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| author |   Linhua Xu <linhua.xu@unisoc.com> | 2020-03-25 16:25:28 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2020-03-27 22:08:46 +0100 |
| commit | 1592c4b9935fa8a3b7c297955bb872a357e5a3b6 (patch) | |
| tree | 224b21691f34c0421a08e376645e4e7747772642 /drivers/pinctrl | |
| parent | pinctrl: sprd: Use the correct pin output configuration (diff) | |
| download | wireguard-linux-1592c4b9935fa8a3b7c297955bb872a357e5a3b6.tar.xz wireguard-linux-1592c4b9935fa8a3b7c297955bb872a357e5a3b6.zip | |
pinctrl: sprd: Add pin high impedance mode support
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>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/sprd/pinctrl-sprd.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pinctrl/sprd/pinctrl-sprd.c b/drivers/pinctrl/sprd/pinctrl-sprd.c index 8e396104ad1a..48cbf2a2837f 100644 --- a/drivers/pinctrl/sprd/pinctrl-sprd.c +++ b/drivers/pinctrl/sprd/pinctrl-sprd.c @@ -467,6 +467,12 @@ static int sprd_pinconf_get(struct pinctrl_dev *pctldev, unsigned int pin_id, case PIN_CONFIG_OUTPUT_ENABLE: arg = reg & SLEEP_OUTPUT_MASK; break; + case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: + if ((reg & SLEEP_OUTPUT) || (reg & SLEEP_INPUT)) + return -EINVAL; + + arg = 1; + break; case PIN_CONFIG_DRIVE_STRENGTH: arg = (reg >> DRIVE_STRENGTH_SHIFT) & DRIVE_STRENGTH_MASK; @@ -646,6 +652,12 @@ static int sprd_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin_id, shift = SLEEP_OUTPUT_SHIFT; } 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: if (arg < 2 || arg > 60) return -EINVAL; |