1 files changed, 80 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c
index 88b8790e4fe..f9c9df5b5ff 100644
--- a/arch/arm/mach-omap2/mcbsp.c
+++ b/arch/arm/mach-omap2/mcbsp.c
@@ -23,6 +23,86 @@
 #include <plat/cpu.h>
 #include <plat/mcbsp.h>
 
+#include "control.h"
+
+
+/* McBSP internal signal muxing functions */
+
+void omap2_mcbsp1_mux_clkr_src(u8 mux)
+{
+	u32 v;
+
+	v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
+	if (mux == CLKR_SRC_CLKR)
+		v &= ~OMAP2_MCBSP1_CLKR_MASK;
+	else if (mux == CLKR_SRC_CLKX)
+		v |= OMAP2_MCBSP1_CLKR_MASK;
+	omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
+}
+EXPORT_SYMBOL(omap2_mcbsp1_mux_clkr_src);
+
+void omap2_mcbsp1_mux_fsr_src(u8 mux)
+{
+	u32 v;
+
+	v = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
+	if (mux == FSR_SRC_FSR)
+		v &= ~OMAP2_MCBSP1_FSR_MASK;
+	else if (mux == FSR_SRC_FSX)
+		v |= OMAP2_MCBSP1_FSR_MASK;
+	omap_ctrl_writel(v, OMAP2_CONTROL_DEVCONF0);
+}
+EXPORT_SYMBOL(omap2_mcbsp1_mux_fsr_src);
+
+/* McBSP CLKS source switching function */
+
+int omap2_mcbsp_set_clks_src(u8 id, u8 fck_src_id)
+{
+	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)
+		fck_src_name = "pad_fck";
+	else if (fck_src_id == MCBSP_CLKS_PRCM_SRC)
+		fck_src_name = "prcm_fck";
+	else
+		return -EINVAL;
+
+	fck_src = clk_get(mcbsp->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;
+	}
+
+	clk_disable(mcbsp->fclk);
+
+	r = clk_set_parent(mcbsp->fclk, fck_src);
+	if (IS_ERR_VALUE(r)) {
+		pr_err("omap-mcbsp: %s: could not clk_set_parent() to %s\n",
+		       "clks", fck_src_name);
+		clk_put(fck_src);
+		return -EINVAL;
+	}
+
+	clk_enable(mcbsp->fclk);
+
+	clk_put(fck_src);
+
+	return 0;
+}
+EXPORT_SYMBOL(omap2_mcbsp_set_clks_src);
+
+
+/* Platform data */
 
 #ifdef CONFIG_ARCH_OMAP2420
 static struct omap_mcbsp_platform_data omap2420_mcbsp_pdata[] = {