From bd2e9714c851770652253fab858cb50ecd95d329 Mon Sep 17 00:00:00 2001
From: Vignesh R <vigneshr@ti.com>
Date: Wed, 7 Dec 2016 16:55:06 +0530
Subject: [PATCH] regulator: fixed: Add support to handle enable-active-high DT
property
Add support to handle enable-active-high DT property. This property is
used to drive the gpio controlling fixed regulator as active high when
claiming gpio line.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Acked-by: Simon Glass <sjg@chromium.org>
---
doc/device-tree-bindings/regulator/fixed.txt | 4 ++++
drivers/power/regulator/fixed.c | 7 ++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/doc/device-tree-bindings/regulator/fixed.txt b/doc/device-tree-bindings/regulator/fixed.txt
index 8a0d002688..5fd9033fea 100644
--- a/doc/device-tree-bindings/regulator/fixed.txt
+++ b/doc/device-tree-bindings/regulator/fixed.txt
@@ -12,6 +12,9 @@ Optional properties:
- gpio: GPIO to use for enable control
- startup-delay-us: startup time in microseconds
- regulator constraints (binding info: regulator.txt)
+- enable-active-high: Polarity of GPIO is Active high. If this property
+ is missing, the default assumed is Active low.
+
Other kernel-style properties, are currently not used.
@@ -36,4 +39,5 @@ fixed_regulator@0 {
regulator-max-microamp = <15000>;
regulator-always-on;
regulator-boot-on;
+ enable-active-high;
};
diff --git a/drivers/power/regulator/fixed.c b/drivers/power/regulator/fixed.c
index 62dc47f769..3d2d9081c1 100644
--- a/drivers/power/regulator/fixed.c
+++ b/drivers/power/regulator/fixed.c
@@ -27,6 +27,8 @@ static int fixed_regulator_ofdata_to_platdata(struct udevice *dev)
struct dm_regulator_uclass_platdata *uc_pdata;
struct fixed_regulator_platdata *dev_pdata;
struct gpio_desc *gpio;
+ const void *blob = gd->fdt_blob;
+ int node = dev->of_offset, flags = GPIOD_IS_OUT;
int ret;
dev_pdata = dev_get_platdata(dev);
@@ -37,9 +39,12 @@ static int fixed_regulator_ofdata_to_platdata(struct udevice *dev)
/* Set type to fixed */
uc_pdata->type = REGULATOR_TYPE_FIXED;
+ if (fdtdec_get_bool(blob, node, "enable-active-high"))
+ flags |= GPIOD_IS_OUT_ACTIVE;
+
/* Get fixed regulator optional enable GPIO desc */
gpio = &dev_pdata->gpio;
- ret = gpio_request_by_name(dev, "gpio", 0, gpio, GPIOD_IS_OUT);
+ ret = gpio_request_by_name(dev, "gpio", 0, gpio, flags);
if (ret) {
debug("Fixed regulator optional enable GPIO - not found! Error: %d\n",
ret);
--
2.39.5