clk: spear3xx: Set proper clock parent of uart1/2

The uarts only work when the parent is ras_ahb_clk. The stale 3.5
based ST tree does this in the board file.

Add it to the clk init function. Not pretty, but the mess there is
amazing anyway.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

diff --git a/drivers/clk/spear/spear3xx_clock.c b/drivers/clk/spear/spear3xx_clock.c
index 125eba86c84486ffcf08abebe72c7d4b85a850a1..bb5f387774e2ce364b0e660c5d22271282b77084 100644 (file)
--- a/drivers/clk/spear/spear3xx_clock.c
+++ b/drivers/clk/spear/spear3xx_clock.c
@@ -245,7 +245,8 @@ static const char *smii0_parents[] = { "smii_125m_pad", "ras_pll2_clk",
        "ras_syn0_gclk", };
 static const char *uartx_parents[] = { "ras_syn1_gclk", "ras_apb_clk", };
 
-static void __init spear320_clk_init(void __iomem *soc_config_base)
+static void __init spear320_clk_init(void __iomem *soc_config_base,
+                                    struct clk *ras_apb_clk)
 {
        struct clk *clk;
 
@@ -342,6 +343,8 @@ static void __init spear320_clk_init(void __iomem *soc_config_base)
                        SPEAR320_CONTROL_REG, UART1_PCLK_SHIFT, UART1_PCLK_MASK,
                        0, &_lock);
        clk_register_clkdev(clk, NULL, "a3000000.serial");
+       /* Enforce ras_apb_clk */
+       clk_set_parent(clk, ras_apb_clk);
 
        clk = clk_register_mux(NULL, "uart2_clk", uartx_parents,
                        ARRAY_SIZE(uartx_parents),
@@ -349,6 +352,8 @@ static void __init spear320_clk_init(void __iomem *soc_config_base)
                        SPEAR320_EXT_CTRL_REG, SPEAR320_UART2_PCLK_SHIFT,
                        SPEAR320_UARTX_PCLK_MASK, 0, &_lock);
        clk_register_clkdev(clk, NULL, "a4000000.serial");
+       /* Enforce ras_apb_clk */
+       clk_set_parent(clk, ras_apb_clk);
 
        clk = clk_register_mux(NULL, "uart3_clk", uartx_parents,
                        ARRAY_SIZE(uartx_parents),
@@ -379,12 +384,12 @@ static void __init spear320_clk_init(void __iomem *soc_config_base)
        clk_register_clkdev(clk, NULL, "60100000.serial");
 }
 #else
-static inline void spear320_clk_init(void __iomem *soc_config_base) { }
+static inline void spear320_clk_init(void __iomem *sb, struct clk *rc) { }
 #endif
 
 void __init spear3xx_clk_init(void __iomem *misc_base, void __iomem *soc_config_base)
 {
-       struct clk *clk, *clk1;
+       struct clk *clk, *clk1, *ras_apb_clk;
 
        clk = clk_register_fixed_rate(NULL, "osc_32k_clk", NULL, CLK_IS_ROOT,
                        32000);
@@ -613,6 +618,7 @@ void __init spear3xx_clk_init(void __iomem *misc_base, void __iomem *soc_config_
        clk = clk_register_gate(NULL, "ras_apb_clk", "apb_clk", 0, RAS_CLK_ENB,
                        RAS_APB_CLK_ENB, 0, &_lock);
        clk_register_clkdev(clk, "ras_apb_clk", NULL);
+       ras_apb_clk = clk;
 
        clk = clk_register_gate(NULL, "ras_32k_clk", "osc_32k_clk", 0,
                        RAS_CLK_ENB, RAS_32K_CLK_ENB, 0, &_lock);
@@ -659,5 +665,5 @@ void __init spear3xx_clk_init(void __iomem *misc_base, void __iomem *soc_config_
        else if (of_machine_is_compatible("st,spear310"))
                spear310_clk_init();
        else if (of_machine_is_compatible("st,spear320"))
-               spear320_clk_init(soc_config_base);
+               spear320_clk_init(soc_config_base, ras_apb_clk);
 }