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authorScott Wood <scottwood@freescale.com>2008-04-15 20:52:34 +0200
committerKumar Gala <galak@kernel.crashing.org>2008-04-17 08:01:40 +0200
commit3866409541b1ae87a2e42ee7f483843f1af56917 (patch)
treeff1a3f4a8f4d9540a8791db22d5b04bc5b7b1482 /arch/powerpc/sysdev/fsl_soc.c
parent[POWERPC] 83xx: mpc837x_rdb: add simple-bus compatible matching (diff)
downloadlinux-3866409541b1ae87a2e42ee7f483843f1af56917.tar.xz
linux-3866409541b1ae87a2e42ee7f483843f1af56917.zip
[POWERPC] fsl_soc: Factor fsl_get_sys_freq() out of the wdt and spi inits.
Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/sysdev/fsl_soc.c')
-rw-r--r--arch/powerpc/sysdev/fsl_soc.c70
1 files changed, 32 insertions, 38 deletions
diff --git a/arch/powerpc/sysdev/fsl_soc.c b/arch/powerpc/sysdev/fsl_soc.c
index 642e45e1f160..b6d6bdae95f2 100644
--- a/arch/powerpc/sysdev/fsl_soc.c
+++ b/arch/powerpc/sysdev/fsl_soc.c
@@ -75,6 +75,33 @@ phys_addr_t get_immrbase(void)
EXPORT_SYMBOL(get_immrbase);
+static u32 sysfreq = -1;
+
+u32 fsl_get_sys_freq(void)
+{
+ struct device_node *soc;
+ const u32 *prop;
+ int size;
+
+ if (sysfreq != -1)
+ return sysfreq;
+
+ soc = of_find_node_by_type(NULL, "soc");
+ if (!soc)
+ return -1;
+
+ prop = of_get_property(soc, "clock-frequency", &size);
+ if (!prop || size != sizeof(*prop) || *prop == 0)
+ prop = of_get_property(soc, "bus-frequency", &size);
+
+ if (prop && size == sizeof(*prop))
+ sysfreq = *prop;
+
+ of_node_put(soc);
+ return sysfreq;
+}
+EXPORT_SYMBOL(fsl_get_sys_freq);
+
#if defined(CONFIG_CPM2) || defined(CONFIG_QUICC_ENGINE) || defined(CONFIG_8xx)
static u32 brgfreq = -1;
@@ -516,9 +543,9 @@ arch_initcall(fsl_i2c_of_init);
static int __init mpc83xx_wdt_init(void)
{
struct resource r;
- struct device_node *soc, *np;
+ struct device_node *np;
struct platform_device *dev;
- const unsigned int *freq;
+ u32 freq = fsl_get_sys_freq();
int ret;
np = of_find_compatible_node(NULL, "watchdog", "mpc83xx_wdt");
@@ -528,19 +555,6 @@ static int __init mpc83xx_wdt_init(void)
goto nodev;
}
- soc = of_find_node_by_type(NULL, "soc");
-
- if (!soc) {
- ret = -ENODEV;
- goto nosoc;
- }
-
- freq = of_get_property(soc, "bus-frequency", NULL);
- if (!freq) {
- ret = -ENODEV;
- goto err;
- }
-
memset(&r, 0, sizeof(r));
ret = of_address_to_resource(np, 0, &r);
@@ -553,20 +567,16 @@ static int __init mpc83xx_wdt_init(void)
goto err;
}
- ret = platform_device_add_data(dev, freq, sizeof(int));
+ ret = platform_device_add_data(dev, &freq, sizeof(freq));
if (ret)
goto unreg;
- of_node_put(soc);
of_node_put(np);
-
return 0;
unreg:
platform_device_unregister(dev);
err:
- of_node_put(soc);
-nosoc:
of_node_put(np);
nodev:
return ret;
@@ -830,25 +840,9 @@ int __init fsl_spi_init(struct spi_board_info *board_infos,
sysclk = get_brgfreq();
#endif
if (sysclk == -1) {
- struct device_node *np;
- const u32 *freq;
- int size;
-
- np = of_find_node_by_type(NULL, "soc");
- if (!np)
+ sysclk = fsl_get_sys_freq();
+ if (sysclk == -1)
return -ENODEV;
-
- freq = of_get_property(np, "clock-frequency", &size);
- if (!freq || size != sizeof(*freq) || *freq == 0) {
- freq = of_get_property(np, "bus-frequency", &size);
- if (!freq || size != sizeof(*freq) || *freq == 0) {
- of_node_put(np);
- return -ENODEV;
- }
- }
-
- sysclk = *freq;
- of_node_put(np);
}
ret = of_fsl_spi_probe(NULL, "fsl,spi", sysclk, board_infos,