[PATCH 2/2] pinctrl: qcom: spmi-gpio: add support to enable/disable output
From: Subbaraman Narayanamurthy <hidden>
Date: 2021-09-14 02:58:11
Also in:
linux-arm-msm, linux-devicetree, lkml
Subsystem:
arm/qualcomm mailing list, pin control subsystem, pin controller - qualcomm, the rest · Maintainers:
Linus Walleij, Bjorn Andersson, Linus Torvalds
Currently, if the GPIO is configured as output in the bootloader and user changes the mode to input in HLOS, it would end up getting configured as input/output. Functionally, this is fine; however, there may be some requirements where the output needs to be disabled so that it can be used only for input. Add support to enable/disable output mode through "output-enable" or "output-disable" pinctrl properties. Signed-off-by: Subbaraman Narayanamurthy <redacted> --- drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
index 98bf0e2..39a18aa 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c@@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved. + * Copyright (c) 2012-2014, 2021, The Linux Foundation. All rights reserved. */ #include <linux/gpio/driver.h>
@@ -424,6 +424,9 @@ static int pmic_gpio_config_get(struct pinctrl_dev *pctldev, return -EINVAL; arg = 1; break; + case PIN_CONFIG_OUTPUT_ENABLE: + arg = pad->output_enabled; + break; case PIN_CONFIG_OUTPUT: arg = pad->out_value; break;
@@ -503,6 +506,9 @@ static int pmic_gpio_config_set(struct pinctrl_dev *pctldev, unsigned int pin, case PIN_CONFIG_INPUT_ENABLE: pad->input_enabled = arg ? true : false; break; + case PIN_CONFIG_OUTPUT_ENABLE: + pad->output_enabled = arg ? true : false; + break; case PIN_CONFIG_OUTPUT: pad->output_enabled = true; pad->out_value = arg;
--
2.7.4