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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-14 14:38:28 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-14 14:38:28 -0800 |
commit | 6a57d104c8cb5b6adad6784b4ce6e2f7f9961a3a (patch) | |
tree | c3ff93b006d7483ccee09799d215b03b1bbc3f1b /arch/arm/mach-exynos/cpuidle.c | |
parent | cebfa85eb86d92bf85d3b041c6b044184517a988 (diff) | |
parent | c91321e8ff338a88a9272dcd938f085955cd5846 (diff) | |
download | linux-6a57d104c8cb5b6adad6784b4ce6e2f7f9961a3a.tar.bz2 |
Merge tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM Soc updates, take 2, from Olof Johansson:
"This is the second batch of SoC updates for the 3.8 merge window,
containing parts that had dependencies on earlier branches such that
we couldn't include them with the first branch.
These are general updates for Samsung Exynos, Renesas/shmobile and a
topic branch that adds SMP support to Altera's socfpga platform."
Fix up conflicts mostly as per Olof.
* tag 'soc2' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
ARM: EXYNOS: Clock settings for SATA and SATA PHY
ARM: EXYNOS: Add ARM down clock support
ARM: EXYNOS: Fix i2c suspend/resume for legacy controller
ARM: EXYNOS: Add aliases for i2c controller
ARM: EXYNOS: Setup legacy i2c controller interrupts
sh: clkfwk: fixup unsed variable warning
Revert "ARM: shmobile: r8a7779: Replace modify_scu_cpu_psr with scu_power_mode"
Revert "ARM: shmobile: sh73a0: Replace modify_scu_cpu_psr with scu_power_mode"
Revert "ARM: shmobile: emev2: Replace modify_scu_cpu_psr with scu_power_mode"
ARM: highbank: use common debug_ll_io_init
ARM: shmobile: sh7372: sh7372_fsiXck_clk become non-global
ARM: shmobile: sh7372: remove fsidivx clock
ARM: socfpga: mark secondary_trampoline as cpuinit
socfpga: map uart into virtual address space so that early_printk() works
ARM: socfpga: fix build break for allyesconfig
ARM: socfpga: Enable SMP for socfpga
ARM: EXYNOS: Add dp clock support for EXYNOS5
ARM: SAMSUNG: call clk_get_rate for debugfs rate files
ARM: SAMSUNG: add clock_tree debugfs file in clock
Diffstat (limited to 'arch/arm/mach-exynos/cpuidle.c')
-rw-r--r-- | arch/arm/mach-exynos/cpuidle.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/cpuidle.c b/arch/arm/mach-exynos/cpuidle.c index 8e4ec21ef2cf..050924152776 100644 --- a/arch/arm/mach-exynos/cpuidle.c +++ b/arch/arm/mach-exynos/cpuidle.c @@ -21,6 +21,7 @@ #include <asm/suspend.h> #include <asm/unified.h> #include <asm/cpuidle.h> +#include <mach/regs-clock.h> #include <mach/regs-pmu.h> #include <mach/pmu.h> @@ -157,12 +158,47 @@ static int exynos4_enter_lowpower(struct cpuidle_device *dev, return exynos4_enter_core0_aftr(dev, drv, new_index); } +static void __init exynos5_core_down_clk(void) +{ + unsigned int tmp; + + /* + * Enable arm clock down (in idle) and set arm divider + * ratios in WFI/WFE state. + */ + tmp = PWR_CTRL1_CORE2_DOWN_RATIO | \ + PWR_CTRL1_CORE1_DOWN_RATIO | \ + PWR_CTRL1_DIV2_DOWN_EN | \ + PWR_CTRL1_DIV1_DOWN_EN | \ + PWR_CTRL1_USE_CORE1_WFE | \ + PWR_CTRL1_USE_CORE0_WFE | \ + PWR_CTRL1_USE_CORE1_WFI | \ + PWR_CTRL1_USE_CORE0_WFI; + __raw_writel(tmp, EXYNOS5_PWR_CTRL1); + + /* + * Enable arm clock up (on exiting idle). Set arm divider + * ratios when not in idle along with the standby duration + * ratios. + */ + tmp = PWR_CTRL2_DIV2_UP_EN | \ + PWR_CTRL2_DIV1_UP_EN | \ + PWR_CTRL2_DUR_STANDBY2_VAL | \ + PWR_CTRL2_DUR_STANDBY1_VAL | \ + PWR_CTRL2_CORE2_UP_RATIO | \ + PWR_CTRL2_CORE1_UP_RATIO; + __raw_writel(tmp, EXYNOS5_PWR_CTRL2); +} + static int __init exynos4_init_cpuidle(void) { int i, max_cpuidle_state, cpu_id; struct cpuidle_device *device; struct cpuidle_driver *drv = &exynos4_idle_driver; + if (soc_is_exynos5250()) + exynos5_core_down_clk(); + /* Setup cpuidle driver */ drv->state_count = (sizeof(exynos4_cpuidle_set) / sizeof(struct cpuidle_state)); |