regulator: gpio: properly check return value of of_get_named_gpio

The function of_get_named_gpio() could return -ENOENT, -EPROBE_DEFER
-EINVAL and so on. Currently, for the optional property "enable-gpio",
we only check -EPROBE_DEFER, this is not enough since there may be
misconfigured "enable-gpio" in the DTB, of_get_named_gpio() will return
-EINVAL in this case, we should return immediately here. And for the
optional property "gpios", we didn't check the return value, the driver
will continue to the point where gpio_request_array() is called, it
doesn't make sense to continue if we got -EPROBE_DEFER or -EINVAL here.

This patch tries to address these two issues by properly checking the
return value of of_get_named_gpio.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

path: root/include/dt-bindings/thermal/thermal_exynos.h

/*
 * thermal_exynos.h - Samsung EXYNOS TMU device tree definitions
 *
 *  Copyright (C) 2014 Samsung Electronics
 *  Lukasz Majewski <l.majewski@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#ifndef _EXYNOS_THERMAL_TMU_DT_H
#define _EXYNOS_THERMAL_TMU_DT_H

#define TYPE_ONE_POINT_TRIMMING 0
#define TYPE_ONE_POINT_TRIMMING_25 1
#define TYPE_ONE_POINT_TRIMMING_85 2
#define TYPE_TWO_POINT_TRIMMING 3
#define TYPE_NONE 4

#endif /* _EXYNOS_THERMAL_TMU_DT_H */