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Subject[PATCH V1 1/2] pinctrl: qcom: spmi-gpio: Read REG_EN_CTL to get initial enable state
Date
From: Fenglin Wu <fenglinw@codeaurora.org>

Get initial value of is_enabled flag by reading REG_EN_CTL register
so that it can reflect the correct hardware enable state before
setting pin config.

Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>
---
drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
index a0edaa8..0a1e173 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
@@ -106,6 +106,7 @@

/* PMIC_GPIO_REG_EN_CTL */
#define PMIC_GPIO_REG_MASTER_EN_SHIFT 7
+#define PMIC_GPIO_REG_MASTER_EN 0x80

#define PMIC_GPIO_PHYSICAL_OFFSET 1

@@ -914,8 +915,12 @@ static int pmic_gpio_populate(struct pmic_gpio_state *state,
pad->atest = (val & PMIC_GPIO_LV_MV_ANA_MUX_SEL_MASK) + 1;
}

- /* Pin could be disabled with PIN_CONFIG_BIAS_HIGH_IMPEDANCE */
- pad->is_enabled = true;
+ val = pmic_gpio_read(state, pad, PMIC_GPIO_REG_EN_CTL);
+ if (val < 0)
+ return val;
+
+ pad->is_enabled = val & PMIC_GPIO_REG_MASTER_EN;
+
return 0;
}

--
Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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