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910 lines
22 KiB
910 lines
22 KiB
// 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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|
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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: |
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led->isnk.brightness = led->isnk.max_brightness; |
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break; |
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case STATE_KEEP: |
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led->isnk.brightness = min(level, led->isnk.max_brightness); |
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break; |
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default: |
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led->isnk.brightness = LED_OFF; |
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} |
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return mt6360_isnk_brightness_set(&led->isnk, led->isnk.brightness); |
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} |
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static int mt6360_flash_init_default_state(struct mt6360_led *led) |
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{ |
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struct led_classdev_flash *flash = &led->flash; |
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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 level; |
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unsigned int regval; |
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int ret; |
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ret = regmap_read(priv->regmap, MT6360_REG_FLEDITOR(led->led_no), |
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®val); |
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if (ret) |
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return ret; |
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level = regval & MT6360_ITORCH_MASK; |
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ret = regmap_read(priv->regmap, MT6360_REG_FLEDEN, ®val); |
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if (ret) |
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return ret; |
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if ((regval & enable_mask) == enable_mask) |
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level += 1; |
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else |
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level = LED_OFF; |
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switch (led->default_state) { |
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case STATE_ON: |
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flash->led_cdev.brightness = flash->led_cdev.max_brightness; |
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break; |
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case STATE_KEEP: |
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flash->led_cdev.brightness = |
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min(level, flash->led_cdev.max_brightness); |
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break; |
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default: |
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flash->led_cdev.brightness = LED_OFF; |
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} |
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return mt6360_torch_brightness_set(&flash->led_cdev, |
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flash->led_cdev.brightness); |
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} |
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#if IS_ENABLED(CONFIG_V4L2_FLASH_LED_CLASS) |
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static int mt6360_flash_external_strobe_set(struct v4l2_flash *v4l2_flash, |
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bool enable) |
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{ |
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struct led_classdev_flash *flash = v4l2_flash->fled_cdev; |
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struct mt6360_led *led = container_of(flash, struct mt6360_led, flash); |
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struct mt6360_priv *priv = led->priv; |
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u32 mask = MT6360_FLCSEN_MASK(led->led_no); |
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u32 val = enable ? mask : 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_FLEDEN, mask, val); |
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if (ret) |
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goto unlock; |
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if (enable) |
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priv->fled_strobe_used |= BIT(led->led_no); |
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else |
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priv->fled_strobe_used &= ~BIT(led->led_no); |
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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 v4l2_flash_ops v4l2_flash_ops = { |
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.external_strobe_set = mt6360_flash_external_strobe_set, |
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}; |
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static void mt6360_init_v4l2_flash_config(struct mt6360_led *led, |
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struct v4l2_flash_config *config) |
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{ |
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struct led_classdev *lcdev; |
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struct led_flash_setting *s = &config->intensity; |
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lcdev = &led->flash.led_cdev; |
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s->min = MT6360_ITORCH_MINUA; |
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s->step = MT6360_ITORCH_STEPUA; |
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s->val = s->max = s->min + (lcdev->max_brightness - 1) * s->step; |
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config->has_external_strobe = 1; |
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strscpy(config->dev_name, lcdev->dev->kobj.name, |
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sizeof(config->dev_name)); |
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config->flash_faults = LED_FAULT_SHORT_CIRCUIT | LED_FAULT_TIMEOUT | |
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LED_FAULT_INPUT_VOLTAGE | |
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LED_FAULT_UNDER_VOLTAGE; |
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} |
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#else |
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static const struct v4l2_flash_ops v4l2_flash_ops; |
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static void mt6360_init_v4l2_flash_config(struct mt6360_led *led, |
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struct v4l2_flash_config *config) |
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{ |
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} |
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#endif |
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static int mt6360_led_register(struct device *parent, struct mt6360_led *led, |
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struct led_init_data *init_data) |
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{ |
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struct mt6360_priv *priv = led->priv; |
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struct v4l2_flash_config v4l2_config = {0}; |
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int ret; |
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|
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if ((led->led_no == MT6360_LED_ISNK1 || |
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led->led_no == MT6360_VIRTUAL_MULTICOLOR) && |
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(priv->leds_active & BIT(MT6360_LED_ISNK1))) { |
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/* |
|
* 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 <[email protected]>"); |
|
MODULE_DESCRIPTION("MT6360 LED Driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|