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-rw-r--r--drivers/clk/mvebu/Kconfig3
-rw-r--r--drivers/clk/mvebu/Makefile1
-rw-r--r--drivers/clk/mvebu/cp110-system-controller.c406
3 files changed, 410 insertions, 0 deletions
diff --git a/drivers/clk/mvebu/Kconfig b/drivers/clk/mvebu/Kconfig
index bf7ae003f20f..3165da77d525 100644
--- a/drivers/clk/mvebu/Kconfig
+++ b/drivers/clk/mvebu/Kconfig
@@ -32,6 +32,9 @@ config ARMADA_XP_CLK
config ARMADA_AP806_SYSCON
bool
+config ARMADA_CP110_SYSCON
+ bool
+
config DOVE_CLK
bool
select MVEBU_CLK_COMMON
diff --git a/drivers/clk/mvebu/Makefile b/drivers/clk/mvebu/Makefile
index f4aa481678dd..7172ef65693d 100644
--- a/drivers/clk/mvebu/Makefile
+++ b/drivers/clk/mvebu/Makefile
@@ -8,6 +8,7 @@ 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_ARMADA_AP806_SYSCON) += ap806-system-controller.o
+obj-$(CONFIG_ARMADA_CP110_SYSCON) += cp110-system-controller.o
obj-$(CONFIG_DOVE_CLK) += dove.o dove-divider.o
obj-$(CONFIG_KIRKWOOD_CLK) += kirkwood.o
obj-$(CONFIG_ORION_CLK) += orion.o
diff --git a/drivers/clk/mvebu/cp110-system-controller.c b/drivers/clk/mvebu/cp110-system-controller.c
new file mode 100644
index 000000000000..7fa42d6b2b92
--- /dev/null
+++ b/drivers/clk/mvebu/cp110-system-controller.c
@@ -0,0 +1,406 @@
+/*
+ * Marvell Armada CP110 System Controller
+ *
+ * Copyright (C) 2016 Marvell
+ *
+ * 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.
+ */
+
+/*
+ * CP110 has 5 core clocks:
+ *
+ * - APLL (1 Ghz)
+ * - PPv2 core (1/3 APLL)
+ * - EIP (1/2 APLL)
+ * - Core (1/2 EIP)
+ *
+ * - NAND clock, which is either:
+ * - Equal to the core clock
+ * - 2/5 APLL
+ *
+ * CP110 has 32 gatable clocks, for the various peripherals in the
+ * IP. They have fairly complicated parent/child relationships.
+ */
+
+#define pr_fmt(fmt) "cp110-system-controller: " fmt
+
+#include <linux/clk-provider.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define CP110_PM_CLOCK_GATING_REG 0x220
+#define CP110_NAND_FLASH_CLK_CTRL_REG 0x700
+#define NF_CLOCK_SEL_400_MASK BIT(0)
+
+enum {
+ CP110_CLK_TYPE_CORE,
+ CP110_CLK_TYPE_GATABLE,
+};
+
+#define CP110_MAX_CORE_CLOCKS 5
+#define CP110_MAX_GATABLE_CLOCKS 32
+
+#define CP110_CLK_NUM \
+ (CP110_MAX_CORE_CLOCKS + CP110_MAX_GATABLE_CLOCKS)
+
+#define CP110_CORE_APLL 0
+#define CP110_CORE_PPV2 1
+#define CP110_CORE_EIP 2
+#define CP110_CORE_CORE 3
+#define CP110_CORE_NAND 4
+
+/* A number of gatable clocks need special handling */
+#define CP110_GATE_AUDIO 0
+#define CP110_GATE_COMM_UNIT 1
+#define CP110_GATE_NAND 2
+#define CP110_GATE_PPV2 3
+#define CP110_GATE_SDIO 4
+#define CP110_GATE_XOR1 7
+#define CP110_GATE_XOR0 8
+#define CP110_GATE_PCIE_X1_0 11
+#define CP110_GATE_PCIE_X1_1 12
+#define CP110_GATE_PCIE_X4 13
+#define CP110_GATE_PCIE_XOR 14
+#define CP110_GATE_SATA 15
+#define CP110_GATE_SATA_USB 16
+#define CP110_GATE_MAIN 17
+#define CP110_GATE_SDMMC 18
+#define CP110_GATE_SLOW_IO 21
+#define CP110_GATE_USB3H0 22
+#define CP110_GATE_USB3H1 23
+#define CP110_GATE_USB3DEV 24
+#define CP110_GATE_EIP150 25
+#define CP110_GATE_EIP197 26
+
+static struct clk *cp110_clks[CP110_CLK_NUM];
+
+static struct clk_onecell_data cp110_clk_data = {
+ .clks = cp110_clks,
+ .clk_num = CP110_CLK_NUM,
+};
+
+struct cp110_gate_clk {
+ struct clk_hw hw;
+ struct regmap *regmap;
+ u8 bit_idx;
+};
+
+#define to_cp110_gate_clk(clk) container_of(clk, struct cp110_gate_clk, hw)
+
+static int cp110_gate_enable(struct clk_hw *hw)
+{
+ struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);
+
+ regmap_update_bits(gate->regmap, CP110_PM_CLOCK_GATING_REG,
+ BIT(gate->bit_idx), BIT(gate->bit_idx));
+
+ return 0;
+}
+
+static void cp110_gate_disable(struct clk_hw *hw)
+{
+ struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);
+
+ regmap_update_bits(gate->regmap, CP110_PM_CLOCK_GATING_REG,
+ BIT(gate->bit_idx), 0);
+}
+
+static int cp110_gate_is_enabled(struct clk_hw *hw)
+{
+ struct cp110_gate_clk *gate = to_cp110_gate_clk(hw);
+ u32 val;
+
+ regmap_read(gate->regmap, CP110_PM_CLOCK_GATING_REG, &val);
+
+ return val & BIT(gate->bit_idx);
+}
+
+static const struct clk_ops cp110_gate_ops = {
+ .enable = cp110_gate_enable,
+ .disable = cp110_gate_disable,
+ .is_enabled = cp110_gate_is_enabled,
+};
+
+static struct clk *cp110_register_gate(const char *name,
+ const char *parent_name,
+ struct regmap *regmap, u8 bit_idx)
+{
+ struct cp110_gate_clk *gate;
+ struct clk *clk;
+ struct clk_init_data init;
+
+ gate = kzalloc(sizeof(*gate), GFP_KERNEL);
+ if (!gate)
+ return ERR_PTR(-ENOMEM);
+
+ init.name = name;
+ init.ops = &cp110_gate_ops;
+ init.parent_names = &parent_name;
+ init.num_parents = 1;
+
+ gate->regmap = regmap;
+ gate->bit_idx = bit_idx;
+ gate->hw.init = &init;
+
+ clk = clk_register(NULL, &gate->hw);
+ if (IS_ERR(clk))
+ kfree(gate);
+
+ return clk;
+}
+
+static void cp110_unregister_gate(struct clk *clk)
+{
+ struct clk_hw *hw;
+
+ hw = __clk_get_hw(clk);
+ if (!hw)
+ return;
+
+ clk_unregister(clk);
+ kfree(to_cp110_gate_clk(hw));
+}
+
+static struct clk *cp110_of_clk_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct clk_onecell_data *clk_data = data;
+ unsigned int type = clkspec->args[0];
+ unsigned int idx = clkspec->args[1];
+
+ if (type == CP110_CLK_TYPE_CORE) {
+ if (idx > CP110_MAX_CORE_CLOCKS)
+ return ERR_PTR(-EINVAL);
+ return clk_data->clks[idx];
+ } else if (type == CP110_CLK_TYPE_GATABLE) {
+ if (idx > CP110_MAX_GATABLE_CLOCKS)
+ return ERR_PTR(-EINVAL);
+ return clk_data->clks[CP110_MAX_CORE_CLOCKS + idx];
+ }
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int cp110_syscon_clk_probe(struct platform_device *pdev)
+{
+ struct regmap *regmap;
+ struct device_node *np = pdev->dev.of_node;
+ const char *ppv2_name, *apll_name, *core_name, *eip_name, *nand_name;
+ struct clk *clk;
+ u32 nand_clk_ctrl;
+ int i, ret;
+
+ regmap = syscon_node_to_regmap(np);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ ret = regmap_read(regmap, CP110_NAND_FLASH_CLK_CTRL_REG,
+ &nand_clk_ctrl);
+ if (ret)
+ return ret;
+
+ /* Register the APLL which is the root of the clk tree */
+ of_property_read_string_index(np, "core-clock-output-names",
+ CP110_CORE_APLL, &apll_name);
+ clk = clk_register_fixed_rate(NULL, apll_name, NULL, 0,
+ 1000 * 1000 * 1000);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto fail0;
+ }
+
+ cp110_clks[CP110_CORE_APLL] = clk;
+
+ /* PPv2 is APLL/3 */
+ of_property_read_string_index(np, "core-clock-output-names",
+ CP110_CORE_PPV2, &ppv2_name);
+ clk = clk_register_fixed_factor(NULL, ppv2_name, apll_name, 0, 1, 3);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto fail1;
+ }
+
+ cp110_clks[CP110_CORE_PPV2] = clk;
+
+ /* EIP clock is APLL/2 */
+ of_property_read_string_index(np, "core-clock-output-names",
+ CP110_CORE_EIP, &eip_name);
+ clk = clk_register_fixed_factor(NULL, eip_name, apll_name, 0, 1, 2);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto fail2;
+ }
+
+ cp110_clks[CP110_CORE_EIP] = clk;
+
+ /* Core clock is EIP/2 */
+ of_property_read_string_index(np, "core-clock-output-names",
+ CP110_CORE_CORE, &core_name);
+ clk = clk_register_fixed_factor(NULL, core_name, eip_name, 0, 1, 2);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto fail3;
+ }
+
+ cp110_clks[CP110_CORE_CORE] = clk;
+
+ /* NAND can be either APLL/2.5 or core clock */
+ of_property_read_string_index(np, "core-clock-output-names",
+ CP110_CORE_NAND, &nand_name);
+ if (nand_clk_ctrl & NF_CLOCK_SEL_400_MASK)
+ clk = clk_register_fixed_factor(NULL, nand_name,
+ apll_name, 0, 2, 5);
+ else
+ clk = clk_register_fixed_factor(NULL, nand_name,
+ core_name, 0, 1, 1);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto fail4;
+ }
+
+ cp110_clks[CP110_CORE_NAND] = clk;
+
+ for (i = 0; i < CP110_MAX_GATABLE_CLOCKS; i++) {
+ const char *parent, *name;
+ int ret;
+
+ ret = of_property_read_string_index(np,
+ "gate-clock-output-names",
+ i, &name);
+ /* Reached the end of the list? */
+ if (ret < 0)
+ break;
+
+ if (!strcmp(name, "none"))
+ continue;
+
+ switch (i) {
+ case CP110_GATE_AUDIO:
+ case CP110_GATE_COMM_UNIT:
+ case CP110_GATE_EIP150:
+ case CP110_GATE_EIP197:
+ case CP110_GATE_SLOW_IO:
+ of_property_read_string_index(np,
+ "gate-clock-output-names",
+ CP110_GATE_MAIN, &parent);
+ break;
+ case CP110_GATE_NAND:
+ parent = nand_name;
+ break;
+ case CP110_GATE_PPV2:
+ parent = ppv2_name;
+ break;
+ case CP110_GATE_SDIO:
+ of_property_read_string_index(np,
+ "gate-clock-output-names",
+ CP110_GATE_SDMMC, &parent);
+ break;
+ case CP110_GATE_XOR1:
+ case CP110_GATE_XOR0:
+ case CP110_GATE_PCIE_X1_0:
+ case CP110_GATE_PCIE_X1_1:
+ case CP110_GATE_PCIE_X4:
+ of_property_read_string_index(np,
+ "gate-clock-output-names",
+ CP110_GATE_PCIE_XOR, &parent);
+ break;
+ case CP110_GATE_SATA:
+ case CP110_GATE_USB3H0:
+ case CP110_GATE_USB3H1:
+ case CP110_GATE_USB3DEV:
+ of_property_read_string_index(np,
+ "gate-clock-output-names",
+ CP110_GATE_SATA_USB, &parent);
+ break;
+ default:
+ parent = core_name;
+ break;
+ }
+
+ clk = cp110_register_gate(name, parent, regmap, i);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ goto fail_gate;
+ }
+
+ cp110_clks[CP110_MAX_CORE_CLOCKS + i] = clk;
+ }
+
+ ret = of_clk_add_provider(np, cp110_of_clk_get, &cp110_clk_data);
+ if (ret)
+ goto fail_clk_add;
+
+ return 0;
+
+fail_clk_add:
+fail_gate:
+ for (i = 0; i < CP110_MAX_GATABLE_CLOCKS; i++) {
+ clk = cp110_clks[CP110_MAX_CORE_CLOCKS + i];
+
+ if (clk)
+ cp110_unregister_gate(clk);
+ }
+
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_NAND]);
+fail4:
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_CORE]);
+fail3:
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_EIP]);
+fail2:
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_PPV2]);
+fail1:
+ clk_unregister_fixed_rate(cp110_clks[CP110_CORE_APLL]);
+fail0:
+ return ret;
+}
+
+static int cp110_syscon_clk_remove(struct platform_device *pdev)
+{
+ int i;
+
+ of_clk_del_provider(pdev->dev.of_node);
+
+ for (i = 0; i < CP110_MAX_GATABLE_CLOCKS; i++) {
+ struct clk *clk = cp110_clks[CP110_MAX_CORE_CLOCKS + i];
+
+ if (clk)
+ cp110_unregister_gate(clk);
+ }
+
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_NAND]);
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_CORE]);
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_EIP]);
+ clk_unregister_fixed_factor(cp110_clks[CP110_CORE_PPV2]);
+ clk_unregister_fixed_rate(cp110_clks[CP110_CORE_APLL]);
+
+ return 0;
+}
+
+static const struct of_device_id cp110_syscon_of_match[] = {
+ { .compatible = "marvell,cp110-system-controller0", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, armada8k_pcie_of_match);
+
+static struct platform_driver cp110_syscon_driver = {
+ .probe = cp110_syscon_clk_probe,
+ .remove = cp110_syscon_clk_remove,
+ .driver = {
+ .name = "marvell-cp110-system-controller0",
+ .of_match_table = cp110_syscon_of_match,
+ },
+};
+
+module_platform_driver(cp110_syscon_driver);
+
+MODULE_DESCRIPTION("Marvell CP110 System Controller 0 driver");
+MODULE_AUTHOR("Thomas Petazzoni <thomas.petazzoni@free-electrons.com>");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-19 19:38:31 +0000