linux-kernel - [PATCH 2/4] ARM: EXYNOS: Add clk_ops for gating clocks of System MMU

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Message-id: <002201cdc245$2e05dac0$8a119040$%cho@samsung.com>
Date:	Wed, 14 Nov 2012 17:51:04 +0900
From:	Cho KyongHo <pullip.cho@...sung.com>
To:	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Cc:	'Joerg Roedel' <joro@...tes.org>,
	'Sanghyun Lee' <sanghyun75.lee@...sung.com>,
	'Kukjin Kim' <kgene.kim@...sung.com>,
	'Subash Patel' <subash.ramaswamy@...aro.org>,
	prathyush.k@...sung.com, rahul.sharma@...sung.com
Subject: [PATCH 2/4] ARM: EXYNOS: Add clk_ops for gating clocks of System MMU

Touching some System MMU needs its master devices' clock to be enabled
before. This commit adds clk_ops.set_parent of gating clocks of System
MMU to ensure gating clocks of System MMU's mater devices are enabled
when enabling gating clocks of System MMU.

Signed-off-by: KyongHo Cho <pullip.cho@...sung.com>
---
 arch/arm/mach-exynos/clock-exynos5.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm/mach-exynos/clock-exynos5.c b/arch/arm/mach-exynos/clock-exynos5.c
index 9e815ae..9dfb845 100644
--- a/arch/arm/mach-exynos/clock-exynos5.c
+++ b/arch/arm/mach-exynos/clock-exynos5.c
@@ -613,6 +613,16 @@ static struct clksrc_clk exynos5_clk_aclk_300_gscl = {
 	.reg_src = { .reg = EXYNOS5_CLKSRC_TOP3, .shift = 10, .size = 1 },
 };
 
+static int exynos5_gate_clk_set_parent(struct clk *clk, struct clk *parent)
+{
+	clk->parent = parent;
+	return 0;
+}
+
+static struct clk_ops exynos5_gate_clk_ops = {
+	.set_parent = exynos5_gate_clk_set_parent
+};
+
 static struct clk exynos5_init_clocks_off[] = {
 	{
 		.name		= "timers",
@@ -854,76 +864,91 @@ static struct clk exynos5_init_clocks_off[] = {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.0",
 		.enable		= &exynos5_clk_ip_mfc_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 1),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.1",
 		.enable		= &exynos5_clk_ip_mfc_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 2),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.2",
 		.enable		= &exynos5_clk_ip_disp1_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 9)
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.3",
 		.enable		= &exynos5_clk_ip_gen_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 7),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.4",
 		.enable		= &exynos5_clk_ip_gen_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 6)
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.5",
 		.enable		= &exynos5_clk_ip_gscl_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 7),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.6",
 		.enable		= &exynos5_clk_ip_gscl_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 8),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.7",
 		.enable		= &exynos5_clk_ip_gscl_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 9),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.8",
 		.enable		= &exynos5_clk_ip_gscl_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 10),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.9",
 		.enable		= &exynos5_clk_ip_isp0_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (0x3F << 8),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.10",
 		.enable		= &exynos5_clk_ip_isp1_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (0xF << 4),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.11",
 		.enable		= &exynos5_clk_ip_disp1_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 8)
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.12",
 		.enable		= &exynos5_clk_ip_gscl_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 11),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.13",
 		.enable		= &exynos5_clk_ip_gscl_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 12),
 	}, {
 		.name		= "sysmmu",
 		.devname	= "exynos-sysmmu.14",
 		.enable		= &exynos5_clk_ip_acp_ctrl,
+		.ops		= &exynos5_gate_clk_ops,
 		.ctrlbit	= (1 << 7)
 	}
 };
-- 
1.8.0


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