From 3b972bf06c22f5abfa6586a8baf50321cd825965 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 20 Feb 2012 09:43:29 -0800 Subject: ARM: OMAP2+: Split omap2_hsmmc_init() to properly support I2C GPIO pins Otherwise omap_device_build() and omap_mux related functions can't be marked as __init when twl is build as a module. If a board is using GPIO pins or regulators configured by an external chip, such as TWL PMIC on I2C bus, the board must mark those MMC controllers as deferred. Additionally both omap_hsmmc_init() and omap_hsmmc_late_init() must be called by the board. For MMC controllers using internal GPIO pins for card detect and regulators the slots don't need to be marked deferred. In this case calling omap_hsmmc_init() is sufficient. Only mark the MMC slots using gpio_cd or gpio_wd as deferred as noted by Igor Grinberg . Note that this patch does not change the behaviour for board-4430sdp.c board-omap4panda.c. These boards wrongly rely on the omap_hsmmc.c init function callback to configure the PMIC GPIO interrupt lines on external chip. If the PMIC interrupt lines are not configured during init, they will fail. Reported-by: Russell King Signed-off-by: Rajendra Nayak Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/board-igep0020.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-omap2/board-igep0020.c') diff --git a/arch/arm/mach-omap2/board-igep0020.c b/arch/arm/mach-omap2/board-igep0020.c index a59ace0ed560..e558800adfdf 100644 --- a/arch/arm/mach-omap2/board-igep0020.c +++ b/arch/arm/mach-omap2/board-igep0020.c @@ -295,6 +295,7 @@ static struct omap2_hsmmc_info mmc[] = { .caps = MMC_CAP_4_BIT_DATA, .gpio_cd = -EINVAL, .gpio_wp = -EINVAL, + .deferred = true, }, #if defined(CONFIG_LIBERTAS_SDIO) || defined(CONFIG_LIBERTAS_SDIO_MODULE) { @@ -402,7 +403,7 @@ static int igep_twl_gpio_setup(struct device *dev, /* gpio + 0 is "mmc0_cd" (input/IRQ) */ mmc[0].gpio_cd = gpio + 0; - omap2_hsmmc_init(mmc); + omap_hsmmc_late_init(mmc); /* TWL4030_GPIO_MAX + 1 == ledB (out, active low LED) */ #if !defined(CONFIG_LEDS_GPIO) && !defined(CONFIG_LEDS_GPIO_MODULE) @@ -639,6 +640,9 @@ static void __init igep_init(void) /* Get IGEP2 hardware revision */ igep2_get_revision(); + + omap_hsmmc_init(mmc); + /* Register I2C busses and drivers */ igep_i2c_init(); platform_add_devices(igep_devices, ARRAY_SIZE(igep_devices)); -- cgit v1.2.1