diff options
| author | Andrzej Hajda <a.hajda@samsung.com> | 2015-03-18 02:12:23 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene@kernel.org> | 2015-03-18 02:12:23 +0900 |
| commit | 528eae6c14a45f40809733862675f6cf03998d17 (patch) | |
| tree | ff77c0078d4c0f095eb38e50df3562a566f2a84e /arch/arm/mach-exynos | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
| download | linux-528eae6c14a45f40809733862675f6cf03998d17.tar.bz2 | |
ARM: EXYNOS: add support for async-bridge clocks for pm_domains
Since Exynos5420 there are async-bridges (ASB) between different IPs. These
bridges must be operational during power domain on/off, ie. clocks used
by these bridges should be enabled.
This patch enabled these clocks during domain on/off.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
Diffstat (limited to 'arch/arm/mach-exynos')
| -rw-r--r-- | arch/arm/mach-exynos/pm_domains.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c index 20f267121b3e..ccdcacbd1cd9 100644 --- a/arch/arm/mach-exynos/pm_domains.c +++ b/arch/arm/mach-exynos/pm_domains.c @@ -37,6 +37,7 @@ struct exynos_pm_domain { struct clk *oscclk; struct clk *clk[MAX_CLK_PER_DOMAIN]; struct clk *pclk[MAX_CLK_PER_DOMAIN]; + struct clk *asb_clk[MAX_CLK_PER_DOMAIN]; }; static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on) @@ -45,14 +46,19 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on) void __iomem *base; u32 timeout, pwr; char *op; + int i; pd = container_of(domain, struct exynos_pm_domain, pd); base = pd->base; + for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { + if (IS_ERR(pd->asb_clk[i])) + break; + clk_prepare_enable(pd->asb_clk[i]); + } + /* Set oscclk before powering off a domain*/ if (!power_on) { - int i; - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { if (IS_ERR(pd->clk[i])) break; @@ -81,8 +87,6 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on) /* Restore clocks after powering on a domain*/ if (power_on) { - int i; - for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { if (IS_ERR(pd->clk[i])) break; @@ -92,6 +96,12 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on) } } + for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { + if (IS_ERR(pd->asb_clk[i])) + break; + clk_disable_unprepare(pd->asb_clk[i]); + } + return 0; } @@ -131,6 +141,15 @@ static __init int exynos4_pm_init_power_domain(void) pd->pd.power_off = exynos_pd_power_off; pd->pd.power_on = exynos_pd_power_on; + for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) { + char clk_name[8]; + + snprintf(clk_name, sizeof(clk_name), "asb%d", i); + pd->asb_clk[i] = clk_get(dev, clk_name); + if (IS_ERR(pd->asb_clk[i])) + break; + } + pd->oscclk = clk_get(dev, "oscclk"); if (IS_ERR(pd->oscclk)) goto no_clk; |