From: Denis Carikli <denis@eukrea.com>
Date: Wed, 25 Jun 2014 12:41:36 +0000 (+0200)
Subject: ARM: i.MX25 clk: Use of_clk_init() for DT case
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=e9db15e3221f2efef205dc1df584a3ca21b58dfa;p=linux-beck.git

ARM: i.MX25 clk: Use of_clk_init() for DT case

Replace .init_time() hook with of_clk_init() for DT targets.

Based on:
  d4347ee ARM: i.MX27 clk: Use of_clk_init() for DT case

Signed-off-by: Denis Carikli <denis@eukrea.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
---

diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
index e759a6da9407..cab34c3e820b 100644
--- a/arch/arm/mach-imx/clk-imx25.c
+++ b/arch/arm/mach-imx/clk-imx25.c
@@ -32,8 +32,6 @@
 #include "hardware.h"
 #include "mx25.h"
 
-#define CRM_BASE	MX25_IO_ADDRESS(MX25_CRM_BASE_ADDR)
-
 #define CCM_MPCTL	0x00
 #define CCM_UPCTL	0x04
 #define CCM_CCTL	0x08
@@ -56,7 +54,7 @@
 #define CCM_LTR3	0x4c
 #define CCM_MCR		0x64
 
-#define ccm(x)	(CRM_BASE + (x))
+#define ccm(x)	(ccm_base + (x))
 
 static struct clk_onecell_data clk_data;
 
@@ -91,8 +89,11 @@ enum mx25_clks {
 
 static struct clk *clk[clk_max];
 
-static int __init __mx25_clocks_init(unsigned long osc_rate)
+static int __init __mx25_clocks_init(unsigned long osc_rate,
+				     void __iomem *ccm_base)
 {
+	BUG_ON(!ccm_base);
+
 	clk[dummy] = imx_clk_fixed("dummy", 0);
 	clk[osc] = imx_clk_fixed("osc", osc_rate);
 	clk[mpll] = imx_clk_pllv1("mpll", "osc", ccm(CCM_MPCTL));
@@ -240,7 +241,11 @@ static int __init __mx25_clocks_init(unsigned long osc_rate)
 
 int __init mx25_clocks_init(void)
 {
-	__mx25_clocks_init(24000000);
+	void __iomem *ccm;
+
+	ccm = ioremap(MX25_CRM_BASE_ADDR, SZ_16K);
+
+	__mx25_clocks_init(24000000, ccm);
 
 	clk_register_clkdev(clk[gpt1_ipg], "ipg", "imx-gpt.0");
 	clk_register_clkdev(clk[gpt_ipg_per], "per", "imx-gpt.0");
@@ -308,29 +313,29 @@ int __init mx25_clocks_init(void)
 	return 0;
 }
 
-int __init mx25_clocks_init_dt(void)
+static void __init mx25_clocks_init_dt(struct device_node *np)
 {
-	struct device_node *np;
+	struct device_node *refnp;
 	unsigned long osc_rate = 24000000;
+	void __iomem *ccm;
 
 	/* retrieve the freqency of fixed clocks from device tree */
-	for_each_compatible_node(np, NULL, "fixed-clock") {
+	for_each_compatible_node(refnp, NULL, "fixed-clock") {
 		u32 rate;
-		if (of_property_read_u32(np, "clock-frequency", &rate))
+		if (of_property_read_u32(refnp, "clock-frequency", &rate))
 			continue;
 
-		if (of_device_is_compatible(np, "fsl,imx-osc"))
+		if (of_device_is_compatible(refnp, "fsl,imx-osc"))
 			osc_rate = rate;
 	}
 
-	np = of_find_compatible_node(NULL, NULL, "fsl,imx25-ccm");
+	ccm = of_iomap(np, 0);
+	__mx25_clocks_init(osc_rate, ccm);
+
 	clk_data.clks = clk;
 	clk_data.clk_num = ARRAY_SIZE(clk);
 	of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 
-	__mx25_clocks_init(osc_rate);
-
 	mxc_timer_init_dt(of_find_compatible_node(NULL, NULL, "fsl,imx25-gpt"));
-
-	return 0;
 }
+CLK_OF_DECLARE(imx25_ccm, "fsl,imx25-ccm", mx25_clocks_init_dt);
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index d205f362cf29..e0632d1890ac 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -55,7 +55,6 @@ int mx25_clocks_init(void);
 int mx27_clocks_init(unsigned long fref);
 int mx31_clocks_init(unsigned long fref);
 int mx35_clocks_init(void);
-int mx25_clocks_init_dt(void);
 int mx31_clocks_init_dt(void);
 struct platform_device *mxc_register_gpio(char *name, int id,
 	resource_size_t iobase, resource_size_t iosize, int irq, int irq_high);
diff --git a/arch/arm/mach-imx/imx25-dt.c b/arch/arm/mach-imx/imx25-dt.c
index 42a65e067443..cf8032bae277 100644
--- a/arch/arm/mach-imx/imx25-dt.c
+++ b/arch/arm/mach-imx/imx25-dt.c
@@ -29,16 +29,10 @@ static const char * const imx25_dt_board_compat[] __initconst = {
 	NULL
 };
 
-static void __init imx25_timer_init(void)
-{
-	mx25_clocks_init_dt();
-}
-
 DT_MACHINE_START(IMX25_DT, "Freescale i.MX25 (Device Tree Support)")
 	.map_io		= mx25_map_io,
 	.init_early	= imx25_init_early,
 	.init_irq	= mx25_init_irq,
-	.init_time	= imx25_timer_init,
 	.init_machine	= imx25_dt_init,
 	.dt_compat	= imx25_dt_board_compat,
 	.restart	= mxc_restart,