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Date: Fri, 13 Oct 2017 14:15:03 +0800 From: fenglinw@...eaurora.org To: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org, Bjorn Andersson <bjorn.andersson@...aro.org>, Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org Cc: collinsd@...eaurora.org, aghayal@...eaurora.org, wruan@...eaurora.org, subbaram@...eaurora.org, kgunda@...eaurora.org, Fenglin Wu <fenglinw@...eaurora.org> Subject: [PATCH V1 1/2] pinctrl: qcom: spmi-gpio: Read REG_EN_CTL to get initial enable state From: Fenglin Wu <fenglinw@...eaurora.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@...eaurora.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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