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-rw-r--r--drivers/leds/leds-mt6323.c153
1 files changed, 115 insertions, 38 deletions
diff --git a/drivers/leds/leds-mt6323.c b/drivers/leds/leds-mt6323.c
index 17ee88043f52..65a99c067216 100644
--- a/drivers/leds/leds-mt6323.c
+++ b/drivers/leds/leds-mt6323.c
@@ -33,22 +33,18 @@
*/
#define MT6323_RG_ISINK_CK_SEL_MASK(i) (BIT(10) << (i))
-/*
- * Register for MT6323_ISINK_CON0 to setup the
- * duty cycle of the blink.
- */
-#define MT6323_ISINK_CON0(i) (MT6323_ISINK0_CON0 + 0x8 * (i))
+#define MT6323_ISINK_CON(r, i) (r + 0x8 * (i))
+
+/* ISINK_CON0: Register to setup the duty cycle of the blink. */
#define MT6323_ISINK_DIM_DUTY_MASK (0x1f << 8)
#define MT6323_ISINK_DIM_DUTY(i) (((i) << 8) & \
- MT6323_ISINK_DIM_DUTY_MASK)
+ MT6323_ISINK_DIM_DUTY_MASK)
-/* Register to setup the period of the blink. */
-#define MT6323_ISINK_CON1(i) (MT6323_ISINK0_CON1 + 0x8 * (i))
+/* ISINK_CON1: Register to setup the period of the blink. */
#define MT6323_ISINK_DIM_FSEL_MASK (0xffff)
#define MT6323_ISINK_DIM_FSEL(i) ((i) & MT6323_ISINK_DIM_FSEL_MASK)
-/* Register to control the brightness. */
-#define MT6323_ISINK_CON2(i) (MT6323_ISINK0_CON2 + 0x8 * (i))
+/* ISINK_CON2: Register to control the brightness. */
#define MT6323_ISINK_CH_STEP_SHIFT 12
#define MT6323_ISINK_CH_STEP_MASK (0x7 << 12)
#define MT6323_ISINK_CH_STEP(i) (((i) << 12) & \
@@ -63,12 +59,9 @@
#define MT6323_ISINK_CH_EN_MASK(i) BIT(i)
#define MT6323_ISINK_CH_EN(i) BIT(i)
-#define MT6323_MAX_PERIOD 10000
-#define MT6323_MAX_LEDS 4
-#define MT6323_MAX_BRIGHTNESS 6
-#define MT6323_UNIT_DUTY 3125
-#define MT6323_CAL_HW_DUTY(o, p) DIV_ROUND_CLOSEST((o) * 100000ul,\
- (p) * MT6323_UNIT_DUTY)
+#define MAX_SUPPORTED_LEDS 8
+#define MT6323_CAL_HW_DUTY(o, p, u) DIV_ROUND_CLOSEST((o) * 100000ul,\
+ (p) * (u))
struct mt6323_leds;
@@ -87,11 +80,58 @@ struct mt6323_led {
};
/**
+ * struct mt6323_regs - register spec for the LED device
+ * @top_ckpdn: Offset to ISINK_CKPDN[0..x] registers
+ * @num_top_ckpdn: Number of ISINK_CKPDN registers
+ * @top_ckcon: Offset to ISINK_CKCON[0..x] registers
+ * @num_top_ckcon: Number of ISINK_CKCON registers
+ * @isink_con: Offset to ISINKx_CON[0..x] registers
+ * @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
+ */
+struct mt6323_regs {
+ const u16 *top_ckpdn;
+ u8 num_top_ckpdn;
+ const u16 *top_ckcon;
+ u8 num_top_ckcon;
+ const u16 *isink_con;
+ u8 num_isink_con;
+ u8 isink_max_regs;
+ u16 isink_en_ctrl;
+};
+
+/**
+ * struct mt6323_hwspec - hardware specific parameters
+ * @max_period: Maximum period for all LEDs
+ * @max_leds: Maximum number of supported LEDs
+ * @max_brightness: Maximum brightness for all LEDs
+ * @unit_duty: Steps of duty per period
+ */
+struct mt6323_hwspec {
+ u16 max_period;
+ u8 max_leds;
+ u16 max_brightness;
+ u16 unit_duty;
+};
+
+/**
+ * struct mt6323_data - device specific data
+ * @regs: Register spec for this device
+ * @spec: Hardware specific parameters
+ */
+struct mt6323_data {
+ const struct mt6323_regs *regs;
+ const struct mt6323_hwspec *spec;
+};
+
+/**
* struct mt6323_leds - state container for holding LED controller
* of the driver
* @dev: the device pointer
* @hw: the underlying hardware providing shared
* bus for the register operations
+ * @pdata: device specific data
* @lock: the lock among process context
* @led: the array that contains the state of individual
* LED device
@@ -99,9 +139,10 @@ struct mt6323_led {
struct mt6323_leds {
struct device *dev;
struct mt6397_chip *hw;
+ const struct mt6323_data *pdata;
/* protect among process context */
struct mutex lock;
- struct mt6323_led *led[MT6323_MAX_LEDS];
+ struct mt6323_led *led[MAX_SUPPORTED_LEDS];
};
static int mt6323_led_hw_brightness(struct led_classdev *cdev,
@@ -109,6 +150,7 @@ static int mt6323_led_hw_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;
u32 con2_mask = 0, con2_val = 0;
int ret;
@@ -124,7 +166,7 @@ static int mt6323_led_hw_brightness(struct led_classdev *cdev,
MT6323_ISINK_SFSTR0_TC(2) |
MT6323_ISINK_SFSTR0_EN;
- ret = regmap_update_bits(regmap, MT6323_ISINK_CON2(led->id),
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON(regs->isink_con[2], led->id),
con2_mask, con2_val);
return ret;
}
@@ -133,18 +175,19 @@ static int mt6323_led_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;
unsigned int status;
int ret;
status = MT6323_ISINK_CH_EN(led->id);
- ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL,
+ ret = regmap_update_bits(regmap, regs->isink_en_ctrl,
MT6323_ISINK_CH_EN_MASK(led->id), ~status);
if (ret < 0)
return ret;
usleep_range(100, 300);
- ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2,
+ ret = regmap_update_bits(regmap, regs->top_ckpdn[2],
MT6323_RG_ISINK_CK_PDN_MASK(led->id),
MT6323_RG_ISINK_CK_PDN(led->id));
if (ret < 0)
@@ -158,25 +201,26 @@ mt6323_get_led_hw_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, MT6323_TOP_CKPDN2, &status);
+ ret = regmap_read(regmap, regs->top_ckpdn[2], &status);
if (ret < 0)
return ret;
if (status & MT6323_RG_ISINK_CK_PDN_MASK(led->id))
return 0;
- ret = regmap_read(regmap, MT6323_ISINK_EN_CTRL, &status);
+ ret = regmap_read(regmap, regs->isink_en_ctrl, &status);
if (ret < 0)
return ret;
if (!(status & MT6323_ISINK_CH_EN(led->id)))
return 0;
- ret = regmap_read(regmap, MT6323_ISINK_CON2(led->id), &status);
+ ret = regmap_read(regmap, MT6323_ISINK_CON(regs->isink_con[2], led->id), &status);
if (ret < 0)
return ret;
@@ -189,6 +233,7 @@ static int mt6323_led_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;
unsigned int status;
int ret;
@@ -198,13 +243,13 @@ static int mt6323_led_hw_on(struct led_classdev *cdev,
* clock and channel and let work with continuous blink as
* the default.
*/
- ret = regmap_update_bits(regmap, MT6323_TOP_CKCON1,
+ ret = regmap_update_bits(regmap, regs->top_ckcon[1],
MT6323_RG_ISINK_CK_SEL_MASK(led->id), 0);
if (ret < 0)
return ret;
status = MT6323_RG_ISINK_CK_PDN(led->id);
- ret = regmap_update_bits(regmap, MT6323_TOP_CKPDN2,
+ ret = regmap_update_bits(regmap, regs->top_ckpdn[2],
MT6323_RG_ISINK_CK_PDN_MASK(led->id),
~status);
if (ret < 0)
@@ -212,7 +257,7 @@ static int mt6323_led_hw_on(struct led_classdev *cdev,
usleep_range(100, 300);
- ret = regmap_update_bits(regmap, MT6323_ISINK_EN_CTRL,
+ ret = regmap_update_bits(regmap, regs->isink_en_ctrl,
MT6323_ISINK_CH_EN_MASK(led->id),
MT6323_ISINK_CH_EN(led->id));
if (ret < 0)
@@ -222,13 +267,13 @@ static int mt6323_led_hw_on(struct led_classdev *cdev,
if (ret < 0)
return ret;
- ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON(regs->isink_con[0], led->id),
MT6323_ISINK_DIM_DUTY_MASK,
MT6323_ISINK_DIM_DUTY(31));
if (ret < 0)
return ret;
- ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON(regs->isink_con[1], led->id),
MT6323_ISINK_DIM_FSEL_MASK,
MT6323_ISINK_DIM_FSEL(1000));
if (ret < 0)
@@ -243,6 +288,8 @@ static int mt6323_led_set_blink(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;
+ const struct mt6323_hwspec *spec = leds->pdata->spec;
struct regmap *regmap = leds->hw->regmap;
unsigned long period;
u8 duty_hw;
@@ -265,14 +312,14 @@ static int mt6323_led_set_blink(struct led_classdev *cdev,
*/
period = *delay_on + *delay_off;
- if (period > MT6323_MAX_PERIOD)
+ if (period > spec->max_period)
return -EINVAL;
/*
* Calculate duty_hw based on the percentage of period during
* which the led is ON.
*/
- duty_hw = MT6323_CAL_HW_DUTY(*delay_on, period);
+ duty_hw = MT6323_CAL_HW_DUTY(*delay_on, period, spec->unit_duty);
/* hardware doesn't support zero duty cycle. */
if (!duty_hw)
@@ -290,13 +337,13 @@ static int mt6323_led_set_blink(struct led_classdev *cdev,
led->current_brightness = cdev->max_brightness;
}
- ret = regmap_update_bits(regmap, MT6323_ISINK_CON0(led->id),
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON(regs->isink_con[0], led->id),
MT6323_ISINK_DIM_DUTY_MASK,
MT6323_ISINK_DIM_DUTY(duty_hw - 1));
if (ret < 0)
goto out;
- ret = regmap_update_bits(regmap, MT6323_ISINK_CON1(led->id),
+ ret = regmap_update_bits(regmap, MT6323_ISINK_CON(regs->isink_con[1], led->id),
MT6323_ISINK_DIM_FSEL_MASK,
MT6323_ISINK_DIM_FSEL(period - 1));
out:
@@ -369,6 +416,8 @@ static int mt6323_led_probe(struct platform_device *pdev)
struct mt6397_chip *hw = dev_get_drvdata(dev->parent);
struct mt6323_leds *leds;
struct mt6323_led *led;
+ const struct mt6323_regs *regs;
+ const struct mt6323_hwspec *spec;
int ret;
unsigned int status;
u32 reg;
@@ -379,6 +428,9 @@ static int mt6323_led_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, leds);
leds->dev = dev;
+ leds->pdata = device_get_match_data(dev);
+ regs = leds->pdata->regs;
+ spec = leds->pdata->spec;
/*
* leds->hw points to the underlying bus for the register
@@ -388,11 +440,11 @@ static int mt6323_led_probe(struct platform_device *pdev)
mutex_init(&leds->lock);
status = MT6323_RG_DRV_32K_CK_PDN;
- ret = regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,
+ ret = regmap_update_bits(leds->hw->regmap, regs->top_ckpdn[0],
MT6323_RG_DRV_32K_CK_PDN_MASK, ~status);
if (ret < 0) {
dev_err(leds->dev,
- "Failed to update MT6323_TOP_CKPDN0 Register\n");
+ "Failed to update TOP_CKPDN0 Register\n");
return ret;
}
@@ -405,7 +457,8 @@ static int mt6323_led_probe(struct platform_device *pdev)
goto put_child_node;
}
- if (reg >= MT6323_MAX_LEDS || leds->led[reg]) {
+ if (reg >= spec->max_leds || reg >= MAX_SUPPORTED_LEDS ||
+ leds->led[reg]) {
dev_err(dev, "Invalid led reg %u\n", reg);
ret = -EINVAL;
goto put_child_node;
@@ -419,7 +472,7 @@ static int mt6323_led_probe(struct platform_device *pdev)
leds->led[reg] = led;
leds->led[reg]->id = reg;
- leds->led[reg]->cdev.max_brightness = MT6323_MAX_BRIGHTNESS;
+ 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;
@@ -454,13 +507,14 @@ put_child_node:
static int mt6323_led_remove(struct platform_device *pdev)
{
struct mt6323_leds *leds = platform_get_drvdata(pdev);
+ const struct mt6323_regs *regs = leds->pdata->regs;
int i;
/* Turn the LEDs off on driver removal. */
for (i = 0 ; leds->led[i] ; i++)
mt6323_led_hw_off(&leds->led[i]->cdev);
- regmap_update_bits(leds->hw->regmap, MT6323_TOP_CKPDN0,
+ regmap_update_bits(leds->hw->regmap, regs->top_ckpdn[0],
MT6323_RG_DRV_32K_CK_PDN_MASK,
MT6323_RG_DRV_32K_CK_PDN);
@@ -469,8 +523,31 @@ static int mt6323_led_remove(struct platform_device *pdev)
return 0;
}
+static const struct mt6323_regs mt6323_registers = {
+ .top_ckpdn = (const u16[]){ 0x102, 0x106, 0x10e },
+ .num_top_ckpdn = 3,
+ .top_ckcon = (const u16[]){ 0x120, 0x126 },
+ .num_top_ckcon = 2,
+ .isink_con = (const u16[]){ 0x330, 0x332, 0x334 },
+ .num_isink_con = 3,
+ .isink_max_regs = 4, /* ISINK[0..3] */
+ .isink_en_ctrl = 0x356,
+};
+
+static const struct mt6323_hwspec mt6323_spec = {
+ .max_period = 10000,
+ .max_leds = 4,
+ .max_brightness = 6,
+ .unit_duty = 3125,
+};
+
+static const struct mt6323_data mt6323_pdata = {
+ .regs = &mt6323_registers,
+ .spec = &mt6323_spec,
+};
+
static const struct of_device_id mt6323_led_dt_match[] = {
- { .compatible = "mediatek,mt6323-led" },
+ { .compatible = "mediatek,mt6323-led", .data = &mt6323_pdata},
{},
};
MODULE_DEVICE_TABLE(of, mt6323_led_dt_match);
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-09 02:55:31 +0300