pinctrl: abx500: allow to set pull up
On ABx500 chip family, all pins support only pull down except for AB8540 which supports pull up/down on some pins. Rework abx500_pin_config_set to be able to set pull up on pins which support this feature. Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -725,7 +725,7 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
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struct pullud *pullud = pct->soc->pullud;
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struct gpio_chip *chip = &pct->chip;
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unsigned offset;
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int ret;
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int ret = 0;
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enum pin_config_param param = pinconf_to_config_param(config);
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enum pin_config_param argument = pinconf_to_config_argument(config);
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@ -763,6 +763,28 @@ static int abx500_pin_config_set(struct pinctrl_dev *pctldev,
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offset, argument ? 0 : 1);
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break;
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case PIN_CONFIG_BIAS_PULL_UP:
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/*
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* if argument = 1 set the pull up
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* else clear the pull up
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*/
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ret = abx500_gpio_direction_input(chip, offset);
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/*
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* Some chips only support pull down, while some actually
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* support both pull up and pull down. Such chips have
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* a "pullud" range specified for the pins that support
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* both features. If the pin is not within that range, do
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* nothing
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*/
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if (pullud &&
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pin >= pullud->first_pin &&
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pin <= pullud->last_pin) {
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ret = abx500_config_pull_updown(pct,
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pin,
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argument ? ABX500_GPIO_PULL_UP : ABX500_GPIO_PULL_NONE);
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}
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break;
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case PIN_CONFIG_OUTPUT:
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ret = abx500_gpio_direction_output(chip, offset, argument);
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