From 2b2d35230099613365ad6000f4d71086130b9e71 Mon Sep 17 00:00:00 2001 From: Jon Hunter Date: Tue, 5 Jun 2012 12:34:59 -0500 Subject: ARM: OMAP2+: Move dmtimer clock set function to dmtimer driver OMAP1 uses an architecture specific function for setting the dmtimer clock source, where as the OMAP2+ devices use the clock framework. Eventually OMAP1 device should also use the clock framework and hence we should not any architecture specific functions. For now move the OMAP2+ function for configuring the clock source into the dmtimer driver. Therefore, we do no longer need to specify an architecture specific function for setting the clock source for OMAP2+ devices. This will simplify device tree migration of the dmtimers for OMAP2+ devices. From now on, only OMAP1 devices should specify an architecture specific function for setting the clock source via the platform data set_dmtimer_src() function pointer. Signed-off-by: Jon Hunter Signed-off-by: Tony Lindgren --- arch/arm/plat-omap/dmtimer.c | 46 +++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-) (limited to 'arch/arm/plat-omap/dmtimer.c') diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c index 6510e5e7b7e3..6a7088972c55 100644 --- a/arch/arm/plat-omap/dmtimer.c +++ b/arch/arm/plat-omap/dmtimer.c @@ -397,6 +397,8 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_stop); int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) { int ret; + char *parent_name = NULL; + struct clk *fclk, *parent; struct dmtimer_platform_data *pdata; if (unlikely(!timer)) @@ -407,7 +409,49 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source) if (source < 0 || source >= 3) return -EINVAL; - ret = pdata->set_timer_src(timer->pdev, source); + /* + * FIXME: Used for OMAP1 devices only because they do not currently + * use the clock framework to set the parent clock. To be removed + * once OMAP1 migrated to using clock framework for dmtimers + */ + if (pdata->set_timer_src) + return pdata->set_timer_src(timer->pdev, source); + + fclk = clk_get(&timer->pdev->dev, "fck"); + if (IS_ERR_OR_NULL(fclk)) { + pr_err("%s: fck not found\n", __func__); + return -EINVAL; + } + + switch (source) { + case OMAP_TIMER_SRC_SYS_CLK: + parent_name = "sys_ck"; + break; + + case OMAP_TIMER_SRC_32_KHZ: + parent_name = "32k_ck"; + break; + + case OMAP_TIMER_SRC_EXT_CLK: + parent_name = "alt_ck"; + break; + } + + parent = clk_get(&timer->pdev->dev, parent_name); + if (IS_ERR_OR_NULL(parent)) { + pr_err("%s: %s not found\n", __func__, parent_name); + ret = -EINVAL; + goto out; + } + + ret = clk_set_parent(fclk, parent); + if (IS_ERR_VALUE(ret)) + pr_err("%s: failed to set %s as parent\n", __func__, + parent_name); + + clk_put(parent); +out: + clk_put(fclk); return ret; } -- cgit v1.2.3