[PATCH v0 03/10] arm: orion5x: Add clk support for mv88f5181

Jamie Lentin
2016-07-16T14:29:01Z

Referring to values in the u-boot port, add support for the mv88f5181

Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
---
.../devicetree/bindings/clock/mvebu-core-clock.txt | 1 +
drivers/clk/mvebu/orion.c | 70 ++++++++++++++++++++++
2 files changed, 71 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt b/Documentation/devicetree/bindings/clock/mvebu-core-clock.txt
index 670c2af..eb985a6 100644
--- 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
--- a/drivers/clk/mvebu/orion.c
+++ b/drivers/clk/mvebu/orion.c
@@ -21,6 +21,76 @@ static const struct coreclk_ratio orion_coreclk_ratios[] __initconst = {
};

/*
+ * 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
*/

--
2.8.1