clk: ux500: Add Device Tree support for the PRCC Peripheral clock

This patch enables clocks to be specified from Device Tree via phandles to the "prcc-periph-clock" node. Acked-by: Mike Turquette <[email protected]> Signed-off-by: Lee Jones <[email protected]> Signed-off-by: Linus Walleij <[email protected]>
kawasaki · Sep 26, 2013 · 2d08030 · 2d08030
1 parent f9fcb8e
commit 2d08030
Showing 1 changed file with 52 additions and 0 deletions.
diff --git a/drivers/clk/ux500/u8500_of_clk.c b/drivers/clk/ux500/u8500_of_clk.c
@@ -15,10 +15,16 @@
 #include <linux/platform_data/clk-ux500.h>
 #include "clk.h"
 
+#define PRCC_NUM_PERIPH_CLUSTERS 6
+#define PRCC_PERIPHS_PER_CLUSTER 32
+
 static struct clk *prcmu_clk[PRCMU_NUM_CLKS];
+static struct clk *prcc_pclk[(PRCC_NUM_PERIPH_CLUSTERS + 1) * PRCC_PERIPHS_PER_CLUSTER];
 
 #define PRCC_SHOW(clk, base, bit) \
 	clk[(base * PRCC_PERIPHS_PER_CLUSTER) + bit]
+#define PRCC_PCLK_STORE(clk, base, bit)	\
+	prcc_pclk[(base * PRCC_PERIPHS_PER_CLUSTER) + bit] = clk
 
 struct clk *ux500_twocell_get(struct of_phandle_args *clkspec, void *data)
 {
@@ -237,135 +243,179 @@ void u8500_of_clk_init(u32 clkrst1_base, u32 clkrst2_base, u32 clkrst3_base,
 	/* PRCC P-clocks */
 	clk = clk_reg_prcc_pclk("p1_pclk0", "per1clk", clkrst1_base,
 				BIT(0), 0);
+	PRCC_PCLK_STORE(clk, 1, 0);
 
 	clk = clk_reg_prcc_pclk("p1_pclk1", "per1clk", clkrst1_base,
 				BIT(1), 0);
+	PRCC_PCLK_STORE(clk, 1, 1);
 
 	clk = clk_reg_prcc_pclk("p1_pclk2", "per1clk", clkrst1_base,
 				BIT(2), 0);
+	PRCC_PCLK_STORE(clk, 1, 2);
 
 	clk = clk_reg_prcc_pclk("p1_pclk3", "per1clk", clkrst1_base,
 				BIT(3), 0);
+	PRCC_PCLK_STORE(clk, 1, 3);
 
 	clk = clk_reg_prcc_pclk("p1_pclk4", "per1clk", clkrst1_base,
 				BIT(4), 0);
+	PRCC_PCLK_STORE(clk, 1, 4);
 
 	clk = clk_reg_prcc_pclk("p1_pclk5", "per1clk", clkrst1_base,
 				BIT(5), 0);
+	PRCC_PCLK_STORE(clk, 1, 5);
 
 	clk = clk_reg_prcc_pclk("p1_pclk6", "per1clk", clkrst1_base,
 				BIT(6), 0);
+	PRCC_PCLK_STORE(clk, 1, 6);
 
 	clk = clk_reg_prcc_pclk("p1_pclk7", "per1clk", clkrst1_base,
 				BIT(7), 0);
+	PRCC_PCLK_STORE(clk, 1, 7);
 
 	clk = clk_reg_prcc_pclk("p1_pclk8", "per1clk", clkrst1_base,
 				BIT(8), 0);
+	PRCC_PCLK_STORE(clk, 1, 8);
 
 	clk = clk_reg_prcc_pclk("p1_pclk9", "per1clk", clkrst1_base,
 				BIT(9), 0);
+	PRCC_PCLK_STORE(clk, 1, 9);
 
 	clk = clk_reg_prcc_pclk("p1_pclk10", "per1clk", clkrst1_base,
 				BIT(10), 0);
+	PRCC_PCLK_STORE(clk, 1, 10);
 
 	clk = clk_reg_prcc_pclk("p1_pclk11", "per1clk", clkrst1_base,
 				BIT(11), 0);
+	PRCC_PCLK_STORE(clk, 1, 11);
 
 	clk = clk_reg_prcc_pclk("p2_pclk0", "per2clk", clkrst2_base,
 				BIT(0), 0);
+	PRCC_PCLK_STORE(clk, 2, 0);
 
 	clk = clk_reg_prcc_pclk("p2_pclk1", "per2clk", clkrst2_base,
 				BIT(1), 0);
+	PRCC_PCLK_STORE(clk, 2, 1);
 
 	clk = clk_reg_prcc_pclk("p2_pclk2", "per2clk", clkrst2_base,
 				BIT(2), 0);
+	PRCC_PCLK_STORE(clk, 2, 2);
 
 	clk = clk_reg_prcc_pclk("p2_pclk3", "per2clk", clkrst2_base,
 				BIT(3), 0);
+	PRCC_PCLK_STORE(clk, 2, 3);
 
 	clk = clk_reg_prcc_pclk("p2_pclk4", "per2clk", clkrst2_base,
 				BIT(4), 0);
+	PRCC_PCLK_STORE(clk, 2, 4);
 
 	clk = clk_reg_prcc_pclk("p2_pclk5", "per2clk", clkrst2_base,
 				BIT(5), 0);
+	PRCC_PCLK_STORE(clk, 2, 5);
 
 	clk = clk_reg_prcc_pclk("p2_pclk6", "per2clk", clkrst2_base,
 				BIT(6), 0);
+	PRCC_PCLK_STORE(clk, 2, 6);
 
 	clk = clk_reg_prcc_pclk("p2_pclk7", "per2clk", clkrst2_base,
 				BIT(7), 0);
+	PRCC_PCLK_STORE(clk, 2, 7);
 
 	clk = clk_reg_prcc_pclk("p2_pclk8", "per2clk", clkrst2_base,
 				BIT(8), 0);
+	PRCC_PCLK_STORE(clk, 2, 8);
 
 	clk = clk_reg_prcc_pclk("p2_pclk9", "per2clk", clkrst2_base,
 				BIT(9), 0);
+	PRCC_PCLK_STORE(clk, 2, 9);
 
 	clk = clk_reg_prcc_pclk("p2_pclk10", "per2clk", clkrst2_base,
 				BIT(10), 0);
+	PRCC_PCLK_STORE(clk, 2, 10);
 
 	clk = clk_reg_prcc_pclk("p2_pclk11", "per2clk", clkrst2_base,
 				BIT(11), 0);
+	PRCC_PCLK_STORE(clk, 2, 1);
 
 	clk = clk_reg_prcc_pclk("p2_pclk12", "per2clk", clkrst2_base,
 				BIT(12), 0);
+	PRCC_PCLK_STORE(clk, 2, 12);
 
 	clk = clk_reg_prcc_pclk("p3_pclk0", "per3clk", clkrst3_base,
 				BIT(0), 0);
+	PRCC_PCLK_STORE(clk, 3, 0);
 
 	clk = clk_reg_prcc_pclk("p3_pclk1", "per3clk", clkrst3_base,
 				BIT(1), 0);
+	PRCC_PCLK_STORE(clk, 3, 1);
 
 	clk = clk_reg_prcc_pclk("p3_pclk2", "per3clk", clkrst3_base,
 				BIT(2), 0);
+	PRCC_PCLK_STORE(clk, 3, 2);
 
 	clk = clk_reg_prcc_pclk("p3_pclk3", "per3clk", clkrst3_base,
 				BIT(3), 0);
+	PRCC_PCLK_STORE(clk, 3, 3);
 
 	clk = clk_reg_prcc_pclk("p3_pclk4", "per3clk", clkrst3_base,
 				BIT(4), 0);
+	PRCC_PCLK_STORE(clk, 3, 4);
 
 	clk = clk_reg_prcc_pclk("p3_pclk5", "per3clk", clkrst3_base,
 				BIT(5), 0);
+	PRCC_PCLK_STORE(clk, 3, 5);
 
 	clk = clk_reg_prcc_pclk("p3_pclk6", "per3clk", clkrst3_base,
 				BIT(6), 0);
+	PRCC_PCLK_STORE(clk, 3, 6);
 
 	clk = clk_reg_prcc_pclk("p3_pclk7", "per3clk", clkrst3_base,
 				BIT(7), 0);
+	PRCC_PCLK_STORE(clk, 3, 7);
 
 	clk = clk_reg_prcc_pclk("p3_pclk8", "per3clk", clkrst3_base,
 				BIT(8), 0);
+	PRCC_PCLK_STORE(clk, 3, 8);
 
 	clk = clk_reg_prcc_pclk("p5_pclk0", "per5clk", clkrst5_base,
 				BIT(0), 0);
+	PRCC_PCLK_STORE(clk, 5, 0);
 
 	clk = clk_reg_prcc_pclk("p5_pclk1", "per5clk", clkrst5_base,
 				BIT(1), 0);
+	PRCC_PCLK_STORE(clk, 5, 1);
 
 	clk = clk_reg_prcc_pclk("p6_pclk0", "per6clk", clkrst6_base,
 				BIT(0), 0);
+	PRCC_PCLK_STORE(clk, 6, 0);
 
 	clk = clk_reg_prcc_pclk("p6_pclk1", "per6clk", clkrst6_base,
 				BIT(1), 0);
+	PRCC_PCLK_STORE(clk, 6, 1);
 
 	clk = clk_reg_prcc_pclk("p6_pclk2", "per6clk", clkrst6_base,
 				BIT(2), 0);
+	PRCC_PCLK_STORE(clk, 6, 2);
 
 	clk = clk_reg_prcc_pclk("p6_pclk3", "per6clk", clkrst6_base,
 				BIT(3), 0);
+	PRCC_PCLK_STORE(clk, 6, 3);
 
 	clk = clk_reg_prcc_pclk("p6_pclk4", "per6clk", clkrst6_base,
 				BIT(4), 0);
+	PRCC_PCLK_STORE(clk, 6, 4);
 
 	clk = clk_reg_prcc_pclk("p6_pclk5", "per6clk", clkrst6_base,
 				BIT(5), 0);
+	PRCC_PCLK_STORE(clk, 6, 5);
 
 	clk = clk_reg_prcc_pclk("p6_pclk6", "per6clk", clkrst6_base,
 				BIT(6), 0);
+	PRCC_PCLK_STORE(clk, 6, 6);
 
 	clk = clk_reg_prcc_pclk("p6_pclk7", "per6clk", clkrst6_base,
 				BIT(7), 0);
+	PRCC_PCLK_STORE(clk, 6, 7);
 
 	/* PRCC K-clocks
 	 *
@@ -464,5 +514,7 @@ void u8500_of_clk_init(u32 clkrst1_base, u32 clkrst2_base, u32 clkrst3_base,
 			clk_data.clk_num = ARRAY_SIZE(prcmu_clk);
 			of_clk_add_provider(child, of_clk_src_onecell_get, &clk_data);
 		}
+		if (!of_node_cmp(child->name, "prcc-periph-clock"))
+			of_clk_add_provider(child, ux500_twocell_get, prcc_pclk);
 	}
 }