diff options
| author | Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> | 2023-03-09 16:49:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 23:00:17 +0900 |
| commit | 333f49fcf0e786e89caa75e96a124d75d1aee7c0 (patch) | |
| tree | 449962eb4117aec640d564750ea7c4f896682da8 /drivers/pinctrl | |
| parent | 3028ac7dc0c039c60e025a9f074665b9a45eac56 (diff) | |
pinctrl: qcom: lpass-lpi: set output value before enabling output
commit 163bfb0cb1f6fbf961cf912cbde57399ea1ae0e8 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: 6e261d1090d6 ("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>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c index 2f19ab4db720..dd1c9fd733c8 100644 --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c @@ -452,6 +452,15 @@ 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); @@ -461,11 +470,6 @@ 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; } |