ARM: S5PV210: Add support for VPLL

This patch adds the following.

1. Adds 'clk_sclk_hdmi27m' clock to represent the HDMI 27MHz clock.
2. Adds 'clk_vpllsrc; clock of type clksrc_clk to represent the
   input clock for VPLL.
3. Adds 'clk_sclk_vpll' clock of type clksrc_clk to represent the
   output of the MUX_VPLL mux.
4. Add clk_sclk_hdmi27m, clk_vpllsrc and clk_sclk_vpll to the list
   of clocks to be registered.
5. Adds boot time print of 'clk_sclk_vpll' clock rate.
6. Adds 'clk_fout_vpll' clock to plat-s5p such that it is reusable
   on other s5p platforms.

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>

3 files changed, 70 insertions, 2 deletions

diff --git a/arch/arm/mach-s5pv210/clock.c b/arch/arm/mach-s5pv210/clock.c
index 315955da0d06..c86bff525dbe 100644
--- a/arch/arm/mach-s5pv210/clock.c
+++ b/arch/arm/mach-s5pv210/clock.c
@@ -173,6 +173,57 @@ static int s5pv210_clk_ip3_ctrl(struct clk *clk, int enable)
         return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
 }
 
+static int s5pv210_clk_mask0_ctrl(struct clk *clk, int enable)
+{
+        return s5p_gatectrl(S5P_CLK_SRC_MASK0, clk, enable);
+}
+
+static struct clk clk_sclk_hdmi27m = {
+        .name           = "sclk_hdmi27m",
+        .id             = -1,
+        .rate           = 27000000,
+};
+
+static struct clk *clkset_vpllsrc_list[] = {
+        [0] = &clk_fin_vpll,
+        [1] = &clk_sclk_hdmi27m,
+};
+
+static struct clksrc_sources clkset_vpllsrc = {
+        .sources        = clkset_vpllsrc_list,
+        .nr_sources     = ARRAY_SIZE(clkset_vpllsrc_list),
+};
+
+static struct clksrc_clk clk_vpllsrc = {
+        .clk    = {
+                .name           = "vpll_src",
+                .id             = -1,
+                .enable         = s5pv210_clk_mask0_ctrl,
+                .ctrlbit        = (1 << 7),
+        },
+        .sources        = &clkset_vpllsrc,
+        .reg_src        = { .reg = S5P_CLK_SRC1, .shift = 28, .size = 1 },
+};
+
+static struct clk *clkset_sclk_vpll_list[] = {
+        [0] = &clk_vpllsrc.clk,
+        [1] = &clk_fout_vpll,
+};
+
+static struct clksrc_sources clkset_sclk_vpll = {
+        .sources        = clkset_sclk_vpll_list,
+        .nr_sources     = ARRAY_SIZE(clkset_sclk_vpll_list),
+};
+
+static struct clksrc_clk clk_sclk_vpll = {
+        .clk    = {
+                .name           = "sclk_vpll",
+                .id             = -1,
+        },
+        .sources        = &clkset_sclk_vpll,
+        .reg_src        = { .reg = S5P_CLK_SRC0, .shift = 12, .size = 1 },
+};
+
 static unsigned long s5pv210_clk_imem_get_rate(struct clk *clk)
 {
         return clk_get_rate(clk->parent) / 2;
@@ -402,12 +453,15 @@ static struct clksrc_clk *sysclks[] = {
         &clk_pclk_msys,
         &clk_pclk_dsys,
         &clk_pclk_psys,
+        &clk_vpllsrc,
+        &clk_sclk_vpll,
 };
 
 void __init_or_cpufreq s5pv210_setup_clocks(void)
 {
         struct clk *xtal_clk;
         unsigned long xtal;
+        unsigned long vpllsrc;
         unsigned long armclk;
         unsigned long hclk_msys;
         unsigned long hclk_dsys;
@@ -418,6 +472,7 @@ void __init_or_cpufreq s5pv210_setup_clocks(void)
         unsigned long apll;
         unsigned long mpll;
         unsigned long epll;
+        unsigned long vpll;
         unsigned int ptr;
         u32 clkdiv0, clkdiv1;
 
@@ -440,13 +495,16 @@ void __init_or_cpufreq s5pv210_setup_clocks(void)
         apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508);
         mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
         epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500);
+        vpllsrc = clk_get_rate(&clk_vpllsrc.clk);
+        vpll = s5p_get_pll45xx(vpllsrc, __raw_readl(S5P_VPLL_CON), pll_4502);
 
         clk_fout_apll.rate = apll;
         clk_fout_mpll.rate = mpll;
         clk_fout_epll.rate = epll;
+        clk_fout_vpll.rate = vpll;
 
-        printk(KERN_INFO "S5PV210: PLL settings, A=%ld, M=%ld, E=%ld",
-                        apll, mpll, epll);
+        printk(KERN_INFO "S5PV210: PLL settings, A=%ld, M=%ld, E=%ld V=%ld",
+                        apll, mpll, epll, vpll);
 
         armclk = clk_get_rate(&clk_armclk.clk);
         hclk_msys = clk_get_rate(&clk_hclk_msys.clk);
@@ -470,6 +528,7 @@ void __init_or_cpufreq s5pv210_setup_clocks(void)
 }
 
 static struct clk *clks[] __initdata = {
+        &clk_sclk_hdmi27m,
 };
 
 void __init s5pv210_register_clocks(void)
diff --git a/arch/arm/plat-s5p/clock.c b/arch/arm/plat-s5p/clock.c
index aa96e335073b..4ca0759fa228 100644
--- a/arch/arm/plat-s5p/clock.c
+++ b/arch/arm/plat-s5p/clock.c
@@ -69,6 +69,13 @@ struct clk clk_fout_epll = {
         .ctrlbit        = (1 << 31),
 };
 
+/* VPLL clock output */
+struct clk clk_fout_vpll = {
+        .name           = "fout_vpll",
+        .id             = -1,
+        .ctrlbit        = (1 << 31),
+};
+
 /* ARM clock */
 struct clk clk_arm = {
         .name           = "armclk",
@@ -133,6 +140,7 @@ static struct clk *s5p_clks[] __initdata = {
         &clk_fout_apll,
         &clk_fout_mpll,
         &clk_fout_epll,
+        &clk_fout_vpll,
         &clk_arm,
         &clk_vpll,
 };
diff --git a/arch/arm/plat-s5p/include/plat/s5p-clock.h b/arch/arm/plat-s5p/include/plat/s5p-clock.h
index 56fb8b414d41..5ae8866b7989 100644
--- a/arch/arm/plat-s5p/include/plat/s5p-clock.h
+++ b/arch/arm/plat-s5p/include/plat/s5p-clock.h
@@ -27,6 +27,7 @@ extern struct clk clk_48m;
 extern struct clk clk_fout_apll;
 extern struct clk clk_fout_mpll;
 extern struct clk clk_fout_epll;
+extern struct clk clk_fout_vpll;
 extern struct clk clk_arm;
 extern struct clk clk_vpll;