ARM: shmobile: r8a73a4: add Z2 clock support

The Z2 clock on r8a73a4 is used to clock the 4 Cortex A7 cores on the SoC.
Add a definition for this clock to later use it from the arm_big_little
CPUFreq driver.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm/mach-shmobile/clock-r8a73a4.c b/arch/arm/mach-shmobile/clock-r8a73a4.c
index 22f10ff..27ff58c 100644 (file)
--- a/arch/arm/mach-shmobile/clock-r8a73a4.c
+++ b/arch/arm/mach-shmobile/clock-r8a73a4.c
@@ -323,6 +323,21 @@ static struct clk z_clk = {
        .ops = &zclk_ops,
 };
 
+/*
+ * It seems only 1/2 divider is usable in manual mode. 1/2 / 2/3
+ * switching is only available in auto-DVFS mode
+ */
+SH_FIXED_RATIO_CLK(pll0_div2_clk,      pll0_clk,               div2);
+
+static struct clk z2_clk = {
+       .parent = &pll0_div2_clk,
+       .div_mask = 0x1f,
+       .enable_bit = 0,
+       /* We'll need to access FRQCRB and FRQCRC */
+       .enable_reg = (void __iomem *)FRQCRB,
+       .ops = &zclk_ops,
+};
+
 static struct clk *main_clks[] = {
        &extalr_clk,
        &extal1_clk,
@@ -341,6 +356,8 @@ static struct clk *main_clks[] = {
        &pll2s_clk,
        &pll2h_clk,
        &z_clk,
+       &pll0_div2_clk,
+       &z2_clk,
 };
 
 /* DIV4 */