[PATCH 4/6] clk: mvebu: add clock support for Armada 380/385

From: Gregory CLEMENT
Date: Mon Feb 10 2014 - 12:33:23 EST

Add the clock support for the new SoCs Armada 380 and Armada 385:
core clocks and gating clocks.

Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@xxxxxxxxxxxxxxxxxx>
---
drivers/clk/mvebu/Kconfig | 4 +
drivers/clk/mvebu/Makefile | 1 +
drivers/clk/mvebu/armada-38x.c | 167 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 172 insertions(+)
create mode 100644 drivers/clk/mvebu/armada-38x.c

diff --git a/drivers/clk/mvebu/Kconfig b/drivers/clk/mvebu/Kconfig
index a54ba170634b..693f7be129f1 100644
--- a/drivers/clk/mvebu/Kconfig
+++ b/drivers/clk/mvebu/Kconfig
@@ -17,6 +17,10 @@ config ARMADA_375_CLK
bool
select MVEBU_CLK_COMMON

+config ARMADA_38X_CLK
+ bool
+ select MVEBU_CLK_COMMON
+
config ARMADA_XP_CLK
bool
select MVEBU_CLK_COMMON
diff --git a/drivers/clk/mvebu/Makefile b/drivers/clk/mvebu/Makefile
index 0b13811b9f62..4c66162fb0b4 100644
--- a/drivers/clk/mvebu/Makefile
+++ b/drivers/clk/mvebu/Makefile
@@ -4,6 +4,7 @@ obj-$(CONFIG_MVEBU_CLK_COREDIV) += clk-corediv.o

obj-$(CONFIG_ARMADA_370_CLK) += armada-370.o
obj-$(CONFIG_ARMADA_375_CLK) += armada-375.o
+obj-$(CONFIG_ARMADA_38X_CLK) += armada-38x.o
obj-$(CONFIG_ARMADA_XP_CLK) += armada-xp.o
obj-$(CONFIG_DOVE_CLK) += dove.o
obj-$(CONFIG_KIRKWOOD_CLK) += kirkwood.o
diff --git a/drivers/clk/mvebu/armada-38x.c b/drivers/clk/mvebu/armada-38x.c
new file mode 100644
index 000000000000..8bccf4ecdab6
--- /dev/null
+++ b/drivers/clk/mvebu/armada-38x.c
@@ -0,0 +1,167 @@
+/*
+ * Marvell Armada 380/385 SoC clocks
+ *
+ * Copyright (C) 2014 Marvell
+ *
+ * Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
+ * Sebastian Hesselbarth <sebastian.hesselbarth@xxxxxxxxx>
+ * Andrew Lunn <andrew@xxxxxxx>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include "common.h"
+
+/*
+ * SAR[14:10] : Ratios between PCLK0, NBCLK, HCLK and DRAM clocks
+ *
+ * SAR[15] : TCLK frequency
+ * 0 = 250 MHz
+ * 1 = 200 MHz
+ */
+
+#define SAR_A380_TCLK_FREQ_OPT 15
+#define SAR_A380_TCLK_FREQ_OPT_MASK 0x1
+#define SAR_A380_CPU_DDR_L2_FREQ_OPT 10
+#define SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
+
+static const u32 armada_38x_tclk_frequencies[] __initconst = {
+ 250000000,
+ 200000000,
+};
+
+static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)
+{
+ u8 tclk_freq_select;
+
+ tclk_freq_select = ((readl(sar) >> SAR_A380_TCLK_FREQ_OPT) &
+ SAR_A380_TCLK_FREQ_OPT_MASK);
+ return armada_38x_tclk_frequencies[tclk_freq_select];
+}
+
+static const u32 armada_38x_cpu_frequencies[] __initconst = {
+ 0, 0, 0, 0,
+ 1066 * 1000 * 1000, 0, 0, 0,
+ 1332 * 1000 * 1000, 0, 0, 0,
+ 1600 * 1000 * 1000,
+};
+
+static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)
+{
+ u8 cpu_freq_select;
+
+ cpu_freq_select = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
+ SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
+ if (cpu_freq_select >= ARRAY_SIZE(armada_38x_cpu_frequencies)) {
+ pr_err("Selected CPU frequency (%d) unsupported\n",
+ cpu_freq_select);
+ return 0;
+ }
+
+ return armada_38x_cpu_frequencies[cpu_freq_select];
+}
+
+enum { A380_CPU_TO_DDR, A380_CPU_TO_L2 };
+
+static const struct coreclk_ratio armada_38x_coreclk_ratios[] __initconst = {
+ { .id = A380_CPU_TO_L2, .name = "l2clk" },
+ { .id = A380_CPU_TO_DDR, .name = "ddrclk" },
+};
+
+static const int armada_38x_cpu_l2_ratios[32][2] __initconst = {
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {1, 2}, {0, 1}, {0, 1}, {0, 1},
+ {1, 2}, {0, 1}, {0, 1}, {0, 1},
+ {1, 2}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+};
+
+static const int armada_38x_cpu_ddr_ratios[32][2] __initconst = {
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {1, 2}, {0, 1}, {0, 1}, {0, 1},
+ {1, 2}, {0, 1}, {0, 1}, {0, 1},
+ {1, 2}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+ {0, 1}, {0, 1}, {0, 1}, {0, 1},
+};
+
+static void __init armada_38x_get_clk_ratio(
+ void __iomem *sar, int id, int *mult, int *div)
+{
+ u32 opt = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
+ SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
+
+ switch (id) {
+ case A380_CPU_TO_L2:
+ *mult = armada_38x_cpu_l2_ratios[opt][0];
+ *div = armada_38x_cpu_l2_ratios[opt][1];
+ break;
+ case A380_CPU_TO_DDR:
+ *mult = armada_38x_cpu_ddr_ratios[opt][0];
+ *div = armada_38x_cpu_ddr_ratios[opt][1];
+ break;
+ }
+}
+
+static const struct coreclk_soc_desc armada_38x_coreclks = {
+ .get_tclk_freq = armada_38x_get_tclk_freq,
+ .get_cpu_freq = armada_38x_get_cpu_freq,
+ .get_clk_ratio = armada_38x_get_clk_ratio,
+ .ratios = armada_38x_coreclk_ratios,
+ .num_ratios = ARRAY_SIZE(armada_38x_coreclk_ratios),
+};
+
+static void __init armada_38x_coreclk_init(struct device_node *np)
+{
+ mvebu_coreclk_setup(np, &armada_38x_coreclks);
+}
+CLK_OF_DECLARE(armada_38x_core_clk, "marvell,armada-380-core-clock",
+ armada_38x_coreclk_init);
+
+/*
+ * Clock Gating Control
+ */
+static const struct clk_gating_soc_desc armada_38x_gating_desc[] __initconst = {
+ { "audio", NULL, 0 },
+ { "ge2", NULL, 2 },
+ { "ge1", NULL, 3 },
+ { "ge0", NULL, 4 },
+ { "pex1", NULL, 5 },
+ { "pex2", NULL, 6 },
+ { "pex3", NULL, 7 },
+ { "pex0", NULL, 8 },
+ { "usb3h0", NULL, 9 },
+ { "usb3h1", NULL, 10 },
+ { "usb3d", NULL, 11 },
+ { "bm", NULL, 13 },
+ { "crypto0z", NULL, 14 },
+ { "sata0", NULL, 15 },
+ { "crypto1z", NULL, 16 },
+ { "sdio", NULL, 17 },
+ { "usb2", NULL, 18 },
+ { "crypto1", NULL, 21 },
+ { "xor0", NULL, 22 },
+ { "crypto0", NULL, 23 },
+ { "tdm", NULL, 25 },
+ { "xor1", NULL, 28 },
+ { "sata1", NULL, 30 },
+ { }
+};
+
+static void __init armada_38x_clk_gating_init(struct device_node *np)
+{
+ mvebu_clk_gating_setup(np, armada_38x_gating_desc);
+}
+CLK_OF_DECLARE(armada_38x_clk_gating, "marvell,armada-380-gating-clock",
+ armada_38x_clk_gating_init);
--
1.8.1.2

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