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 DT instead of
soc_is_exynosXXXX().
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
---
.../devicetree/bindings/cpufreq/cpufreq-exynos.txt | 18 ++++++++
drivers/cpufreq/Kconfig.arm | 4 +-
drivers/cpufreq/exynos-cpufreq.c | 47
+++++++++++++++++---
drivers/cpufreq/exynos-cpufreq.h | 8 ++++
drivers/cpufreq/exynos4x12-cpufreq.c | 11 ++---
5 files changed, 72 insertions(+), 16 deletions(-)
create mode 100644
Documentation/devicetree/bindings/cpufreq/cpufreq-exynos.txt
diff --git a/Documentation/devicetree/bindings/cpufreq/cpufreq-exynos.txt
b/Documentation/devicetree/bindings/cpufreq/cpufreq-exynos.txt
new file mode 100644
index 0000000..f5e8ac6
--- /dev/null
+++ b/Documentation/devicetree/bindings/cpufreq/cpufreq-exynos.txt
@@ -0,0 +1,18 @@
+
+Exynos cpufreq driver
+-------------------
+
+Exynos4210/4212/4412/5250 SoC cpufreq driver for CPU frequency scaling.
+
+Required properties:
+ - compatible: value should be either of the following.
+ (a) "samsung, exynos4210-cpufreq", for Exynos4210.
+ (b) "samsung, exynos4212-cpufreq", for Exynos4212.
+ (c) "samsung, exynos4412-cpufreq", for Exynos4412.
+ (d) "samsung, exynos5250-cpufreq", for Exynos5250.
+
+Example:
+--------
+ cpufreq@10030000 {
+ compatible = "samsung,exynos4210-cpufreq";
+ };
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 5805035..9606f90 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -27,6 +27,8 @@ config ARM_VEXPRESS_SPC_CPUFREQ
config ARM_EXYNOS_CPUFREQ
bool
+ depends on HAVE_CLK && OF
+ select PM_OPP
config ARM_EXYNOS4210_CPUFREQ
bool "SAMSUNG EXYNOS4210"
@@ -64,8 +66,6 @@ config ARM_EXYNOS5250_CPUFREQ
config ARM_EXYNOS5440_CPUFREQ
bool "SAMSUNG EXYNOS5440"
depends on SOC_EXYNOS5440
- depends on HAVE_CLK && OF
- select PM_OPP
default y
help
This adds the CPUFreq driver for Samsung EXYNOS5440
diff --git a/drivers/cpufreq/exynos-cpufreq.c
b/drivers/cpufreq/exynos-cpufreq.c
index f99cfe2..cfc8c75 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -16,7 +16,10 @@
#include <linux/slab.h>
#include <linux/regulator/consumer.h>
#include <linux/cpufreq.h>
+#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/pm_opp.h>
+#include <linux/of_device.h>
#include <plat/cpu.h>
@@ -155,19 +158,44 @@ static struct cpufreq_driver exynos_driver = {
#endif
};
+static const struct of_device_id exynos_cpufreq_match[] = {
+ { .compatible = "samsung,exynos4210-cpufreq", .data =
(void*)EXYNOS_SOC_4210 },
+ { .compatible = "samsung,exynos4212-cpufreq", .data =
(void*)EXYNOS_SOC_4212 },
+ { .compatible = "samsung,exynos4412-cpufreq", .data =
(void*)EXYNOS_SOC_4412 },
+ { .compatible = "samsung,exynos5250-cpufreq", .data =
(void*)EXYNOS_SOC_5250 },
+ {},
+};
+MODULE_DEVICE_TABLE(of, exynos_cpufreq_match);
+
static int exynos_cpufreq_probe(struct platform_device *pdev)
{
int ret = -EINVAL;
+ struct device_node *np;
+ const struct of_device_id *match;
+
+ np = pdev->dev.of_node;
+ if (!np)
+ return -ENODEV;
+
+ match = of_match_device(exynos_cpufreq_match, &pdev->dev);
+ if (!match) {
+ pr_err("%s: Unknown device mode\n", __func__);
+ goto err_put_node;
+ }
exynos_info = kzalloc(sizeof(*exynos_info), GFP_KERNEL);
- if (!exynos_info)
- return -ENOMEM;
+ if (!exynos_info) {
+ ret = -ENOMEM;
+ goto err_put_node;
+ }
+
+ exynos_info->type = (long)match->data;
- if (soc_is_exynos4210())
+ if (exynos_info->type == EXYNOS_SOC_4210)
ret = exynos4210_cpufreq_init(exynos_info);
- else if (soc_is_exynos4212() || soc_is_exynos4412())
+ else if (exynos_info->type == EXYNOS_SOC_4212 || exynos_info->type
== EXYNOS_SOC_4412)
ret = exynos4x12_cpufreq_init(exynos_info);
- else if (soc_is_exynos5250())
+ else if (exynos_info->type == EXYNOS_SOC_5250)
ret = exynos5250_cpufreq_init(exynos_info);
else
return 0;
@@ -189,20 +217,25 @@ static int exynos_cpufreq_probe(struct platform_device
*pdev)
/* Done here as we want to capture boot frequency */
locking_frequency = clk_get_rate(exynos_info->cpu_clk) / 1000;
- if (!cpufreq_register_driver(&exynos_driver))
+ if (!cpufreq_register_driver(&exynos_driver)) {
+ of_node_put(np);
return 0;
+ }
pr_err("%s: failed to register cpufreq driver\n", __func__);
regulator_put(arm_regulator);
err_vdd_arm:
kfree(exynos_info);
- return -EINVAL;
+err_put_node:
+ of_node_put(np);
+ return ret;
}
static struct platform_driver exynos_cpufreq_platdrv = {
.driver = {
.name = "exynos-cpufreq",
.owner = THIS_MODULE,
+ .of_match_table = exynos_cpufreq_match,
},
.probe = exynos_cpufreq_probe,
};
diff --git a/drivers/cpufreq/exynos-cpufreq.h
b/drivers/cpufreq/exynos-cpufreq.h
index 3ddade8..f189547 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 466c76a..63a3907 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;
--
1.7.10.4
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