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-rw-r--r--drivers/clk/mvebu/Kconfig4
-rw-r--r--drivers/clk/mvebu/Makefile1
-rw-r--r--drivers/clk/mvebu/armada-39x.c156
-rw-r--r--drivers/clk/mvebu/common.c17
-rw-r--r--drivers/clk/mvebu/common.h1
5 files changed, 179 insertions, 0 deletions
diff --git a/drivers/clk/mvebu/Kconfig b/drivers/clk/mvebu/Kconfig
index 3b34dba9178d..27696255486d 100644
--- a/drivers/clk/mvebu/Kconfig
+++ b/drivers/clk/mvebu/Kconfig
@@ -21,6 +21,10 @@ config ARMADA_38X_CLK
bool
select MVEBU_CLK_COMMON
+config ARMADA_39X_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 a9a56fc01901..645ac7ea3565 100644
--- a/drivers/clk/mvebu/Makefile
+++ b/drivers/clk/mvebu/Makefile
@@ -5,6 +5,7 @@ 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-$(CONFIG_ARMADA_39X_CLK) += armada-39x.o
obj-$(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-39x.c b/drivers/clk/mvebu/armada-39x.c
new file mode 100644
index 000000000000..efb974df9822
--- /dev/null
+++ b/drivers/clk/mvebu/armada-39x.c
@@ -0,0 +1,156 @@
+/*
+ * Marvell Armada 39x SoC clocks
+ *
+ * Copyright (C) 2015 Marvell
+ *
+ * Gregory CLEMENT <gregory.clement@free-electrons.com>
+ * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
+ * Andrew Lunn <andrew@lunn.ch>
+ * 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"
+
+/*
+ * SARL[14:10] : Ratios between CPU, NBCLK, HCLK and DCLK.
+ *
+ * SARL[15] : TCLK frequency
+ * 0 = 250 MHz
+ * 1 = 200 MHz
+ *
+ * SARH[0] : Reference clock frequency
+ * 0 = 25 Mhz
+ * 1 = 40 Mhz
+ */
+
+#define SARL 0
+#define SARL_A390_TCLK_FREQ_OPT 15
+#define SARL_A390_TCLK_FREQ_OPT_MASK 0x1
+#define SARL_A390_CPU_DDR_L2_FREQ_OPT 10
+#define SARL_A390_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
+#define SARH 4
+#define SARH_A390_REFCLK_FREQ BIT(0)
+
+static const u32 armada_39x_tclk_frequencies[] __initconst = {
+ 250000000,
+ 200000000,
+};
+
+static u32 __init armada_39x_get_tclk_freq(void __iomem *sar)
+{
+ u8 tclk_freq_select;
+
+ tclk_freq_select = ((readl(sar + SARL) >> SARL_A390_TCLK_FREQ_OPT) &
+ SARL_A390_TCLK_FREQ_OPT_MASK);
+ return armada_39x_tclk_frequencies[tclk_freq_select];
+}
+
+static const u32 armada_39x_cpu_frequencies[] __initconst = {
+ [0x0] = 666 * 1000 * 1000,
+ [0x2] = 800 * 1000 * 1000,
+ [0x3] = 800 * 1000 * 1000,
+ [0x4] = 1066 * 1000 * 1000,
+ [0x5] = 1066 * 1000 * 1000,
+ [0x6] = 1200 * 1000 * 1000,
+ [0x8] = 1332 * 1000 * 1000,
+ [0xB] = 1600 * 1000 * 1000,
+ [0xC] = 1600 * 1000 * 1000,
+ [0x12] = 1800 * 1000 * 1000,
+ [0x1E] = 1800 * 1000 * 1000,
+};
+
+static u32 __init armada_39x_get_cpu_freq(void __iomem *sar)
+{
+ u8 cpu_freq_select;
+
+ cpu_freq_select = ((readl(sar + SARL) >> SARL_A390_CPU_DDR_L2_FREQ_OPT) &
+ SARL_A390_CPU_DDR_L2_FREQ_OPT_MASK);
+ if (cpu_freq_select >= ARRAY_SIZE(armada_39x_cpu_frequencies)) {
+ pr_err("Selected CPU frequency (%d) unsupported\n",
+ cpu_freq_select);
+ return 0;
+ }
+
+ return armada_39x_cpu_frequencies[cpu_freq_select];
+}
+
+enum { A390_CPU_TO_NBCLK, A390_CPU_TO_HCLK, A390_CPU_TO_DCLK };
+
+static const struct coreclk_ratio armada_39x_coreclk_ratios[] __initconst = {
+ { .id = A390_CPU_TO_NBCLK, .name = "nbclk" },
+ { .id = A390_CPU_TO_HCLK, .name = "hclk" },
+ { .id = A390_CPU_TO_DCLK, .name = "dclk" },
+};
+
+static void __init armada_39x_get_clk_ratio(
+ void __iomem *sar, int id, int *mult, int *div)
+{
+ switch (id) {
+ case A390_CPU_TO_NBCLK:
+ *mult = 1;
+ *div = 2;
+ break;
+ case A390_CPU_TO_HCLK:
+ *mult = 1;
+ *div = 4;
+ break;
+ case A390_CPU_TO_DCLK:
+ *mult = 1;
+ *div = 2;
+ break;
+ }
+}
+
+static u32 __init armada_39x_refclk_ratio(void __iomem *sar)
+{
+ if (readl(sar + SARH) & SARH_A390_REFCLK_FREQ)
+ return 40 * 1000 * 1000;
+ else
+ return 25 * 1000 * 1000;
+}
+
+static const struct coreclk_soc_desc armada_39x_coreclks = {
+ .get_tclk_freq = armada_39x_get_tclk_freq,
+ .get_cpu_freq = armada_39x_get_cpu_freq,
+ .get_clk_ratio = armada_39x_get_clk_ratio,
+ .get_refclk_freq = armada_39x_refclk_ratio,
+ .ratios = armada_39x_coreclk_ratios,
+ .num_ratios = ARRAY_SIZE(armada_39x_coreclk_ratios),
+};
+
+static void __init armada_39x_coreclk_init(struct device_node *np)
+{
+ mvebu_coreclk_setup(np, &armada_39x_coreclks);
+}
+CLK_OF_DECLARE(armada_39x_core_clk, "marvell,armada-390-core-clock",
+ armada_39x_coreclk_init);
+
+/*
+ * Clock Gating Control
+ */
+static const struct clk_gating_soc_desc armada_39x_gating_desc[] __initconst = {
+ { "pex1", NULL, 5 },
+ { "pex2", NULL, 6 },
+ { "pex3", NULL, 7 },
+ { "pex0", NULL, 8 },
+ { "usb3h0", NULL, 9 },
+ { "sdio", NULL, 17 },
+ { "xor0", NULL, 22 },
+ { "xor1", NULL, 28 },
+ { }
+};
+
+static void __init armada_39x_clk_gating_init(struct device_node *np)
+{
+ mvebu_clk_gating_setup(np, armada_39x_gating_desc);
+}
+CLK_OF_DECLARE(armada_39x_clk_gating, "marvell,armada-390-gating-clock",
+ armada_39x_clk_gating_init);
diff --git a/drivers/clk/mvebu/common.c b/drivers/clk/mvebu/common.c
index 0d4d1216f2dd..15b370ff3748 100644
--- a/drivers/clk/mvebu/common.c
+++ b/drivers/clk/mvebu/common.c
@@ -121,6 +121,11 @@ void __init mvebu_coreclk_setup(struct device_node *np,
/* Allocate struct for TCLK, cpu clk, and core ratio clocks */
clk_data.clk_num = 2 + desc->num_ratios;
+
+ /* One more clock for the optional refclk */
+ if (desc->get_refclk_freq)
+ clk_data.clk_num += 1;
+
clk_data.clks = kzalloc(clk_data.clk_num * sizeof(struct clk *),
GFP_KERNEL);
if (WARN_ON(!clk_data.clks)) {
@@ -162,6 +167,18 @@ void __init mvebu_coreclk_setup(struct device_node *np,
WARN_ON(IS_ERR(clk_data.clks[2+n]));
};
+ /* Register optional refclk */
+ if (desc->get_refclk_freq) {
+ const char *name = "refclk";
+ of_property_read_string_index(np, "clock-output-names",
+ 2 + desc->num_ratios, &name);
+ rate = desc->get_refclk_freq(base);
+ clk_data.clks[2 + desc->num_ratios] =
+ clk_register_fixed_rate(NULL, name, NULL,
+ CLK_IS_ROOT, rate);
+ WARN_ON(IS_ERR(clk_data.clks[2 + desc->num_ratios]));
+ }
+
/* SAR register isn't needed anymore */
iounmap(base);
diff --git a/drivers/clk/mvebu/common.h b/drivers/clk/mvebu/common.h
index 783b5631a453..f0de6c8a494a 100644
--- a/drivers/clk/mvebu/common.h
+++ b/drivers/clk/mvebu/common.h
@@ -30,6 +30,7 @@ struct coreclk_soc_desc {
u32 (*get_tclk_freq)(void __iomem *sar);
u32 (*get_cpu_freq)(void __iomem *sar);
void (*get_clk_ratio)(void __iomem *sar, int id, int *mult, int *div);
+ u32 (*get_refclk_freq)(void __iomem *sar);
bool (*is_sscg_enabled)(void __iomem *sar);
u32 (*fix_sscg_deviation)(u32 system_clk);
const struct coreclk_ratio *ratios;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.