Hi Sachin, > Use common clock framework (CCF) APIs to set the clock rates > instead of direct register manipulation. This now updates the > sysfs entry (cpuinfo_cur_freq) correctly which did not reflect > the correct value until now. While at it clean up the PLL s-div > parameter setting as it is handled by the PLL driver. > > Signed-off-by: Sachin Kamat <sachin.kamat@xxxxxxxxxx> > --- > To fully test this, the following 2 patches would be necessary: > * clk: exynos5250: register APLL rate table > http://www.spinics.net/lists/arm-kernel/msg285103.html > * clk: exynos5250: Add CLK_SET_RATE_PARENT flag to mout_apll > http://permalink.gmane.org/gmane.linux.kernel.samsung-soc/24906 > --- > > drivers/cpufreq/exynos5250-cpufreq.c | 74 > +++++----------------------------- 1 file changed, 10 insertions(+), > 64 deletions(-) > > diff --git a/drivers/cpufreq/exynos5250-cpufreq.c > b/drivers/cpufreq/exynos5250-cpufreq.c index > 8feda86fe42c..86fb1a105601 100644 --- > a/drivers/cpufreq/exynos5250-cpufreq.c +++ > b/drivers/cpufreq/exynos5250-cpufreq.c @@ -102,12 +102,12 @@ static > void set_clkdiv(unsigned int div_index) cpu_relax(); > } > > -static void set_apll(unsigned int new_index, > - unsigned int old_index) > +static void set_apll(unsigned int index) > { > - unsigned int tmp, pdiv; > + unsigned int tmp; > + unsigned int freq = apll_freq_5250[index].freq; > > - /* 1. MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */ > + /* MUX_CORE_SEL = MPLL, ARMCLK uses MPLL for lock time */ > clk_set_parent(moutcore, mout_mpll); > > do { > @@ -116,24 +116,9 @@ static void set_apll(unsigned int new_index, > tmp &= 0x7; > } while (tmp != 0x2); > > - /* 2. Set APLL Lock time */ > - pdiv = ((apll_freq_5250[new_index].mps >> 8) & 0x3f); > - > - __raw_writel((pdiv * 250), EXYNOS5_APLL_LOCK); > + clk_set_rate(mout_apll, freq * 1000); > > - /* 3. Change PLL PMS values */ > - tmp = __raw_readl(EXYNOS5_APLL_CON0); > - tmp &= ~((0x3ff << 16) | (0x3f << 8) | (0x7 << 0)); > - tmp |= apll_freq_5250[new_index].mps; > - __raw_writel(tmp, EXYNOS5_APLL_CON0); > - > - /* 4. wait_lock_time */ > - do { > - cpu_relax(); > - tmp = __raw_readl(EXYNOS5_APLL_CON0); > - } while (!(tmp & (0x1 << 29))); > - > - /* 5. MUX_CORE_SEL = APLL */ > + /* MUX_CORE_SEL = APLL */ > clk_set_parent(moutcore, mout_apll); > > do { > @@ -141,55 +126,17 @@ static void set_apll(unsigned int new_index, > tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU); > tmp &= (0x7 << 16); > } while (tmp != (0x1 << 16)); > - > -} > - > -static bool exynos5250_pms_change(unsigned int old_index, unsigned > int new_index) -{ > - unsigned int old_pm = apll_freq_5250[old_index].mps >> 8; > - unsigned int new_pm = apll_freq_5250[new_index].mps >> 8; > - > - return (old_pm == new_pm) ? 0 : 1; > } > > static void exynos5250_set_frequency(unsigned int old_index, > unsigned int new_index) > { > - unsigned int tmp; > - > if (old_index > new_index) { > - if (!exynos5250_pms_change(old_index, new_index)) { > - /* 1. Change the system clock divider values > */ > - set_clkdiv(new_index); > - /* 2. Change just s value in apll m,p,s > value */ > - tmp = __raw_readl(EXYNOS5_APLL_CON0); > - tmp &= ~(0x7 << 0); > - tmp |= apll_freq_5250[new_index].mps & 0x7; > - __raw_writel(tmp, EXYNOS5_APLL_CON0); > - > - } else { > - /* Clock Configuration Procedure */ > - /* 1. Change the system clock divider values > */ > - set_clkdiv(new_index); > - /* 2. Change the apll m,p,s value */ > - set_apll(new_index, old_index); > - } > + set_clkdiv(new_index); > + set_apll(new_index); > } else if (old_index < new_index) { > - if (!exynos5250_pms_change(old_index, new_index)) { > - /* 1. Change just s value in apll m,p,s > value */ > - tmp = __raw_readl(EXYNOS5_APLL_CON0); > - tmp &= ~(0x7 << 0); > - tmp |= apll_freq_5250[new_index].mps & 0x7; > - __raw_writel(tmp, EXYNOS5_APLL_CON0); > - /* 2. Change the system clock divider values > */ > - set_clkdiv(new_index); > - } else { > - /* Clock Configuration Procedure */ > - /* 1. Change the apll m,p,s value */ > - set_apll(new_index, old_index); > - /* 2. Change the system clock divider values > */ > - set_clkdiv(new_index); > - } > + set_apll(new_index); > + set_clkdiv(new_index); > } > } > > @@ -222,7 +169,6 @@ int exynos5250_cpufreq_init(struct > exynos_dvfs_info *info) info->volt_table = exynos5250_volt_table; > info->freq_table = exynos5250_freq_table; > info->set_freq = exynos5250_set_frequency; > - info->need_apll_change = exynos5250_pms_change; > > return 0; > Looks good to me. Reviewed-by: Lukasz Majewski <l.majewski@xxxxxxxxxxx> -- -- Best regards, Lukasz Majewski Samsung R&D Institute Poland (SRPOL) | Linux Platform Group -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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