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dm: video: Update pwm_backlight to support livetree

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Update this driver to support a live device tree.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Anatolij Gustschin <agust@denx.de>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
master
Simon Glass 8 years ago
parent fb0b709eff
commit 7cf208d73b
1 changed files with 12 additions and 10 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 22
      drivers/video/pwm_backlight.c

22
drivers/video/pwm_backlight.c
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@ -28,11 +28,13 @@ struct pwm_backlight_priv {
static int pwm_backlight_enable(struct udevice *dev)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
struct dm_regulator_uclass_platdata *plat;
uint duty_cycle;
int ret;
debug("%s: Enable '%s', regulator '%s'\n", __func__, dev->name,
priv->reg->name);
plat = dev_get_uclass_platdata(priv->reg);
debug("%s: Enable '%s', regulator '%s'/'%s'\n", __func__, dev->name,
priv->reg->name, plat->name);
ret = regulator_set_enable(priv->reg, true);
if (ret) {
debug("%s: Cannot enable regulator for PWM '%s'\n", __func__,
@ -59,12 +61,11 @@ static int pwm_backlight_enable(struct udevice *dev)
static int pwm_backlight_ofdata_to_platdata(struct udevice *dev)
{
struct pwm_backlight_priv *priv = dev_get_priv(dev);
struct fdtdec_phandle_args args;
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
struct ofnode_phandle_args args;
int index, ret, count, len;
const u32 *cell;
debug("%s: start\n", __func__);
ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
"power-supply", &priv->reg);
if (ret) {
@ -79,14 +80,14 @@ static int pwm_backlight_ofdata_to_platdata(struct udevice *dev)
if (ret != -ENOENT)
return ret;
}
ret = fdtdec_parse_phandle_with_args(blob, node, "pwms", "#pwm-cells",
0, 0, &args);
ret = dev_read_phandle_with_args(dev, "pwms", "#pwm-cells", 0, 0,
&args);
if (ret) {
debug("%s: Cannot get PWM phandle: ret=%d\n", __func__, ret);
return ret;
}
ret = uclass_get_device_by_of_offset(UCLASS_PWM, args.node, &priv->pwm);
ret = uclass_get_device_by_ofnode(UCLASS_PWM, args.node, &priv->pwm);
if (ret) {
debug("%s: Cannot get PWM: ret=%d\n", __func__, ret);
return ret;
@ -94,8 +95,8 @@ static int pwm_backlight_ofdata_to_platdata(struct udevice *dev)
priv->channel = args.args[0];
priv->period_ns = args.args[1];
index = fdtdec_get_int(blob, node, "default-brightness-level", 255);
cell = fdt_getprop(blob, node, "brightness-levels", &len);
index = dev_read_u32_default(dev, "default-brightness-level", 255);
cell = dev_read_prop(dev, "brightness-levels", &len);
count = len / sizeof(u32);
if (cell && count > index) {
priv->default_level = fdt32_to_cpu(cell[index]);
@ -104,6 +105,7 @@ static int pwm_backlight_ofdata_to_platdata(struct udevice *dev)
priv->default_level = index;
priv->max_level = 255;
}
debug("%s: done\n", __func__);
return 0;

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