clk: mvebu: Add clk support for the orion5x SoC mv88f5181

Referring to the u-boot sources for the Netgear WNR854T, add support
for the mv88f5181.

[gregory.clement@free-electrons.com: fix commit title]
Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

diff --git a/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
index 670c2af..eb985a6 100644 (file)
--- a/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
+++ b/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
@@ -52,6 +52,7 @@ Required properties:
        "marvell,dove-core-clock" - for Dove SoC core clocks
        "marvell,kirkwood-core-clock" - for Kirkwood SoC (except mv88f6180)
        "marvell,mv88f6180-core-clock" - for Kirkwood MV88f6180 SoC
+       "marvell,mv88f5181-core-clock" - for Orion MV88F5181 SoC
        "marvell,mv88f5182-core-clock" - for Orion MV88F5182 SoC
        "marvell,mv88f5281-core-clock" - for Orion MV88F5281 SoC
        "marvell,mv88f6183-core-clock" - for Orion MV88F6183 SoC

diff --git a/drivers/clk/mvebu/orion.c b/drivers/clk/mvebu/orion.c
index fd12956..a6e5bee 100644 (file)
--- a/drivers/clk/mvebu/orion.c
+++ b/drivers/clk/mvebu/orion.c
@@ -20,6 +20,76 @@ static const struct coreclk_ratio orion_coreclk_ratios[] __initconst = {
        { .id = 0, .name = "ddrclk", }
 };
 
+/*
+ * Orion 5181
+ */
+
+#define SAR_MV88F5181_TCLK_FREQ      8
+#define SAR_MV88F5181_TCLK_FREQ_MASK 0x3
+
+static u32 __init mv88f5181_get_tclk_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5181_TCLK_FREQ) &
+               SAR_MV88F5181_TCLK_FREQ_MASK;
+       if (opt == 0)
+               return 133333333;
+       else if (opt == 1)
+               return 150000000;
+       else if (opt == 2)
+               return 166666667;
+       else
+               return 0;
+}
+
+#define SAR_MV88F5181_CPU_FREQ       4
+#define SAR_MV88F5181_CPU_FREQ_MASK  0xf
+
+static u32 __init mv88f5181_get_cpu_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5181_CPU_FREQ) &
+               SAR_MV88F5181_CPU_FREQ_MASK;
+       if (opt == 0)
+               return 333333333;
+       else if (opt == 1 || opt == 2)
+               return 400000000;
+       else if (opt == 3)
+               return 500000000;
+       else
+               return 0;
+}
+
+static void __init mv88f5181_get_clk_ratio(void __iomem *sar, int id,
+                                          int *mult, int *div)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5181_CPU_FREQ) &
+               SAR_MV88F5181_CPU_FREQ_MASK;
+       if (opt == 0 || opt == 1) {
+               *mult = 1;
+               *div  = 2;
+       } else if (opt == 2 || opt == 3) {
+               *mult = 1;
+               *div  = 3;
+       } else {
+               *mult = 0;
+               *div  = 1;
+       }
+}
+
+static const struct coreclk_soc_desc mv88f5181_coreclks = {
+       .get_tclk_freq = mv88f5181_get_tclk_freq,
+       .get_cpu_freq = mv88f5181_get_cpu_freq,
+       .get_clk_ratio = mv88f5181_get_clk_ratio,
+       .ratios = orion_coreclk_ratios,
+       .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
+};
+
+static void __init mv88f5181_clk_init(struct device_node *np)
+{
+       return mvebu_coreclk_setup(np, &mv88f5181_coreclks);
+}
+
+CLK_OF_DECLARE(mv88f5181_clk, "marvell,mv88f5181-core-clock", mv88f5181_clk_init);
+
 /*
  * Orion 5182
  */