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Commit f1a2576c authored by Mohan Pallaka's avatar Mohan Pallaka
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platform: msm: support haptic brake disable 



Hardware enables auto braking. Add an interface to
disable the braking.

Change-Id: I1b52593bc208d7347b8c6c4ac69d6430730c1cdb
Signed-off-by: default avatarMohan Pallaka <mpallaka@codeaurora.org>
parent 5921180c

Documentation/devicetree/bindings/platform/msm/qpnp-haptic.txt

+3 −1
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ Optional Properties: 
 - qcom,vmax-mv : maximum output voltage in milli volts

 - qcom,ilim-ma : maximum output current limit threshold in milli amps

 - qcom,int-pwm-freq-khz : frequency for internal pwm

 - qcom,en-brake : specify to enable internal reverse braking

 - qcom,brake-pattern : 4 byte active brake pattern. Each pattern represents

		2-bit amplitude control 0x00: 0, 0x01: vmax/4, 0x02: vmax/2,

		0x03: vmax. Default values are 0x00.
@@ -62,7 +63,8 @@ Example: 
			qcom,ilim-ma = <800>;

			qcom,sc-deb-cycles = <8>;

			qcom,int-pwm-freq-khz = <505>;

			qcom,brake-pattern = [00 00 03 03];

			qcom,en-brake;

			qcom,brake-pattern = [03 03 00 00];

			qcom,use-play-irq;

			qcom,use-sc-irq;

			qcom,wave-samples = [3e 3e 3e 3e 3e 3e 3e 3e];

drivers/platform/msm/qpnp-haptic.c

+44 −18
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ 


#define QPNP_HAP_STATUS(b)		(b + 0x0A)

#define QPNP_HAP_EN_CTL_REG(b)		(b + 0x46)

#define QPNP_HAP_EN_CTL2_REG(b)		(b + 0x48)

#define QPNP_HAP_ACT_TYPE_REG(b)	(b + 0x4C)

#define QPNP_HAP_WAV_SHAPE_REG(b)	(b + 0x4D)

#define QPNP_HAP_PLAY_MODE_REG(b)	(b + 0x4E)
@@ -109,6 +110,7 @@ 
#define QPNP_HAP_BRAKE_PAT_LEN		4

#define QPNP_HAP_PLAY_EN		0x80

#define QPNP_HAP_EN			0x80

#define QPNP_HAP_BRAKE_MASK		0xFE



#define QPNP_HAP_TIMEOUT_MS_MAX		15000

#define QPNP_HAP_STR_SIZE		20
@@ -117,9 +119,9 @@ 


/* haptic debug register set */

static u8 qpnp_hap_dbg_regs[] = {

	0x0a, 0x0b, 0x0c, 0x46, 0x4c, 0x4d, 0x4e, 0x4f, 0x51, 0x52, 0x53,

	0x54, 0x55, 0x56, 0x57, 0x58, 0x5c, 0x5e, 0x60, 0x61, 0x62, 0x63,

	0x64, 0x65, 0x66, 0x67, 0x70

	0x0a, 0x0b, 0x0c, 0x46, 0x48, 0x4c, 0x4d, 0x4e, 0x4f, 0x51, 0x52, 0x53,

	0x54, 0x55, 0x56, 0x57, 0x58, 0x5c, 0x5e, 0x60, 0x61, 0x62, 0x63, 0x64,

	0x65, 0x66, 0x67, 0x70

};



/*
@@ -198,6 +200,8 @@ struct qpnp_pwm_info { 
 *  @ wf_update - waveform update flag

 *  @ pwm_cfg_state - pwm mode configuration state

 *  @ buffer_cfg_state - buffer mode configuration state

 *  @ en_brake - brake state

 *  @ sup_brake_pat - support custom brake pattern

 */

struct qpnp_hap {

	struct spmi_device *spmi;
@@ -236,6 +240,8 @@ struct qpnp_hap { 
	bool wf_update;

	bool pwm_cfg_state;

	bool buffer_cfg_state;

	bool en_brake;

	bool sup_brake_pat;

};



/* helper to read a pmic register */
@@ -1307,14 +1313,26 @@ static int qpnp_hap_config(struct qpnp_hap *hap) 
		return rc;



	/* Configure BRAKE register */

	rc = qpnp_hap_read_reg(hap, &reg, QPNP_HAP_EN_CTL2_REG(hap->base));

	if (rc < 0)

		return rc;

	reg &= QPNP_HAP_BRAKE_MASK;

	reg |= hap->en_brake;

	rc = qpnp_hap_write_reg(hap, &reg, QPNP_HAP_EN_CTL2_REG(hap->base));

	if (rc)

		return rc;



	if (hap->en_brake && hap->sup_brake_pat) {

		for (i = QPNP_HAP_BRAKE_PAT_LEN - 1, reg = 0; i >= 0; i--) {

			hap->brake_pat[i] &= QPNP_HAP_BRAKE_PAT_MASK;

			temp = i << 1;

			reg |= hap->brake_pat[i] << temp;

		}

	rc = qpnp_hap_write_reg(hap, &reg, QPNP_HAP_BRAKE_REG(hap->base));

		rc = qpnp_hap_write_reg(hap, &reg,

					QPNP_HAP_BRAKE_REG(hap->base));

		if (rc)

			return rc;

	}



	/* Cache enable control register */

	rc = qpnp_hap_read_reg(hap, &reg, QPNP_HAP_EN_CTL_REG(hap->base));
@@ -1534,15 +1552,23 @@ static int qpnp_hap_parse_dt(struct qpnp_hap *hap) 
	if (rc < 0)

		return rc;



	hap->en_brake = of_property_read_bool(spmi->dev.of_node,

				"qcom,en-brake");



	if (hap->en_brake) {

		prop = of_find_property(spmi->dev.of_node,

				"qcom,brake-pattern", &temp);

		if (!prop) {

		dev_err(&spmi->dev, "brake pattern not found");

			dev_info(&spmi->dev, "brake pattern not found");

		} else if (temp != QPNP_HAP_BRAKE_PAT_LEN) {

		dev_err(&spmi->dev, "Invalid length of brake pattern\n");

			dev_err(&spmi->dev, "Invalid len of brake pattern\n");

			return -EINVAL;

	} else

		memcpy(hap->brake_pat, prop->value, QPNP_HAP_BRAKE_PAT_LEN);

		} else {

			hap->sup_brake_pat = true;

			memcpy(hap->brake_pat, prop->value,

					QPNP_HAP_BRAKE_PAT_LEN);

		}

	}



	hap->use_sc_irq = of_property_read_bool(spmi->dev.of_node,

				"qcom,use-sc-irq");