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/mach-omap2/omap_hwmod.c | 33 ++++++++++++++++++++++++++++----- 1 file changed, 28 insertions(+), 5 deletions(-) (limited to 'arch/arm/mach-omap2/omap_hwmod.c') diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c index b2c8e8760c80..ec0be6d32232 100644 --- a/arch/arm/mach-omap2/omap_hwmod.c +++ b/arch/arm/mach-omap2/omap_hwmod.c @@ -1,7 +1,7 @@ /* * omap_hwmod implementation for OMAP2/3/4 * - * Copyright (C) 2009 Nokia Corporation + * Copyright (C) 2009-2010 Nokia Corporation * * Paul Walmsley, Benoît Cousson, Kevin Hilman * @@ -1069,12 +1069,12 @@ static int _setup(struct omap_hwmod *oh, void *data) u32 omap_hwmod_readl(struct omap_hwmod *oh, u16 reg_offs) { - return __raw_readl(oh->_rt_va + reg_offs); + return __raw_readl(oh->_mpu_rt_va + reg_offs); } void omap_hwmod_writel(u32 v, struct omap_hwmod *oh, u16 reg_offs) { - __raw_writel(v, oh->_rt_va + reg_offs); + __raw_writel(v, oh->_mpu_rt_va + reg_offs); } int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode) @@ -1131,7 +1131,7 @@ int omap_hwmod_register(struct omap_hwmod *oh) ms_id = _find_mpu_port_index(oh); if (!IS_ERR_VALUE(ms_id)) { oh->_mpu_port_index = ms_id; - oh->_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); + oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index); } else { oh->_int_flags |= _HWMOD_NO_MPU_PORT; } @@ -1283,7 +1283,7 @@ int omap_hwmod_unregister(struct omap_hwmod *oh) pr_debug("omap_hwmod: %s: unregistering\n", oh->name); mutex_lock(&omap_hwmod_mutex); - iounmap(oh->_rt_va); + iounmap(oh->_mpu_rt_va); list_del(&oh->node); mutex_unlock(&omap_hwmod_mutex); @@ -1543,6 +1543,29 @@ struct powerdomain *omap_hwmod_get_pwrdm(struct omap_hwmod *oh) } +/** + * omap_hwmod_get_mpu_rt_va - return the module's base address (for the MPU) + * @oh: struct omap_hwmod * + * + * Returns the virtual address corresponding to the beginning of the + * module's register target, in the address range that is intended to + * be used by the MPU. Returns the virtual address upon success or NULL + * upon error. + */ +void __iomem *omap_hwmod_get_mpu_rt_va(struct omap_hwmod *oh) +{ + if (!oh) + return NULL; + + if (oh->_int_flags & _HWMOD_NO_MPU_PORT) + return NULL; + + if (oh->_state == _HWMOD_STATE_UNKNOWN) + return NULL; + + return oh->_mpu_rt_va; +} + /** * omap_hwmod_add_initiator_dep - add sleepdep from @init_oh to @oh * @oh: struct omap_hwmod * -- cgit v1.2.3