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ARM: S3C24XX: cpufreq-utils: don't write raw values to MPLLCON when using ccf 

The s3c24xx cpufreq driver needs to change the mpll speed and was doing
this by writing raw values from a translation table into the MPLLCON
register.

Change this to use a regular clk_set_rate call when using the common
clock framework and only write the raw value in the samsung_clock case.

The s3c cpufreq driver does already aquire the mpll, so simply add a reference
to struct s3c_cpufreq_config to let set_fvco access it.

While struct clk is opaque the differenciation between samsung clock and
common clock is kept, as the samsung-clock mpll clk does not implement a
real set_rate.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Heiko Stuebner 2014-05-09 05:48:44 +09:00 committed by Kukjin Kim
parent 3c27f314c6
commit d8b532578f
3 changed files with 10 additions and 0 deletions
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8
arch/arm/mach-s3c24xx/cpufreq-utils.c
View File

@ -14,6 +14,7 @@
#include <linux/errno.h>
#include <linux/cpufreq.h>
#include <linux/io.h>
#include <linux/clk.h>
#include <mach/map.h>
#include <mach/regs-clock.h>
@ -60,5 +61,12 @@ void s3c2410_cpufreq_setrefresh(struct s3c_cpufreq_config *cfg)
*/
void s3c2410_set_fvco(struct s3c_cpufreq_config *cfg)
{
#ifdef CONFIG_SAMSUNG_CLOCK
__raw_writel(cfg->pll.driver_data, S3C2410_MPLLCON);
#endif
#ifdef CONFIG_COMMON_CLK
if (!IS_ERR(cfg->mpll))
clk_set_rate(cfg->mpll, cfg->pll.frequency);
#endif
}

1
arch/arm/plat-samsung/include/plat/cpu-freq-core.h
View File

@ -119,6 +119,7 @@ struct s3c_plltab {
struct s3c_cpufreq_config {
struct s3c_freq freq;
struct s3c_freq max;
struct clk *mpll;
struct cpufreq_frequency_table pll;
struct s3c_clkdivs divs;
struct s3c_cpufreq_info *info; /* for core, not drivers */

1
drivers/cpufreq/s3c24xx-cpufreq.c
View File

@ -141,6 +141,7 @@ static int s3c_cpufreq_calcdivs(struct s3c_cpufreq_config *cfg)
static void s3c_cpufreq_setfvco(struct s3c_cpufreq_config *cfg)
{
cfg->mpll = _clk_mpll;
(cfg->info->set_fvco)(cfg);
}