[PATCH V5 4/8] backlight: qcom-wled: Rename PM8941* to WLED3

Rename the PM8941* references as WLED3 to make the driver generic and have WLED support for other PMICs. Also rename "i_boost_limit" and "i_limit" variables to "boost_i_limit" and "string_i_limit" respectively to resemble the corresponding register names.

Signed-off-by: Kiran Gunda kgunda@codeaurora.org Reviewed-by: Daniel Thompson daniel.thompson@linaro.org Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org --- Changes from V3: - Changed the MODULE_DESCRIPTION

Changes from V4: - Updated the commit message.

drivers/video/backlight/qcom-wled.c | 248 ++++++++++++++++++------------------ 1 file changed, 125 insertions(+), 123 deletions(-)

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 0b6d219..3cd6e75 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -18,77 +18,79 @@ #include <linux/regmap.h>

/* From DT binding */ -#define PM8941_WLED_DEFAULT_BRIGHTNESS 2048 +#define WLED_DEFAULT_BRIGHTNESS 2048

-#define PM8941_WLED_REG_VAL_BASE 0x40 -#define PM8941_WLED_REG_VAL_MAX 0xFFF +#define WLED3_SINK_REG_BRIGHT_MAX 0xFFF +#define WLED3_CTRL_REG_VAL_BASE 0x40

-#define PM8941_WLED_REG_MOD_EN 0x46 -#define PM8941_WLED_REG_MOD_EN_BIT BIT(7) -#define PM8941_WLED_REG_MOD_EN_MASK BIT(7) +/* WLED3 control registers */ +#define WLED3_CTRL_REG_MOD_EN 0x46 +#define WLED3_CTRL_REG_MOD_EN_BIT BIT(7) +#define WLED3_CTRL_REG_MOD_EN_MASK BIT(7)

-#define PM8941_WLED_REG_SYNC 0x47 -#define PM8941_WLED_REG_SYNC_MASK 0x07 -#define PM8941_WLED_REG_SYNC_LED1 BIT(0) -#define PM8941_WLED_REG_SYNC_LED2 BIT(1) -#define PM8941_WLED_REG_SYNC_LED3 BIT(2) -#define PM8941_WLED_REG_SYNC_ALL 0x07 -#define PM8941_WLED_REG_SYNC_CLEAR 0x00 +#define WLED3_CTRL_REG_FREQ 0x4c +#define WLED3_CTRL_REG_FREQ_MASK 0x0f

-#define PM8941_WLED_REG_FREQ 0x4c -#define PM8941_WLED_REG_FREQ_MASK 0x0f +#define WLED3_CTRL_REG_OVP 0x4d +#define WLED3_CTRL_REG_OVP_MASK 0x03

-#define PM8941_WLED_REG_OVP 0x4d -#define PM8941_WLED_REG_OVP_MASK 0x03 +#define WLED3_CTRL_REG_ILIMIT 0x4e +#define WLED3_CTRL_REG_ILIMIT_MASK 0x07

-#define PM8941_WLED_REG_BOOST 0x4e -#define PM8941_WLED_REG_BOOST_MASK 0x07 +/* WLED3 sink registers */ +#define WLED3_SINK_REG_SYNC 0x47 +#define WLED3_SINK_REG_SYNC_MASK 0x07 +#define WLED3_SINK_REG_SYNC_LED1 BIT(0) +#define WLED3_SINK_REG_SYNC_LED2 BIT(1) +#define WLED3_SINK_REG_SYNC_LED3 BIT(2) +#define WLED3_SINK_REG_SYNC_ALL 0x07 +#define WLED3_SINK_REG_SYNC_CLEAR 0x00

-#define PM8941_WLED_REG_SINK 0x4f -#define PM8941_WLED_REG_SINK_MASK 0xe0 -#define PM8941_WLED_REG_SINK_SHFT 0x05 +#define WLED3_SINK_REG_CURR_SINK 0x4f +#define WLED3_SINK_REG_CURR_SINK_MASK 0xe0 +#define WLED3_SINK_REG_CURR_SINK_SHFT 0x05

-/* Per-'string' registers below */ -#define PM8941_WLED_REG_STR_OFFSET 0x10 +/* WLED3 per-'string' registers below */ +#define WLED3_SINK_REG_STR_OFFSET 0x10

-#define PM8941_WLED_REG_STR_MOD_EN_BASE 0x60 -#define PM8941_WLED_REG_STR_MOD_MASK BIT(7) -#define PM8941_WLED_REG_STR_MOD_EN BIT(7) +#define WLED3_SINK_REG_STR_MOD_EN_BASE 0x60 +#define WLED3_SINK_REG_STR_MOD_MASK BIT(7) +#define WLED3_SINK_REG_STR_MOD_EN BIT(7)

-#define PM8941_WLED_REG_STR_SCALE_BASE 0x62 -#define PM8941_WLED_REG_STR_SCALE_MASK 0x1f +#define WLED3_SINK_REG_STR_FULL_SCALE_CURR 0x62 +#define WLED3_SINK_REG_STR_FULL_SCALE_CURR_MASK 0x1f

-#define PM8941_WLED_REG_STR_MOD_SRC_BASE 0x63 -#define PM8941_WLED_REG_STR_MOD_SRC_MASK 0x01 -#define PM8941_WLED_REG_STR_MOD_SRC_INT 0x00 -#define PM8941_WLED_REG_STR_MOD_SRC_EXT 0x01 +#define WLED3_SINK_REG_STR_MOD_SRC_BASE 0x63 +#define WLED3_SINK_REG_STR_MOD_SRC_MASK 0x01 +#define WLED3_SINK_REG_STR_MOD_SRC_INT 0x00 +#define WLED3_SINK_REG_STR_MOD_SRC_EXT 0x01

-#define PM8941_WLED_REG_STR_CABC_BASE 0x66 -#define PM8941_WLED_REG_STR_CABC_MASK BIT(7) -#define PM8941_WLED_REG_STR_CABC_EN BIT(7) +#define WLED3_SINK_REG_STR_CABC_BASE 0x66 +#define WLED3_SINK_REG_STR_CABC_MASK BIT(7) +#define WLED3_SINK_REG_STR_CABC_EN BIT(7)

-struct pm8941_wled_config { - u32 i_boost_limit; +struct wled_config { + u32 boost_i_limit; u32 ovp; u32 switch_freq; u32 num_strings; - u32 i_limit; + u32 string_i_limit; bool cs_out_en; bool ext_gen; bool cabc_en; };

-struct pm8941_wled { +struct wled { const char *name; struct regmap *regmap; u16 addr;

- struct pm8941_wled_config cfg; + struct wled_config cfg; };

-static int pm8941_wled_update_status(struct backlight_device *bl) +static int wled_update_status(struct backlight_device *bl) { - struct pm8941_wled *wled = bl_get_data(bl); + struct wled *wled = bl_get_data(bl); u16 val = bl->props.brightness; u8 ctrl = 0; int rc; @@ -100,11 +102,11 @@ static int pm8941_wled_update_status(struct backlight_device *bl) val = 0;

if (val != 0) - ctrl = PM8941_WLED_REG_MOD_EN_BIT; + ctrl = WLED3_CTRL_REG_MOD_EN_BIT;

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_MOD_EN, - PM8941_WLED_REG_MOD_EN_MASK, ctrl); + wled->addr + WLED3_CTRL_REG_MOD_EN, + WLED3_CTRL_REG_MOD_EN_MASK, ctrl); if (rc) return rc;

@@ -112,89 +114,89 @@ static int pm8941_wled_update_status(struct backlight_device *bl) u8 v[2] = { val & 0xff, (val >> 8) & 0xf };

rc = regmap_bulk_write(wled->regmap, - wled->addr + PM8941_WLED_REG_VAL_BASE + 2 * i, + wled->addr + WLED3_CTRL_REG_VAL_BASE + 2 * i, v, 2); if (rc) return rc; }

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_SYNC, - PM8941_WLED_REG_SYNC_MASK, PM8941_WLED_REG_SYNC_ALL); + wled->addr + WLED3_SINK_REG_SYNC, + WLED3_SINK_REG_SYNC_MASK, WLED3_SINK_REG_SYNC_ALL); if (rc) return rc;

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_SYNC, - PM8941_WLED_REG_SYNC_MASK, PM8941_WLED_REG_SYNC_CLEAR); + wled->addr + WLED3_SINK_REG_SYNC, + WLED3_SINK_REG_SYNC_MASK, WLED3_SINK_REG_SYNC_CLEAR); return rc; }

-static int pm8941_wled_setup(struct pm8941_wled *wled) +static int wled_setup(struct wled *wled) { int rc; int i;

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_OVP, - PM8941_WLED_REG_OVP_MASK, wled->cfg.ovp); + wled->addr + WLED3_CTRL_REG_OVP, + WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp); if (rc) return rc;

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_BOOST, - PM8941_WLED_REG_BOOST_MASK, wled->cfg.i_boost_limit); + wled->addr + WLED3_CTRL_REG_ILIMIT, + WLED3_CTRL_REG_ILIMIT_MASK, wled->cfg.boost_i_limit); if (rc) return rc;

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_FREQ, - PM8941_WLED_REG_FREQ_MASK, wled->cfg.switch_freq); + wled->addr + WLED3_CTRL_REG_FREQ, + WLED3_CTRL_REG_FREQ_MASK, wled->cfg.switch_freq); if (rc) return rc;

if (wled->cfg.cs_out_en) { u8 all = (BIT(wled->cfg.num_strings) - 1) - << PM8941_WLED_REG_SINK_SHFT; + << WLED3_SINK_REG_CURR_SINK_SHFT;

rc = regmap_update_bits(wled->regmap, - wled->addr + PM8941_WLED_REG_SINK, - PM8941_WLED_REG_SINK_MASK, all); + wled->addr + WLED3_SINK_REG_CURR_SINK, + WLED3_SINK_REG_CURR_SINK_MASK, all); if (rc) return rc; }

for (i = 0; i < wled->cfg.num_strings; ++i) { - u16 addr = wled->addr + PM8941_WLED_REG_STR_OFFSET * i; + u16 addr = wled->addr + WLED3_SINK_REG_STR_OFFSET * i;

rc = regmap_update_bits(wled->regmap, - addr + PM8941_WLED_REG_STR_MOD_EN_BASE, - PM8941_WLED_REG_STR_MOD_MASK, - PM8941_WLED_REG_STR_MOD_EN); + addr + WLED3_SINK_REG_STR_MOD_EN_BASE, + WLED3_SINK_REG_STR_MOD_MASK, + WLED3_SINK_REG_STR_MOD_EN); if (rc) return rc;

if (wled->cfg.ext_gen) { rc = regmap_update_bits(wled->regmap, - addr + PM8941_WLED_REG_STR_MOD_SRC_BASE, - PM8941_WLED_REG_STR_MOD_SRC_MASK, - PM8941_WLED_REG_STR_MOD_SRC_EXT); + addr + WLED3_SINK_REG_STR_MOD_SRC_BASE, + WLED3_SINK_REG_STR_MOD_SRC_MASK, + WLED3_SINK_REG_STR_MOD_SRC_EXT); if (rc) return rc; }

rc = regmap_update_bits(wled->regmap, - addr + PM8941_WLED_REG_STR_SCALE_BASE, - PM8941_WLED_REG_STR_SCALE_MASK, - wled->cfg.i_limit); + addr + WLED3_SINK_REG_STR_FULL_SCALE_CURR, + WLED3_SINK_REG_STR_FULL_SCALE_CURR_MASK, + wled->cfg.string_i_limit); if (rc) return rc;

rc = regmap_update_bits(wled->regmap, - addr + PM8941_WLED_REG_STR_CABC_BASE, - PM8941_WLED_REG_STR_CABC_MASK, + addr + WLED3_SINK_REG_STR_CABC_BASE, + WLED3_SINK_REG_STR_CABC_MASK, wled->cfg.cabc_en ? - PM8941_WLED_REG_STR_CABC_EN : 0); + WLED3_SINK_REG_STR_CABC_EN : 0); if (rc) return rc; } @@ -202,9 +204,9 @@ static int pm8941_wled_setup(struct pm8941_wled *wled) return 0; }

-static const struct pm8941_wled_config pm8941_wled_config_defaults = { - .i_boost_limit = 3, - .i_limit = 20, +static const struct wled_config wled3_config_defaults = { + .boost_i_limit = 3, + .string_i_limit = 20, .ovp = 2, .switch_freq = 5, .num_strings = 0, @@ -213,55 +215,55 @@ static int pm8941_wled_setup(struct pm8941_wled *wled) .cabc_en = false, };

-struct pm8941_wled_var_cfg { +struct wled_var_cfg { const u32 *values; u32 (*fn)(u32); int size; };

-static const u32 pm8941_wled_i_boost_limit_values[] = { +static const u32 wled3_boost_i_limit_values[] = { 105, 385, 525, 805, 980, 1260, 1400, 1680, };

-static const struct pm8941_wled_var_cfg pm8941_wled_i_boost_limit_cfg = { - .values = pm8941_wled_i_boost_limit_values, - .size = ARRAY_SIZE(pm8941_wled_i_boost_limit_values), +static const struct wled_var_cfg wled3_boost_i_limit_cfg = { + .values = wled3_boost_i_limit_values, + .size = ARRAY_SIZE(wled3_boost_i_limit_values), };

-static const u32 pm8941_wled_ovp_values[] = { +static const u32 wled3_ovp_values[] = { 35, 32, 29, 27, };

-static const struct pm8941_wled_var_cfg pm8941_wled_ovp_cfg = { - .values = pm8941_wled_ovp_values, - .size = ARRAY_SIZE(pm8941_wled_ovp_values), +static const struct wled_var_cfg wled3_ovp_cfg = { + .values = wled3_ovp_values, + .size = ARRAY_SIZE(wled3_ovp_values), };

-static u32 pm8941_wled_num_strings_values_fn(u32 idx) +static u32 wled3_num_strings_values_fn(u32 idx) { return idx + 1; }

-static const struct pm8941_wled_var_cfg pm8941_wled_num_strings_cfg = { - .fn = pm8941_wled_num_strings_values_fn, +static const struct wled_var_cfg wled3_num_strings_cfg = { + .fn = wled3_num_strings_values_fn, .size = 3, };

-static u32 pm8941_wled_switch_freq_values_fn(u32 idx) +static u32 wled3_switch_freq_values_fn(u32 idx) { return 19200 / (2 * (1 + idx)); }

-static const struct pm8941_wled_var_cfg pm8941_wled_switch_freq_cfg = { - .fn = pm8941_wled_switch_freq_values_fn, +static const struct wled_var_cfg wled3_switch_freq_cfg = { + .fn = wled3_switch_freq_values_fn, .size = 16, };

-static const struct pm8941_wled_var_cfg pm8941_wled_i_limit_cfg = { +static const struct wled_var_cfg wled3_string_i_limit_cfg = { .size = 26, };

-static u32 pm8941_wled_values(const struct pm8941_wled_var_cfg *cfg, u32 idx) +static u32 wled3_values(const struct wled_var_cfg *cfg, u32 idx) { if (idx >= cfg->size) return UINT_MAX; @@ -272,9 +274,9 @@ static u32 pm8941_wled_values(const struct pm8941_wled_var_cfg *cfg, u32 idx) return idx; }

-static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev) +static int wled_configure(struct wled *wled, struct device *dev) { - struct pm8941_wled_config *cfg = &wled->cfg; + struct wled_config *cfg = &wled->cfg; u32 val; int rc; u32 c; @@ -284,32 +286,32 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev) const struct { const char *name; u32 *val_ptr; - const struct pm8941_wled_var_cfg *cfg; + const struct wled_var_cfg *cfg; } u32_opts[] = { { "qcom,current-boost-limit", - &cfg->i_boost_limit, - .cfg = &pm8941_wled_i_boost_limit_cfg, + &cfg->boost_i_limit, + .cfg = &wled3_boost_i_limit_cfg, }, { "qcom,current-limit", - &cfg->i_limit, - .cfg = &pm8941_wled_i_limit_cfg, + &cfg->string_i_limit, + .cfg = &wled3_string_i_limit_cfg, }, { "qcom,ovp", &cfg->ovp, - .cfg = &pm8941_wled_ovp_cfg, + .cfg = &wled3_ovp_cfg, }, { "qcom,switching-freq", &cfg->switch_freq, - .cfg = &pm8941_wled_switch_freq_cfg, + .cfg = &wled3_switch_freq_cfg, }, { "qcom,num-strings", &cfg->num_strings, - .cfg = &pm8941_wled_num_strings_cfg, + .cfg = &wled3_num_strings_cfg, }, }; const struct { @@ -332,7 +334,7 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev) if (rc) wled->name = dev->of_node->name;

- *cfg = pm8941_wled_config_defaults; + *cfg = wled3_config_defaults; for (i = 0; i < ARRAY_SIZE(u32_opts); ++i) { rc = of_property_read_u32(dev->of_node, u32_opts[i].name, &val); if (rc == -EINVAL) { @@ -344,7 +346,7 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev)

c = UINT_MAX; for (j = 0; c != val; j++) { - c = pm8941_wled_values(u32_opts[i].cfg, j); + c = wled3_values(u32_opts[i].cfg, j); if (c == UINT_MAX) { dev_err(dev, "invalid value for '%s'\n", u32_opts[i].name); @@ -366,15 +368,15 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev) return 0; }

-static const struct backlight_ops pm8941_wled_ops = { - .update_status = pm8941_wled_update_status, +static const struct backlight_ops wled_ops = { + .update_status = wled_update_status, };

-static int pm8941_wled_probe(struct platform_device *pdev) +static int wled_probe(struct platform_device *pdev) { struct backlight_properties props; struct backlight_device *bl; - struct pm8941_wled *wled; + struct wled *wled; struct regmap *regmap; u32 val; int rc; @@ -391,42 +393,42 @@ static int pm8941_wled_probe(struct platform_device *pdev)

wled->regmap = regmap;

- rc = pm8941_wled_configure(wled, &pdev->dev); + rc = wled_configure(wled, &pdev->dev); if (rc) return rc;

- rc = pm8941_wled_setup(wled); + rc = wled_setup(wled); if (rc) return rc;

- val = PM8941_WLED_DEFAULT_BRIGHTNESS; + val = WLED_DEFAULT_BRIGHTNESS; of_property_read_u32(pdev->dev.of_node, "default-brightness", &val);

memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; props.brightness = val; - props.max_brightness = PM8941_WLED_REG_VAL_MAX; + props.max_brightness = WLED3_SINK_REG_BRIGHT_MAX; bl = devm_backlight_device_register(&pdev->dev, wled->name, &pdev->dev, wled, - &pm8941_wled_ops, &props); + &wled_ops, &props); return PTR_ERR_OR_ZERO(bl); };

-static const struct of_device_id pm8941_wled_match_table[] = { +static const struct of_device_id wled_match_table[] = { { .compatible = "qcom,pm8941-wled" }, {} }; -MODULE_DEVICE_TABLE(of, pm8941_wled_match_table); +MODULE_DEVICE_TABLE(of, wled_match_table);

-static struct platform_driver pm8941_wled_driver = { - .probe = pm8941_wled_probe, +static struct platform_driver wled_driver = { + .probe = wled_probe, .driver = { - .name = "pm8941-wled", - .of_match_table = pm8941_wled_match_table, + .name = "qcom,wled", + .of_match_table = wled_match_table, }, };

-module_platform_driver(pm8941_wled_driver); +module_platform_driver(wled_driver);

-MODULE_DESCRIPTION("pm8941 wled driver"); +MODULE_DESCRIPTION("Qualcomm WLED driver"); MODULE_LICENSE("GPL v2");