On Thu, Jul 12, 2012 at 08:25:09AM -0700, Simon Glass wrote:
> This driver supports driving a single LCD and providing a U-Boot console
> on it.
>
> Signed-off-by: Simon Glass <s...@chromium.org>
> ---
> Changes in v2:
> - Update LCD driver to deal with new fdt bindings
>
> Changes in v3:
> - Adjust LCD driver to use new SOC display driver structures
> - Move some fdt decode code from LCD driver to SOC display driver
> - Rename fdt config structures
> - Use new pwm binding from pre-linux-next
>
> drivers/video/Makefile | 1 +
> drivers/video/tegra.c | 357
> ++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 358 insertions(+), 0 deletions(-)
> create mode 100644 drivers/video/tegra.c
>
[...]
> diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c
[...]
> +static int fdt_decode_lcd(const void *blob, struct fdt_panel_config *config)
> +{
> + int err;
> + int display_node;
> +
> + disp_config = tegra_display_get_config();
> + if (!disp_config) {
> + debug("%s: Display controller is not configured\n", __func__);
> + return -1;
> + }
> + display_node = disp_config->panel_node;
> + if (display_node < 0) {
> + debug("%s: No panel configuration available\n", __func__);
> + return -1;
> + }
> +
> + config->pwm_channel = pwm_request(blob, display_node, "nvidia,pwm");
> + if (config->pwm_channel < 0) {
> + debug("%s: Unable to request PWM channel\n", __func__);
> + return -1;
> + }
> +
> + config->cache_type = fdtdec_get_int(blob, display_node,
> + "nvidia,cache-type",
> + FDT_LCD_CACHE_WRITE_BACK_FLUSH);
> +
> + err = fdtdec_decode_gpio(blob, display_node,
> + "nvidia,backlight-enable-gpios",
> + &config->backlight_en);
> + err |= fdtdec_decode_gpio(blob, display_node,
> + "nvidia,lvds-shutdown-gpios", &config->lvds_shutdown);
> + fdtdec_decode_gpio(blob, display_node, "nvidia,backlight-vdd-gpios",
> + &config->backlight_vdd);
> + err |= fdtdec_decode_gpio(blob, display_node, "nvidia,panel-vdd-gpios",
> + &config->panel_vdd);
> + if (err)
> + return -FDT_ERR_NOTFOUND;This effectively makes those GPIOs mandatory. The Medcom, however, doesn't have any of these, so I had to comment this return out to test the series. I know that this might be an unusual setup, but it's something that needs to be supported anyway. Thierry
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