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Commit 528eae6c authored by Andrzej Hajda's avatar Andrzej Hajda Committed by Kukjin Kim
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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: default avatarAndrzej Hajda <a.hajda@samsung.com>
Reviewed-by: default avatarJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Tested-by: default avatarJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: default avatarSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene@kernel.org>
parent c517d838

arch/arm/mach-exynos/pm_domains.c

+23 −4
Original line number Diff line number Diff line
@@ -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;