ARM: OMAP: mcbsp: Start generalize omap2_mcbsp_set_clks_src
This generalizes the omap2_mcbsp_set_clks_src implementation between generic
McBSP and OMAP2 specific McBSP code. Currently this function is used to
select either internal fclk or clks pin as a McBSP CLKS source on OMAP2+.
Implement generalization by having an optional set_clk_src function pointer
in platform data that is used to select parent for a given clock. Idea is to
pass higher level source clock name (later coming from client driver) that
platform specific code will map to platform specific clock name.
API cleanup between McBSP and client code comes later.
Signed-off-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c
index 92bd5e2..3dd4c47 100644
--- a/arch/arm/mach-omap2/mcbsp.c
+++ b/arch/arm/mach-omap2/mcbsp.c
@@ -63,37 +63,30 @@
EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
/* McBSP CLKS source switching function */
-
-int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
+static int omap2_mcbsp_set_clk_src(struct device *dev, struct clk *clk,
+ const char *src)
{
- struct omap_mcbsp *mcbsp;
struct clk *fck_src;
char *fck_src_name;
int r;
- if (!omap_mcbsp_check_valid_id(id)) {
- pr_err("%s: Invalid id (%d)\n", __func__, id + 1);
- return -EINVAL;
- }
- mcbsp = id_to_mcbsp_ptr(id);
-
- if (fck_src_id == MCBSP_CLKS_PAD_SRC)
+ if (!strcmp(src, "clks_ext"))
fck_src_name = "pad_fck";
- else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
+ else if (!strcmp(src, "clks_fclk"))
fck_src_name = "prcm_fck";
else
return -EINVAL;
- fck_src = clk_get(mcbsp->dev, fck_src_name);
+ fck_src = clk_get(dev, fck_src_name);
if (IS_ERR_OR_NULL(fck_src)) {
pr_err("omap-mcbsp: %s: could not clk_get() %s\n", "clks",
fck_src_name);
return -EINVAL;
}
- pm_runtime_put_sync(mcbsp->dev);
+ pm_runtime_put_sync(dev);
- r = clk_set_parent(mcbsp->fclk, fck_src);
+ r = clk_set_parent(clk, fck_src);
if (IS_ERR_VALUE(r)) {
pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
"clks", fck_src_name);
@@ -101,13 +94,12 @@
return -EINVAL;
}
- pm_runtime_get_sync(mcbsp->dev);
+ pm_runtime_get_sync(dev);
clk_put(fck_src);
return 0;
}
-EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
static int omap3_enable_st_clock(unsigned int id, bool enable)
{
@@ -188,6 +180,7 @@
name, oh->name);
return PTR_ERR(pdev);
}
+ pdata->set_clk_src = omap2_mcbsp_set_clk_src;
omap_mcbsp_count++;
return 0;
}