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pinctrl: qcom: lpass-lpi: set output value before enabling output 

commit 163bfb0cb1 upstream.

As per Hardware Programming Guide, when configuring pin as output,
set the pin value before setting output-enable (OE).  Similar approach
is in main SoC TLMM pin controller.

Cc: <stable@vger.kernel.org>
Fixes: 6e261d1090 ("pinctrl: qcom: Add sm8250 lpass lpi pinctrl driver")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230309154949.658380-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Kozlowski 2023-03-09 16:49:46 +01:00 committed by Greg Kroah-Hartman
parent 956bbf1871
commit cb99866895
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
View File

@ -216,6 +216,15 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
}
}
/*
* As per Hardware Programming Guide, when configuring pin as output,
* set the pin value before setting output-enable (OE).
*/
if (output_enabled) {
val = u32_encode_bits(value ? 1 : 0, LPI_GPIO_VALUE_OUT_MASK);
lpi_gpio_write(pctrl, group, LPI_GPIO_VALUE_REG, val);
}
val = lpi_gpio_read(pctrl, group, LPI_GPIO_CFG_REG);
u32p_replace_bits(&val, pullup, LPI_GPIO_PULL_MASK);
@ -225,11 +234,6 @@ static int lpi_config_set(struct pinctrl_dev *pctldev, unsigned int group,
lpi_gpio_write(pctrl, group, LPI_GPIO_CFG_REG, val);
if (output_enabled) {
val = u32_encode_bits(value ? 1 : 0, LPI_GPIO_VALUE_OUT_MASK);
lpi_gpio_write(pctrl, group, LPI_GPIO_VALUE_REG, val);
}
return 0;
}