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authorSimon Glass <sjg@chromium.org>2016-01-30 16:38:01 -0700
committerTom Warren <twarren@nvidia.com>2016-02-16 09:17:53 -0700
commit91c08afe66f8b24798389cf628210844b1dfa215 (patch)
treee7f47497a17896b2b5ae2de51c61c63005159bca /drivers/video/tegra.c
parent41fa035ce1480aa87d42e4af0ed8ea841944c2c9 (diff)
tegra: video: Move LCD driver to use the DM PWM driver
Use the driver-model PWM driver in preference to the old code. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'drivers/video/tegra.c')
-rw-r--r--drivers/video/tegra.c20
1 files changed, 16 insertions, 4 deletions
diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c
index ccd9c0824e..7fd10e6af3 100644
--- a/drivers/video/tegra.c
+++ b/drivers/video/tegra.c
@@ -6,6 +6,7 @@
#include <common.h>
#include <dm.h>
#include <fdtdec.h>
+#include <pwm.h>
#include <video.h>
#include <asm/system.h>
#include <asm/gpio.h>
@@ -68,6 +69,7 @@ struct tegra_lcd_priv {
unsigned pixel_clock; /* Pixel clock in Hz */
uint horiz_timing[FDT_LCD_TIMING_COUNT]; /* Horizontal timing */
uint vert_timing[FDT_LCD_TIMING_COUNT]; /* Vertical timing */
+ struct udevice *pwm;
int pwm_channel; /* PWM channel to use for backlight */
enum lcd_cache_t cache_type;
@@ -400,7 +402,8 @@ static int handle_stage(const void *blob, struct tegra_lcd_priv *priv)
pinmux_set_func(PMUX_PINGRP_GPU, PMUX_FUNC_PWM);
pinmux_tristate_disable(PMUX_PINGRP_GPU);
- pwm_enable(priv->pwm_channel, 32768, 0xdf, 1);
+ pwm_set_config(priv->pwm, priv->pwm_channel, 0xdf, 0xff);
+ pwm_set_enable(priv->pwm, priv->pwm_channel, true);
break;
case STAGE_BACKLIGHT_EN:
if (dm_gpio_is_valid(&priv->backlight_en))
@@ -504,12 +507,14 @@ static int tegra_lcd_probe(struct udevice *dev)
static int tegra_lcd_ofdata_to_platdata(struct udevice *dev)
{
struct tegra_lcd_priv *priv = dev_get_priv(dev);
+ struct fdtdec_phandle_args args;
const void *blob = gd->fdt_blob;
int node = dev->of_offset;
int front, back, ref;
int panel_node;
int rgb;
int bpp, bit;
+ int ret;
priv->disp = (struct disp_ctlr *)dev_get_addr(dev);
if (!priv->disp) {
@@ -575,12 +580,19 @@ static int tegra_lcd_ofdata_to_platdata(struct udevice *dev)
return -EINVAL;
}
- priv->pwm_channel = pwm_request(blob, panel_node, "nvidia,pwm");
- if (priv->pwm_channel < 0) {
- debug("%s: Unable to request PWM channel\n", __func__);
+ if (fdtdec_parse_phandle_with_args(blob, panel_node, "nvidia,pwm",
+ "#pwm-cells", 0, 0, &args)) {
+ debug("%s: Unable to decode PWM\n", __func__);
return -EINVAL;
}
+ ret = uclass_get_device_by_of_offset(UCLASS_PWM, args.node, &priv->pwm);
+ if (ret) {
+ debug("%s: Unable to find PWM\n", __func__);
+ return -EINVAL;
+ }
+ priv->pwm_channel = args.args[0];
+
priv->cache_type = fdtdec_get_int(blob, panel_node, "nvidia,cache-type",
FDT_LCD_CACHE_WRITE_BACK_FLUSH);