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pinctrl: sprd: Add pin high impedance mode support

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For Spreadtrum pin controller, it will be the high impedance
mode if disable input and output mode for a pin. Thus add
PIN_CONFIG_BIAS_HIGH_IMPEDANCE configuration to support it.

Signed-off-by: Linhua Xu <linhua.xu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang7@gmail.com>
Link: https://lore.kernel.org/r/3bdac4c2673b54c940e511f3fa569ee33b87b8d5.1585124562.git.baolin.wang7@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linhua Xu 2020-03-25 16:25:28 +08:00 committed by Linus Walleij
parent bb0f472f96
commit 1592c4b993
1 changed files with 12 additions and 0 deletions
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12
drivers/pinctrl/sprd/pinctrl-sprd.c
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@ -467,6 +467,12 @@ static int sprd_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin_id,
case PIN_CONFIG_OUTPUT_ENABLE: case PIN_CONFIG_OUTPUT_ENABLE:
arg = reg & SLEEP_OUTPUT_MASK; arg = reg & SLEEP_OUTPUT_MASK;
break; break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
if ((reg & SLEEP_OUTPUT) || (reg & SLEEP_INPUT))
return -EINVAL;
arg = 1;
break;
case PIN_CONFIG_DRIVE_STRENGTH: case PIN_CONFIG_DRIVE_STRENGTH:
arg = (reg >> DRIVE_STRENGTH_SHIFT) & arg = (reg >> DRIVE_STRENGTH_SHIFT) &
DRIVE_STRENGTH_MASK; DRIVE_STRENGTH_MASK;
@ -646,6 +652,12 @@ static int sprd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin_id,
shift = SLEEP_OUTPUT_SHIFT; shift = SLEEP_OUTPUT_SHIFT;
} }
break; break;
case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
if (is_sleep_config == true) {
val = shift = 0;
mask = SLEEP_OUTPUT | SLEEP_INPUT;
}
break;
case PIN_CONFIG_DRIVE_STRENGTH: case PIN_CONFIG_DRIVE_STRENGTH:
if (arg < 2 || arg > 60) if (arg < 2 || arg > 60)
return -EINVAL; return -EINVAL;