From dad12d11380882616872a8243a9c3f706fcedd31 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Fri, 6 Dec 2013 10:52:58 -0800 Subject: ARM: OMAP2+: Add support for legacy auxdata for twl As we currently need to support a mix of legacy platform data and device tree intialized data, let's make sure things keep working for the TWL GPIOs. Mostly the issue is caused by the fact that DSS does not yet have device tree bindings, so we need to rely on the TWL GPIO callback for setting up things like LCD backlight for some boards. As of_platform_populate() for the TWL GPIO is called by twl-core after the I2C bus has been initialized, we cannot pass the auxdata table from the board init code to twl-core like we used to with just legacy platform data. So let's use the omap_device bus hook to patch in the platform data for TWL GPIO until we have sorted out the issues with the TWL GPIOs and device tree bindings. The other option was be to initialize twl core using legacy platform data, which seems like a step backwards as we're moving to device tree only initialization. And we really don't want to add custom configuration functions to the TWL GPIO driver either for this. Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/common.h | 1 + arch/arm/mach-omap2/omap_device.c | 2 ++ arch/arm/mach-omap2/pdata-quirks.c | 16 ++++++++++++++++ 3 files changed, 19 insertions(+) (limited to 'arch/arm') diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h index e30ef6797c6..240db38f232 100644 --- a/arch/arm/mach-omap2/common.h +++ b/arch/arm/mach-omap2/common.h @@ -293,6 +293,7 @@ static inline void omap4_cpu_resume(void) #endif void pdata_quirks_init(struct of_device_id *); +void omap_auxdata_legacy_init(struct device *dev); void omap_pcs_legacy_init(int irq, void (*rearm)(void)); struct omap_sdrc_params; diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c index 53f0735817b..828f538b1c4 100644 --- a/arch/arm/mach-omap2/omap_device.c +++ b/arch/arm/mach-omap2/omap_device.c @@ -36,6 +36,7 @@ #include #include +#include "common.h" #include "soc.h" #include "omap_device.h" #include "omap_hwmod.h" @@ -200,6 +201,7 @@ static int _omap_device_notifier_call(struct notifier_block *nb, case BUS_NOTIFY_ADD_DEVICE: if (pdev->dev.of_node) omap_device_build_from_dt(pdev); + omap_auxdata_legacy_init(dev); /* fall through */ default: od = to_omap_device(pdev); diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c index 6a7554515b6..47afff3b9c3 100644 --- a/arch/arm/mach-omap2/pdata-quirks.c +++ b/arch/arm/mach-omap2/pdata-quirks.c @@ -27,6 +27,7 @@ struct pdata_init { }; struct of_dev_auxdata omap_auxdata_lookup[]; +static struct twl4030_gpio_platform_data twl_gpio_auxdata; /* * Create alias for USB host PHY clock. @@ -136,6 +137,21 @@ void omap_pcs_legacy_init(int irq, void (*rearm)(void)) pcs_pdata.rearm = rearm; } +/* + * GPIOs for TWL are initialized by the I2C bus and need custom + * handing until DSS has device tree bindings. + */ +void omap_auxdata_legacy_init(struct device *dev) +{ + if (dev->platform_data) + return; + + if (strcmp("twl4030-gpio", dev_name(dev))) + return; + + dev->platform_data = &twl_gpio_auxdata; +} + /* * Few boards still need auxdata populated before we populate * the dev entries in of_platform_populate(). -- cgit v1.2.3-70-g09d2