diff options
Diffstat (limited to 'drivers/cpufreq/exynos5250-cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/exynos5250-cpufreq.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/drivers/cpufreq/exynos5250-cpufreq.c b/drivers/cpufreq/exynos5250-cpufreq.c index 363a0b3fe1b..c91ce69dc63 100644 --- a/drivers/cpufreq/exynos5250-cpufreq.c +++ b/drivers/cpufreq/exynos5250-cpufreq.c @@ -16,8 +16,8 @@ #include <linux/io.h> #include <linux/slab.h> #include <linux/cpufreq.h> - -#include <mach/map.h> +#include <linux/of.h> +#include <linux/of_address.h> #include "exynos-cpufreq.h" @@ -25,6 +25,7 @@ static struct clk *cpu_clk; static struct clk *moutcore; static struct clk *mout_mpll; static struct clk *mout_apll; +static struct exynos_dvfs_info *cpufreq; static unsigned int exynos5250_volt_table[] = { 1300000, 1250000, 1225000, 1200000, 1150000, @@ -87,17 +88,18 @@ static void set_clkdiv(unsigned int div_index) tmp = apll_freq_5250[div_index].clk_div_cpu0; - __raw_writel(tmp, EXYNOS5_CLKDIV_CPU0); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS5_CLKDIV_CPU0); - while (__raw_readl(EXYNOS5_CLKDIV_STATCPU0) & 0x11111111) + while (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKDIV_STATCPU0) + & 0x11111111) cpu_relax(); /* Change Divider - CPU1 */ tmp = apll_freq_5250[div_index].clk_div_cpu1; - __raw_writel(tmp, EXYNOS5_CLKDIV_CPU1); + __raw_writel(tmp, cpufreq->cmu_regs + EXYNOS5_CLKDIV_CPU1); - while (__raw_readl(EXYNOS5_CLKDIV_STATCPU1) & 0x11) + while (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKDIV_STATCPU1) & 0x11) cpu_relax(); } @@ -111,7 +113,8 @@ static void set_apll(unsigned int index) do { cpu_relax(); - tmp = (__raw_readl(EXYNOS5_CLKMUX_STATCPU) >> 16); + tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKMUX_STATCPU) + >> 16); tmp &= 0x7; } while (tmp != 0x2); @@ -122,7 +125,7 @@ static void set_apll(unsigned int index) do { cpu_relax(); - tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU); + tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKMUX_STATCPU); tmp &= (0x7 << 16); } while (tmp != (0x1 << 16)); } @@ -141,8 +144,30 @@ static void exynos5250_set_frequency(unsigned int old_index, int exynos5250_cpufreq_init(struct exynos_dvfs_info *info) { + struct device_node *np; unsigned long rate; + /* + * HACK: This is a temporary workaround to get access to clock + * controller registers directly and remove static mappings and + * dependencies on platform headers. It is necessary to enable + * Exynos multi-platform support and will be removed together with + * this whole driver as soon as Exynos gets migrated to use + * cpufreq-cpu0 driver. + */ + np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-clock"); + if (!np) { + pr_err("%s: failed to find clock controller DT node\n", + __func__); + return -ENODEV; + } + + info->cmu_regs = of_iomap(np, 0); + if (!info->cmu_regs) { + pr_err("%s: failed to map CMU registers\n", __func__); + return -EFAULT; + } + cpu_clk = clk_get(NULL, "armclk"); if (IS_ERR(cpu_clk)) return PTR_ERR(cpu_clk); @@ -169,6 +194,8 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info) info->freq_table = exynos5250_freq_table; info->set_freq = exynos5250_set_frequency; + cpufreq = info; + return 0; err_mout_apll: |