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pwm: qpnp: correct LUT mode LPG disable steps

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Modify the pwm-qpnp driver in order to remove RAMP_CONTROL
register writes during LPG disable while in LUT mode.

This is needed to fix the LED blink functionality
when LPG enable/disable operations are performed continously

CRs-Fixed: 593837
Change-Id: I915eb7620902911ef8d3f8d44c9b75986bc69bd1
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
This commit is contained in:
Prasad Sodagudi 2014-06-15 13:26:17 +05:30
parent 810f69165f
commit 46883f3b59
1 changed files with 3 additions and 4 deletions
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7
drivers/pwm/pwm-qpnp.c
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@ -132,7 +132,6 @@ do { \
#define QPNP_ENABLE_LUT_V0(value) (value |= QPNP_RAMP_START_MASK)
#define QPNP_DISABLE_LUT_V0(value) (value &= ~QPNP_RAMP_START_MASK)
#define QPNP_ENABLE_LUT_V1(value, id) (value |= BIT(id))
#define QPNP_DISABLE_LUT_V1(value, id) (value &= ~BIT(id))
/* LPG Control for RAMP_STEP_DURATION_LSB */
#define QPNP_RAMP_STEP_DURATION_LSB_MASK 0xFF
@ -1006,8 +1005,6 @@ static int qpnp_lpg_configure_lut_state(struct qpnp_pwm_chip *chip,
lpg_config->lut_config.ramp_index);
value2 = QPNP_ENABLE_LPG_MODE;
} else {
QPNP_DISABLE_LUT_V1(value1,
lpg_config->lut_config.ramp_index);
value2 = QPNP_DISABLE_LPG_MODE;
}
mask1 = value1;
@ -1027,8 +1024,10 @@ static int qpnp_lpg_configure_lut_state(struct qpnp_pwm_chip *chip,
if (rc)
return rc;
return qpnp_lpg_save_and_write(value1, mask1, reg1,
if (state == QPNP_LUT_ENABLE || chip->revision == QPNP_LPG_REVISION_0)
rc = qpnp_lpg_save_and_write(value1, mask1, reg1,
addr1, 1, chip);
return rc;
}
static inline int qpnp_enable_pwm_mode(struct qpnp_pwm_chip *chip)