Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 5c312a4f authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
Browse files

leds: qpnp-flash-v2: Add support for thermal derate features 



Add support to configure thermal debounce, hysteresis and
ramp down rates from device tree.

CRs-Fixed: 1060212
Change-Id: Iabe79bae5f9471c3c6128ed21efd04de00739daa
Signed-off-by: default avatarDevesh Jhunjhunwala <deveshj@codeaurora.org>
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 98ac2b9c

Documentation/devicetree/bindings/leds/leds-qpnp-flash-v2.txt

+21 −0
Original line number Diff line number Diff line
@@ -78,6 +78,27 @@ Optional properties: 
- qcom,thermal-derate-current	: Array of currrent limits for thermal mitigation. Required if

				  qcom,thermal-derate-en is specified. Unit is mA. Format is

				  qcom,thermal-derate-current = <OTST1_LIMIT, OTST2_LIMIT, OTST3_LIMIT>.

- qcom,otst-ramp-back-up-dis	: Boolean property to disable current ramp

				  backup after thermal derate trigger is

				  deasserted.

- qcom,thermal-derate-slow	: Integer property to specify slow ramping

				  down thermal rate. Unit is in uS. Allowed

				  values are: 128, 256, 512, 1024, 2048, 4096,

				  8192 and 314592.

- qcom,thermal-derate-fast	: Integer property to specify fast ramping

				  down thermal rate. Unit is in uS. Allowed

				  values are: 32, 64, 96, 128, 256, 384 and

				  512.

- qcom,thermal-debounce		: Integer property to specify thermal debounce

				  time. It is only used if qcom,thermal-derate-en

				  is specified. Unit is in uS. Allowed values

				  are: 0, 16, 32, 64.

- qcom,thermal-hysteresis	: Integer property to specify thermal derating

				  hysteresis. Unit is in deciDegC. It is only

				  used if qcom,thermal-derate-en is specified.

				  Allowed values are:

				  0, 15, 30, 45 for pmicobalt.

				  0, 20, 40, 60 for pm2falcon.

- qcom,hw-strobe-option	: Integer type to specify hardware strobe option. Based on the specified

			  value, additional GPIO configuration may be required to provide strobing

			  support. Supported values are:

drivers/leds/leds-qpnp-flash-v2.c

+195 −25
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ 
#include <linux/leds-qpnp-flash.h>

#include <linux/leds-qpnp-flash-v2.h>

#include <linux/qpnp/qpnp-revid.h>

#include <linux/log2.h>

#include "leds.h"



#define	FLASH_LED_REG_LED_STATUS1(base)		(base + 0x08)
@@ -44,9 +45,12 @@ 
#define	FLASH_LED_REG_HDRM_AUTO_MODE_CTRL(base)	(base + 0x50)

#define	FLASH_LED_REG_WARMUP_DELAY(base)	(base + 0x51)

#define	FLASH_LED_REG_ISC_DELAY(base)		(base + 0x52)

#define	FLASH_LED_REG_THERMAL_RMP_DN_RATE(base)	(base + 0x55)

#define	FLASH_LED_REG_THERMAL_THRSH1(base)	(base + 0x56)

#define	FLASH_LED_REG_THERMAL_THRSH2(base)	(base + 0x57)

#define	FLASH_LED_REG_THERMAL_THRSH3(base)	(base + 0x58)

#define	FLASH_LED_REG_THERMAL_HYSTERESIS(base)	(base + 0x59)

#define	FLASH_LED_REG_THERMAL_DEBOUNCE(base)	(base + 0x5A)

#define	FLASH_LED_REG_VPH_DROOP_THRESHOLD(base)	(base + 0x61)

#define	FLASH_LED_REG_VPH_DROOP_DEBOUNCE(base)	(base + 0x62)

#define	FLASH_LED_REG_ILED_GRT_THRSH(base)	(base + 0x67)
@@ -59,13 +63,10 @@ 
#define	FLASH_LED_REG_LMH_LEVEL(base)		(base + 0x70)

#define	FLASH_LED_REG_CURRENT_DERATE_EN(base)	(base + 0x76)



#define	FLASH_LED_HDRM_MODE_PRGM_MASK		GENMASK(7, 0)

#define	FLASH_LED_HDRM_VOL_MASK			GENMASK(7, 4)

#define	FLASH_LED_CURRENT_MASK			GENMASK(6, 0)

#define	FLASH_LED_ENABLE_MASK			GENMASK(2, 0)

#define	FLASH_HW_STROBE_MASK			GENMASK(2, 0)

#define	FLASH_LED_SAFETY_TMR_MASK		GENMASK(7, 0)

#define	FLASH_LED_INT_RT_STS_MASK		GENMASK(7, 0)

#define	FLASH_LED_ISC_WARMUP_DELAY_MASK		GENMASK(1, 0)

#define	FLASH_LED_CURRENT_DERATE_EN_MASK	GENMASK(2, 0)

#define	FLASH_LED_VPH_DROOP_DEBOUNCE_MASK	GENMASK(1, 0)
@@ -75,13 +76,19 @@ 
#define	FLASH_LED_LMH_LEVEL_MASK		GENMASK(1, 0)

#define	FLASH_LED_VPH_DROOP_HYSTERESIS_MASK	GENMASK(5, 4)

#define	FLASH_LED_VPH_DROOP_THRESHOLD_MASK	GENMASK(2, 0)

#define	FLASH_LED_THERMAL_HYSTERESIS_MASK	GENMASK(1, 0)

#define	FLASH_LED_THERMAL_DEBOUNCE_MASK		GENMASK(1, 0)

#define	FLASH_LED_THERMAL_THRSH_MASK		GENMASK(2, 0)

#define	FLASH_LED_THERMAL_OTST_MASK		GENMASK(2, 0)

#define	FLASH_LED_MOD_CTRL_MASK			BIT(7)

#define	FLASH_LED_HW_SW_STROBE_SEL_BIT		BIT(2)

#define	FLASH_LED_VPH_DROOP_FAULT_MASK		BIT(4)

#define	FLASH_LED_LMH_MITIGATION_EN_MASK	BIT(0)

#define	FLASH_LED_CHGR_MITIGATION_EN_MASK	BIT(4)

#define	THERMAL_OTST1_RAMP_CTRL_MASK		BIT(7)

#define	THERMAL_OTST1_RAMP_CTRL_SHIFT		7

#define	THERMAL_DERATE_SLOW_SHIFT		4

#define	THERMAL_DERATE_SLOW_MASK		GENMASK(6, 4)

#define	THERMAL_DERATE_FAST_MASK		GENMASK(2, 0)



#define	VPH_DROOP_DEBOUNCE_US_TO_VAL(val_us)	(val_us / 8)

#define	VPH_DROOP_HYST_MV_TO_VAL(val_mv)	(val_mv / 25)
@@ -90,16 +97,22 @@ 
#define	MITIGATION_THRSH_MA_TO_VAL(val_ma)	(val_ma / 100)

#define	CURRENT_MA_TO_REG_VAL(curr_ma, ires_ua)	((curr_ma * 1000) / ires_ua - 1)

#define	SAFETY_TMR_TO_REG_VAL(duration_ms)	((duration_ms / 10) - 1)

#define	THERMAL_HYST_TEMP_TO_VAL(val, divisor)	(val / divisor)



#define	FLASH_LED_ISC_WARMUP_DELAY_SHIFT	6

#define	FLASH_LED_WARMUP_DELAY_DEFAULT		2

#define	FLASH_LED_ISC_DELAY_DEFAULT		3

#define	FLASH_LED_VPH_DROOP_DEBOUNCE_DEFAULT	2

#define	FLASH_LED_VPH_DROOP_HYST_SHIFT		4

#define	FLASH_LED_VPH_DROOP_HYST_DEFAULT	2

#define	FLASH_LED_VPH_DROOP_THRESH_DEFAULT	5

#define	FLASH_LED_VPH_DROOP_DEBOUNCE_MAX	3

#define	FLASH_LED_VPH_DROOP_HYST_MAX		3

#define	FLASH_LED_DEBOUNCE_MAX			3

#define	FLASH_LED_HYSTERESIS_MAX		3

#define	FLASH_LED_VPH_DROOP_THRESH_MAX		7

#define	THERMAL_DERATE_SLOW_MAX			314592

#define	THERMAL_DERATE_FAST_MAX			512

#define	THERMAL_DEBOUNCE_TIME_MAX		64

#define	THERMAL_DERATE_HYSTERESIS_MAX		3

#define	FLASH_LED_THERMAL_THRSH_MIN		3

#define	FLASH_LED_THERMAL_OTST_LEVELS		3

#define	FLASH_LED_VLED_MAX_DEFAULT_UV		3500000
@@ -202,6 +215,10 @@ struct flash_led_platform_data { 
	int			rpara_uohm;

	int			lmh_rbatt_threshold_uohm;

	int			lmh_ocv_threshold_uv;

	int			thermal_derate_slow;

	int			thermal_derate_fast;

	int			thermal_hysteresis;

	int			thermal_debounce;

	u32			led1n2_iclamp_low_ma;

	u32			led1n2_iclamp_mid_ma;

	u32			led3_iclamp_low_ma;
@@ -219,6 +236,7 @@ struct flash_led_platform_data { 
	u8			hw_strobe_option;

	bool			hdrm_auto_mode_en;

	bool			thermal_derate_en;

	bool			otst_ramp_bkup_en;

};



/*
@@ -241,24 +259,46 @@ struct qpnp_flash_led { 
	bool				trigger_chgr;

};



static int

qpnp_flash_led_read(struct qpnp_flash_led *led, u16 addr, u8 *data)

static int thermal_derate_slow_table[] = {

	128, 256, 512, 1024, 2048, 4096, 8192, 314592,

};



static int thermal_derate_fast_table[] = {

	32, 64, 96, 128, 256, 384, 512,

};



static int qpnp_flash_led_read(struct qpnp_flash_led *led, u16 addr, u8 *data)

{

	int rc;

	uint val;



	rc = regmap_read(led->regmap, addr, &val);

	if (rc < 0)

	if (rc < 0) {

		dev_err(&led->pdev->dev, "Unable to read from 0x%04X rc = %d\n",

			addr, rc);

	else

		dev_dbg(&led->pdev->dev, "Read 0x%02X from addr 0x%04X\n",

			val, addr);

		return rc;

	}



	dev_dbg(&led->pdev->dev, "Read 0x%02X from addr 0x%04X\n", val, addr);

	*data = (u8)val;

	return 0;

}



static int qpnp_flash_led_write(struct qpnp_flash_led *led, u16 addr, u8 data)

{

	int rc;



	rc = regmap_write(led->regmap, addr, data);

	if (rc < 0) {

		dev_err(&led->pdev->dev, "Unable to write to 0x%04X rc = %d\n",

			addr, rc);

		return rc;

	}



	dev_dbg(&led->pdev->dev, "Wrote 0x%02X to addr 0x%04X\n", data, addr);

	return 0;

}



static int

qpnp_flash_led_masked_read(struct qpnp_flash_led *led, u16 addr, u8 mask,

								u8 *val)
@@ -299,13 +339,12 @@ led_brightness qpnp_flash_led_brightness_get(struct led_classdev *led_cdev) 
static int qpnp_flash_led_init_settings(struct qpnp_flash_led *led)

{

	int rc, i, addr_offset;

	u8 val = 0;

	u8 val = 0, mask;



	for (i = 0; i < led->num_fnodes; i++) {

		addr_offset = led->fnode[i].id;

		rc = qpnp_flash_led_masked_write(led,

		rc = qpnp_flash_led_write(led,

			FLASH_LED_REG_HDRM_PRGM(led->base + addr_offset),

			FLASH_LED_HDRM_MODE_PRGM_MASK,

			led->fnode[i].hdrm_val);

		if (rc < 0)

			return rc;
@@ -313,9 +352,9 @@ static int qpnp_flash_led_init_settings(struct qpnp_flash_led *led) 
		val |= 0x1 << led->fnode[i].id;

	}



	rc = qpnp_flash_led_masked_write(led,

	rc = qpnp_flash_led_write(led,

				FLASH_LED_REG_HDRM_AUTO_MODE_CTRL(led->base),

				FLASH_LED_HDRM_MODE_PRGM_MASK, val);

				val);

	if (rc < 0)

		return rc;
@@ -340,6 +379,43 @@ static int qpnp_flash_led_init_settings(struct qpnp_flash_led *led) 
	if (rc < 0)

		return rc;



	val = (led->pdata->otst_ramp_bkup_en << THERMAL_OTST1_RAMP_CTRL_SHIFT);

	mask = THERMAL_OTST1_RAMP_CTRL_MASK;

	if (led->pdata->thermal_derate_slow >= 0) {

		val |= (led->pdata->thermal_derate_slow <<

				THERMAL_DERATE_SLOW_SHIFT);

		mask |= THERMAL_DERATE_SLOW_MASK;

	}



	if (led->pdata->thermal_derate_fast >= 0) {

		val |= led->pdata->thermal_derate_fast;

		mask |= THERMAL_DERATE_FAST_MASK;

	}



	rc = qpnp_flash_led_masked_write(led,

			FLASH_LED_REG_THERMAL_RMP_DN_RATE(led->base),

			mask, val);

	if (rc < 0)

		return rc;



	if (led->pdata->thermal_debounce >= 0) {

		rc = qpnp_flash_led_masked_write(led,

				FLASH_LED_REG_THERMAL_DEBOUNCE(led->base),

				FLASH_LED_THERMAL_DEBOUNCE_MASK,

				led->pdata->thermal_debounce);

		if (rc < 0)

			return rc;

	}



	if (led->pdata->thermal_hysteresis >= 0) {

		rc = qpnp_flash_led_masked_write(led,

				FLASH_LED_REG_THERMAL_HYSTERESIS(led->base),

				FLASH_LED_THERMAL_HYSTERESIS_MASK,

				led->pdata->thermal_hysteresis);

		if (rc < 0)

			return rc;

	}



	rc = qpnp_flash_led_masked_write(led,

			FLASH_LED_REG_VPH_DROOP_DEBOUNCE(led->base),

			FLASH_LED_VPH_DROOP_DEBOUNCE_MASK,
@@ -923,9 +999,9 @@ static int qpnp_flash_led_switch_set(struct flash_switch_data *snode, bool on) 
		if (rc < 0)

			return rc;



		rc = qpnp_flash_led_masked_write(led,

		rc = qpnp_flash_led_write(led,

			FLASH_LED_REG_SAFETY_TMR(led->base + addr_offset),

			FLASH_LED_SAFETY_TMR_MASK, led->fnode[i].duration);

			led->fnode[i].duration);

		if (rc < 0)

			return rc;
@@ -1499,6 +1575,23 @@ static int qpnp_flash_led_parse_and_register_switch(struct qpnp_flash_led *led, 
	return 0;

}



static int get_code_from_table(int *table, int len, int value)

{

	int i;



	for (i = 0; i < len; i++) {

		if (value == table[i])

			break;

	}



	if (i == len) {

		pr_err("Couldn't find %d from table\n", value);

		return -ENODATA;

	}



	return i;

}



static int qpnp_flash_led_parse_common_dt(struct qpnp_flash_led *led,

						struct device_node *node)

{
@@ -1583,6 +1676,81 @@ static int qpnp_flash_led_parse_common_dt(struct qpnp_flash_led *led, 
		}

	}



	led->pdata->otst_ramp_bkup_en =

		!of_property_read_bool(node, "qcom,otst-ramp-back-up-dis");



	led->pdata->thermal_derate_slow = -EINVAL;

	rc = of_property_read_u32(node, "qcom,thermal-derate-slow", &val);

	if (!rc) {

		if (val < 0 || val > THERMAL_DERATE_SLOW_MAX) {

			pr_err("Invalid thermal_derate_slow %d\n", val);

			return -EINVAL;

		}



		led->pdata->thermal_derate_slow =

			get_code_from_table(thermal_derate_slow_table,

				ARRAY_SIZE(thermal_derate_slow_table), val);

	} else if (rc != -EINVAL) {

		dev_err(&led->pdev->dev, "Unable to read thermal derate slow, rc=%d\n",

				rc);

		return rc;

	}



	led->pdata->thermal_derate_fast = -EINVAL;

	rc = of_property_read_u32(node, "qcom,thermal-derate-fast", &val);

	if (!rc) {

		if (val < 0 || val > THERMAL_DERATE_FAST_MAX) {

			pr_err("Invalid thermal_derate_fast %d\n", val);

			return -EINVAL;

		}



		led->pdata->thermal_derate_fast =

			get_code_from_table(thermal_derate_fast_table,

				ARRAY_SIZE(thermal_derate_fast_table), val);

	} else if (rc != -EINVAL) {

		dev_err(&led->pdev->dev, "Unable to read thermal derate fast, rc=%d\n",

				rc);

		return rc;

	}



	led->pdata->thermal_debounce = -EINVAL;

	rc = of_property_read_u32(node, "qcom,thermal-debounce", &val);

	if (!rc) {

		if (val < 0 || val > THERMAL_DEBOUNCE_TIME_MAX) {

			pr_err("Invalid thermal_debounce %d\n", val);

			return -EINVAL;

		}



		if (val >= 0 && val < 16)

			led->pdata->thermal_debounce = 0;

		else

			led->pdata->thermal_debounce = ilog2(val) - 3;

	} else if (rc != -EINVAL) {

		dev_err(&led->pdev->dev, "Unable to read thermal debounce, rc=%d\n",

				rc);

		return rc;

	}



	led->pdata->thermal_hysteresis = -EINVAL;

	rc = of_property_read_u32(node, "qcom,thermal-hysteresis", &val);

	if (!rc) {

		if (led->pdata->pmic_rev_id->pmic_subtype == PM2FALCON_SUBTYPE)

			val = THERMAL_HYST_TEMP_TO_VAL(val, 20);

		else

			val = THERMAL_HYST_TEMP_TO_VAL(val, 15);



		if (val < 0 || val > THERMAL_DERATE_HYSTERESIS_MAX) {

			pr_err("Invalid thermal_derate_hysteresis %d\n", val);

			return -EINVAL;

		}



		led->pdata->thermal_hysteresis = val;

	} else if (rc != -EINVAL) {

		dev_err(&led->pdev->dev, "Unable to read thermal hysteresis, rc=%d\n",

				rc);

		return rc;

	}



	led->pdata->vph_droop_debounce = FLASH_LED_VPH_DROOP_DEBOUNCE_DEFAULT;

	rc = of_property_read_u32(node, "qcom,vph-droop-debounce-us", &val);

	if (!rc) {
@@ -1594,9 +1762,9 @@ static int qpnp_flash_led_parse_common_dt(struct qpnp_flash_led *led, 
		return rc;

	}



	if (led->pdata->vph_droop_debounce > FLASH_LED_VPH_DROOP_DEBOUNCE_MAX) {

	if (led->pdata->vph_droop_debounce > FLASH_LED_DEBOUNCE_MAX) {

		dev_err(&led->pdev->dev,

				"Invalid VPH droop debounce specified");

				"Invalid VPH droop debounce specified\n");

		return -EINVAL;

	}
@@ -1613,7 +1781,7 @@ static int qpnp_flash_led_parse_common_dt(struct qpnp_flash_led *led, 


	if (led->pdata->vph_droop_threshold > FLASH_LED_VPH_DROOP_THRESH_MAX) {

		dev_err(&led->pdev->dev,

				"Invalid VPH droop threshold specified");

				"Invalid VPH droop threshold specified\n");

		return -EINVAL;

	}
@@ -1629,12 +1797,14 @@ static int qpnp_flash_led_parse_common_dt(struct qpnp_flash_led *led, 
		return rc;

	}



	if (led->pdata->vph_droop_hysteresis > FLASH_LED_VPH_DROOP_HYST_MAX) {

	if (led->pdata->vph_droop_hysteresis > FLASH_LED_HYSTERESIS_MAX) {

		dev_err(&led->pdev->dev,

				"Invalid VPH droop hysteresis specified");

				"Invalid VPH droop hysteresis specified\n");

		return -EINVAL;

	}



	led->pdata->vph_droop_hysteresis <<= FLASH_LED_VPH_DROOP_HYST_SHIFT;



	rc = of_property_read_u32(node, "qcom,hw-strobe-option", &val);

	if (!rc) {

		led->pdata->hw_strobe_option = (u8)val;