Re: [PATCH V4 4/8] backlight: qcom-wled: Rename PM8941* to WLED3

kgunda
2018-08-16T05:30:54Z

On 2018-08-07 11:11, Bjorn Andersson wrote:
> On Mon 09 Jul 03:22 PDT 2018, Kiran Gunda wrote:
>
>> Rename the PM8941* references as WLED3 to make the
>> driver generic and have WLED support for other PMICs.
>>
>> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
>
> I agree with Daniel, regarding the mentioning of the variable rename.
>
Yes. As Daniel asked I will update the commit text.

> Apart from that:
>
> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
>
> Regards,
> Bjorn
>
>> ---
>> Changes from V3:
>> - Changed the MODULE_DESCRIPTION
>>
>> 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");
>> --
>> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
>> Forum,
>> a Linux Foundation Collaborative Project
>>
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