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leds: qpnp-wled: Add support to configure auto PFM for pmicobalt

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The WLED boost controller in pmicobalt supports auto PFM mode when
LCD mode is selected. Auto PFM mode is enabled by default except
on some specific hardware versions. Add a property to specify
AUTO_PFM_THRESHOLD for the boost controller so that it can enter
PFM mode when the adaptive headroom voltage falls below the
threshold.

CRs-Fixed: 1081738
Change-Id: I964b3452d0cdb3618b4ab446655ae75fa3a1049d
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
This commit is contained in:
Fenglin Wu 2016-11-09 13:37:08 +08:00
parent c8f85b42fe
commit 596b431a5f
2 changed files with 55 additions and 0 deletions
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3
Documentation/devicetree/bindings/leds/leds-qpnp-wled.txt
View file

@ -72,6 +72,9 @@ Optional properties for WLED:
- qcom,loop-auto-gm-en : A boolean property to specify if auto gm is enabled.
- qcom,loop-auto-gm-thresh : Specify auto gm threshold if "loop-auto-gm-en" is defined.
Supported values are: 0 - 3.
- qcom,lcd-auto-pfm-thresh : Specify the auto-pfm threshold, if the headroom voltage level
falls below this threshold and auto PFM is enabled, boost
controller will enter into PFM mode automatically.
Optional properties if 'qcom,disp-type-amoled' is mentioned in DT:
- qcom,loop-comp-res-kohm : control to select the compensation resistor in kohm. default is 320.

52
drivers/leds/leds-qpnp-wled.c
View file

@ -50,6 +50,7 @@
#define QPNP_WLED_VLOOP_COMP_RES_REG(b) (b + 0x55)
#define QPNP_WLED_VLOOP_COMP_GM_REG(b) (b + 0x56)
#define QPNP_WLED_PSM_CTRL_REG(b) (b + 0x5B)
#define QPNP_WLED_LCD_AUTO_PFM_REG(b) (b + 0x5C)
#define QPNP_WLED_SC_PRO_REG(b) (b + 0x5E)
#define QPNP_WLED_SWIRE_AVDD_REG(b) (b + 0x5F)
#define QPNP_WLED_CTRL_SPARE_REG(b) (b + 0xDF)
@ -87,6 +88,11 @@
#define QPNP_WLED_VREF_PSM_MAX_MV 750
#define QPNP_WLED_VREF_PSM_DFLT_AMOLED_MV 450
#define QPNP_WLED_PSM_CTRL_OVERWRITE 0x80
#define QPNP_WLED_LCD_AUTO_PFM_DFLT_THRESH 1
#define QPNP_WLED_LCD_AUTO_PFM_THRESH_MAX 0xF
#define QPNP_WLED_LCD_AUTO_PFM_EN_SHIFT 7
#define QPNP_WLED_LCD_AUTO_PFM_EN_BIT BIT(7)
#define QPNP_WLED_LCD_AUTO_PFM_THRESH_MASK GENMASK(3, 0)
#define QPNP_WLED_ILIM_MASK GENMASK(2, 0)
#define QPNP_WLED_ILIM_OVERWRITE BIT(7)
@ -327,7 +333,9 @@ static struct wled_vref_setting vref_setting_pmicobalt = {
* @ strings - supported list of strings
* @ num_strings - number of strings
* @ loop_auto_gm_thresh - the clamping level for auto gm
* @ lcd_auto_pfm_thresh - the threshold for lcd auto pfm mode
* @ loop_auto_gm_en - select if auto gm is enabled
* @ lcd_auto_pfm_en - select if auto pfm is enabled in lcd mode
* @ avdd_mode_spmi - enable avdd programming via spmi
* @ en_9b_dim_res - enable or disable 9bit dimming
* @ en_phase_stag - enable or disable phase staggering
@ -372,7 +380,9 @@ struct qpnp_wled {
u8 strings[QPNP_WLED_MAX_STRINGS];
u8 num_strings;
u8 loop_auto_gm_thresh;
u8 lcd_auto_pfm_thresh;
bool loop_auto_gm_en;
bool lcd_auto_pfm_en;
bool avdd_mode_spmi;
bool en_9b_dim_res;
bool en_phase_stag;
@ -1363,6 +1373,24 @@ static int qpnp_wled_config(struct qpnp_wled *wled)
return rc;
}
/* Configure auto PFM mode for LCD mode only */
if ((wled->pmic_rev_id->pmic_subtype == PMICOBALT_SUBTYPE ||
wled->pmic_rev_id->pmic_subtype == PM2FALCON_SUBTYPE)
&& !wled->disp_type_amoled) {
reg = 0;
reg |= wled->lcd_auto_pfm_thresh;
reg |= wled->lcd_auto_pfm_en <<
QPNP_WLED_LCD_AUTO_PFM_EN_SHIFT;
rc = qpnp_wled_masked_write_reg(wled,
QPNP_WLED_LCD_AUTO_PFM_EN_BIT |
QPNP_WLED_LCD_AUTO_PFM_THRESH_MASK, &reg,
QPNP_WLED_LCD_AUTO_PFM_REG(wled->ctrl_base));
if (rc < 0) {
pr_err("Write LCD_AUTO_PFM failed, rc=%d\n", rc);
return rc;
}
}
/* Configure the Soft start Ramp delay: for AMOLED - 0,for LCD - 2 */
reg = (wled->disp_type_amoled) ? 0 : 2;
rc = qpnp_wled_write_reg(wled, reg,
@ -1779,6 +1807,30 @@ static int qpnp_wled_parse_dt(struct qpnp_wled *wled)
}
}
if (wled->pmic_rev_id->pmic_subtype == PMICOBALT_SUBTYPE ||
wled->pmic_rev_id->pmic_subtype == PM2FALCON_SUBTYPE) {
if (wled->pmic_rev_id->rev4 == PMICOBALT_V2P0_REV4)
wled->lcd_auto_pfm_en = false;
else
wled->lcd_auto_pfm_en = true;
wled->lcd_auto_pfm_thresh = QPNP_WLED_LCD_AUTO_PFM_DFLT_THRESH;
rc = of_property_read_u8(pdev->dev.of_node,
"qcom,lcd-auto-pfm-thresh",
&wled->lcd_auto_pfm_thresh);
if (rc && rc != -EINVAL) {
dev_err(&pdev->dev,
"Unable to read lcd-auto-pfm-thresh\n");
return rc;
}
if (wled->lcd_auto_pfm_thresh >
QPNP_WLED_LCD_AUTO_PFM_THRESH_MAX)
wled->lcd_auto_pfm_thresh =
QPNP_WLED_LCD_AUTO_PFM_THRESH_MAX;
}
wled->sc_deb_cycles = QPNP_WLED_SC_DEB_CYCLES_DFLT;
rc = of_property_read_u32(pdev->dev.of_node,
"qcom,sc-deb-cycles", &temp_val);