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Mon, 07 Sep 2020 03:28:18 -0700 (PDT) From: Gene Chen To: jacek.anaszewski@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, matthias.bgg@gmail.com Subject: [PATCH v3 1/2] leds: mt6360: Add LED driver for MT6360 Date: Mon, 7 Sep 2020 18:27:38 +0800 Message-Id: <1599474459-20853-2-git-send-email-gene.chen.richtek@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1599474459-20853-1-git-send-email-gene.chen.richtek@gmail.com> References: <1599474459-20853-1-git-send-email-gene.chen.richtek@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200907_062821_223792_D98D70F7 X-CRM114-Status: GOOD ( 26.93 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:541 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [gene.chen.richtek[at]gmail.com] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gene_chen@richtek.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, cy_huang@richtek.com, benjamin.chao@mediatek.com, linux-mediatek@lists.infradead.org, dmurphy@ti.com, linux-leds@vger.kernel.org, Wilma.Wu@mediatek.com, linux-arm-kernel@lists.infradead.org, shufan_lee@richtek.com MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org From: Gene Chen Add MT6360 LED driver include 2-channel Flash LED with torch/strobe mode, and 4-channel RGB LED support Register/Flash/Breath Mode Signed-off-by: Gene Chen --- drivers/leds/Kconfig | 11 + drivers/leds/Makefile | 1 + drivers/leds/leds-mt6360.c | 681 +++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 693 insertions(+) create mode 100644 drivers/leds/leds-mt6360.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 1c181df..94a6d83 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -271,6 +271,17 @@ config LEDS_MT6323 This option enables support for on-chip LED drivers found on Mediatek MT6323 PMIC. +config LEDS_MT6360 + tristate "LED Support for Mediatek MT6360 PMIC" + depends on LEDS_CLASS_FLASH && OF + depends on V4L2_FLASH_LED_CLASS || !V4L2_FLASH_LED_CLASS + depends on MFD_MT6360 + help + This option enables support for dual Flash LED drivers found on + Mediatek MT6360 PMIC. + Independent current sources supply for each flash LED support torch and strobe mode. + Includes Low-VF and short protection. + config LEDS_S3C24XX tristate "LED Support for Samsung S3C24XX GPIO LEDs" depends on LEDS_CLASS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index c2c7d7a..5596427 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_LEDS_MIKROTIK_RB532) += leds-rb532.o obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o obj-$(CONFIG_LEDS_MLXREG) += leds-mlxreg.o obj-$(CONFIG_LEDS_MT6323) += leds-mt6323.o +obj-$(CONFIG_LEDS_MT6360) += leds-mt6360.o obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o obj-$(CONFIG_LEDS_NIC78BX) += leds-nic78bx.o diff --git a/drivers/leds/leds-mt6360.c b/drivers/leds/leds-mt6360.c new file mode 100644 index 0000000..bd6fa48 --- /dev/null +++ b/drivers/leds/leds-mt6360.c @@ -0,0 +1,681 @@ +// SPDX-License-Identifier: GPL-2.0-only +// +// Copyright (C) 2020 MediaTek Inc. +// +// Author: Gene Chen + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +enum { + MT6360_LED_ISNK1 = 0, + MT6360_LED_ISNK2, + MT6360_LED_ISNK3, + MT6360_LED_ISNK4, + MT6360_LED_FLASH1, + MT6360_LED_FLASH2, + MT6360_MAX_LEDS, +}; + +#define MT6360_REG_RGBEN 0x380 +#define MT6360_REG_ISNK(_led_no) (0x381 + (_led_no)) +#define MT6360_ISNK_ENMASK(_led_no) BIT(7 - (_led_no)) +#define MT6360_ISNK_MASK 0x1F +#define MT6360_CHRINDSEL_MASK BIT(3) + +#define MT6360_REG_FLEDEN 0x37E +#define MT6360_REG_STRBTO 0x373 +#define MT6360_REG_FLEDBASE(_id) (0x372 + 4 * (_id - MT6360_LED_FLASH1)) +#define MT6360_REG_FLEDISTRB(_id) (MT6360_REG_FLEDBASE(_id) + 2) +#define MT6360_REG_FLEDITOR(_id) (MT6360_REG_FLEDBASE(_id) + 3) +#define MT6360_REG_CHGSTAT2 0x3E1 +#define MT6360_REG_FLEDSTAT1 0x3E9 +#define MT6360_ITORCH_MASK GENMASK(4, 0) +#define MT6360_ISTROBE_MASK GENMASK(6, 0) +#define MT6360_STRBTO_MASK GENMASK(6, 0) +#define MT6360_TORCHEN_MASK BIT(3) +#define MT6360_STROBEN_MASK BIT(2) +#define MT6360_FLCSEN_MASK(_id) BIT(MT6360_LED_FLASH2 - _id) +#define MT6360_FLEDCHGVINOVP_MASK BIT(3) +#define MT6360_FLED1STRBTO_MASK BIT(11) +#define MT6360_FLED2STRBTO_MASK BIT(10) +#define MT6360_FLED1STRB_MASK BIT(9) +#define MT6360_FLED2STRB_MASK BIT(8) +#define MT6360_FLED1SHORT_MASK BIT(7) +#define MT6360_FLED2SHORT_MASK BIT(6) +#define MT6360_FLEDLVF_MASK BIT(3) + +/* 0 means led_off, add one for dummy */ +#define MT6360_ISNK1_MAXLEVEL 13 +#define MT6360_ISNK4_MAXLEVEL 31 + +#define MT6360_ITORCH_MIN 25000 +#define MT6360_ITORCH_STEP 12500 +#define MT6360_ITORCH_MAX 400000 +#define MT6360_ISTRB_MIN 50000 +#define MT6360_ISTRB_STEP 12500 +#define MT6360_ISTRB_MAX 1500000 +#define MT6360_STRBTO_MIN 64000 +#define MT6360_STRBTO_STEP 32000 +#define MT6360_STRBTO_MAX 2432000 + +#define FLED_TORCH_FLAG_MASK 0x0c +#define FLED_TORCH_FLAG_SHFT 2 +#define FLED_STROBE_FLAG_MASK 0x03 + +#define STATE_OFF 0 +#define STATE_KEEP 1 +#define STATE_ON 2 + +struct mt6360_led { + union { + struct led_classdev isnk; + struct led_classdev_flash flash; + }; + struct v4l2_flash *v4l2_flash; + struct mt6360_priv *priv; + u32 led_no; + u32 default_state; +}; + +struct mt6360_priv { + struct device *dev; + struct regmap *regmap; + struct mt6360_led *leds[MT6360_MAX_LEDS]; + unsigned int fled_strobe_used; + unsigned int fled_torch_used; +}; + +static int mt6360_isnk_brightness_set(struct led_classdev *lcdev, enum led_brightness level) +{ + struct mt6360_led *led = container_of(lcdev, struct mt6360_led, isnk); + struct mt6360_priv *priv = led->priv; + u32 enable_mask = MT6360_ISNK_ENMASK(led->led_no); + u32 val = level ? MT6360_ISNK_ENMASK(led->led_no) : 0; + int ret; + + dev_dbg(lcdev->dev, "[%d] brightness %d\n", led->led_no, level); + + if (level) { + ret = regmap_update_bits(priv->regmap, MT6360_REG_ISNK(led->led_no), + MT6360_ISNK_MASK, level - 1); + if (ret) + return ret; + } + + ret = regmap_update_bits(priv->regmap, MT6360_REG_RGBEN, enable_mask, val); + if (ret) + return ret; + + return 0; +} + +static int mt6360_torch_brightness_set(struct led_classdev *lcdev, enum led_brightness level) +{ + struct mt6360_led *led = container_of(lcdev, struct mt6360_led, flash.led_cdev); + struct mt6360_priv *priv = led->priv; + u32 enable_mask = MT6360_TORCHEN_MASK | MT6360_FLCSEN_MASK(led->led_no); + u32 val = (level) ? MT6360_FLCSEN_MASK(led->led_no) : 0; + u32 prev = priv->fled_torch_used, curr; + int ret; + + dev_dbg(lcdev->dev, "[%d] brightness %d\n", led->led_no, level); + if (priv->fled_strobe_used) { + dev_warn(lcdev->dev, "Please disable strobe first [%d]\n", priv->fled_strobe_used); + return -EINVAL; + } + + if (level) + curr = prev | BIT(led->led_no); + else + curr = prev & (~BIT(led->led_no)); + + if (curr) + val |= MT6360_TORCHEN_MASK; + + if (level) { + ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDITOR(led->led_no), + MT6360_ITORCH_MASK, level - 1); + if (ret) + return ret; + } + + ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask, val); + if (ret) + return ret; + + priv->fled_torch_used = curr; + + return 0; +} + +static int mt6360_strobe_brightness_set(struct led_classdev_flash *fl_cdev, u32 brightness) +{ + struct mt6360_led *led = container_of(fl_cdev, struct mt6360_led, flash); + struct led_classdev *lcdev = &fl_cdev->led_cdev; + + dev_dbg(lcdev->dev, "[%d] strobe brightness %d\n", led->led_no, brightness); + return 0; +} + +static int _mt6360_strobe_brightness_set(struct led_classdev_flash *fl_cdev, u32 brightness) +{ + struct mt6360_led *led = container_of(fl_cdev, struct mt6360_led, flash); + struct mt6360_priv *priv = led->priv; + struct led_flash_setting *s = &fl_cdev->brightness; + u32 val = (brightness - s->min) / s->step; + + return regmap_update_bits(priv->regmap, MT6360_REG_FLEDISTRB(led->led_no), + MT6360_ISTROBE_MASK, val); +} + +static int mt6360_strobe_set(struct led_classdev_flash *fl_cdev, bool state) +{ + struct mt6360_led *led = container_of(fl_cdev, struct mt6360_led, flash); + struct mt6360_priv *priv = led->priv; + struct led_classdev *lcdev = &fl_cdev->led_cdev; + struct led_flash_setting *s = &fl_cdev->brightness; + u32 enable_mask = MT6360_STROBEN_MASK | MT6360_FLCSEN_MASK(led->led_no); + u32 val = state ? MT6360_FLCSEN_MASK(led->led_no) : 0; + u32 prev = priv->fled_strobe_used, curr; + int ret; + + dev_dbg(lcdev->dev, "[%d] strobe state %d\n", led->led_no, state); + if (priv->fled_torch_used) { + dev_warn(lcdev->dev, "Please disable torch first [0x%x]\n", priv->fled_torch_used); + return -EINVAL; + } + + if (state) + curr = prev | BIT(led->led_no); + else + curr = prev & (~BIT(led->led_no)); + + if (curr) + val |= MT6360_STROBEN_MASK; + + ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask, val); + if (ret) { + dev_err(lcdev->dev, "[%d] control current source %d fail\n", led->led_no, state); + return ret; + } + + /* used to prevent flash current spike when torch on */ + ret = _mt6360_strobe_brightness_set(fl_cdev, state ? s->val : s->min); + if (ret) + return ret; + + if (!prev && curr) + usleep_range(5000, 6000); + else if (prev && !curr) + udelay(500); + + priv->fled_strobe_used = curr; + return 0; +} + +static int mt6360_strobe_get(struct led_classdev_flash *fl_cdev, bool *state) +{ + struct mt6360_led *led = container_of(fl_cdev, struct mt6360_led, flash); + struct mt6360_priv *priv = led->priv; + + *state = !!(priv->fled_strobe_used & BIT(led->led_no)); + return 0; +} + +static int mt6360_timeout_set(struct led_classdev_flash *fl_cdev, u32 timeout) +{ + struct mt6360_led *led = container_of(fl_cdev, struct mt6360_led, flash); + struct mt6360_priv *priv = led->priv; + struct led_flash_setting *s = &fl_cdev->timeout; + u32 val = (timeout - s->min) / s->step; + + return regmap_update_bits(priv->regmap, MT6360_REG_STRBTO, MT6360_STRBTO_MASK, val); + +} + +static int mt6360_fault_get(struct led_classdev_flash *fl_cdev, u32 *fault) +{ + struct mt6360_led *led = container_of(fl_cdev, struct mt6360_led, flash); + struct mt6360_priv *priv = led->priv; + u16 fled_stat; + unsigned int chg_stat, strobe_timeout_mask, fled_short_mask; + u32 rfault = 0; + int ret; + + ret = regmap_read(priv->regmap, MT6360_REG_CHGSTAT2, &chg_stat); + if (ret) + return ret; + + ret = regmap_raw_read(priv->regmap, MT6360_REG_FLEDSTAT1, &fled_stat, sizeof(fled_stat)); + if (ret) + return ret; + + if (led->led_no == MT6360_LED_FLASH1) { + strobe_timeout_mask = MT6360_FLED1STRBTO_MASK; + fled_short_mask = MT6360_FLED1SHORT_MASK; + + } else { + strobe_timeout_mask = MT6360_FLED2STRBTO_MASK; + fled_short_mask = MT6360_FLED2SHORT_MASK; + } + + if (chg_stat & MT6360_FLEDCHGVINOVP_MASK) + rfault |= LED_FAULT_INPUT_VOLTAGE; + + if (fled_stat & strobe_timeout_mask) + rfault |= LED_FAULT_TIMEOUT; + + if (fled_stat & fled_short_mask) + rfault |= LED_FAULT_SHORT_CIRCUIT; + + if (fled_stat & MT6360_FLEDLVF_MASK) + rfault |= LED_FAULT_UNDER_VOLTAGE; + + *fault = rfault; + return 0; +} + +static const struct led_flash_ops mt6360_flash_ops = { + .flash_brightness_set = mt6360_strobe_brightness_set, + .strobe_set = mt6360_strobe_set, + .strobe_get = mt6360_strobe_get, + .timeout_set = mt6360_timeout_set, + .fault_get = mt6360_fault_get, +}; + +static int mt6360_isnk_init_default_state(struct mt6360_led *led) +{ + struct mt6360_priv *priv = led->priv; + unsigned int regval; + u32 level; + int ret; + + ret = regmap_read(priv->regmap, MT6360_REG_ISNK(led->led_no), ®val); + if (ret) + return ret; + level = regval & MT6360_ISNK_MASK; + + ret = regmap_read(priv->regmap, MT6360_REG_RGBEN, ®val); + if (ret) + return ret; + + if (regval & MT6360_ISNK_ENMASK(led->led_no)) + level += 1; + else + level = LED_OFF; + + switch (led->default_state) { + 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_isnk_register(struct device *parent, struct mt6360_led *led, + struct led_init_data *init_data) +{ + struct mt6360_priv *priv = led->priv; + int ret; + + if (led->led_no == MT6360_LED_ISNK1) { + /* change isink to sw mode */ + 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; + } + } + + 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; + } + + return 0; +} + +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 enable_mask = MT6360_FLCSEN_MASK(led->led_no); + int ret; + + ret = regmap_update_bits(priv->regmap, MT6360_REG_FLEDEN, enable_mask, + enable ? enable_mask : 0); + if (ret) + return ret; + + if (enable) + priv->fled_strobe_used |= BIT(led->led_no); + else + priv->fled_strobe_used &= (~BIT(led->led_no)); + + return 0; +} + +static const struct v4l2_flash_ops v4l2_flash_ops = { + .external_strobe_set = mt6360_flash_external_strobe_set, +}; + +static void mt6360_flash_init_v4l2_config(struct mt6360_led *led, struct v4l2_flash_config *config) +{ + struct led_classdev_flash *flash = &led->flash; + struct led_classdev *lcdev = &flash->led_cdev; + struct led_flash_setting *s = &config->intensity; + + snprintf(config->dev_name, sizeof(config->dev_name), "%s", lcdev->name); + + s->min = MT6360_ITORCH_MIN; + s->step = MT6360_ITORCH_STEP; + s->val = s->max = (s->min) + (lcdev->max_brightness - 1) * s->step; + + config->has_external_strobe = 1; +} +#else +static const struct v4l2_flash_ops v4l2_flash_ops; + +static void mt6360_flash_init_v4l2_config(struct mt6360_led *led, struct v4l2_flash_config *config) +{ +} +#endif + +static int mt6360_flash_register(struct device *parent, struct mt6360_led *led, + struct led_init_data *init_data) +{ + struct v4l2_flash_config v4l2_config = {0}; + int ret; + + 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_flash_init_v4l2_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 int mt6360_init_isnk_properties(struct mt6360_led *led, struct led_init_data *init_data) +{ + struct led_classdev *isnk = &led->isnk; + + if (led->led_no == MT6360_LED_ISNK4) + isnk->max_brightness = MT6360_ISNK4_MAXLEVEL; + else + isnk->max_brightness = MT6360_ISNK1_MAXLEVEL; + + isnk->brightness_set_blocking = mt6360_isnk_brightness_set; + + fwnode_property_read_string(init_data->fwnode, "linux,default-trigger", + &isnk->default_trigger); + + return 0; +} + +static void clamp_align(u32 *v, u32 min, u32 max, u32 step) +{ + *v = clamp_val(*v, min, max); + if (step > 1) + *v = (*v - min) / step * step + min; +} + +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 led_flash_setting *s; + u32 val; + int ret; + + ret = fwnode_property_read_u32(init_data->fwnode, "led-max-microamp", &val); + if (ret) + val = MT6360_ITORCH_MIN; + else + clamp_align(&val, MT6360_ITORCH_MIN, MT6360_ITORCH_MAX, MT6360_ITORCH_STEP); + + lcdev->max_brightness = (val - MT6360_ITORCH_MIN) / MT6360_ITORCH_STEP + 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) + val = MT6360_ISTRB_MIN; + else + clamp_align(&val, MT6360_ISTRB_MIN, MT6360_ISTRB_MAX, MT6360_ISTRB_STEP); + + s = &flash->brightness; + s->min = MT6360_ISTRB_MIN; + s->step = MT6360_ISTRB_STEP; + s->val = s->max = val; + + /* always configure as min level when off to prevent flash current spike */ + ret = _mt6360_strobe_brightness_set(flash, s->min); + if (ret) + return ret; + + ret = fwnode_property_read_u32(init_data->fwnode, "flash-max-timeout-us", &val); + if (ret) + val = MT6360_STRBTO_MIN; + else + clamp_align(&val, MT6360_STRBTO_MIN, MT6360_STRBTO_MAX, MT6360_STRBTO_STEP); + + s = &flash->timeout; + s->min = MT6360_STRBTO_MIN; + s->step = MT6360_STRBTO_STEP; + 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 *str; + + if (!fwnode_property_read_string(init_data->fwnode, "default-state", &str)) { + if (!strcmp(str, "on")) + led->default_state = STATE_ON; + else if (!strcmp(str, "keep")) + led->default_state = STATE_KEEP; + else + led->default_state = STATE_OFF; + } + + return 0; +} + +static int mt6360_led_probe(struct platform_device *pdev) +{ + struct mt6360_priv *priv; + struct fwnode_handle *child; + int i, ret; + + ret = device_get_child_node_count(&pdev->dev); + if (!ret || ret > MT6360_MAX_LEDS) + return -EINVAL; + + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = &pdev->dev; + + 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; + struct led_init_data init_data = { .fwnode = child, }; + u32 reg; + + ret = fwnode_property_read_u32(child, "reg", ®); + if (ret || reg >= MT6360_MAX_LEDS || priv->leds[reg]) { + ret = -EINVAL; + goto out; + } + + led = devm_kzalloc(&pdev->dev, sizeof(*led), GFP_KERNEL); + if (!led) { + ret = -ENOMEM; + goto out; + } + + led->led_no = reg; + led->priv = priv; + + ret = mt6360_init_common_properties(led, &init_data); + if (ret) + goto out; + + switch (reg) { + case MT6360_LED_ISNK1 ... MT6360_LED_ISNK4: + ret = mt6360_init_isnk_properties(led, &init_data); + if (ret) + goto out; + + ret = mt6360_isnk_register(&pdev->dev, led, &init_data); + break; + default: + ret = mt6360_init_flash_properties(led, &init_data); + if (ret) + goto out; + + ret = mt6360_flash_register(&pdev->dev, led, &init_data); + } + + if (ret) + goto out; + + priv->leds[reg] = led; + } + + platform_set_drvdata(pdev, priv); + return 0; +out: + for (i = MT6360_LED_FLASH1; i <= MT6360_LED_FLASH2; i++) { + struct mt6360_led *led = priv->leds[i]; + + if (led && led->v4l2_flash) + v4l2_flash_release(led->v4l2_flash); + + } + + return ret; +} + +static int mt6360_led_remove(struct platform_device *pdev) +{ + struct mt6360_priv *priv = platform_get_drvdata(pdev); + int i; + + for (i = MT6360_LED_FLASH1; i <= MT6360_LED_FLASH2; i++) { + struct mt6360_led *led = priv->leds[i]; + + if (led && led->v4l2_flash) + v4l2_flash_release(led->v4l2_flash); + + } + + 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 "); +MODULE_DESCRIPTION("MT6360 Led Driver"); +MODULE_LICENSE("GPL v2");