diff options
| -rw-r--r-- | drivers/leds/leds-mt6323.c | 171 |
1 files changed, 164 insertions, 7 deletions
diff --git a/drivers/leds/leds-mt6323.c b/drivers/leds/leds-mt6323.c index 85b056fcd94e..e8fecfc2e90a 100644 --- a/drivers/leds/leds-mt6323.c +++ b/drivers/leds/leds-mt6323.c @@ -20,6 +20,11 @@ #define RG_DRV_32K_CK_PDN BIT(11) #define RG_DRV_32K_CK_PDN_MASK BIT(11) +/* 32K/1M/6M clock common for WLED device */ +#define RG_VWLED_1M_CK_PDN BIT(0) +#define RG_VWLED_32K_CK_PDN BIT(12) +#define RG_VWLED_6M_CK_PDN BIT(13) + /* * Register field for TOP_CKPDN2 to enable * individual clock for LED device. @@ -71,7 +76,7 @@ struct mt6323_led { int id; struct mt6323_leds *parent; struct led_classdev cdev; - enum led_brightness current_brightness; + unsigned int current_brightness; }; /** @@ -84,6 +89,7 @@ struct mt6323_led { * @num_isink_con: Number of ISINKx_CON registers * @isink_max_regs: Number of ISINK[0..x] registers * @isink_en_ctrl: Offset to ISINK_EN_CTRL register + * @iwled_en_ctrl: Offset to IWLED_EN_CTRL register */ struct mt6323_regs { const u16 *top_ckpdn; @@ -94,18 +100,21 @@ struct mt6323_regs { u8 num_isink_con; u8 isink_max_regs; u16 isink_en_ctrl; + u16 iwled_en_ctrl; }; /** * struct mt6323_hwspec - hardware specific parameters * @max_period: Maximum period for all LEDs * @max_leds: Maximum number of supported LEDs + * @max_wleds: Maximum number of WLEDs * @max_brightness: Maximum brightness for all LEDs * @unit_duty: Steps of duty per period */ struct mt6323_hwspec { u16 max_period; u8 max_leds; + u8 max_wleds; u16 max_brightness; u16 unit_duty; }; @@ -377,6 +386,117 @@ out: return ret; } +static int mtk_wled_hw_on(struct led_classdev *cdev) +{ + struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); + struct mt6323_leds *leds = led->parent; + const struct mt6323_regs *regs = leds->pdata->regs; + struct regmap *regmap = leds->hw->regmap; + int ret; + + ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN); + if (ret) + return ret; + + ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN); + if (ret) + return ret; + + ret = regmap_clear_bits(regmap, regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN); + if (ret) + return ret; + + usleep_range(5000, 6000); + + /* Enable WLED channel pair */ + ret = regmap_set_bits(regmap, regs->iwled_en_ctrl, BIT(led->id)); + if (ret) + return ret; + + ret = regmap_set_bits(regmap, regs->iwled_en_ctrl, BIT(led->id + 1)); + if (ret) + return ret; + + return 0; +} + +static int mtk_wled_hw_off(struct led_classdev *cdev) +{ + struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); + struct mt6323_leds *leds = led->parent; + const struct mt6323_regs *regs = leds->pdata->regs; + struct regmap *regmap = leds->hw->regmap; + int ret; + + ret = regmap_clear_bits(regmap, regs->iwled_en_ctrl, BIT(led->id + 1)); + if (ret) + return ret; + + ret = regmap_clear_bits(regmap, regs->iwled_en_ctrl, BIT(led->id)); + if (ret) + return ret; + + ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_32K_CK_PDN); + if (ret) + return ret; + + ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_6M_CK_PDN); + if (ret) + return ret; + + ret = regmap_set_bits(regmap, regs->top_ckpdn[0], RG_VWLED_1M_CK_PDN); + if (ret) + return ret; + + return 0; +} + +static unsigned int mt6323_get_wled_brightness(struct led_classdev *cdev) +{ + struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); + struct mt6323_leds *leds = led->parent; + const struct mt6323_regs *regs = leds->pdata->regs; + struct regmap *regmap = leds->hw->regmap; + unsigned int status; + int ret; + + ret = regmap_read(regmap, regs->iwled_en_ctrl, &status); + if (ret) + return 0; + + /* Always two channels per WLED */ + status &= BIT(led->id) | BIT(led->id + 1); + + return status ? led->current_brightness : 0; +} + +static int mt6323_wled_set_brightness(struct led_classdev *cdev, + unsigned int brightness) +{ + struct mt6323_led *led = container_of(cdev, struct mt6323_led, cdev); + struct mt6323_leds *leds = led->parent; + int ret = 0; + + mutex_lock(&leds->lock); + + if (brightness) { + if (!led->current_brightness) + ret = mtk_wled_hw_on(cdev); + if (ret) + goto out; + } else { + ret = mtk_wled_hw_off(cdev); + if (ret) + goto out; + } + + led->current_brightness = brightness; +out: + mutex_unlock(&leds->lock); + + return ret; +} + static int mt6323_led_set_dt_default(struct led_classdev *cdev, struct device_node *np) { @@ -416,6 +536,7 @@ static int mt6323_led_probe(struct platform_device *pdev) int ret; unsigned int status; u32 reg; + u8 max_leds; leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); if (!leds) @@ -426,6 +547,7 @@ static int mt6323_led_probe(struct platform_device *pdev) leds->pdata = device_get_match_data(dev); regs = leds->pdata->regs; spec = leds->pdata->spec; + max_leds = spec->max_leds + spec->max_wleds; /* * leds->hw points to the underlying bus for the register @@ -445,6 +567,7 @@ static int mt6323_led_probe(struct platform_device *pdev) for_each_available_child_of_node(np, child) { struct led_init_data init_data = {}; + bool is_wled; ret = of_property_read_u32(child, "reg", ®); if (ret) { @@ -452,7 +575,7 @@ static int mt6323_led_probe(struct platform_device *pdev) goto put_child_node; } - if (reg >= spec->max_leds || reg >= MAX_SUPPORTED_LEDS || + if (reg >= max_leds || reg >= MAX_SUPPORTED_LEDS || leds->led[reg]) { dev_err(dev, "Invalid led reg %u\n", reg); ret = -EINVAL; @@ -465,14 +588,24 @@ static int mt6323_led_probe(struct platform_device *pdev) goto put_child_node; } + is_wled = of_property_read_bool(child, "mediatek,is-wled"); + leds->led[reg] = led; leds->led[reg]->id = reg; leds->led[reg]->cdev.max_brightness = spec->max_brightness; - leds->led[reg]->cdev.brightness_set_blocking = - mt6323_led_set_brightness; - leds->led[reg]->cdev.blink_set = mt6323_led_set_blink; - leds->led[reg]->cdev.brightness_get = - mt6323_get_led_hw_brightness; + + if (is_wled) { + leds->led[reg]->cdev.brightness_set_blocking = + mt6323_wled_set_brightness; + leds->led[reg]->cdev.brightness_get = + mt6323_get_wled_brightness; + } else { + leds->led[reg]->cdev.brightness_set_blocking = + mt6323_led_set_brightness; + leds->led[reg]->cdev.blink_set = mt6323_led_set_blink; + leds->led[reg]->cdev.brightness_get = + mt6323_get_led_hw_brightness; + } leds->led[reg]->parent = leds; ret = mt6323_led_set_dt_default(&leds->led[reg]->cdev, child); @@ -540,6 +673,17 @@ static const struct mt6323_regs mt6331_registers = { .isink_en_ctrl = 0x43a, }; +static const struct mt6323_regs mt6332_registers = { + .top_ckpdn = (const u16[]){ 0x8094, 0x809a, 0x80a0 }, + .num_top_ckpdn = 3, + .top_ckcon = (const u16[]){ 0x80a6, 0x80ac }, + .num_top_ckcon = 2, + .isink_con = (const u16[]){ 0x8cd4 }, + .num_isink_con = 1, + .isink_max_regs = 12, /* IWLED[0..2, 3..9] */ + .iwled_en_ctrl = 0x8cda, +}; + static const struct mt6323_hwspec mt6323_spec = { .max_period = 10000, .max_leds = 4, @@ -547,6 +691,13 @@ static const struct mt6323_hwspec mt6323_spec = { .unit_duty = 3125, }; +static const struct mt6323_hwspec mt6332_spec = { + /* There are no LEDs in MT6332. Only WLEDs are present. */ + .max_leds = 0, + .max_wleds = 1, + .max_brightness = 1024, +}; + static const struct mt6323_data mt6323_pdata = { .regs = &mt6323_registers, .spec = &mt6323_spec, @@ -557,9 +708,15 @@ static const struct mt6323_data mt6331_pdata = { .spec = &mt6323_spec, }; +static const struct mt6323_data mt6332_pdata = { + .regs = &mt6332_registers, + .spec = &mt6332_spec, +}; + static const struct of_device_id mt6323_led_dt_match[] = { { .compatible = "mediatek,mt6323-led", .data = &mt6323_pdata}, { .compatible = "mediatek,mt6331-led", .data = &mt6331_pdata }, + { .compatible = "mediatek,mt6332-led", .data = &mt6332_pdata }, {}, }; MODULE_DEVICE_TABLE(of, mt6323_led_dt_match); |