clk: mxs: get base address from device tree

Instead of using the static definitions, get clkctrl and digctl base
addresses with mapping from device tree.

Use macro on variable is not nice, but it's done here to save huge
pointless diff stat.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Mike Turquette <mturquette@linaro.org>

4 files changed, 37 insertions, 16 deletions

diff --git a/arch/arm/boot/dts/imx23.dtsi b/arch/arm/boot/dts/imx23.dtsi
index 27ce8070e187..8d37aa7430a3 100644
--- a/arch/arm/boot/dts/imx23.dtsi
+++ b/arch/arm/boot/dts/imx23.dtsi
@@ -295,6 +295,7 @@
                         };
 
                         digctl@8001c000 {
+                                compatible = "fsl,imx23-digctl";
                                 reg = <0x8001c000 2000>;
                                 status = "disabled";
                         };
diff --git a/arch/arm/boot/dts/imx28.dtsi b/arch/arm/boot/dts/imx28.dtsi
index c2f10d381f03..d306ff55e30f 100644
--- a/arch/arm/boot/dts/imx28.dtsi
+++ b/arch/arm/boot/dts/imx28.dtsi
@@ -647,6 +647,7 @@
                         };
 
                         digctl@8001c000 {
+                                compatible = "fsl,imx28-digctl";
                                 reg = <0x8001c000 0x2000>;
                                 interrupts = <89>;
                                 status = "disabled";
diff --git a/drivers/clk/mxs/clk-imx23.c b/drivers/clk/mxs/clk-imx23.c
index 46ae6bebe445..0c8fda48d0a2 100644
--- a/drivers/clk/mxs/clk-imx23.c
+++ b/drivers/clk/mxs/clk-imx23.c
@@ -15,11 +15,16 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 #include <mach/mx23.h>
 #include "clk.h"
 
-#define DIGCTRL                 MX23_IO_ADDRESS(MX23_DIGCTL_BASE_ADDR)
-#define CLKCTRL                 MX23_IO_ADDRESS(MX23_CLKCTRL_BASE_ADDR)
+static void __iomem *clkctrl;
+static void __iomem *digctrl;
+
+#define CLKCTRL clkctrl
+#define DIGCTRL digctrl
+
 #define PLLCTRL0                (CLKCTRL + 0x0000)
 #define CPU                     (CLKCTRL + 0x0020)
 #define HBUS                    (CLKCTRL + 0x0030)
@@ -100,6 +105,14 @@ int __init mx23_clocks_init(void)
         struct device_node *np;
         u32 i;
 
+        np = of_find_compatible_node(NULL, NULL, "fsl,imx23-digctl");
+        digctrl = of_iomap(np, 0);
+        WARN_ON(!digctrl);
+
+        np = of_find_compatible_node(NULL, NULL, "fsl,imx23-clkctrl");
+        clkctrl = of_iomap(np, 0);
+        WARN_ON(!clkctrl);
+
         clk_misc_init();
 
         clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000);
@@ -152,12 +165,9 @@ int __init mx23_clocks_init(void)
                         return PTR_ERR(clks[i]);
                 }
 
-        np = of_find_compatible_node(NULL, NULL, "fsl,imx23-clkctrl");
-        if (np) {
-                clk_data.clks = clks;
-                clk_data.clk_num = ARRAY_SIZE(clks);
-                of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
-        }
+        clk_data.clks = clks;
+        clk_data.clk_num = ARRAY_SIZE(clks);
+        of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 
         for (i = 0; i < ARRAY_SIZE(clks_init_on); i++)
                 clk_prepare_enable(clks[clks_init_on[i]]);
diff --git a/drivers/clk/mxs/clk-imx28.c b/drivers/clk/mxs/clk-imx28.c
index fb30cd92b234..f623fdd93b46 100644
--- a/drivers/clk/mxs/clk-imx28.c
+++ b/drivers/clk/mxs/clk-imx28.c
@@ -15,10 +15,13 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 #include <mach/mx28.h>
 #include "clk.h"
 
-#define CLKCTRL                 MX28_IO_ADDRESS(MX28_CLKCTRL_BASE_ADDR)
+static void __iomem *clkctrl;
+#define CLKCTRL clkctrl
+
 #define PLL0CTRL0               (CLKCTRL + 0x0000)
 #define PLL1CTRL0               (CLKCTRL + 0x0020)
 #define PLL2CTRL0               (CLKCTRL + 0x0040)
@@ -52,7 +55,8 @@
 #define BP_FRAC0_IO1FRAC        16
 #define BP_FRAC0_IO0FRAC        24
 
-#define DIGCTRL                 MX28_IO_ADDRESS(MX28_DIGCTL_BASE_ADDR)
+static void __iomem *digctrl;
+#define DIGCTRL digctrl
 #define BP_SAIF_CLKMUX          10
 
 /*
@@ -155,6 +159,14 @@ int __init mx28_clocks_init(void)
         struct device_node *np;
         u32 i;
 
+        np = of_find_compatible_node(NULL, NULL, "fsl,imx28-digctl");
+        digctrl = of_iomap(np, 0);
+        WARN_ON(!digctrl);
+
+        np = of_find_compatible_node(NULL, NULL, "fsl,imx28-clkctrl");
+        clkctrl = of_iomap(np, 0);
+        WARN_ON(!clkctrl);
+
         clk_misc_init();
 
         clks[ref_xtal] = mxs_clk_fixed("ref_xtal", 24000000);
@@ -230,12 +242,9 @@ int __init mx28_clocks_init(void)
                         return PTR_ERR(clks[i]);
                 }
 
-        np = of_find_compatible_node(NULL, NULL, "fsl,imx28-clkctrl");
-        if (np) {
-                clk_data.clks = clks;
-                clk_data.clk_num = ARRAY_SIZE(clks);
-                of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
-        }
+        clk_data.clks = clks;
+        clk_data.clk_num = ARRAY_SIZE(clks);
+        of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 
         clk_register_clkdev(clks[enet_out], NULL, "enet_out");