[PATCH v4 3/3] omap3: beaglexm: fix power on of DVI
From: nm@ti.com (Nishanth Menon)
Date: 2011-01-07 23:01:22
Also in:
linux-omap
Subsystem:
arm port, omap2+ support, the rest · Maintainers:
Russell King, Aaro Koskinen, Andreas Kemnade, Kevin Hilman, Roger Quadros, Tony Lindgren, Linus Torvalds
From: Koen Kooi <redacted> TFP410 DVI chip is used to provide display out. This chip is controlled by 2 lines: LDO which supplies the power is controlled over gpio + 2 and the enable of the chip itself is done over gpio + 1 NOTE: the LDO is necessary for LED, serial blocks as well. gpio + 1 was used to sense USB overcurrent in vanilla beagle. Without this fix, the display would not function as the LDO remains shut down. [nm at ti.com: split up, added descriptive changelogs] Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Koen Kooi <redacted> --- arch/arm/mach-omap2/board-omap3beagle.c | 20 +++++++++++++++++--- 1 files changed, 17 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index d628f5e..7c82730 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c@@ -293,9 +293,10 @@ static int beagle_twl_gpio_setup(struct device *dev, /* REVISIT: need ehci-omap hooks for external VBUS * power switch and overcurrent detect */ - - gpio_request(gpio + 1, "EHCI_nOC"); - gpio_direction_input(gpio + 1); + if (omap3_beagle_get_rev() != OMAP3BEAGLE_BOARD_XM) { + gpio_request(gpio + 1, "EHCI_nOC"); + gpio_direction_input(gpio + 1); + } /* * TWL4030_GPIO_MAX + 0 == ledA, EHCI nEN_USB_PWR (out, XM active
@@ -317,6 +318,19 @@ static int beagle_twl_gpio_setup(struct device *dev, /* TWL4030_GPIO_MAX + 1 == ledB, PMU_STAT (out, active low LED) */ gpio_leds[2].gpio = gpio + TWL4030_GPIO_MAX + 1; + /* + * gpio + 1 on Xm controls the TFP410's enable line (active low) + * gpio + 2 control varies depending on the board rev as follows: + * P7/P8 revisions(prototype): Camera EN + * A2+ revisions (production): LDO (supplies DVI, serial, led blocks) + */ + if (omap3_beagle_get_rev() == OMAP3BEAGLE_BOARD_XM) { + gpio_request(gpio + 1, "nDVI_PWR_EN"); + gpio_direction_output(gpio + 1, 0); + gpio_request(gpio + 2, "DVI_LDO_EN"); + gpio_direction_output(gpio + 2, 1); + } + return 0; }
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1.6.3.3