Hi Ajay,
On 7 December 2014 at 23:45, Ajay kumar ajaynumb@gmail.com wrote:
Hi,
On Fri, Dec 5, 2014 at 10:12 PM, Simon Glass sjg@google.com wrote:
Hi,
On 5 December 2014 at 08:42, Sjoerd Simons sjoerd.simons@collabora.co.uk wrote:
On Fri, 2014-12-05 at 19:43 +0530, Ajay Kumar wrote:
Add code to support powerup sequence for peach-pi LCD.
Signed-off-by: Ajay Kumar ajaykumar.rs@samsung.com
board/samsung/smdk5420/smdk5420.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-)
diff --git a/board/samsung/smdk5420/smdk5420.c b/board/samsung/smdk5420/smdk5420.c index a691222..915125e 100644 --- a/board/samsung/smdk5420/smdk5420.c +++ b/board/samsung/smdk5420/smdk5420.c @@ -73,19 +73,24 @@ void exynos_lcd_power_on(void)
mdelay(5);
/* TODO(ajaykumar.rs@samsung.com): Use device tree */gpio_request(EXYNOS5420_GPIO_X35, "edp_slp#");gpio_direction_output(EXYNOS5420_GPIO_X35, 1); /* EDP_SLP# */mdelay(10);gpio_request(EXYNOS5420_GPIO_Y77, "edp_rst#");gpio_direction_output(EXYNOS5420_GPIO_Y77, 1); /* EDP_RST# */gpio_request(EXYNOS5420_GPIO_X26, "edp_hpd");gpio_direction_input(EXYNOS5420_GPIO_X26); /* EDP_HPD */gpio_set_pull(EXYNOS5420_GPIO_X26, S5P_GPIO_PULL_NONE);if (has_edp_bridge())
if (has_edp_bridge()) {/* TODO(ajaykumar.rs@samsung.com): Use device tree */gpio_request(EXYNOS5420_GPIO_X35, "edp_slp#");gpio_direction_output(EXYNOS5420_GPIO_X35, 1); /* EDP_SLP# */mdelay(10);gpio_request(EXYNOS5420_GPIO_Y77, "edp_rst#");gpio_direction_output(EXYNOS5420_GPIO_Y77, 1); /* EDP_RST# */gpio_request(EXYNOS5420_GPIO_X26, "edp_hpd");gpio_direction_input(EXYNOS5420_GPIO_X26); /* EDP_HPD */gpio_set_pull(EXYNOS5420_GPIO_X26, S5P_GPIO_PULL_NONE);if (parade_init(gd->fdt_blob)) printf("%s: ps8625_init() failed\n", __func__);} else {gpio_request(EXYNOS5420_GPIO_X26, "edp_hpd");gpio_direction_input(EXYNOS5420_GPIO_X26); /* EDP_HPD */gpio_set_pull(EXYNOS5420_GPIO_X26, S5P_GPIO_PULL_NONE);}Any chance you could switch to using device-tree while changing this area. On SMDK5420 and XU3 EXYNOS5420_GPIO_X26 is used for USB so there is a bit of a potentially nastly clash there.
Yes we should really do that.
I am trying to consolidate what all needs to be done for Exynos5250 and Exynos5420, in order to remove LCD routines from the board files. Here are my observations:
- A separate driver for ptn3460 should be created.
- Need a place holder for tps65090 FET settings.
- I am planning to move all the LCD_EN/BACKLIGHT_EN GPIOs to the "weak function definitions" in exynos_fb.c. In that case, we have a limitation. All boards under a specific
SOC should conform to use only device tree or use only define board level LCD routines. ex: smdk5250 and snow - both need to use device tree to specify LCD details, or both need to define LCD powerup routines. It cannot be like snow uses device tree, and smdk5250 defines LCD routines in smdk5250 board file.
Do any boards exist which don't use device tree? I think we can drop that old support.
For a recent Tegra series I used the kernel device tree binding and just picked out information about the regulators. It might be possible to do the same on Exynos. See for example get_backlight_info() in this patch: http://patchwork.ozlabs.org/patch/416675/
Regards, Simon