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.abra...@linaro.org>
---
arch/arm/mach-exynos/clock-exynos4.c | 48 ++++++++++++++++++++++++++++-----
1 files changed, 40 insertions(+), 8 deletions(-)
diff --git a/arch/arm/mach-exynos/clock-exynos4.c
b/arch/arm/mach-exynos/clock-exynos4.c
index 57b5464..331186e 100644
--- a/arch/arm/mach-exynos/clock-exynos4.c
+++ b/arch/arm/mach-exynos/clock-exynos4.c
@@ -1243,40 +1243,70 @@ 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 = "sclk_spi_mdout",
+ .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_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),
},
+ .reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 8, .size = 8 },
+};
+
+static struct clksrc_clk exynos4_clk_mdout_spi1 = {
+ .clk = {
+ .name = "sclk_spi_mdout",
+ .devname = "exynos4210-spi.1",
+ },
.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_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_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),
},
+ .reg_div = { .reg = EXYNOS4_CLKDIV_PERIL1, .shift = 24, .size = 8 },
+};
+
+static struct clksrc_clk exynos4_clk_mdout_spi2 = {
+ .clk = {
+ .name = "sclk_spi_mdout",
+ .devname = "exynos4210-spi.2",
+ },
.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_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_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 */
@@ -1332,7 +1362,9 @@ 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[] = {
--
1.6.6.rc2
--
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