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authorShawn Guo <shawn.guo@linaro.org>2013-05-10 06:19:01 +0400
committerShawn Guo <shawn.guo@linaro.org>2013-06-17 11:45:10 +0400
commitc1e31d126b4db6a3a8d96883fae40fe22d5eba65 (patch)
tree88dc2c60a53d0f6ad84545de3975f43b6b7b7b51
parent18cb680f1a003a1a1ec0e6097d7b763516a27f04 (diff)
downloadlinux-c1e31d126b4db6a3a8d96883fae40fe22d5eba65.tar.xz
ARM: imx: create mxc_arch_reset_init_dt() for DT boot
The mxc_arch_reset_init() uses static mapping and calls clk_get_sys() to get clock. It's suitable for non-DT boot but not for DT boot where dynamic mapping and of_clk_get() should be used instead. Create mxc_arch_reset_init_dt() as the DT variant of mxc_arch_reset_init(), and change DT platforms to use it. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
-rw-r--r--arch/arm/mach-imx/common.h1
-rw-r--r--arch/arm/mach-imx/imx25-dt.c3
-rw-r--r--arch/arm/mach-imx/imx27-dt.c3
-rw-r--r--arch/arm/mach-imx/imx31-dt.c3
-rw-r--r--arch/arm/mach-imx/imx51-dt.c3
-rw-r--r--arch/arm/mach-imx/mach-imx53.c2
-rw-r--r--arch/arm/mach-imx/system.c20
7 files changed, 26 insertions, 9 deletions
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index c08ae3f99cee..963971e11f6a 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -74,6 +74,7 @@ extern struct platform_device *mxc_register_gpio(char *name, int id,
extern void mxc_set_cpu_type(unsigned int type);
extern void mxc_restart(char, const char *);
extern void mxc_arch_reset_init(void __iomem *);
+extern void mxc_arch_reset_init_dt(void);
extern int mx53_revision(void);
extern int imx6q_revision(void);
extern int mx53_display_revision(void);
diff --git a/arch/arm/mach-imx/imx25-dt.c b/arch/arm/mach-imx/imx25-dt.c
index ec339917fbf4..3e1ec5ffe630 100644
--- a/arch/arm/mach-imx/imx25-dt.c
+++ b/arch/arm/mach-imx/imx25-dt.c
@@ -15,12 +15,11 @@
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include "common.h"
-#include "hardware.h"
#include "mx25.h"
static void __init imx25_dt_init(void)
{
- mxc_arch_reset_init(MX25_IO_ADDRESS(MX25_WDOG_BASE_ADDR));
+ mxc_arch_reset_init_dt();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
diff --git a/arch/arm/mach-imx/imx27-dt.c b/arch/arm/mach-imx/imx27-dt.c
index 93aef1aa0a8e..4e235ecb4021 100644
--- a/arch/arm/mach-imx/imx27-dt.c
+++ b/arch/arm/mach-imx/imx27-dt.c
@@ -16,14 +16,13 @@
#include <asm/mach/time.h>
#include "common.h"
-#include "hardware.h"
#include "mx27.h"
static void __init imx27_dt_init(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
- mxc_arch_reset_init(MX27_IO_ADDRESS(MX27_WDOG_BASE_ADDR));
+ mxc_arch_reset_init_dt();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
diff --git a/arch/arm/mach-imx/imx31-dt.c b/arch/arm/mach-imx/imx31-dt.c
index d8b3b22aeba7..818a1cc2fe45 100644
--- a/arch/arm/mach-imx/imx31-dt.c
+++ b/arch/arm/mach-imx/imx31-dt.c
@@ -16,12 +16,11 @@
#include <asm/mach/time.h>
#include "common.h"
-#include "hardware.h"
#include "mx31.h"
static void __init imx31_dt_init(void)
{
- mxc_arch_reset_init(MX31_IO_ADDRESS(MX31_WDOG_BASE_ADDR));
+ mxc_arch_reset_init_dt();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
}
diff --git a/arch/arm/mach-imx/imx51-dt.c b/arch/arm/mach-imx/imx51-dt.c
index 55f47a0f98c0..53e43e579dd7 100644
--- a/arch/arm/mach-imx/imx51-dt.c
+++ b/arch/arm/mach-imx/imx51-dt.c
@@ -17,14 +17,13 @@
#include <asm/mach/time.h>
#include "common.h"
-#include "hardware.h"
#include "mx51.h"
static void __init imx51_dt_init(void)
{
struct platform_device_info devinfo = { .name = "cpufreq-cpu0", };
- mxc_arch_reset_init(MX51_IO_ADDRESS(MX51_WDOG1_BASE_ADDR));
+ mxc_arch_reset_init_dt();
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
platform_device_register_full(&devinfo);
diff --git a/arch/arm/mach-imx/mach-imx53.c b/arch/arm/mach-imx/mach-imx53.c
index 7a5656128b60..74e7b94c22e7 100644
--- a/arch/arm/mach-imx/mach-imx53.c
+++ b/arch/arm/mach-imx/mach-imx53.c
@@ -39,7 +39,7 @@ static void __init imx53_qsb_init(void)
static void __init imx53_dt_init(void)
{
- mxc_arch_reset_init(MX53_IO_ADDRESS(MX53_WDOG1_BASE_ADDR));
+ mxc_arch_reset_init_dt();
if (of_machine_is_compatible("fsl,imx53-qsb"))
imx53_qsb_init();
diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
index 02cf449094f1..7cdc79a9657c 100644
--- a/arch/arm/mach-imx/system.c
+++ b/arch/arm/mach-imx/system.c
@@ -21,6 +21,8 @@
#include <linux/io.h>
#include <linux/err.h>
#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
#include <asm/system_misc.h>
#include <asm/proc-fns.h>
@@ -75,3 +77,21 @@ void __init mxc_arch_reset_init(void __iomem *base)
clk_prepare(wdog_clk);
}
+
+void __init mxc_arch_reset_init_dt(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,imx21-wdt");
+ wdog_base = of_iomap(np, 0);
+ WARN_ON(!wdog_base);
+
+ wdog_clk = of_clk_get(np, 0);
+ if (IS_ERR(wdog_clk)) {
+ pr_warn("%s: failed to get wdog clock\n", __func__);
+ wdog_clk = NULL;
+ return;
+ }
+
+ clk_prepare(wdog_clk);
+}