ARM: S5PV210: Fix clk_get_rate issue with the clk_h100 clock

The clk_h100 clock represents the IMEM clock for the MSYS domain.
This clock rate of this clock is always half of the hclk_msys clock.
There is an issue when getting the clock rate of the clk_h100 clock
(clock get_rate hclk_h100 always returns clock rate that is equal to
the hclk_msys clock rate).

This patch modifies the following.

1. Moves the definition of the clk_h100 clock into the 'init_clocks'
   list with the appropriate parent, ctrlbit, enable and ops fields.

2. The name of the clock is changed from 'clk_h100' to 'hclk_imem'
   to represent more clearly that is represents the IMEM clock in
   the MSYS domain.

3. The function to get the clock rate of the hclk_imem clock is added.

Signed-off-by: Thomas Abraham <thomas.ab@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 16 insertions, 6 deletions

diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
index 4791642f3e6e..527c9c4262f1 100644
--- a/arch/arm/mach-s5pv210/clock.c
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -155,11 +155,6 @@ static int s5pv210_clk_ip3_ctrl(struct clk *clk, int enable)
         return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
 }
 
-static struct clk clk_h100 = {
-        .name           = "hclk100",
-        .id             = -1,
-};
-
 static struct clk clk_p83 = {
         .name           = "pclk83",
         .id             = -1,
@@ -171,11 +166,19 @@ static struct clk clk_p66 = {
 };
 
 static struct clk *sys_clks[] = {
-        &clk_h100,
         &clk_p83,
         &clk_p66
 };
 
+static unsigned long s5pv210_clk_imem_get_rate(struct clk *clk)
+{
+        return clk_get_rate(clk->parent) / 2;
+}
+
+static struct clk_ops clk_hclk_imem_ops = {
+        .get_rate       = s5pv210_clk_imem_get_rate,
+};
+
 static struct clk init_clocks_disable[] = {
         {
                 .name           = "rot",
@@ -326,6 +329,13 @@ static struct clk init_clocks_disable[] = {
 
 static struct clk init_clocks[] = {
         {
+                .name           = "hclk_imem",
+                .id             = -1,
+                .parent         = &clk_hclk_msys.clk,
+                .ctrlbit        = (1 << 5),
+                .enable         = s5pv210_clk_ip0_ctrl,
+                .ops            = &clk_hclk_imem_ops,
+        }, {
                 .name           = "uart",
                 .id             = 0,
                 .parent         = &clk_p66,