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authorNishanth Menon <nm@ti.com>2014-06-06 10:04:20 +0400
committerNishanth Menon <nm@ti.com>2014-09-08 20:22:41 +0400
commitbd002d7bdafc695decf7d4aeba285097356938f1 (patch)
treea9a5b81e89b4ae351d52d2f87fbc995233e90674 /arch/arm/mach-omap2/powerdomain.h
parent13bbffd4ebca57dfae59a3f13ff98dc417f89b23 (diff)
downloadlinux-bd002d7bdafc695decf7d4aeba285097356938f1.tar.xz
ARM: OMAP2+: powerdomain: introduce logic for finding valid power domain
powerdomain configuration in OMAP is done using PWRSTCTRL register for each power domain. However, PRCM lets us write any value we'd like to the logic and power domain target states, however the SoC integration tends to actually function only at a few discrete states. These valid states are already in our powerdomains_xxx_data.c file. So, provide a function to easily query valid low power state that the power domain is allowed to go to. Based on work originally done by Jean Pihet <j-pihet@ti.com> https://patchwork.kernel.org/patch/1325091/ . There is no attempt to create a new powerdomain solution here, except fixing issues seen attempting invalid programming attempts. Future consolidation to the generic powerdomain framework should consider this requirement as well. Similar solutions have been done in product kernels in the past such as: https://android.googlesource.com/kernel/omap.git/+blame/android-omap-panda-3.0/arch/arm/mach-omap2/pm44xx.c Signed-off-by: Nishanth Menon <nm@ti.com> Reviewed-by: Kevin Hilman <khilman@linaro.org> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'arch/arm/mach-omap2/powerdomain.h')
-rw-r--r--arch/arm/mach-omap2/powerdomain.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h
index a754c828aa51..11bd4dd7d8d6 100644
--- a/arch/arm/mach-omap2/powerdomain.h
+++ b/arch/arm/mach-omap2/powerdomain.h
@@ -220,6 +220,9 @@ struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm);
int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);
+u8 pwrdm_get_valid_lp_state(struct powerdomain *pwrdm,
+ bool is_logic_state, u8 req_state);
+
int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
int pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
int pwrdm_read_pwrst(struct powerdomain *pwrdm);