Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / clk / mvebu / orion.c

diff --git a/kernel/drivers/clk/mvebu/orion.c b/kernel/drivers/clk/mvebu/orion.c
new file mode 100644 (file)
index 0000000..fd12956
--- /dev/null
+++ b/kernel/drivers/clk/mvebu/orion.c
@@ -0,0 +1,210 @@
+/*
+ * Marvell Orion SoC clocks
+ *
+ * Copyright (C) 2014 Thomas Petazzoni
+ *
+ * Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+ *
+ * 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"
+
+static const struct coreclk_ratio orion_coreclk_ratios[] __initconst = {
+       { .id = 0, .name = "ddrclk", }
+};
+
+/*
+ * Orion 5182
+ */
+
+#define SAR_MV88F5182_TCLK_FREQ      8
+#define SAR_MV88F5182_TCLK_FREQ_MASK 0x3
+
+static u32 __init mv88f5182_get_tclk_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5182_TCLK_FREQ) &
+               SAR_MV88F5182_TCLK_FREQ_MASK;
+       if (opt == 1)
+               return 150000000;
+       else if (opt == 2)
+               return 166666667;
+       else
+               return 0;
+}
+
+#define SAR_MV88F5182_CPU_FREQ       4
+#define SAR_MV88F5182_CPU_FREQ_MASK  0xf
+
+static u32 __init mv88f5182_get_cpu_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5182_CPU_FREQ) &
+               SAR_MV88F5182_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 mv88f5182_get_clk_ratio(void __iomem *sar, int id,
+                                          int *mult, int *div)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5182_CPU_FREQ) &
+               SAR_MV88F5182_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 mv88f5182_coreclks = {
+       .get_tclk_freq = mv88f5182_get_tclk_freq,
+       .get_cpu_freq = mv88f5182_get_cpu_freq,
+       .get_clk_ratio = mv88f5182_get_clk_ratio,
+       .ratios = orion_coreclk_ratios,
+       .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
+};
+
+static void __init mv88f5182_clk_init(struct device_node *np)
+{
+       return mvebu_coreclk_setup(np, &mv88f5182_coreclks);
+}
+
+CLK_OF_DECLARE(mv88f5182_clk, "marvell,mv88f5182-core-clock", mv88f5182_clk_init);
+
+/*
+ * Orion 5281
+ */
+
+static u32 __init mv88f5281_get_tclk_freq(void __iomem *sar)
+{
+       /* On 5281, tclk is always 166 Mhz */
+       return 166666667;
+}
+
+#define SAR_MV88F5281_CPU_FREQ       4
+#define SAR_MV88F5281_CPU_FREQ_MASK  0xf
+
+static u32 __init mv88f5281_get_cpu_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5281_CPU_FREQ) &
+               SAR_MV88F5281_CPU_FREQ_MASK;
+       if (opt == 1 || opt == 2)
+               return 400000000;
+       else if (opt == 3)
+               return 500000000;
+       else
+               return 0;
+}
+
+static void __init mv88f5281_get_clk_ratio(void __iomem *sar, int id,
+                                          int *mult, int *div)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F5281_CPU_FREQ) &
+               SAR_MV88F5281_CPU_FREQ_MASK;
+       if (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 mv88f5281_coreclks = {
+       .get_tclk_freq = mv88f5281_get_tclk_freq,
+       .get_cpu_freq = mv88f5281_get_cpu_freq,
+       .get_clk_ratio = mv88f5281_get_clk_ratio,
+       .ratios = orion_coreclk_ratios,
+       .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
+};
+
+static void __init mv88f5281_clk_init(struct device_node *np)
+{
+       return mvebu_coreclk_setup(np, &mv88f5281_coreclks);
+}
+
+CLK_OF_DECLARE(mv88f5281_clk, "marvell,mv88f5281-core-clock", mv88f5281_clk_init);
+
+/*
+ * Orion 6183
+ */
+
+#define SAR_MV88F6183_TCLK_FREQ      9
+#define SAR_MV88F6183_TCLK_FREQ_MASK 0x1
+
+static u32 __init mv88f6183_get_tclk_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F6183_TCLK_FREQ) &
+               SAR_MV88F6183_TCLK_FREQ_MASK;
+       if (opt == 0)
+               return 133333333;
+       else if (opt == 1)
+               return 166666667;
+       else
+               return 0;
+}
+
+#define SAR_MV88F6183_CPU_FREQ       1
+#define SAR_MV88F6183_CPU_FREQ_MASK  0x3f
+
+static u32 __init mv88f6183_get_cpu_freq(void __iomem *sar)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F6183_CPU_FREQ) &
+               SAR_MV88F6183_CPU_FREQ_MASK;
+       if (opt == 9)
+               return 333333333;
+       else if (opt == 17)
+               return 400000000;
+       else
+               return 0;
+}
+
+static void __init mv88f6183_get_clk_ratio(void __iomem *sar, int id,
+                                          int *mult, int *div)
+{
+       u32 opt = (readl(sar) >> SAR_MV88F6183_CPU_FREQ) &
+               SAR_MV88F6183_CPU_FREQ_MASK;
+       if (opt == 9 || opt == 17) {
+               *mult = 1;
+               *div  = 2;
+       } else {
+               *mult = 0;
+               *div  = 1;
+       }
+}
+
+static const struct coreclk_soc_desc mv88f6183_coreclks = {
+       .get_tclk_freq = mv88f6183_get_tclk_freq,
+       .get_cpu_freq = mv88f6183_get_cpu_freq,
+       .get_clk_ratio = mv88f6183_get_clk_ratio,
+       .ratios = orion_coreclk_ratios,
+       .num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
+};
+
+
+static void __init mv88f6183_clk_init(struct device_node *np)
+{
+       return mvebu_coreclk_setup(np, &mv88f6183_coreclks);
+}
+
+CLK_OF_DECLARE(mv88f6183_clk, "marvell,mv88f6183-core-clock", mv88f6183_clk_init);