| Message ID | 1583760362-26978-4-git-send-email-kgunda@codeaurora.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for WLED5 | expand |
On Mon, Mar 09, 2020 at 06:56:01PM +0530, Kiran Gunda wrote: > Add support for WLED5 peripheral that is present on PM8150L PMICs. > > PM8150L WLED supports the following: > - Two modulators and each sink can use any of the modulator > - Multiple CABC selection options > - Multiple brightness width selection (12 bits to 15 bits) > > Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> Mostly just style comments below... > --- > .../bindings/leds/backlight/qcom-wled.yaml | 39 +++ > drivers/video/backlight/qcom-wled.c | 336 ++++++++++++++++++++- Shouldn't the bindings and driver be separate? > 2 files changed, 374 insertions(+), 1 deletion(-) > > diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml > index d334f81..e0dadc4 100644 > --- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml > +++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml > @@ -20,6 +20,7 @@ properties: > - qcom,pm8941-wled > - qcom,pmi8998-wled > - qcom,pm660l-wled > + - qcom,pm8150l-wled > > reg: > maxItems: 1 > @@ -28,10 +29,23 @@ properties: > maxItems: 1 > description: > brightness value on boot, value from 0-4095. > + For pm8150l this value vary from 0-4095 or 0-32767 > + depending on the brightness control mode. If CABC is > + enabled 0-4095 range is used. Is this a pm8150l restriction or a WLED5 restriction (will other WLED5 have different ranges)? > allOf: > - $ref: /schemas/types.yaml#/definitions/uint32 > default: 2048 > > + max-brightness: > + maxItems: 1 > + description: > + Maximum brightness level. Allowed values are, > + for pmi8998 it is 0-4095. > + For pm8150l, this can be either 4095 or 32767. Ditto. > + If CABC is enabled, this is capped to 4095. > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + > label: > maxItems: 1 > description: > @@ -124,6 +138,31 @@ properties: > value for PM8941 from 1 to 3. Default 2 > For PMI8998 from 1 to 4. > > + qcom,modulator-sel: > + maxItems: 1 > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + Selects the modulator used for brightness modulation. > + Allowed values are, > + 0 - Modulator A > + 1 - Modulator B > + If not specified, then modulator A will be used by default. > + This property is applicable only to WLED5 peripheral. > + > + qcom,cabc-sel: > + maxItems: 1 > + allOf: > + - $ref: /schemas/types.yaml#/definitions/uint32 > + description: > + Selects the CABC pin signal used for brightness modulation. > + Allowed values are, > + 0 - CABC disabled > + 1 - CABC 1 > + 2 - CABC 2 > + 3 - External signal (e.g. LPG) is used for dimming > + This property is applicable only to WLED5 peripheral. > + > interrupts: > maxItems: 2 > description: > diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c > index b73f273..edbbcb2 100644 > --- a/drivers/video/backlight/qcom-wled.c > +++ b/drivers/video/backlight/qcom-wled.c > @@ -19,6 +19,8 @@ > #define WLED_DEFAULT_BRIGHTNESS 2048 > #define WLED_SOFT_START_DLY_US 10000 > #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF > +#define WLED5_SINK_REG_BRIGHT_MAX_12B 0xFFF > +#define WLED5_SINK_REG_BRIGHT_MAX_15B 0x7FFF > > /* WLED3/WLED4 control registers */ > #define WLED3_CTRL_REG_FAULT_STATUS 0x08 > @@ -40,6 +42,7 @@ > > #define WLED3_CTRL_REG_OVP 0x4d > #define WLED3_CTRL_REG_OVP_MASK GENMASK(1, 0) > +#define WLED5_CTRL_REG_OVP_MASK GENMASK(3, 0) > > #define WLED3_CTRL_REG_ILIMIT 0x4e > #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) > @@ -101,6 +104,40 @@ > > #define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) > > +/* WLED5 specific sink registers */ > +#define WLED5_SINK_REG_MOD_A_EN 0x50 > +#define WLED5_SINK_REG_MOD_B_EN 0x60 > +#define WLED5_SINK_REG_MOD_EN_MASK BIT(7) > + > +#define WLED5_SINK_REG_MOD_A_SRC_SEL 0x51 > +#define WLED5_SINK_REG_MOD_B_SRC_SEL 0x61 > +#define WLED5_SINK_REG_MOD_SRC_SEL_HIGH 0 > +#define WLED5_SINK_REG_MOD_SRC_SEL_EXT 0x03 > +#define WLED5_SINK_REG_MOD_SRC_SEL_MASK GENMASK(1, 0) > + > +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL 0x52 > +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL 0x62 > +#define WLED5_SINK_REG_BRIGHTNESS_WIDTH_12B 0 > +#define WLED5_SINK_REG_BRIGHTNESS_WIDTH_15B 1 > + > +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB 0x53 > +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_MSB 0x54 > +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB 0x63 > +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_MSB 0x64 > + > +#define WLED5_SINK_REG_MOD_SYNC_BIT 0x65 > +#define WLED5_SINK_REG_SYNC_MOD_A_BIT BIT(0) > +#define WLED5_SINK_REG_SYNC_MOD_B_BIT BIT(1) > +#define WLED5_SINK_REG_SYNC_MASK GENMASK(1, 0) > + > +/* WLED5 specific per-'string' registers below */ > +#define WLED5_SINK_REG_STR_FULL_SCALE_CURR(n) (0x72 + (n * 0x10)) > + > +#define WLED5_SINK_REG_STR_SRC_SEL(n) (0x73 + (n * 0x10)) > +#define WLED5_SINK_REG_SRC_SEL_MOD_A 0 > +#define WLED5_SINK_REG_SRC_SEL_MOD_B 1 > +#define WLED5_SINK_REG_SRC_SEL_MASK GENMASK(1, 0) > + > struct wled_var_cfg { > const u32 *values; > u32 (*fn)(u32); > @@ -125,6 +162,8 @@ struct wled_config { > u32 num_strings; > u32 string_i_limit; > u32 enabled_strings[WLED_MAX_STRINGS]; > + u32 mod_sel; > + u32 cabc_sel; Please explain cabc_sel (wled5) versus cabc_en (wled4). > bool cs_out_en; > bool ext_gen; > bool cabc; > @@ -164,6 +203,27 @@ struct wled { > int (*wled_ovp_delay)(struct wled *wled); > }; > > +enum wled5_mod_sel { > + MOD_A, > + MOD_B, > + MOD_MAX, > +}; > + > +static const u8 wled5_brightness_reg[MOD_MAX] = { > + [MOD_A] = WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB, > + [MOD_B] = WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB, > +}; > + > +static const u8 wled5_src_sel_reg[MOD_MAX] = { > + [MOD_A] = WLED5_SINK_REG_MOD_A_SRC_SEL, > + [MOD_B] = WLED5_SINK_REG_MOD_B_SRC_SEL, > +}; > + > +static const u8 wled5_brt_wid_sel_reg[MOD_MAX] = { > + [MOD_A] = WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL, > + [MOD_B] = WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL, > +}; > + > static int wled3_set_brightness(struct wled *wled, u16 brightness) > { > int rc, i; > @@ -182,6 +242,25 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness) > return 0; > } > > +static int wled5_set_brightness(struct wled *wled, u16 brightness) > +{ > + int rc, offset; > + u16 low_limit = wled->max_brightness * 1 / 1000; > + u8 v[2]; > + > + /* WLED5's lower limit is 0.1% */ > + if (brightness < low_limit) > + brightness = low_limit; > + > + v[0] = brightness & 0xff; > + v[1] = (brightness >> 8) & 0x7f; > + > + offset = wled5_brightness_reg[wled->cfg.mod_sel]; > + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + offset, > + v, 2); > + return rc; > +} > + Can we keep the same ordering throughout the file (wled3, wled4, wled5)? Most of the wled5 callbacks seem to have been inserted above wled4. Daniel.
On 2020-03-10 21:15, Daniel Thompson wrote: > On Mon, Mar 09, 2020 at 06:56:01PM +0530, Kiran Gunda wrote: >> Add support for WLED5 peripheral that is present on PM8150L PMICs. >> >> PM8150L WLED supports the following: >> - Two modulators and each sink can use any of the modulator >> - Multiple CABC selection options >> - Multiple brightness width selection (12 bits to 15 bits) >> >> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> > > Mostly just style comments below... > > >> --- >> .../bindings/leds/backlight/qcom-wled.yaml | 39 +++ >> drivers/video/backlight/qcom-wled.c | 336 >> ++++++++++++++++++++- > > Shouldn't the bindings and driver be separate? > > Ok. I will split it out in to a separate patch in next post. >> 2 files changed, 374 insertions(+), 1 deletion(-) >> >> diff --git >> a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml >> b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml >> index d334f81..e0dadc4 100644 >> --- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml >> +++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml >> @@ -20,6 +20,7 @@ properties: >> - qcom,pm8941-wled >> - qcom,pmi8998-wled >> - qcom,pm660l-wled >> + - qcom,pm8150l-wled >> >> reg: >> maxItems: 1 >> @@ -28,10 +29,23 @@ properties: >> maxItems: 1 >> description: >> brightness value on boot, value from 0-4095. >> + For pm8150l this value vary from 0-4095 or 0-32767 >> + depending on the brightness control mode. If CABC is >> + enabled 0-4095 range is used. > > Is this a pm8150l restriction or a WLED5 restriction (will other WLED5 > have different ranges)? > It is a WLED5 restriction which is used in pm8150l PMIC. > >> allOf: >> - $ref: /schemas/types.yaml#/definitions/uint32 >> default: 2048 >> >> + max-brightness: >> + maxItems: 1 >> + description: >> + Maximum brightness level. Allowed values are, >> + for pmi8998 it is 0-4095. >> + For pm8150l, this can be either 4095 or 32767. > > Ditto. > It is a WLED5 restriction which is used in pm8150l PMIC. > >> + If CABC is enabled, this is capped to 4095. >> + allOf: >> + - $ref: /schemas/types.yaml#/definitions/uint32 >> + >> label: >> maxItems: 1 >> description: >> @@ -124,6 +138,31 @@ properties: >> value for PM8941 from 1 to 3. Default 2 >> For PMI8998 from 1 to 4. >> >> + qcom,modulator-sel: >> + maxItems: 1 >> + allOf: >> + - $ref: /schemas/types.yaml#/definitions/uint32 >> + description: >> + Selects the modulator used for brightness modulation. >> + Allowed values are, >> + 0 - Modulator A >> + 1 - Modulator B >> + If not specified, then modulator A will be used by default. >> + This property is applicable only to WLED5 peripheral. >> + >> + qcom,cabc-sel: >> + maxItems: 1 >> + allOf: >> + - $ref: /schemas/types.yaml#/definitions/uint32 >> + description: >> + Selects the CABC pin signal used for brightness modulation. >> + Allowed values are, >> + 0 - CABC disabled >> + 1 - CABC 1 >> + 2 - CABC 2 >> + 3 - External signal (e.g. LPG) is used for dimming >> + This property is applicable only to WLED5 peripheral. >> + >> interrupts: >> maxItems: 2 >> description: >> diff --git a/drivers/video/backlight/qcom-wled.c >> b/drivers/video/backlight/qcom-wled.c >> index b73f273..edbbcb2 100644 >> --- a/drivers/video/backlight/qcom-wled.c >> +++ b/drivers/video/backlight/qcom-wled.c >> @@ -19,6 +19,8 @@ >> #define WLED_DEFAULT_BRIGHTNESS 2048 >> #define WLED_SOFT_START_DLY_US 10000 >> #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF >> +#define WLED5_SINK_REG_BRIGHT_MAX_12B 0xFFF >> +#define WLED5_SINK_REG_BRIGHT_MAX_15B 0x7FFF >> >> /* WLED3/WLED4 control registers */ >> #define WLED3_CTRL_REG_FAULT_STATUS 0x08 >> @@ -40,6 +42,7 @@ >> >> #define WLED3_CTRL_REG_OVP 0x4d >> #define WLED3_CTRL_REG_OVP_MASK GENMASK(1, 0) >> +#define WLED5_CTRL_REG_OVP_MASK GENMASK(3, 0) >> >> #define WLED3_CTRL_REG_ILIMIT 0x4e >> #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) >> @@ -101,6 +104,40 @@ >> >> #define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) >> >> +/* WLED5 specific sink registers */ >> +#define WLED5_SINK_REG_MOD_A_EN 0x50 >> +#define WLED5_SINK_REG_MOD_B_EN 0x60 >> +#define WLED5_SINK_REG_MOD_EN_MASK BIT(7) >> + >> +#define WLED5_SINK_REG_MOD_A_SRC_SEL 0x51 >> +#define WLED5_SINK_REG_MOD_B_SRC_SEL 0x61 >> +#define WLED5_SINK_REG_MOD_SRC_SEL_HIGH 0 >> +#define WLED5_SINK_REG_MOD_SRC_SEL_EXT 0x03 >> +#define WLED5_SINK_REG_MOD_SRC_SEL_MASK GENMASK(1, 0) >> + >> +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL 0x52 >> +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL 0x62 >> +#define WLED5_SINK_REG_BRIGHTNESS_WIDTH_12B 0 >> +#define WLED5_SINK_REG_BRIGHTNESS_WIDTH_15B 1 >> + >> +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB 0x53 >> +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_MSB 0x54 >> +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB 0x63 >> +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_MSB 0x64 >> + >> +#define WLED5_SINK_REG_MOD_SYNC_BIT 0x65 >> +#define WLED5_SINK_REG_SYNC_MOD_A_BIT BIT(0) >> +#define WLED5_SINK_REG_SYNC_MOD_B_BIT BIT(1) >> +#define WLED5_SINK_REG_SYNC_MASK GENMASK(1, 0) >> + >> +/* WLED5 specific per-'string' registers below */ >> +#define WLED5_SINK_REG_STR_FULL_SCALE_CURR(n) (0x72 + (n * 0x10)) >> + >> +#define WLED5_SINK_REG_STR_SRC_SEL(n) (0x73 + (n * 0x10)) >> +#define WLED5_SINK_REG_SRC_SEL_MOD_A 0 >> +#define WLED5_SINK_REG_SRC_SEL_MOD_B 1 >> +#define WLED5_SINK_REG_SRC_SEL_MASK GENMASK(1, 0) >> + >> struct wled_var_cfg { >> const u32 *values; >> u32 (*fn)(u32); >> @@ -125,6 +162,8 @@ struct wled_config { >> u32 num_strings; >> u32 string_i_limit; >> u32 enabled_strings[WLED_MAX_STRINGS]; > >> + u32 mod_sel; >> + u32 cabc_sel; > > Please explain cabc_sel (wled5) versus cabc_en (wled4). > Ok. WLED5 has 2 CABC modules, from which one can be selected/enabled. wled4 has only one CABC module and it is just enabled based on the user input. I will add a comment in next post. >> bool cs_out_en; >> bool ext_gen; >> bool cabc; >> @@ -164,6 +203,27 @@ struct wled { >> int (*wled_ovp_delay)(struct wled *wled); >> }; >> >> +enum wled5_mod_sel { >> + MOD_A, >> + MOD_B, >> + MOD_MAX, >> +}; >> + >> +static const u8 wled5_brightness_reg[MOD_MAX] = { >> + [MOD_A] = WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB, >> + [MOD_B] = WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB, >> +}; >> + >> +static const u8 wled5_src_sel_reg[MOD_MAX] = { >> + [MOD_A] = WLED5_SINK_REG_MOD_A_SRC_SEL, >> + [MOD_B] = WLED5_SINK_REG_MOD_B_SRC_SEL, >> +}; >> + >> +static const u8 wled5_brt_wid_sel_reg[MOD_MAX] = { >> + [MOD_A] = WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL, >> + [MOD_B] = WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL, >> +}; >> + >> static int wled3_set_brightness(struct wled *wled, u16 brightness) >> { >> int rc, i; >> @@ -182,6 +242,25 @@ static int wled3_set_brightness(struct wled >> *wled, u16 brightness) >> return 0; >> } >> >> +static int wled5_set_brightness(struct wled *wled, u16 brightness) >> +{ >> + int rc, offset; >> + u16 low_limit = wled->max_brightness * 1 / 1000; >> + u8 v[2]; >> + >> + /* WLED5's lower limit is 0.1% */ >> + if (brightness < low_limit) >> + brightness = low_limit; >> + >> + v[0] = brightness & 0xff; >> + v[1] = (brightness >> 8) & 0x7f; >> + >> + offset = wled5_brightness_reg[wled->cfg.mod_sel]; >> + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + offset, >> + v, 2); >> + return rc; >> +} >> + > > Can we keep the same ordering throughout the file (wled3, wled4, > wled5)? > Most of the wled5 callbacks seem to have been inserted above wled4. > Sure. Will do it in next post. > > Daniel.
diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml index d334f81..e0dadc4 100644 --- a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml +++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml @@ -20,6 +20,7 @@ properties: - qcom,pm8941-wled - qcom,pmi8998-wled - qcom,pm660l-wled + - qcom,pm8150l-wled reg: maxItems: 1 @@ -28,10 +29,23 @@ properties: maxItems: 1 description: brightness value on boot, value from 0-4095. + For pm8150l this value vary from 0-4095 or 0-32767 + depending on the brightness control mode. If CABC is + enabled 0-4095 range is used. allOf: - $ref: /schemas/types.yaml#/definitions/uint32 default: 2048 + max-brightness: + maxItems: 1 + description: + Maximum brightness level. Allowed values are, + for pmi8998 it is 0-4095. + For pm8150l, this can be either 4095 or 32767. + If CABC is enabled, this is capped to 4095. + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + label: maxItems: 1 description: @@ -124,6 +138,31 @@ properties: value for PM8941 from 1 to 3. Default 2 For PMI8998 from 1 to 4. + qcom,modulator-sel: + maxItems: 1 + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + description: + Selects the modulator used for brightness modulation. + Allowed values are, + 0 - Modulator A + 1 - Modulator B + If not specified, then modulator A will be used by default. + This property is applicable only to WLED5 peripheral. + + qcom,cabc-sel: + maxItems: 1 + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + description: + Selects the CABC pin signal used for brightness modulation. + Allowed values are, + 0 - CABC disabled + 1 - CABC 1 + 2 - CABC 2 + 3 - External signal (e.g. LPG) is used for dimming + This property is applicable only to WLED5 peripheral. + interrupts: maxItems: 2 description: diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index b73f273..edbbcb2 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -19,6 +19,8 @@ #define WLED_DEFAULT_BRIGHTNESS 2048 #define WLED_SOFT_START_DLY_US 10000 #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF +#define WLED5_SINK_REG_BRIGHT_MAX_12B 0xFFF +#define WLED5_SINK_REG_BRIGHT_MAX_15B 0x7FFF /* WLED3/WLED4 control registers */ #define WLED3_CTRL_REG_FAULT_STATUS 0x08 @@ -40,6 +42,7 @@ #define WLED3_CTRL_REG_OVP 0x4d #define WLED3_CTRL_REG_OVP_MASK GENMASK(1, 0) +#define WLED5_CTRL_REG_OVP_MASK GENMASK(3, 0) #define WLED3_CTRL_REG_ILIMIT 0x4e #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) @@ -101,6 +104,40 @@ #define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) +/* WLED5 specific sink registers */ +#define WLED5_SINK_REG_MOD_A_EN 0x50 +#define WLED5_SINK_REG_MOD_B_EN 0x60 +#define WLED5_SINK_REG_MOD_EN_MASK BIT(7) + +#define WLED5_SINK_REG_MOD_A_SRC_SEL 0x51 +#define WLED5_SINK_REG_MOD_B_SRC_SEL 0x61 +#define WLED5_SINK_REG_MOD_SRC_SEL_HIGH 0 +#define WLED5_SINK_REG_MOD_SRC_SEL_EXT 0x03 +#define WLED5_SINK_REG_MOD_SRC_SEL_MASK GENMASK(1, 0) + +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL 0x52 +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL 0x62 +#define WLED5_SINK_REG_BRIGHTNESS_WIDTH_12B 0 +#define WLED5_SINK_REG_BRIGHTNESS_WIDTH_15B 1 + +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB 0x53 +#define WLED5_SINK_REG_MOD_A_BRIGHTNESS_MSB 0x54 +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB 0x63 +#define WLED5_SINK_REG_MOD_B_BRIGHTNESS_MSB 0x64 + +#define WLED5_SINK_REG_MOD_SYNC_BIT 0x65 +#define WLED5_SINK_REG_SYNC_MOD_A_BIT BIT(0) +#define WLED5_SINK_REG_SYNC_MOD_B_BIT BIT(1) +#define WLED5_SINK_REG_SYNC_MASK GENMASK(1, 0) + +/* WLED5 specific per-'string' registers below */ +#define WLED5_SINK_REG_STR_FULL_SCALE_CURR(n) (0x72 + (n * 0x10)) + +#define WLED5_SINK_REG_STR_SRC_SEL(n) (0x73 + (n * 0x10)) +#define WLED5_SINK_REG_SRC_SEL_MOD_A 0 +#define WLED5_SINK_REG_SRC_SEL_MOD_B 1 +#define WLED5_SINK_REG_SRC_SEL_MASK GENMASK(1, 0) + struct wled_var_cfg { const u32 *values; u32 (*fn)(u32); @@ -125,6 +162,8 @@ struct wled_config { u32 num_strings; u32 string_i_limit; u32 enabled_strings[WLED_MAX_STRINGS]; + u32 mod_sel; + u32 cabc_sel; bool cs_out_en; bool ext_gen; bool cabc; @@ -164,6 +203,27 @@ struct wled { int (*wled_ovp_delay)(struct wled *wled); }; +enum wled5_mod_sel { + MOD_A, + MOD_B, + MOD_MAX, +}; + +static const u8 wled5_brightness_reg[MOD_MAX] = { + [MOD_A] = WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB, + [MOD_B] = WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB, +}; + +static const u8 wled5_src_sel_reg[MOD_MAX] = { + [MOD_A] = WLED5_SINK_REG_MOD_A_SRC_SEL, + [MOD_B] = WLED5_SINK_REG_MOD_B_SRC_SEL, +}; + +static const u8 wled5_brt_wid_sel_reg[MOD_MAX] = { + [MOD_A] = WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL, + [MOD_B] = WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL, +}; + static int wled3_set_brightness(struct wled *wled, u16 brightness) { int rc, i; @@ -182,6 +242,25 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness) return 0; } +static int wled5_set_brightness(struct wled *wled, u16 brightness) +{ + int rc, offset; + u16 low_limit = wled->max_brightness * 1 / 1000; + u8 v[2]; + + /* WLED5's lower limit is 0.1% */ + if (brightness < low_limit) + brightness = low_limit; + + v[0] = brightness & 0xff; + v[1] = (brightness >> 8) & 0x7f; + + offset = wled5_brightness_reg[wled->cfg.mod_sel]; + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + offset, + v, 2); + return rc; +} + static int wled4_set_brightness(struct wled *wled, u16 brightness) { int rc, i; @@ -244,6 +323,24 @@ static int wled_module_enable(struct wled *wled, int val) return 0; } +static int wled5_sync_toggle(struct wled *wled) +{ + int rc; + u8 val; + + val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT : + WLED5_SINK_REG_SYNC_MOD_B_BIT; + rc = regmap_update_bits(wled->regmap, + wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT, + WLED5_SINK_REG_SYNC_MASK, val); + if (rc < 0) + return rc; + + return regmap_update_bits(wled->regmap, + wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT, + WLED5_SINK_REG_SYNC_MASK, 0); +} + static int wled3_sync_toggle(struct wled *wled) { int rc; @@ -345,6 +442,29 @@ static int wled_update_status(struct backlight_device *bl) return rc; } +static int wled5_cabc_config(struct wled *wled, bool enable) +{ + int rc, offset; + u8 reg; + + if (wled->cabc_disabled) + return 0; + + reg = enable ? wled->cfg.cabc_sel : 0; + offset = wled5_src_sel_reg[wled->cfg.mod_sel]; + rc = regmap_update_bits(wled->regmap, wled->sink_addr + offset, + WLED5_SINK_REG_MOD_SRC_SEL_MASK, reg); + if (rc < 0) { + pr_err("Error in configuring CABC rc=%d\n", rc); + return rc; + } + + if (!wled->cfg.cabc_sel) + wled->cabc_disabled = true; + + return 0; +} + static int wled4_cabc_config(struct wled *wled, bool enable) { int i, j, rc; @@ -909,6 +1029,115 @@ static const struct wled_config wled4_config_defaults = { .auto_detection_enabled = false, }; +static int wled5_setup(struct wled *wled) +{ + int rc, temp, i, j; + u8 sink_en = 0; + u16 addr; + u32 val; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_OVP, + WLED5_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; + + /* 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_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 + WLED5_SINK_REG_STR_SRC_SEL(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED5_SINK_REG_SRC_SEL_MASK, + wled->cfg.mod_sel == MOD_A ? + WLED5_SINK_REG_SRC_SEL_MOD_A : + WLED5_SINK_REG_SRC_SEL_MOD_B); + + temp = j + WLED4_SINK_REG_CURR_SINK_SHFT; + sink_en |= 1 << temp; + } + + rc = wled5_cabc_config(wled, wled->cfg.cabc_sel ? true : false); + if (rc < 0) + return rc; + + /* Enable one of the modulators A or B based on mod_sel */ + addr = wled->sink_addr + WLED5_SINK_REG_MOD_A_EN; + val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_MOD_EN_MASK : 0; + rc = regmap_update_bits(wled->regmap, addr, + WLED5_SINK_REG_MOD_EN_MASK, val); + if (rc < 0) + return rc; + + addr = wled->sink_addr + WLED5_SINK_REG_MOD_B_EN; + val = (wled->cfg.mod_sel == MOD_B) ? WLED5_SINK_REG_MOD_EN_MASK : 0; + rc = regmap_update_bits(wled->regmap, addr, + WLED5_SINK_REG_MOD_EN_MASK, val); + if (rc < 0) + return rc; + + addr = wled->sink_addr + wled5_brt_wid_sel_reg[wled->cfg.mod_sel]; + val = (wled->max_brightness == WLED5_SINK_REG_BRIGHT_MAX_15B) ? + WLED5_SINK_REG_BRIGHTNESS_WIDTH_15B : + WLED5_SINK_REG_BRIGHTNESS_WIDTH_12B; + rc = regmap_write(wled->regmap, addr, val); + 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; + + /* This updates only FSC configuration in WLED5 */ + rc = wled->wled_sync_toggle(wled); + if (rc < 0) { + pr_err("Failed to toggle sync reg rc:%d\n", rc); + return rc; + } + + rc = wled_auto_detection_at_init(wled); + if (rc < 0) + return rc; + + return 0; +} + +static const struct wled_config wled5_config_defaults = { + .boost_i_limit = 5, + .string_i_limit = 10, + .ovp = 4, + .num_strings = 4, + .switch_freq = 11, + .mod_sel = 0, + .cabc_sel = 0, + .cabc = false, + .external_pfet = false, + .auto_detection_enabled = false, +}; + static const u32 wled3_boost_i_limit_values[] = { 105, 385, 525, 805, 980, 1260, 1400, 1680, }; @@ -927,6 +1156,16 @@ static const struct wled_var_cfg wled4_boost_i_limit_cfg = { .size = ARRAY_SIZE(wled4_boost_i_limit_values), }; +static inline u32 wled5_boost_i_limit_values_fn(u32 idx) +{ + return 525 + (idx * 175); +} + +static const struct wled_var_cfg wled5_boost_i_limit_cfg = { + .fn = wled5_boost_i_limit_values_fn, + .size = 8, +}; + static const u32 wled3_ovp_values[] = { 35, 32, 29, 27, }; @@ -945,6 +1184,21 @@ static const struct wled_var_cfg wled4_ovp_cfg = { .size = ARRAY_SIZE(wled4_ovp_values), }; +static inline u32 wled5_ovp_values_fn(u32 idx) +{ + /* + * 0000 - 38.5 V + * 0001 - 37 V .. + * 1111 - 16 V + */ + return 38500 - (idx * 1500); +} + +static const struct wled_var_cfg wled5_ovp_cfg = { + .fn = wled5_ovp_values_fn, + .size = 16, +}; + static u32 wled3_num_strings_values_fn(u32 idx) { return idx + 1; @@ -992,6 +1246,14 @@ static const struct wled_var_cfg wled4_string_cfg = { .size = 16, }; +static const struct wled_var_cfg wled5_mod_sel_cfg = { + .size = 2, +}; + +static const struct wled_var_cfg wled5_cabc_sel_cfg = { + .size = 4, +}; + static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx) { if (idx >= cfg->size) @@ -1068,6 +1330,44 @@ static int wled_configure(struct wled *wled) }, }; + const struct wled_u32_opts wled5_opts[] = { + { + .name = "qcom,current-boost-limit", + .val_ptr = &cfg->boost_i_limit, + .cfg = &wled5_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 = &wled5_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, + }, + { + .name = "qcom,modulator-sel", + .val_ptr = &cfg->mod_sel, + .cfg = &wled5_mod_sel_cfg, + }, + { + .name = "qcom,cabc-sel", + .val_ptr = &cfg->cabc_sel, + .cfg = &wled5_cabc_sel_cfg, + }, + }; + const struct wled_bool_opts bool_opts[] = { { "qcom,cs-out", &cfg->cs_out_en, }, { "qcom,ext-gen", &cfg->ext_gen, }, @@ -1117,6 +1417,23 @@ static int wled_configure(struct wled *wled) wled->sink_addr = be32_to_cpu(*prop_addr); break; + case 5: + u32_opts = wled5_opts; + size = ARRAY_SIZE(wled5_opts); + *cfg = wled5_config_defaults; + wled->wled_set_brightness = wled5_set_brightness; + wled->wled_sync_toggle = wled5_sync_toggle; + wled->cabc_config = wled5_cabc_config; + 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: dev_err(wled->dev, "Invalid WLED version\n"); return -EINVAL; @@ -1270,6 +1587,10 @@ static int wled_probe(struct platform_device *pdev) if (rc) return rc; + val = WLED3_SINK_REG_BRIGHT_MAX; + of_property_read_u32(pdev->dev.of_node, "max-brightness", &val); + wled->max_brightness = val; + switch (wled->version) { case 3: wled->cfg.auto_detection_enabled = false; @@ -1289,6 +1610,18 @@ static int wled_probe(struct platform_device *pdev) } break; + case 5: + wled->has_short_detect = true; + if (wled->cfg.cabc_sel) + wled->max_brightness = WLED5_SINK_REG_BRIGHT_MAX_12B; + + rc = wled5_setup(wled); + if (rc) { + dev_err(&pdev->dev, "wled5_setup failed\n"); + return rc; + } + break; + default: dev_err(wled->dev, "Invalid WLED version\n"); break; @@ -1310,7 +1643,7 @@ static int wled_probe(struct platform_device *pdev) memset(&props, 0, sizeof(struct backlight_properties)); props.type = BACKLIGHT_RAW; props.brightness = val; - props.max_brightness = WLED3_SINK_REG_BRIGHT_MAX; + props.max_brightness = wled->max_brightness; bl = devm_backlight_device_register(&pdev->dev, wled->name, &pdev->dev, wled, &wled_ops, &props); @@ -1333,6 +1666,7 @@ 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 }, + { .compatible = "qcom,pm8150l-wled", .data = (void *)5 }, {} }; MODULE_DEVICE_TABLE(of, wled_match_table);
Add support for WLED5 peripheral that is present on PM8150L PMICs. PM8150L WLED supports the following: - Two modulators and each sink can use any of the modulator - Multiple CABC selection options - Multiple brightness width selection (12 bits to 15 bits) Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> --- .../bindings/leds/backlight/qcom-wled.yaml | 39 +++ drivers/video/backlight/qcom-wled.c | 336 ++++++++++++++++++++- 2 files changed, 374 insertions(+), 1 deletion(-)