| Message ID | 1571220826-7740-5-git-send-email-kgunda@codeaurora.org (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | backlight: qcom-wled: Support for QCOM wled driver | expand |
On Wed, Oct 16, 2019 at 03:43:44PM +0530, Kiran Gunda wrote: > WLED4 peripheral is present on some PMICs like pmi8998 and > pm660l. It has a different register map and configurations > are also different. Add support for it. There is code buried in this patch that looks like it changes the name that will be handed to the backlight sub-system. It's purpose needs to be explained in the patch description (or the code moved to a new patch). Daniel. > > Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> > Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > --- > drivers/video/backlight/qcom-wled.c | 263 +++++++++++++++++++++++++++++++++++- > 1 file changed, 257 insertions(+), 6 deletions(-) > > diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c > index 45eeda4..2807b4b 100644 > --- a/drivers/video/backlight/qcom-wled.c > +++ b/drivers/video/backlight/qcom-wled.c > @@ -17,7 +17,7 @@ > > #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF > > -/* WLED3 control registers */ > +/* WLED3/WLED4 control registers */ > #define WLED3_CTRL_REG_MOD_EN 0x46 > #define WLED3_CTRL_REG_MOD_EN_MASK BIT(7) > #define WLED3_CTRL_REG_MOD_EN_SHIFT 7 > @@ -31,7 +31,7 @@ > #define WLED3_CTRL_REG_ILIMIT 0x4e > #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) > > -/* WLED3 sink registers */ > +/* WLED3/WLED4 sink registers */ > #define WLED3_SINK_REG_SYNC 0x47 > #define WLED3_SINK_REG_SYNC_CLEAR 0x00 > > @@ -56,6 +56,28 @@ > #define WLED3_SINK_REG_STR_CABC(n) (0x66 + (n * 0x10)) > #define WLED3_SINK_REG_STR_CABC_MASK BIT(7) > > +/* WLED4 specific sink registers */ > +#define WLED4_SINK_REG_CURR_SINK 0x46 > +#define WLED4_SINK_REG_CURR_SINK_MASK GENMASK(7, 4) > +#define WLED4_SINK_REG_CURR_SINK_SHFT 4 > + > +/* WLED4 specific per-'string' registers below */ > +#define WLED4_SINK_REG_STR_MOD_EN(n) (0x50 + (n * 0x10)) > +#define WLED4_SINK_REG_STR_MOD_MASK BIT(7) > + > +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR(n) (0x52 + (n * 0x10)) > +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(3, 0) > + > +#define WLED4_SINK_REG_STR_MOD_SRC(n) (0x53 + (n * 0x10)) > +#define WLED4_SINK_REG_STR_MOD_SRC_MASK BIT(0) > +#define WLED4_SINK_REG_STR_MOD_SRC_INT 0x00 > +#define WLED4_SINK_REG_STR_MOD_SRC_EXT 0x01 > + > +#define WLED4_SINK_REG_STR_CABC(n) (0x56 + (n * 0x10)) > +#define WLED4_SINK_REG_STR_CABC_MASK BIT(7) > + > +#define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) > + > struct wled_var_cfg { > const u32 *values; > u32 (*fn)(u32); > @@ -90,6 +112,7 @@ struct wled { > struct device *dev; > struct regmap *regmap; > u16 ctrl_addr; > + u16 sink_addr; > u16 max_string_count; > u32 brightness; > u32 max_brightness; > @@ -116,6 +139,29 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness) > return 0; > } > > +static int wled4_set_brightness(struct wled *wled, u16 brightness) > +{ > + int rc, i; > + u16 low_limit = wled->max_brightness * 4 / 1000; > + u8 v[2]; > + > + /* WLED4's lower limit of operation is 0.4% */ > + if (brightness > 0 && brightness < low_limit) > + brightness = low_limit; > + > + v[0] = brightness & 0xff; > + v[1] = (brightness >> 8) & 0xf; > + > + for (i = 0; i < wled->cfg.num_strings; ++i) { > + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + > + WLED4_SINK_REG_BRIGHT(i), v, 2); > + if (rc < 0) > + return rc; > + } > + > + return 0; > +} > + > static int wled_module_enable(struct wled *wled, int val) > { > int rc; > @@ -267,6 +313,120 @@ static int wled3_setup(struct wled *wled) > .enabled_strings = {0, 1, 2, 3}, > }; > > +static int wled4_setup(struct wled *wled) > +{ > + int rc, temp, i, j; > + u16 addr; > + u8 sink_en = 0; > + u32 sink_cfg = 0; > + > + rc = regmap_update_bits(wled->regmap, > + wled->ctrl_addr + WLED3_CTRL_REG_OVP, > + WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp); > + if (rc < 0) > + return rc; > + > + rc = regmap_update_bits(wled->regmap, > + wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT, > + WLED3_CTRL_REG_ILIMIT_MASK, > + wled->cfg.boost_i_limit); > + if (rc < 0) > + return rc; > + > + rc = regmap_update_bits(wled->regmap, > + wled->ctrl_addr + WLED3_CTRL_REG_FREQ, > + WLED3_CTRL_REG_FREQ_MASK, > + wled->cfg.switch_freq); > + if (rc < 0) > + return rc; > + > + rc = regmap_read(wled->regmap, wled->sink_addr + > + WLED4_SINK_REG_CURR_SINK, &sink_cfg); > + if (rc < 0) > + return rc; > + > + for (i = 0; i < wled->cfg.num_strings; i++) { > + j = wled->cfg.enabled_strings[i]; > + temp = j + WLED4_SINK_REG_CURR_SINK_SHFT; > + sink_en |= 1 << temp; > + } > + > + if (sink_cfg == sink_en) > + return 0; > + > + rc = regmap_update_bits(wled->regmap, > + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, > + WLED4_SINK_REG_CURR_SINK_MASK, 0); > + if (rc < 0) > + return rc; > + > + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + > + WLED3_CTRL_REG_MOD_EN, > + WLED3_CTRL_REG_MOD_EN_MASK, 0); > + if (rc < 0) > + return rc; > + > + /* Per sink/string configuration */ > + for (i = 0; i < wled->cfg.num_strings; i++) { > + j = wled->cfg.enabled_strings[i]; > + > + addr = wled->sink_addr + > + WLED4_SINK_REG_STR_MOD_EN(j); > + rc = regmap_update_bits(wled->regmap, addr, > + WLED4_SINK_REG_STR_MOD_MASK, > + WLED4_SINK_REG_STR_MOD_MASK); > + if (rc < 0) > + return rc; > + > + addr = wled->sink_addr + > + WLED4_SINK_REG_STR_FULL_SCALE_CURR(j); > + rc = regmap_update_bits(wled->regmap, addr, > + WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK, > + wled->cfg.string_i_limit); > + if (rc < 0) > + return rc; > + > + addr = wled->sink_addr + > + WLED4_SINK_REG_STR_CABC(j); > + rc = regmap_update_bits(wled->regmap, addr, > + WLED4_SINK_REG_STR_CABC_MASK, > + wled->cfg.cabc ? > + WLED4_SINK_REG_STR_CABC_MASK : 0); > + if (rc < 0) > + return rc; > + } > + > + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + > + WLED3_CTRL_REG_MOD_EN, > + WLED3_CTRL_REG_MOD_EN_MASK, > + WLED3_CTRL_REG_MOD_EN_MASK); > + if (rc < 0) > + return rc; > + > + rc = regmap_update_bits(wled->regmap, > + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, > + WLED4_SINK_REG_CURR_SINK_MASK, sink_en); > + if (rc < 0) > + return rc; > + > + rc = wled_sync_toggle(wled); > + if (rc < 0) { > + dev_err(wled->dev, "Failed to toggle sync reg rc:%d\n", rc); > + return rc; > + } > + > + return 0; > +} > + > +static const struct wled_config wled4_config_defaults = { > + .boost_i_limit = 4, > + .string_i_limit = 10, > + .ovp = 1, > + .num_strings = 4, > + .switch_freq = 11, > + .cabc = false, > +}; > + > static const u32 wled3_boost_i_limit_values[] = { > 105, 385, 525, 805, 980, 1260, 1400, 1680, > }; > @@ -276,6 +436,15 @@ static int wled3_setup(struct wled *wled) > .size = ARRAY_SIZE(wled3_boost_i_limit_values), > }; > > +static const u32 wled4_boost_i_limit_values[] = { > + 105, 280, 450, 620, 970, 1150, 1300, 1500, > +}; > + > +static const struct wled_var_cfg wled4_boost_i_limit_cfg = { > + .values = wled4_boost_i_limit_values, > + .size = ARRAY_SIZE(wled4_boost_i_limit_values), > +}; > + > static const u32 wled3_ovp_values[] = { > 35, 32, 29, 27, > }; > @@ -285,6 +454,15 @@ static int wled3_setup(struct wled *wled) > .size = ARRAY_SIZE(wled3_ovp_values), > }; > > +static const u32 wled4_ovp_values[] = { > + 31100, 29600, 19600, 18100, > +}; > + > +static const struct wled_var_cfg wled4_ovp_cfg = { > + .values = wled4_ovp_values, > + .size = ARRAY_SIZE(wled4_ovp_values), > +}; > + > static u32 wled3_num_strings_values_fn(u32 idx) > { > return idx + 1; > @@ -295,6 +473,11 @@ static u32 wled3_num_strings_values_fn(u32 idx) > .size = 3, > }; > > +static const struct wled_var_cfg wled4_num_strings_cfg = { > + .fn = wled3_num_strings_values_fn, > + .size = 4, > +}; > + > static u32 wled3_switch_freq_values_fn(u32 idx) > { > return 19200 / (2 * (1 + idx)); > @@ -309,10 +492,24 @@ static u32 wled3_switch_freq_values_fn(u32 idx) > .size = 26, > }; > > +static const u32 wled4_string_i_limit_values[] = { > + 0, 2500, 5000, 7500, 10000, 12500, 15000, 17500, 20000, > + 22500, 25000, 27500, 30000, > +}; > + > +static const struct wled_var_cfg wled4_string_i_limit_cfg = { > + .values = wled4_string_i_limit_values, > + .size = ARRAY_SIZE(wled4_string_i_limit_values), > +}; > + > static const struct wled_var_cfg wled3_string_cfg = { > .size = 8, > }; > > +static const struct wled_var_cfg wled4_string_cfg = { > + .size = 16, > +}; > + > static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx) > { > if (idx >= cfg->size) > @@ -361,6 +558,34 @@ static int wled_configure(struct wled *wled, int version) > }, > }; > > + const struct wled_u32_opts wled4_opts[] = { > + { > + .name = "qcom,current-boost-limit", > + .val_ptr = &cfg->boost_i_limit, > + .cfg = &wled4_boost_i_limit_cfg, > + }, > + { > + .name = "qcom,current-limit-microamp", > + .val_ptr = &cfg->string_i_limit, > + .cfg = &wled4_string_i_limit_cfg, > + }, > + { > + .name = "qcom,ovp-millivolt", > + .val_ptr = &cfg->ovp, > + .cfg = &wled4_ovp_cfg, > + }, > + { > + .name = "qcom,switching-freq", > + .val_ptr = &cfg->switch_freq, > + .cfg = &wled3_switch_freq_cfg, > + }, > + { > + .name = "qcom,num-strings", > + .val_ptr = &cfg->num_strings, > + .cfg = &wled4_num_strings_cfg, > + }, > + }; > + > const struct wled_bool_opts bool_opts[] = { > { "qcom,cs-out", &cfg->cs_out_en, }, > { "qcom,ext-gen", &cfg->ext_gen, }, > @@ -374,10 +599,6 @@ static int wled_configure(struct wled *wled, int version) > } > wled->ctrl_addr = be32_to_cpu(*prop_addr); > > - rc = of_property_read_string(dev->of_node, "label", &wled->name); > - if (rc) > - wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); > - > switch (version) { > case 3: > u32_opts = wled3_opts; > @@ -385,6 +606,22 @@ static int wled_configure(struct wled *wled, int version) > *cfg = wled3_config_defaults; > wled->wled_set_brightness = wled3_set_brightness; > wled->max_string_count = 3; > + wled->sink_addr = wled->ctrl_addr; > + break; > + > + case 4: > + u32_opts = wled4_opts; > + size = ARRAY_SIZE(wled4_opts); > + *cfg = wled4_config_defaults; > + wled->wled_set_brightness = wled4_set_brightness; > + wled->max_string_count = 4; > + > + prop_addr = of_get_address(dev->of_node, 1, NULL, NULL); > + if (!prop_addr) { > + dev_err(wled->dev, "invalid IO resources\n"); > + return -EINVAL; > + } > + wled->sink_addr = be32_to_cpu(*prop_addr); > break; > > default: > @@ -392,6 +629,10 @@ static int wled_configure(struct wled *wled, int version) > return -EINVAL; > } > > + rc = of_property_read_string(dev->of_node, "label", &wled->name); > + if (rc) > + wled->name = dev->of_node->name; > + > for (i = 0; i < size; ++i) { > rc = of_property_read_u32(dev->of_node, u32_opts[i].name, &val); > if (rc == -EINVAL) { > @@ -483,6 +724,14 @@ static int wled_probe(struct platform_device *pdev) > } > break; > > + case 4: > + rc = wled4_setup(wled); > + if (rc) { > + dev_err(&pdev->dev, "wled4_setup failed\n"); > + return rc; > + } > + break; > + > default: > dev_err(wled->dev, "Invalid WLED version\n"); > break; > @@ -503,6 +752,8 @@ static int wled_probe(struct platform_device *pdev) > > static const struct of_device_id wled_match_table[] = { > { .compatible = "qcom,pm8941-wled", .data = (void *)3 }, > + { .compatible = "qcom,pmi8998-wled", .data = (void *)4 }, > + { .compatible = "qcom,pm660l-wled", .data = (void *)4 }, > {} > }; > MODULE_DEVICE_TABLE(of, wled_match_table); > -- > The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, > a Linux Foundation Collaborative Project >
On 2019-10-17 16:36, Daniel Thompson wrote: > On Wed, Oct 16, 2019 at 03:43:44PM +0530, Kiran Gunda wrote: >> WLED4 peripheral is present on some PMICs like pmi8998 and >> pm660l. It has a different register map and configurations >> are also different. Add support for it. > > There is code buried in this patch that looks like it changes the name > that will be handed to the backlight sub-system. > > It's purpose needs to be explained in the patch description (or the > code > moved to a new patch). > I will address it in next series. > > Daniel. > >> >> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> >> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> >> --- >> drivers/video/backlight/qcom-wled.c | 263 >> +++++++++++++++++++++++++++++++++++- >> 1 file changed, 257 insertions(+), 6 deletions(-) >> >> diff --git a/drivers/video/backlight/qcom-wled.c >> b/drivers/video/backlight/qcom-wled.c >> index 45eeda4..2807b4b 100644 >> --- a/drivers/video/backlight/qcom-wled.c >> +++ b/drivers/video/backlight/qcom-wled.c >> @@ -17,7 +17,7 @@ >> >> #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF >> >> -/* WLED3 control registers */ >> +/* WLED3/WLED4 control registers */ >> #define WLED3_CTRL_REG_MOD_EN 0x46 >> #define WLED3_CTRL_REG_MOD_EN_MASK BIT(7) >> #define WLED3_CTRL_REG_MOD_EN_SHIFT 7 >> @@ -31,7 +31,7 @@ >> #define WLED3_CTRL_REG_ILIMIT 0x4e >> #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) >> >> -/* WLED3 sink registers */ >> +/* WLED3/WLED4 sink registers */ >> #define WLED3_SINK_REG_SYNC 0x47 >> #define WLED3_SINK_REG_SYNC_CLEAR 0x00 >> >> @@ -56,6 +56,28 @@ >> #define WLED3_SINK_REG_STR_CABC(n) (0x66 + (n * 0x10)) >> #define WLED3_SINK_REG_STR_CABC_MASK BIT(7) >> >> +/* WLED4 specific sink registers */ >> +#define WLED4_SINK_REG_CURR_SINK 0x46 >> +#define WLED4_SINK_REG_CURR_SINK_MASK GENMASK(7, 4) >> +#define WLED4_SINK_REG_CURR_SINK_SHFT 4 >> + >> +/* WLED4 specific per-'string' registers below */ >> +#define WLED4_SINK_REG_STR_MOD_EN(n) (0x50 + (n * 0x10)) >> +#define WLED4_SINK_REG_STR_MOD_MASK BIT(7) >> + >> +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR(n) (0x52 + (n * 0x10)) >> +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(3, 0) >> + >> +#define WLED4_SINK_REG_STR_MOD_SRC(n) (0x53 + (n * 0x10)) >> +#define WLED4_SINK_REG_STR_MOD_SRC_MASK BIT(0) >> +#define WLED4_SINK_REG_STR_MOD_SRC_INT 0x00 >> +#define WLED4_SINK_REG_STR_MOD_SRC_EXT 0x01 >> + >> +#define WLED4_SINK_REG_STR_CABC(n) (0x56 + (n * 0x10)) >> +#define WLED4_SINK_REG_STR_CABC_MASK BIT(7) >> + >> +#define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) >> + >> struct wled_var_cfg { >> const u32 *values; >> u32 (*fn)(u32); >> @@ -90,6 +112,7 @@ struct wled { >> struct device *dev; >> struct regmap *regmap; >> u16 ctrl_addr; >> + u16 sink_addr; >> u16 max_string_count; >> u32 brightness; >> u32 max_brightness; >> @@ -116,6 +139,29 @@ static int wled3_set_brightness(struct wled >> *wled, u16 brightness) >> return 0; >> } >> >> +static int wled4_set_brightness(struct wled *wled, u16 brightness) >> +{ >> + int rc, i; >> + u16 low_limit = wled->max_brightness * 4 / 1000; >> + u8 v[2]; >> + >> + /* WLED4's lower limit of operation is 0.4% */ >> + if (brightness > 0 && brightness < low_limit) >> + brightness = low_limit; >> + >> + v[0] = brightness & 0xff; >> + v[1] = (brightness >> 8) & 0xf; >> + >> + for (i = 0; i < wled->cfg.num_strings; ++i) { >> + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + >> + WLED4_SINK_REG_BRIGHT(i), v, 2); >> + if (rc < 0) >> + return rc; >> + } >> + >> + return 0; >> +} >> + >> static int wled_module_enable(struct wled *wled, int val) >> { >> int rc; >> @@ -267,6 +313,120 @@ static int wled3_setup(struct wled *wled) >> .enabled_strings = {0, 1, 2, 3}, >> }; >> >> +static int wled4_setup(struct wled *wled) >> +{ >> + int rc, temp, i, j; >> + u16 addr; >> + u8 sink_en = 0; >> + u32 sink_cfg = 0; >> + >> + rc = regmap_update_bits(wled->regmap, >> + wled->ctrl_addr + WLED3_CTRL_REG_OVP, >> + WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp); >> + if (rc < 0) >> + return rc; >> + >> + rc = regmap_update_bits(wled->regmap, >> + wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT, >> + WLED3_CTRL_REG_ILIMIT_MASK, >> + wled->cfg.boost_i_limit); >> + if (rc < 0) >> + return rc; >> + >> + rc = regmap_update_bits(wled->regmap, >> + wled->ctrl_addr + WLED3_CTRL_REG_FREQ, >> + WLED3_CTRL_REG_FREQ_MASK, >> + wled->cfg.switch_freq); >> + if (rc < 0) >> + return rc; >> + >> + rc = regmap_read(wled->regmap, wled->sink_addr + >> + WLED4_SINK_REG_CURR_SINK, &sink_cfg); >> + if (rc < 0) >> + return rc; >> + >> + for (i = 0; i < wled->cfg.num_strings; i++) { >> + j = wled->cfg.enabled_strings[i]; >> + temp = j + WLED4_SINK_REG_CURR_SINK_SHFT; >> + sink_en |= 1 << temp; >> + } >> + >> + if (sink_cfg == sink_en) >> + return 0; >> + >> + rc = regmap_update_bits(wled->regmap, >> + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, >> + WLED4_SINK_REG_CURR_SINK_MASK, 0); >> + if (rc < 0) >> + return rc; >> + >> + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + >> + WLED3_CTRL_REG_MOD_EN, >> + WLED3_CTRL_REG_MOD_EN_MASK, 0); >> + if (rc < 0) >> + return rc; >> + >> + /* Per sink/string configuration */ >> + for (i = 0; i < wled->cfg.num_strings; i++) { >> + j = wled->cfg.enabled_strings[i]; >> + >> + addr = wled->sink_addr + >> + WLED4_SINK_REG_STR_MOD_EN(j); >> + rc = regmap_update_bits(wled->regmap, addr, >> + WLED4_SINK_REG_STR_MOD_MASK, >> + WLED4_SINK_REG_STR_MOD_MASK); >> + if (rc < 0) >> + return rc; >> + >> + addr = wled->sink_addr + >> + WLED4_SINK_REG_STR_FULL_SCALE_CURR(j); >> + rc = regmap_update_bits(wled->regmap, addr, >> + WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK, >> + wled->cfg.string_i_limit); >> + if (rc < 0) >> + return rc; >> + >> + addr = wled->sink_addr + >> + WLED4_SINK_REG_STR_CABC(j); >> + rc = regmap_update_bits(wled->regmap, addr, >> + WLED4_SINK_REG_STR_CABC_MASK, >> + wled->cfg.cabc ? >> + WLED4_SINK_REG_STR_CABC_MASK : 0); >> + if (rc < 0) >> + return rc; >> + } >> + >> + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + >> + WLED3_CTRL_REG_MOD_EN, >> + WLED3_CTRL_REG_MOD_EN_MASK, >> + WLED3_CTRL_REG_MOD_EN_MASK); >> + if (rc < 0) >> + return rc; >> + >> + rc = regmap_update_bits(wled->regmap, >> + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, >> + WLED4_SINK_REG_CURR_SINK_MASK, sink_en); >> + if (rc < 0) >> + return rc; >> + >> + rc = wled_sync_toggle(wled); >> + if (rc < 0) { >> + dev_err(wled->dev, "Failed to toggle sync reg rc:%d\n", rc); >> + return rc; >> + } >> + >> + return 0; >> +} >> + >> +static const struct wled_config wled4_config_defaults = { >> + .boost_i_limit = 4, >> + .string_i_limit = 10, >> + .ovp = 1, >> + .num_strings = 4, >> + .switch_freq = 11, >> + .cabc = false, >> +}; >> + >> static const u32 wled3_boost_i_limit_values[] = { >> 105, 385, 525, 805, 980, 1260, 1400, 1680, >> }; >> @@ -276,6 +436,15 @@ static int wled3_setup(struct wled *wled) >> .size = ARRAY_SIZE(wled3_boost_i_limit_values), >> }; >> >> +static const u32 wled4_boost_i_limit_values[] = { >> + 105, 280, 450, 620, 970, 1150, 1300, 1500, >> +}; >> + >> +static const struct wled_var_cfg wled4_boost_i_limit_cfg = { >> + .values = wled4_boost_i_limit_values, >> + .size = ARRAY_SIZE(wled4_boost_i_limit_values), >> +}; >> + >> static const u32 wled3_ovp_values[] = { >> 35, 32, 29, 27, >> }; >> @@ -285,6 +454,15 @@ static int wled3_setup(struct wled *wled) >> .size = ARRAY_SIZE(wled3_ovp_values), >> }; >> >> +static const u32 wled4_ovp_values[] = { >> + 31100, 29600, 19600, 18100, >> +}; >> + >> +static const struct wled_var_cfg wled4_ovp_cfg = { >> + .values = wled4_ovp_values, >> + .size = ARRAY_SIZE(wled4_ovp_values), >> +}; >> + >> static u32 wled3_num_strings_values_fn(u32 idx) >> { >> return idx + 1; >> @@ -295,6 +473,11 @@ static u32 wled3_num_strings_values_fn(u32 idx) >> .size = 3, >> }; >> >> +static const struct wled_var_cfg wled4_num_strings_cfg = { >> + .fn = wled3_num_strings_values_fn, >> + .size = 4, >> +}; >> + >> static u32 wled3_switch_freq_values_fn(u32 idx) >> { >> return 19200 / (2 * (1 + idx)); >> @@ -309,10 +492,24 @@ static u32 wled3_switch_freq_values_fn(u32 idx) >> .size = 26, >> }; >> >> +static const u32 wled4_string_i_limit_values[] = { >> + 0, 2500, 5000, 7500, 10000, 12500, 15000, 17500, 20000, >> + 22500, 25000, 27500, 30000, >> +}; >> + >> +static const struct wled_var_cfg wled4_string_i_limit_cfg = { >> + .values = wled4_string_i_limit_values, >> + .size = ARRAY_SIZE(wled4_string_i_limit_values), >> +}; >> + >> static const struct wled_var_cfg wled3_string_cfg = { >> .size = 8, >> }; >> >> +static const struct wled_var_cfg wled4_string_cfg = { >> + .size = 16, >> +}; >> + >> static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx) >> { >> if (idx >= cfg->size) >> @@ -361,6 +558,34 @@ static int wled_configure(struct wled *wled, int >> version) >> }, >> }; >> >> + const struct wled_u32_opts wled4_opts[] = { >> + { >> + .name = "qcom,current-boost-limit", >> + .val_ptr = &cfg->boost_i_limit, >> + .cfg = &wled4_boost_i_limit_cfg, >> + }, >> + { >> + .name = "qcom,current-limit-microamp", >> + .val_ptr = &cfg->string_i_limit, >> + .cfg = &wled4_string_i_limit_cfg, >> + }, >> + { >> + .name = "qcom,ovp-millivolt", >> + .val_ptr = &cfg->ovp, >> + .cfg = &wled4_ovp_cfg, >> + }, >> + { >> + .name = "qcom,switching-freq", >> + .val_ptr = &cfg->switch_freq, >> + .cfg = &wled3_switch_freq_cfg, >> + }, >> + { >> + .name = "qcom,num-strings", >> + .val_ptr = &cfg->num_strings, >> + .cfg = &wled4_num_strings_cfg, >> + }, >> + }; >> + >> const struct wled_bool_opts bool_opts[] = { >> { "qcom,cs-out", &cfg->cs_out_en, }, >> { "qcom,ext-gen", &cfg->ext_gen, }, >> @@ -374,10 +599,6 @@ static int wled_configure(struct wled *wled, int >> version) >> } >> wled->ctrl_addr = be32_to_cpu(*prop_addr); >> >> - rc = of_property_read_string(dev->of_node, "label", &wled->name); >> - if (rc) >> - wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", >> dev->of_node); >> - >> switch (version) { >> case 3: >> u32_opts = wled3_opts; >> @@ -385,6 +606,22 @@ static int wled_configure(struct wled *wled, int >> version) >> *cfg = wled3_config_defaults; >> wled->wled_set_brightness = wled3_set_brightness; >> wled->max_string_count = 3; >> + wled->sink_addr = wled->ctrl_addr; >> + break; >> + >> + case 4: >> + u32_opts = wled4_opts; >> + size = ARRAY_SIZE(wled4_opts); >> + *cfg = wled4_config_defaults; >> + wled->wled_set_brightness = wled4_set_brightness; >> + wled->max_string_count = 4; >> + >> + prop_addr = of_get_address(dev->of_node, 1, NULL, NULL); >> + if (!prop_addr) { >> + dev_err(wled->dev, "invalid IO resources\n"); >> + return -EINVAL; >> + } >> + wled->sink_addr = be32_to_cpu(*prop_addr); >> break; >> >> default: >> @@ -392,6 +629,10 @@ static int wled_configure(struct wled *wled, int >> version) >> return -EINVAL; >> } >> >> + rc = of_property_read_string(dev->of_node, "label", &wled->name); >> + if (rc) >> + wled->name = dev->of_node->name; >> + >> for (i = 0; i < size; ++i) { >> rc = of_property_read_u32(dev->of_node, u32_opts[i].name, &val); >> if (rc == -EINVAL) { >> @@ -483,6 +724,14 @@ static int wled_probe(struct platform_device >> *pdev) >> } >> break; >> >> + case 4: >> + rc = wled4_setup(wled); >> + if (rc) { >> + dev_err(&pdev->dev, "wled4_setup failed\n"); >> + return rc; >> + } >> + break; >> + >> default: >> dev_err(wled->dev, "Invalid WLED version\n"); >> break; >> @@ -503,6 +752,8 @@ static int wled_probe(struct platform_device >> *pdev) >> >> static const struct of_device_id wled_match_table[] = { >> { .compatible = "qcom,pm8941-wled", .data = (void *)3 }, >> + { .compatible = "qcom,pmi8998-wled", .data = (void *)4 }, >> + { .compatible = "qcom,pm660l-wled", .data = (void *)4 }, >> {} >> }; >> MODULE_DEVICE_TABLE(of, wled_match_table); >> -- >> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora >> Forum, >> a Linux Foundation Collaborative Project >>
diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 45eeda4..2807b4b 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -17,7 +17,7 @@ #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF -/* WLED3 control registers */ +/* WLED3/WLED4 control registers */ #define WLED3_CTRL_REG_MOD_EN 0x46 #define WLED3_CTRL_REG_MOD_EN_MASK BIT(7) #define WLED3_CTRL_REG_MOD_EN_SHIFT 7 @@ -31,7 +31,7 @@ #define WLED3_CTRL_REG_ILIMIT 0x4e #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) -/* WLED3 sink registers */ +/* WLED3/WLED4 sink registers */ #define WLED3_SINK_REG_SYNC 0x47 #define WLED3_SINK_REG_SYNC_CLEAR 0x00 @@ -56,6 +56,28 @@ #define WLED3_SINK_REG_STR_CABC(n) (0x66 + (n * 0x10)) #define WLED3_SINK_REG_STR_CABC_MASK BIT(7) +/* WLED4 specific sink registers */ +#define WLED4_SINK_REG_CURR_SINK 0x46 +#define WLED4_SINK_REG_CURR_SINK_MASK GENMASK(7, 4) +#define WLED4_SINK_REG_CURR_SINK_SHFT 4 + +/* WLED4 specific per-'string' registers below */ +#define WLED4_SINK_REG_STR_MOD_EN(n) (0x50 + (n * 0x10)) +#define WLED4_SINK_REG_STR_MOD_MASK BIT(7) + +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR(n) (0x52 + (n * 0x10)) +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(3, 0) + +#define WLED4_SINK_REG_STR_MOD_SRC(n) (0x53 + (n * 0x10)) +#define WLED4_SINK_REG_STR_MOD_SRC_MASK BIT(0) +#define WLED4_SINK_REG_STR_MOD_SRC_INT 0x00 +#define WLED4_SINK_REG_STR_MOD_SRC_EXT 0x01 + +#define WLED4_SINK_REG_STR_CABC(n) (0x56 + (n * 0x10)) +#define WLED4_SINK_REG_STR_CABC_MASK BIT(7) + +#define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) + struct wled_var_cfg { const u32 *values; u32 (*fn)(u32); @@ -90,6 +112,7 @@ struct wled { struct device *dev; struct regmap *regmap; u16 ctrl_addr; + u16 sink_addr; u16 max_string_count; u32 brightness; u32 max_brightness; @@ -116,6 +139,29 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness) return 0; } +static int wled4_set_brightness(struct wled *wled, u16 brightness) +{ + int rc, i; + u16 low_limit = wled->max_brightness * 4 / 1000; + u8 v[2]; + + /* WLED4's lower limit of operation is 0.4% */ + if (brightness > 0 && brightness < low_limit) + brightness = low_limit; + + v[0] = brightness & 0xff; + v[1] = (brightness >> 8) & 0xf; + + for (i = 0; i < wled->cfg.num_strings; ++i) { + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + + WLED4_SINK_REG_BRIGHT(i), v, 2); + if (rc < 0) + return rc; + } + + return 0; +} + static int wled_module_enable(struct wled *wled, int val) { int rc; @@ -267,6 +313,120 @@ static int wled3_setup(struct wled *wled) .enabled_strings = {0, 1, 2, 3}, }; +static int wled4_setup(struct wled *wled) +{ + int rc, temp, i, j; + u16 addr; + u8 sink_en = 0; + u32 sink_cfg = 0; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_OVP, + WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT, + WLED3_CTRL_REG_ILIMIT_MASK, + wled->cfg.boost_i_limit); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_FREQ, + WLED3_CTRL_REG_FREQ_MASK, + wled->cfg.switch_freq); + if (rc < 0) + return rc; + + rc = regmap_read(wled->regmap, wled->sink_addr + + WLED4_SINK_REG_CURR_SINK, &sink_cfg); + if (rc < 0) + return rc; + + for (i = 0; i < wled->cfg.num_strings; i++) { + j = wled->cfg.enabled_strings[i]; + temp = j + WLED4_SINK_REG_CURR_SINK_SHFT; + sink_en |= 1 << temp; + } + + if (sink_cfg == sink_en) + return 0; + + rc = regmap_update_bits(wled->regmap, + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, + WLED4_SINK_REG_CURR_SINK_MASK, 0); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + + WLED3_CTRL_REG_MOD_EN, + WLED3_CTRL_REG_MOD_EN_MASK, 0); + if (rc < 0) + return rc; + + /* Per sink/string configuration */ + for (i = 0; i < wled->cfg.num_strings; i++) { + j = wled->cfg.enabled_strings[i]; + + addr = wled->sink_addr + + WLED4_SINK_REG_STR_MOD_EN(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED4_SINK_REG_STR_MOD_MASK, + WLED4_SINK_REG_STR_MOD_MASK); + if (rc < 0) + return rc; + + addr = wled->sink_addr + + WLED4_SINK_REG_STR_FULL_SCALE_CURR(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK, + wled->cfg.string_i_limit); + if (rc < 0) + return rc; + + addr = wled->sink_addr + + WLED4_SINK_REG_STR_CABC(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED4_SINK_REG_STR_CABC_MASK, + wled->cfg.cabc ? + WLED4_SINK_REG_STR_CABC_MASK : 0); + if (rc < 0) + return rc; + } + + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + + WLED3_CTRL_REG_MOD_EN, + WLED3_CTRL_REG_MOD_EN_MASK, + WLED3_CTRL_REG_MOD_EN_MASK); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, + WLED4_SINK_REG_CURR_SINK_MASK, sink_en); + if (rc < 0) + return rc; + + rc = wled_sync_toggle(wled); + if (rc < 0) { + dev_err(wled->dev, "Failed to toggle sync reg rc:%d\n", rc); + return rc; + } + + return 0; +} + +static const struct wled_config wled4_config_defaults = { + .boost_i_limit = 4, + .string_i_limit = 10, + .ovp = 1, + .num_strings = 4, + .switch_freq = 11, + .cabc = false, +}; + static const u32 wled3_boost_i_limit_values[] = { 105, 385, 525, 805, 980, 1260, 1400, 1680, }; @@ -276,6 +436,15 @@ static int wled3_setup(struct wled *wled) .size = ARRAY_SIZE(wled3_boost_i_limit_values), }; +static const u32 wled4_boost_i_limit_values[] = { + 105, 280, 450, 620, 970, 1150, 1300, 1500, +}; + +static const struct wled_var_cfg wled4_boost_i_limit_cfg = { + .values = wled4_boost_i_limit_values, + .size = ARRAY_SIZE(wled4_boost_i_limit_values), +}; + static const u32 wled3_ovp_values[] = { 35, 32, 29, 27, }; @@ -285,6 +454,15 @@ static int wled3_setup(struct wled *wled) .size = ARRAY_SIZE(wled3_ovp_values), }; +static const u32 wled4_ovp_values[] = { + 31100, 29600, 19600, 18100, +}; + +static const struct wled_var_cfg wled4_ovp_cfg = { + .values = wled4_ovp_values, + .size = ARRAY_SIZE(wled4_ovp_values), +}; + static u32 wled3_num_strings_values_fn(u32 idx) { return idx + 1; @@ -295,6 +473,11 @@ static u32 wled3_num_strings_values_fn(u32 idx) .size = 3, }; +static const struct wled_var_cfg wled4_num_strings_cfg = { + .fn = wled3_num_strings_values_fn, + .size = 4, +}; + static u32 wled3_switch_freq_values_fn(u32 idx) { return 19200 / (2 * (1 + idx)); @@ -309,10 +492,24 @@ static u32 wled3_switch_freq_values_fn(u32 idx) .size = 26, }; +static const u32 wled4_string_i_limit_values[] = { + 0, 2500, 5000, 7500, 10000, 12500, 15000, 17500, 20000, + 22500, 25000, 27500, 30000, +}; + +static const struct wled_var_cfg wled4_string_i_limit_cfg = { + .values = wled4_string_i_limit_values, + .size = ARRAY_SIZE(wled4_string_i_limit_values), +}; + static const struct wled_var_cfg wled3_string_cfg = { .size = 8, }; +static const struct wled_var_cfg wled4_string_cfg = { + .size = 16, +}; + static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx) { if (idx >= cfg->size) @@ -361,6 +558,34 @@ static int wled_configure(struct wled *wled, int version) }, }; + const struct wled_u32_opts wled4_opts[] = { + { + .name = "qcom,current-boost-limit", + .val_ptr = &cfg->boost_i_limit, + .cfg = &wled4_boost_i_limit_cfg, + }, + { + .name = "qcom,current-limit-microamp", + .val_ptr = &cfg->string_i_limit, + .cfg = &wled4_string_i_limit_cfg, + }, + { + .name = "qcom,ovp-millivolt", + .val_ptr = &cfg->ovp, + .cfg = &wled4_ovp_cfg, + }, + { + .name = "qcom,switching-freq", + .val_ptr = &cfg->switch_freq, + .cfg = &wled3_switch_freq_cfg, + }, + { + .name = "qcom,num-strings", + .val_ptr = &cfg->num_strings, + .cfg = &wled4_num_strings_cfg, + }, + }; + const struct wled_bool_opts bool_opts[] = { { "qcom,cs-out", &cfg->cs_out_en, }, { "qcom,ext-gen", &cfg->ext_gen, }, @@ -374,10 +599,6 @@ static int wled_configure(struct wled *wled, int version) } wled->ctrl_addr = be32_to_cpu(*prop_addr); - rc = of_property_read_string(dev->of_node, "label", &wled->name); - if (rc) - wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node); - switch (version) { case 3: u32_opts = wled3_opts; @@ -385,6 +606,22 @@ static int wled_configure(struct wled *wled, int version) *cfg = wled3_config_defaults; wled->wled_set_brightness = wled3_set_brightness; wled->max_string_count = 3; + wled->sink_addr = wled->ctrl_addr; + break; + + case 4: + u32_opts = wled4_opts; + size = ARRAY_SIZE(wled4_opts); + *cfg = wled4_config_defaults; + wled->wled_set_brightness = wled4_set_brightness; + wled->max_string_count = 4; + + prop_addr = of_get_address(dev->of_node, 1, NULL, NULL); + if (!prop_addr) { + dev_err(wled->dev, "invalid IO resources\n"); + return -EINVAL; + } + wled->sink_addr = be32_to_cpu(*prop_addr); break; default: @@ -392,6 +629,10 @@ static int wled_configure(struct wled *wled, int version) return -EINVAL; } + rc = of_property_read_string(dev->of_node, "label", &wled->name); + if (rc) + wled->name = dev->of_node->name; + for (i = 0; i < size; ++i) { rc = of_property_read_u32(dev->of_node, u32_opts[i].name, &val); if (rc == -EINVAL) { @@ -483,6 +724,14 @@ static int wled_probe(struct platform_device *pdev) } break; + case 4: + rc = wled4_setup(wled); + if (rc) { + dev_err(&pdev->dev, "wled4_setup failed\n"); + return rc; + } + break; + default: dev_err(wled->dev, "Invalid WLED version\n"); break; @@ -503,6 +752,8 @@ static int wled_probe(struct platform_device *pdev) static const struct of_device_id wled_match_table[] = { { .compatible = "qcom,pm8941-wled", .data = (void *)3 }, + { .compatible = "qcom,pmi8998-wled", .data = (void *)4 }, + { .compatible = "qcom,pm660l-wled", .data = (void *)4 }, {} }; MODULE_DEVICE_TABLE(of, wled_match_table);