From db2a60bf2527209b42e6f512d5892089a835ceaa Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Mon, 26 Jul 2010 16:34:33 -0600 Subject: OMAP: hwmod/device: add omap_{device,hwmod}_get_mpu_rt_va Add omap_device_get_mpu_rt_va(). This is intended to be used by device drivers (currently, via a struct platform_data function pointer) to retrieve their corresponding device's virtual base address that the MPU should use to access the device. This is needed because the omap_hwmod code does its own ioremap(), in order to gain access to the module's OCP_SYSCONFIG register. Add omap_hwmod_get_mpu_rt_va(). omap_device_get_mpu_rt_va() calls this function to do the real work. While here, rename struct omap_hwmod._rt_va to struct omap_hwmod._mpu_rt_va, to reinforce that it refers to the MPU's register target virtual address base (as opposed to, for example, the L3's). In the future, this belongs as a function in an omap_bus, so it is not necessary to call this through a platform_data function pointer. The use-case for this function was originally presented by Santosh Shilimkar . Signed-off-by: Paul Walmsley Cc: Santosh Shilimkar --- arch/arm/plat-omap/omap_device.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'arch/arm/plat-omap/omap_device.c') diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index f9dec0d32fa..dee4629b7b4 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c @@ -655,6 +655,25 @@ struct powerdomain *omap_device_get_pwrdm(struct omap_device *od) return omap_hwmod_get_pwrdm(od->hwmods[0]); } +/** + * omap_device_get_mpu_rt_va - return the MPU's virtual addr for the hwmod base + * @od: struct omap_device * + * + * Return the MPU's virtual address for the base of the hwmod, from + * the ioremap() that the hwmod code does. Only valid if there is one + * hwmod associated with this device. Returns NULL if there are zero + * or more than one hwmods associated with this omap_device; + * otherwise, passes along the return value from + * omap_hwmod_get_mpu_rt_va(). + */ +void __iomem *omap_device_get_rt_va(struct omap_device *od) +{ + if (od->hwmods_cnt != 1) + return NULL; + + return omap_hwmod_get_mpu_rt_va(od->hwmods[0]); +} + /* * Public functions intended for use in omap_device_pm_latency * .activate_func and .deactivate_func function pointers -- cgit v1.2.3-70-g09d2