cpufreq: exynos: Fix the compile error

Commit 7da83a80 ("ARM: EXYNOS: Migrate Exynos specific macros from
plat to mach") which lands in samsung tree causes build breakage
for cpufreq-exynos like following:

drivers/cpufreq/exynos-cpufreq.c: In function 'exynos_cpufreq_probe':
drivers/cpufreq/exynos-cpufreq.c:166:2: error: implicit declaration of function 'soc_is_exynos4210'
[-Werror=implicit-function-declaration]
drivers/cpufreq/exynos-cpufreq.c:168:2: error: implicit declaration of function 'soc_is_exynos4212'
[-Werror=implicit-function-declaration]
drivers/cpufreq/exynos-cpufreq.c:168:2: error: implicit declaration of function 'soc_is_exynos4412'
[-Werror=implicit-function-declaration]
drivers/cpufreq/exynos-cpufreq.c:170:2: error: implicit declaration of function 'soc_is_exynos5250'
[-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[2]: *** [drivers/cpufreq/exynos-cpufreq.o] Error 1
make[2]: *** Waiting for unfinished jobs....
drivers/cpufreq/exynos4x12-cpufreq.c: In function 'exynos4x12_set_clkdiv':
drivers/cpufreq/exynos4x12-cpufreq.c:118:2: error: implicit declaration of function 'soc_is_exynos4212'
[-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[2]: *** [drivers/cpufreq/exynos4x12-cpufreq.o] Error 1
make[1]: *** [drivers/cpufreq] Error 2

This fixes above error with getting SoC information via
of_machine_is_compatible() instead of soc_is_exynosXXXX().

Suggested-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Jonghwan Choi <jhbird.choi@samsung.com>
[kgene.kim@samsung.com: fixed typo and modified as per Viresh's suggestion]
[kgene.kim@samsung.com: Rafael agreed]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 26 insertions, 12 deletions

diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index f99cfe24e7bc..e8a4a7ed38c1 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -17,6 +17,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/cpufreq.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
 
 #include <plat/cpu.h>
 
@@ -163,14 +164,22 @@ static int exynos_cpufreq_probe(struct platform_device *pdev)
         if (!exynos_info)
                 return -ENOMEM;
 
-        if (soc_is_exynos4210())
+        if (of_machine_is_compatible("samsung,exynos4210")) {
+                exynos_info->type = EXYNOS_SOC_4210;
                 ret = exynos4210_cpufreq_init(exynos_info);
-        else if (soc_is_exynos4212() || soc_is_exynos4412())
+        } else if (of_machine_is_compatible("samsung,exynos4212")) {
+                exynos_info->type = EXYNOS_SOC_4212;
                 ret = exynos4x12_cpufreq_init(exynos_info);
-        else if (soc_is_exynos5250())
+        } else if (of_machine_is_compatible("samsung,exynos4412")) {
+                exynos_info->type = EXYNOS_SOC_4412;
+                ret = exynos4x12_cpufreq_init(exynos_info);
+        } else if (of_machine_is_compatible("samsung,exynos5250")) {
+                exynos_info->type = EXYNOS_SOC_5250;
                 ret = exynos5250_cpufreq_init(exynos_info);
-        else
-                return 0;
+        } else {
+                pr_err("%s: Unknown SoC type\n", __func__);
+                return -ENODEV;
+        }
 
         if (ret)
                 goto err_vdd_arm;
diff --git a/drivers/cpufreq/exynos-cpufreq.h b/drivers/cpufreq/exynos-cpufreq.h
index 3ddade8a5125..f189547bb447 100644
--- a/drivers/cpufreq/exynos-cpufreq.h
+++ b/drivers/cpufreq/exynos-cpufreq.h
@@ -17,6 +17,13 @@ enum cpufreq_level_index {
         L20,
 };
 
+enum exynos_soc_type {
+        EXYNOS_SOC_4210,
+        EXYNOS_SOC_4212,
+        EXYNOS_SOC_4412,
+        EXYNOS_SOC_5250,
+};
+
 #define APLL_FREQ(f, a0, a1, a2, a3, a4, a5, a6, a7, b0, b1, b2, m, p, s) \
         { \
                 .freq = (f) * 1000, \
@@ -34,6 +41,7 @@ struct apll_freq {
 };
 
 struct exynos_dvfs_info {
+        enum exynos_soc_type type;
         unsigned long   mpll_freq_khz;
         unsigned int    pll_safe_idx;
         struct clk      *cpu_clk;
diff --git a/drivers/cpufreq/exynos4x12-cpufreq.c b/drivers/cpufreq/exynos4x12-cpufreq.c
index 466c76ad335b..63a3907ce578 100644
--- a/drivers/cpufreq/exynos4x12-cpufreq.c
+++ b/drivers/cpufreq/exynos4x12-cpufreq.c
@@ -100,7 +100,6 @@ static struct apll_freq apll_freq_4412[] = {
 static void exynos4x12_set_clkdiv(unsigned int div_index)
 {
         unsigned int tmp;
-        unsigned int stat_cpu1;
 
         /* Change Divider - CPU0 */
 
@@ -115,13 +114,11 @@ static void exynos4x12_set_clkdiv(unsigned int div_index)
         tmp = apll_freq_4x12[div_index].clk_div_cpu1;
 
         __raw_writel(tmp, EXYNOS4_CLKDIV_CPU1);
-        if (soc_is_exynos4212())
-                stat_cpu1 = 0x11;
-        else
-                stat_cpu1 = 0x111;
 
-        while (__raw_readl(EXYNOS4_CLKDIV_STATCPU1) & stat_cpu1)
+        do {
                 cpu_relax();
+                tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU1);
+        } while (tmp != 0x0);
 }
 
 static void exynos4x12_set_apll(unsigned int index)
@@ -184,7 +181,7 @@ int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
         if (IS_ERR(mout_apll))
                 goto err_mout_apll;
 
-        if (soc_is_exynos4212())
+        if (info->type == EXYNOS_SOC_4212)
                 apll_freq_4x12 = apll_freq_4212;
         else
                 apll_freq_4x12 = apll_freq_4412;