diff --git a/plat/intel/soc/stratix10/include/s10_clock_manager.h b/plat/intel/soc/stratix10/include/s10_clock_manager.h
index 99eb7a6..c800b9c 100644
--- a/plat/intel/soc/stratix10/include/s10_clock_manager.h
+++ b/plat/intel/soc/stratix10/include/s10_clock_manager.h
@@ -50,10 +50,13 @@
 #define ALT_CLKMGR_MAINPLL_VCOCALIB_HSCNT_SET(x) (((x) << 0) & 0x000000ff)
 #define ALT_CLKMGR_MAINPLL_VCOCALIB_MSCNT_SET(x) (((x) << 9) & 0x0001fe00)
 
-#define ALT_CLKMGR_MAINPLL_PLLGLOB_PSRC(x)	(((x) & 0x00030000) >> 16)
-#define ALT_CLKMGR_MAINPLL_PLLGLOB_PSRC_EOSC1	0x0
-#define ALT_CLKMGR_MAINPLL_PLLGLOB_PSRC_INTOSC	0x1
-#define ALT_CLKMGR_MAINPLL_PLLGLOB_PSRC_F2S	0x2
+#define ALT_CLKMGR_PSRC(x)			(((x) & 0x00030000) >> 16)
+#define ALT_CLKMGR_SRC_MAIN			0
+#define ALT_CLKMGR_SRC_PER			1
+
+#define ALT_CLKMGR_PLLGLOB_PSRC_EOSC1		0x0
+#define ALT_CLKMGR_PLLGLOB_PSRC_INTOSC		0x1
+#define ALT_CLKMGR_PLLGLOB_PSRC_F2S		0x2
 
 #define ALT_CLKMGR_PERPLL			0xffd100a4
 #define ALT_CLKMGR_PERPLL_EN			0x0
@@ -83,14 +86,11 @@
 #define ALT_CLKMGR_PERPLL_VCOCALIB_MSCNT_SET(x) (((x) << 9) & 0x0001fe00)
 #define ALT_CLKMGR_PERPLL_VCOCALIB		0x58
 
-
-typedef struct {
-	uint32_t  clk_freq_of_eosc1;
-	uint32_t  clk_freq_of_f2h_free;
-	uint32_t  clk_freq_of_cb_intosc_ls;
-} CLOCK_SOURCE_CONFIG;
+#define ALT_CLKMGR_INTOSC_HZ			460000000
 
 void config_clkmgr_handoff(handoff *hoff_ptr);
-int get_wdt_clk(handoff *hoff_ptr);
+uint32_t get_wdt_clk(void);
+uint32_t get_uart_clk(void);
+uint32_t get_mmc_clk(void);
 
 #endif