(led->led_no));
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mutex_unlock(&priv->lock);
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return 0;
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}
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static int mt6360_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout)
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{
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struct mt6360_led *led =
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container_of(fl_cdev, struct mt6360_led, flash);
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struct mt6360_priv *priv = led->priv;
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struct led_flash_setting *s = &fl_cdev->timeout;
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u32 val = (timeout - s->min) / s->step;
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int ret;
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mutex_lock(&priv->lock);
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ret = regmap_update_bits(priv->regmap, MT6360_REG_STRBTO,
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MT6360_STRBTO_MASK, val);
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mutex_unlock(&priv->lock);
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return ret;
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}
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static int mt6360_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault)
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{
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struct mt6360_led *led =
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container_of(fl_cdev, struct mt6360_led, flash);
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struct mt6360_priv *priv = led->priv;
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u16 fled_stat;
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unsigned int chg_stat, strobe_timeout_mask, fled_short_mask;
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u32 rfault = 0;
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int ret;
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mutex_lock(&priv->lock);
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ret = regmap_read(priv->regmap, MT6360_REG_CHGSTAT2, &chg_stat);
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if (ret)
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goto unlock;
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ret = regmap_raw_read(priv->regmap, MT6360_REG_FLEDSTAT1, &fled_stat,
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sizeof(fled_stat));
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if (ret)
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goto unlock;
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if (led->led_no == MT6360_LED_FLASH1) {
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strobe_timeout_mask = MT6360_FLED1STRBTO_MASK;
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fled_short_mask = MT6360_FLED1SHORT_MASK;
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} else {
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strobe_timeout_mask = MT6360_FLED2STRBTO_MASK;
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fled_short_mask = MT6360_FLED2SHORT_MASK;
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}
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if (chg_stat & MT6360_FLEDCHGVINOVP_MASK)
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rfault |= LED_FAULT_INPUT_VOLTAGE;
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if (fled_stat & strobe_timeout_mask)
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rfault |= LED_FAULT_TIMEOUT;
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if (fled_stat & fled_short_mask)
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rfault |= LED_FAULT_SHORT_CIRCUIT;
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if (fled_stat & MT6360_FLEDLVF_MASK)
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rfault |= LED_FAULT_UNDER_VOLTAGE;
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*fault = rfault;
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unlock:
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mutex_unlock(&priv->lock);
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return ret;
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}
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static const struct led_flash_ops mt6360_flash_ops = {
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.flash_brightness_set = mt6360_flash_brightness_set,
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.strobe_set = mt6360_strobe_set,
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.strobe_get = mt6360_strobe_get,
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.timeout_set = mt6360_timeout_set,
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.fault_get = mt6360_fault_get,
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};
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static int mt6360_isnk_init_default_state(struct mt6360_led *led)
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{
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struct mt6360_priv *priv = led->priv;
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unsigned int regval;
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u32 level;
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int ret;
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ret = regmap_read(priv->regmap, MT6360_REG_ISNK(led->led_no), ®val);
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if (ret)
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return ret;
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level = regval & MT6360_ISNK_MASK;
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ret = regmap_read(priv->regmap, MT6360_REG_RGBEN, ®val);
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if (ret)
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return ret;
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if (!(regval & MT6360_ISNK_ENMASK(led->led_no)))
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level = LED_OFF;
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switch (led->default_state) {
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case STATE_ON:
|
||||
led->isnk.brightness = led->isnk.max_brightness;
|
||||
break;
|
||||
case STATE_KEEP:
|
||||
led->isnk.brightness = min(level, led->isnk.max_brightness);
|
||||
break;
|
||||
default:
|
||||
led->isnk.brightness = LED_OFF;
|
||||
}
|
||||
|
||||
return mt6360_isnk_brightness_set(&led->isnk, led->isnk.brightness);
|
||||
}
|
||||
|
||||
static int mt6360_flash_init_default_state(struct mt6360_led *led)
|
||||
{
|
||||
struct led_classdev_flash *flash = &led->flash;
|
||||
struct mt6360_priv *priv = led->priv;
|
||||
u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no);
|
||||
u32 level;
|
||||
unsigned int regval;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(priv->regmap, MT6360_REG_FLEDITOR(led->led_no),
|
||||
®val);
|
||||
if (ret)
|
||||
return ret;
|
||||
level = regval & MT6360_ITORCH_MASK;
|
||||
|
||||
ret = regmap_read(priv->regmap, MT6360_REG_FLEDEN, ®val);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
if ((regval & enable_mask) == enable_mask)
|
||||
level += 1;
|
||||
else
|
||||
level = LED_OFF;
|
||||
|
||||
switch (led->default_state) {
|
||||
case STATE_ON:
|
||||
flash->led_cdev.brightness = flash->led_cdev.max_brightness;
|
||||
break;
|
||||
case STATE_KEEP:
|
||||
flash->led_cdev.brightness =
|
||||
min(level, flash->led_cdev.max_brightness);
|
||||
break;
|
||||
default:
|
||||
flash->led_cdev.brightness = LED_OFF;
|
||||
}
|
||||
|
||||
return mt6360_torch_brightness_set(&flash->led_cdev,
|
||||
flash->led_cdev.brightness);
|
||||
}
|
||||
|
||||
#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS)
|
||||
static int mt6360_flash_external_strobe_set(struct v4l2_flash *v4l2_flash,
|
||||
bool enable)
|
||||
{
|
||||
struct led_classdev_flash *flash = v4l2_flash->fled_cdev;
|
||||
struct mt6360_led *led = container_of(flash, struct mt6360_led, flash);
|
||||
struct mt6360_priv *priv = led->priv;
|
||||
u32 mask = MT6360_FLCSEN_MASK(led->led_no);
|
||||
u32 val = enable ? mask : 0;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&priv->lock);
|
||||
|
||||
ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, mask, val);
|
||||
if (ret)
|
||||
goto unlock;
|
||||
|
||||
if (enable)
|
||||
priv->fled_strobe_used |= BIT(led->led_no);
|
||||
else
|
||||
priv->fled_strobe_used &= ~BIT(led->led_no);
|
||||
|
||||
unlock:
|
||||
mutex_unlock(&priv->lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct v4l2_flash_ops v4l2_flash_ops = {
|
||||
.external_strobe_set = mt6360_flash_external_strobe_set,
|
||||
};
|
||||
|
||||
static void mt6360_init_v4l2_flash_config(struct mt6360_led *led,
|
||||
struct v4l2_flash_config *config)
|
||||
{
|
||||
struct led_classdev *lcdev;
|
||||
struct led_flash_setting *s = &config->intensity;
|
||||
|
||||
lcdev = &led->flash.led_cdev;
|
||||
|
||||
s->min = MT6360_ITORCH_MINUA;
|
||||
s->step = MT6360_ITORCH_STEPUA;
|
||||
s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step;
|
||||
|
||||
config->has_external_strobe = 1;
|
||||
strscpy(config->dev_name, lcdev->dev->kobj.name,
|
||||
sizeof(config->dev_name));
|
||||
|
||||
config->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT |
|
||||
LED_FAULT_INPUT_VOLTAGE |
|
||||
LED_FAULT_UNDER_VOLTAGE;
|
||||
}
|
||||
#else
|
||||
static const struct v4l2_flash_ops v4l2_flash_ops;
|
||||
static void mt6360_init_v4l2_flash_config(struct mt6360_led *led,
|
||||
struct v4l2_flash_config *config)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
static int mt6360_led_register(struct device *parent, struct mt6360_led *led,
|
||||
struct led_init_data *init_data)
|
||||
{
|
||||
struct mt6360_priv *priv = led->priv;
|
||||
struct v4l2_flash_config v4l2_config = {0};
|
||||
int ret;
|
||||
|
||||
if ((led->led_no == MT6360_LED_ISNK1 ||
|
||||
led->led_no == MT6360_VIRTUAL_MULTICOLOR) &&
|
||||
(priv->leds_active & BIT(MT6360_LED_ISNK1))) {
|
||||
/*
|
||||
* Change isink1 to SW control mode, disconnect it with
|
||||
* charger state
|
||||
*/
|
||||
ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN,
|
||||
MT6360_CHRINDSEL_MASK,
|
||||
MT6360_CHRINDSEL_MASK);
|
||||
if (ret) {
|
||||
dev_err(parent, "Failed to config ISNK1 to SW mode\n");
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
switch (led->led_no) {
|
||||
case MT6360_VIRTUAL_MULTICOLOR:
|
||||
ret = mt6360_mc_brightness_set(&led->mc.led_cdev, LED_OFF);
|
||||
if (ret) {
|
||||
dev_err(parent,
|
||||
"Failed to init multicolor brightness\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = devm_led_classdev_multicolor_register_ext(parent,
|
||||
&led->mc, init_data);
|
||||
if (ret) {
|
||||
dev_err(parent, "Couldn't register multicolor\n");
|
||||
return ret;
|
||||
}
|
||||
break;
|
||||
case MT6360_LED_ISNK1 ... MT6360_LED_ISNKML:
|
||||
ret = mt6360_isnk_init_default_state(led);
|
||||
if (ret) {
|
||||
dev_err(parent, "Failed to init %d isnk state\n",
|
||||
led->led_no);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = devm_led_classdev_register_ext(parent, &led->isnk,
|
||||
init_data);
|
||||
if (ret) {
|
||||
dev_err(parent, "Couldn't register isink %d\n",
|
||||
led->led_no);
|
||||
return ret;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
ret = mt6360_flash_init_default_state(led);
|
||||
if (ret) {
|
||||
dev_err(parent, "Failed to init %d flash state\n",
|
||||
led->led_no);
|
||||
return ret;
|
||||
}
|
||||
|
||||
ret = devm_led_classdev_flash_register_ext(parent, &led->flash,
|
||||
init_data);
|
||||
if (ret) {
|
||||
dev_err(parent, "Couldn't register flash %d\n",
|
||||
led->led_no);
|
||||
return ret;
|
||||
}
|
||||
|
||||
mt6360_init_v4l2_flash_config(led, &v4l2_config);
|
||||
led->v4l2_flash = v4l2_flash_init(parent, init_data->fwnode,
|
||||
&led->flash,
|
||||
&v4l2_flash_ops,
|
||||
&v4l2_config);
|
||||
if (IS_ERR(led->v4l2_flash)) {
|
||||
dev_err(parent, "Failed to register %d v4l2 sd\n",
|
||||
led->led_no);
|
||||
return PTR_ERR(led->v4l2_flash);
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static u32 clamp_align(u32 val, u32 min, u32 max, u32 step)
|
||||
{
|
||||
u32 retval;
|
||||
|
||||
retval = clamp_val(val, min, max);
|
||||
if (step > 1)
|
||||
retval = rounddown(retval - min, step) + min;
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int mt6360_init_isnk_properties(struct mt6360_led *led,
|
||||
struct led_init_data *init_data)
|
||||
{
|
||||
struct led_classdev *lcdev;
|
||||
struct mt6360_priv *priv = led->priv;
|
||||
struct fwnode_handle *child;
|
||||
u32 step_uA = MT6360_ISNKRGB_STEPUA, max_uA = MT6360_ISNKRGB_MAXUA;
|
||||
u32 val;
|
||||
int num_color = 0, ret;
|
||||
|
||||
if (led->led_no == MT6360_VIRTUAL_MULTICOLOR) {
|
||||
struct mc_subled *sub_led;
|
||||
|
||||
sub_led = devm_kzalloc(priv->dev,
|
||||
sizeof(*sub_led) * MULTICOLOR_NUM_CHANNELS, GFP_KERNEL);
|
||||
if (!sub_led)
|
||||
return -ENOMEM;
|
||||
|
||||
fwnode_for_each_child_node(init_data->fwnode, child) {
|
||||
u32 reg, color;
|
||||
|
||||
ret = fwnode_property_read_u32(child, "reg", ®);
|
||||
if (ret || reg > MT6360_LED_ISNK3 ||
|
||||
priv->leds_active & BIT(reg))
|
||||
return -EINVAL;
|
||||
|
||||
ret = fwnode_property_read_u32(child, "color", &color);
|
||||
if (ret) {
|
||||
dev_err(priv->dev,
|
||||
"led %d, no color specified\n",
|
||||
led->led_no);
|
||||
return ret;
|
||||
}
|
||||
|
||||
priv->leds_active |= BIT(reg);
|
||||
sub_led[num_color].color_index = color;
|
||||
sub_led[num_color].channel = reg;
|
||||
num_color++;
|
||||
}
|
||||
|
||||
if (num_color < 2) {
|
||||
dev_err(priv->dev,
|
||||
"Multicolor must include 2 or more led channel\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
led->mc.num_colors = num_color;
|
||||
led->mc.subled_info = sub_led;
|
||||
|
||||
lcdev = &led->mc.led_cdev;
|
||||
lcdev->brightness_set_blocking = mt6360_mc_brightness_set;
|
||||
} else {
|
||||
if (led->led_no == MT6360_LED_ISNKML) {
|
||||
step_uA = MT6360_ISNKML_STEPUA;
|
||||
max_uA = MT6360_ISNKML_MAXUA;
|
||||
}
|
||||
|
||||
lcdev = &led->isnk;
|
||||
lcdev->brightness_set_blocking = mt6360_isnk_brightness_set;
|
||||
}
|
||||
|
||||
ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
|
||||
&val);
|
||||
if (ret) {
|
||||
dev_warn(priv->dev,
|
||||
"Not specified led-max-microamp, config to the minimum\n");
|
||||
val = step_uA;
|
||||
} else
|
||||
val = clamp_align(val, 0, max_uA, step_uA);
|
||||
|
||||
lcdev->max_brightness = val / step_uA;
|
||||
|
||||
fwnode_property_read_string(init_data->fwnode, "linux,default-trigger",
|
||||
&lcdev->default_trigger);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6360_init_flash_properties(struct mt6360_led *led,
|
||||
struct led_init_data *init_data)
|
||||
{
|
||||
struct led_classdev_flash *flash = &led->flash;
|
||||
struct led_classdev *lcdev = &flash->led_cdev;
|
||||
struct mt6360_priv *priv = led->priv;
|
||||
struct led_flash_setting *s;
|
||||
u32 val;
|
||||
int ret;
|
||||
|
||||
ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp",
|
||||
&val);
|
||||
if (ret) {
|
||||
dev_warn(priv->dev,
|
||||
"Not specified led-max-microamp, config to the minimum\n");
|
||||
val = MT6360_ITORCH_MINUA;
|
||||
} else
|
||||
val = clamp_align(val, MT6360_ITORCH_MINUA, MT6360_ITORCH_MAXUA,
|
||||
MT6360_ITORCH_STEPUA);
|
||||
|
||||
lcdev->max_brightness =
|
||||
(val - MT6360_ITORCH_MINUA) / MT6360_ITORCH_STEPUA + 1;
|
||||
lcdev->brightness_set_blocking = mt6360_torch_brightness_set;
|
||||
lcdev->flags |= LED_DEV_CAP_FLASH;
|
||||
|
||||
ret = fwnode_property_read_u32(init_data->fwnode, "flash-max-microamp",
|
||||
&val);
|
||||
if (ret) {
|
||||
dev_warn(priv->dev,
|
||||
"Not specified flash-max-microamp, config to the minimum\n");
|
||||
val = MT6360_ISTRB_MINUA;
|
||||
} else
|
||||
val = clamp_align(val, MT6360_ISTRB_MINUA, MT6360_ISTRB_MAXUA,
|
||||
MT6360_ISTRB_STEPUA);
|
||||
|
||||
s = &flash->brightness;
|
||||
s->min = MT6360_ISTRB_MINUA;
|
||||
s->step = MT6360_ISTRB_STEPUA;
|
||||
s->val = s->max = val;
|
||||
|
||||
/*
|
||||
* Always configure as min level when off to prevent flash current
|
||||
* spike.
|
||||
*/
|
||||
ret = _mt6360_flash_brightness_set(flash, s->min);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
ret = fwnode_property_read_u32(init_data->fwnode,
|
||||
"flash-max-timeout-us", &val);
|
||||
if (ret) {
|
||||
dev_warn(priv->dev,
|
||||
"Not specified flash-max-timeout-us, config to the minimum\n");
|
||||
val = MT6360_STRBTO_MINUS;
|
||||
} else
|
||||
val = clamp_align(val, MT6360_STRBTO_MINUS, MT6360_STRBTO_MAXUS,
|
||||
MT6360_STRBTO_STEPUS);
|
||||
|
||||
s = &flash->timeout;
|
||||
s->min = MT6360_STRBTO_MINUS;
|
||||
s->step = MT6360_STRBTO_STEPUS;
|
||||
s->val = s->max = val;
|
||||
|
||||
flash->ops = &mt6360_flash_ops;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mt6360_init_common_properties(struct mt6360_led *led,
|
||||
struct led_init_data *init_data)
|
||||
{
|
||||
const char *const states[] = { "off", "keep", "on" };
|
||||
const char *str;
|
||||
int ret;
|
||||
|
||||
if (!fwnode_property_read_string(init_data->fwnode,
|
||||
"default-state", &str)) {
|
||||
ret = match_string(states, ARRAY_SIZE(states), str);
|
||||
if (ret < 0)
|
||||
ret = STATE_OFF;
|
||||
|
||||
led->default_state = ret;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void mt6360_v4l2_flash_release(struct mt6360_priv *priv)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < priv->leds_count; i++) {
|
||||
struct mt6360_led *led = priv->leds + i;
|
||||
|
||||
if (led->v4l2_flash)
|
||||
v4l2_flash_release(led->v4l2_flash);
|
||||
}
|
||||
}
|
||||
|
||||
static int mt6360_led_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct mt6360_priv *priv;
|
||||
struct fwnode_handle *child;
|
||||
size_t count;
|
||||
int i = 0, ret;
|
||||
|
||||
count = device_get_child_node_count(&pdev->dev);
|
||||
if (!count || count > MT6360_MAX_LEDS) {
|
||||
dev_err(&pdev->dev,
|
||||
"No child node or node count over max led number %zu\n",
|
||||
count);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
priv = devm_kzalloc(&pdev->dev,
|
||||
struct_size(priv, leds, count), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
priv->leds_count = count;
|
||||
priv->dev = &pdev->dev;
|
||||
mutex_init(&priv->lock);
|
||||
|
||||
priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
||||
if (!priv->regmap) {
|
||||
dev_err(&pdev->dev, "Failed to get parent regmap\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
device_for_each_child_node(&pdev->dev, child) {
|
||||
struct mt6360_led *led = priv->leds + i;
|
||||
struct led_init_data init_data = { .fwnode = child, };
|
||||
u32 reg, led_color;
|
||||
|
||||
ret = fwnode_property_read_u32(child, "color", &led_color);
|
||||
if (ret)
|
||||
goto out_flash_release;
|
||||
|
||||
if (led_color == LED_COLOR_ID_RGB ||
|
||||
led_color == LED_COLOR_ID_MULTI)
|
||||
reg = MT6360_VIRTUAL_MULTICOLOR;
|
||||
else {
|
||||
ret = fwnode_property_read_u32(child, "reg", ®);
|
||||
if (ret)
|
||||
goto out_flash_release;
|
||||
|
||||
if (reg >= MT6360_MAX_LEDS) {
|
||||
ret = -EINVAL;
|
||||
goto out_flash_release;
|
||||
}
|
||||
}
|
||||
|
||||
if (priv->leds_active & BIT(reg)) {
|
||||
ret = -EINVAL;
|
||||
goto out_flash_release;
|
||||
}
|
||||
priv->leds_active |= BIT(reg);
|
||||
|
||||
led->led_no = reg;
|
||||
led->priv = priv;
|
||||
|
||||
ret = mt6360_init_common_properties(led, &init_data);
|
||||
if (ret)
|
||||
goto out_flash_release;
|
||||
|
||||
if (reg == MT6360_VIRTUAL_MULTICOLOR ||
|
||||
reg <= MT6360_LED_ISNKML)
|
||||
ret = mt6360_init_isnk_properties(led, &init_data);
|
||||
else
|
||||
ret = mt6360_init_flash_properties(led, &init_data);
|
||||
|
||||
if (ret)
|
||||
goto out_flash_release;
|
||||
|
||||
ret = mt6360_led_register(&pdev->dev, led, &init_data);
|
||||
if (ret)
|
||||
goto out_flash_release;
|
||||
|
||||
i++;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, priv);
|
||||
return 0;
|
||||
|
||||
out_flash_release:
|
||||
mt6360_v4l2_flash_release(priv);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int mt6360_led_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct mt6360_priv *priv = platform_get_drvdata(pdev);
|
||||
|
||||
mt6360_v4l2_flash_release(priv);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id __maybe_unused mt6360_led_of_id[] = {
|
||||
{ .compatible = "mediatek,mt6360-led", },
|
||||
{}
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, mt6360_led_of_id);
|
||||
|
||||
static struct platform_driver mt6360_led_driver = {
|
||||
.driver = {
|
||||
.name = "mt6360-led",
|
||||
.of_match_table = mt6360_led_of_id,
|
||||
},
|
||||
.probe = mt6360_led_probe,
|
||||
.remove = mt6360_led_remove,
|
||||
};
|
||||
module_platform_driver(mt6360_led_driver);
|
||||
|
||||
MODULE_AUTHOR("Gene Chen <gene_chen@richtek.com>");
|
||||
MODULE_DESCRIPTION("MT6360 LED Driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user