From: Thomas Abraham <thomas.abraham@linaro.org>
Date: Sat, 14 Jul 2012 01:53:08 +0000 (+0900)
Subject: ARM: EXYNOS: Fix the incorrect hierarchy of spi controller bus clock
X-Git-Tag: v3.6-rc1~143^2~1^2~5
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=46fda15c0c21493a9305db0a05e08f072d6409e4;p=linux.git

ARM: EXYNOS: Fix the incorrect hierarchy of spi controller bus clock

The sclk_spi clock is derived currently from the first level divider
(MMCx_RATIO) which is incorrect. The output of the first level clock
is divided by a second level divider (MMCx_PRE_RATIO), the output of
which is used as the spi bus clock (sclk_spi). Fix the clock hierarchy
issues for the sclk_spi clock.

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Acked-by: Jaswinder Singh <jaswinder.singh@linaro.org>
[kgene.kim@samsung.com: changed the name of clk for consensus]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---

diff --git a/arch/arm/mach-exynos/clock-exynos4.c b/arch/arm/mach-exynos/clock-exynos4.c
index 10a46a9f0ea7..26fe9de35ecb 100644
--- a/arch/arm/mach-exynos/clock-exynos4.c
+++ b/arch/arm/mach-exynos/clock-exynos4.c
@@ -1242,40 +1242,67 @@ static struct clksrc_clk exynos4_clk_sclk_mmc3 = {
 	.reg_div = { .reg = EXYNOS4_CLKDIV_FSYS2, .shift = 24, .size = 8 },
 };
 
+static struct clksrc_clk exynos4_clk_mdout_spi0 = {
+	.clk	= {
+		.name		= "mdout_spi",
+		.devname	= "exynos4210-spi.0",
+	},
+	.sources = &exynos4_clkset_group,
+	.reg_src = { .reg = EXYNOS4_CLKSRC_PERIL1, .shift = 16, .size = 4 },
+	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 0, .size = 4 },
+};
+
+static struct clksrc_clk exynos4_clk_mdout_spi1 = {
+	.clk	= {
+		.name		= "mdout_spi",
+		.devname	= "exynos4210-spi.1",
+	},
+	.sources = &exynos4_clkset_group,
+	.reg_src = { .reg = EXYNOS4_CLKSRC_PERIL1, .shift = 20, .size = 4 },
+	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 16, .size = 4 },
+};
+
+static struct clksrc_clk exynos4_clk_mdout_spi2 = {
+	.clk	= {
+		.name		= "mdout_spi",
+		.devname	= "exynos4210-spi.2",
+	},
+	.sources = &exynos4_clkset_group,
+	.reg_src = { .reg = EXYNOS4_CLKSRC_PERIL1, .shift = 24, .size = 4 },
+	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL2, .shift = 0, .size = 4 },
+};
+
 static struct clksrc_clk exynos4_clk_sclk_spi0 = {
 	.clk	= {
 		.name		= "sclk_spi",
 		.devname	= "exynos4210-spi.0",
+		.parent		= &exynos4_clk_mdout_spi0.clk,
 		.enable		= exynos4_clksrc_mask_peril1_ctrl,
 		.ctrlbit	= (1 << 16),
 	},
-	.sources = &exynos4_clkset_group,
-	.reg_src = { .reg = EXYNOS4_CLKSRC_PERIL1, .shift = 16, .size = 4 },
-	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 0, .size = 4 },
+	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 8, .size = 8 },
 };
 
 static struct clksrc_clk exynos4_clk_sclk_spi1 = {
 	.clk	= {
 		.name		= "sclk_spi",
 		.devname	= "exynos4210-spi.1",
+		.parent		= &exynos4_clk_mdout_spi1.clk,
 		.enable		= exynos4_clksrc_mask_peril1_ctrl,
 		.ctrlbit	= (1 << 20),
 	},
-	.sources = &exynos4_clkset_group,
-	.reg_src = { .reg = EXYNOS4_CLKSRC_PERIL1, .shift = 20, .size = 4 },
-	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 16, .size = 4 },
+	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 24, .size = 8 },
 };
 
 static struct clksrc_clk exynos4_clk_sclk_spi2 = {
 	.clk	= {
 		.name		= "sclk_spi",
 		.devname	= "exynos4210-spi.2",
+		.parent		= &exynos4_clk_mdout_spi2.clk,
 		.enable		= exynos4_clksrc_mask_peril1_ctrl,
 		.ctrlbit	= (1 << 24),
 	},
-	.sources = &exynos4_clkset_group,
-	.reg_src = { .reg = EXYNOS4_CLKSRC_PERIL1, .shift = 24, .size = 4 },
-	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL2, .shift = 0, .size = 4 },
+	.reg_div = { .reg = EXYNOS4_CLKDIV_PERIL2, .shift = 8, .size = 8 },
 };
 
 /* Clock initialization code */
@@ -1331,7 +1358,9 @@ static struct clksrc_clk *exynos4_clksrc_cdev[] = {
 	&exynos4_clk_sclk_spi0,
 	&exynos4_clk_sclk_spi1,
 	&exynos4_clk_sclk_spi2,
-
+	&exynos4_clk_mdout_spi0,
+	&exynos4_clk_mdout_spi1,
+	&exynos4_clk_mdout_spi2,
 };
 
 static struct clk_lookup exynos4_clk_lookup[] = {