[PATCH 2/8] arm: orion5x: Add clk support for mv88f5181
From: Jamie Lentin <hidden>
Date: 2016-08-26 09:20:58
Also in:
linux-devicetree
Subsystem:
arm/marvell kirkwood and armada 370, 375, 38x, 39x, xp, 3700, 7k/8k, cn9130 soc support, common clk framework, open firmware and flattened device tree bindings, the rest · Maintainers:
Andrew Lunn, Gregory Clement, Sebastian Hesselbarth, Stephen Boyd, Brian Masney, Jerome Brunet, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Possibly related (same subject, not in this thread)
- 2016-08-26 · Re: [PATCH 2/8] arm: orion5x: Add clk support for mv88f5181 · Andrew Lunn <andrew@lunn.ch>
- 2016-08-26 · Re: [PATCH 2/8] arm: orion5x: Add clk support for mv88f5181 · Jamie Lentin <hidden>
- 2016-08-26 · Re: [PATCH 2/8] arm: orion5x: Add clk support for mv88f5181 · LABBE Corentin <hidden>
Referring to the u-boot sources for the Netgear WNR854T, add support for the mv88f5181. Signed-off-by: Jamie Lentin <redacted> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Acked-by: Rob Herring <robh@kernel.org> --- .../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 */
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2.8.1