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pinctrl: qcom: spmi-gpio: add support to enable/disable output

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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.

Change-Id: Ie857f94d529a6209bcb82ef3775d414f19d5678a
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2017-12-15 17:44:50 -08:00 • committed by David Collins
commit 3f96cb1a83
1 changed files with 7 additions and 1 deletions
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8
drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
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@ -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, 2016-2017 The Linux Foundation. All rights reserved.
*/
#include <linux/gpio/driver.h>
@ -423,6 +423,9 @@ 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;
@ -502,6 +505,9 @@ 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;