Hi Vikas,
On 17.03.2014 14:09, Vikas Sajjan wrote:
Adds PMU support of PMU for Exynos5260. Suspend-to-RAM can be built on
top this.
Signed-off-by: Pankaj Dubey <[email protected]>
Signed-off-by: Vikas Sajjan <[email protected]>
---
arch/arm/mach-exynos/common.h | 26 ++++
arch/arm/mach-exynos/pm.c | 34 +++--
arch/arm/mach-exynos/pmu.c | 238 ++++++++++++++++++++++++++++++
arch/arm/mach-exynos/regs-pmu.h | 232 +++++++++++++++++++++++++++++
arch/arm/plat-samsung/include/plat/cpu.h | 8 +
5 files changed, 529 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index aba6a2a..a17f701 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -56,6 +56,32 @@ enum sys_powerdown {
NUM_SYS_POWERDOWN,
};
+enum running_cpu {
+ EXYNOS5_KFC,
+ EXYNOS5_ARM,
+};
+
+enum reg_op {
+ REG_INIT, /* write new value */
+ REG_RESET, /* clear with zero */
+ REG_SET, /* bit set */
+ REG_CLEAR, /* bit clear */
+};
+
+/* reg/value set */
+#define EXYNOS_PMU_REG(REG, VAL, OP) \
+{ \
+ .reg = (void __iomem *)REG, \
+ .val = VAL, \
+ .op = OP, \
+}
+
+struct exynos_pmu_init_reg {
+ void __iomem *reg;
+ unsigned int val;
+ enum reg_op op;
+};
+
extern unsigned long l2x0_regs_phys;
struct exynos_pmu_conf {
void __iomem *reg;
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index 15af0ce..dbe9670 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -109,7 +109,7 @@ static int exynos_cpu_suspend(unsigned long arg)
outer_flush_all();
#endif
- if (soc_is_exynos5250())
+ if (soc_is_exynos5250() || soc_is_exynos5260())
flush_cache_all();
I think it's the right time for this code to be restructured. Adding
more and more SoCs over this cruft is making this code worse and worse.
I believe this should be done as follows:
- a generic struct describing particular PMU variant should be
defined, with things like
bool flush_cache_on_suspend;
struct exynos_pmu_conf *pmu_conf;
or even function pointers, like
void (*cpu_suspend)(unsigned long arg);
to handle things done currently using soc_is_*() macros, which we should
get rid of.
- a DT match table would bind particular compatible strings with
respective PMU variants structs,
- in general, this code should be made more like a normal driver, e.g.
bind to a DT node and map registers dynamically.
Best regards,
Tomasz
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