[PATCH v5 1/6] clk: hisilicon: add CRG driver for hi3519 soc
Jiancheng Xue
xuejiancheng at huawei.com
Thu Jan 7 18:16:35 PST 2016
The CRG(Clock and Reset Generator) block provides clock
and reset signals for other modules in hi3519 soc.
Signed-off-by: Jiancheng Xue <xuejiancheng at huawei.com>
---
.../devicetree/bindings/clock/hi3519-crg.txt | 46 ++++++++
drivers/clk/hisilicon/Kconfig | 7 ++
drivers/clk/hisilicon/Makefile | 2 +
drivers/clk/hisilicon/clk-hi3519.c | 105 +++++++++++++++++
drivers/clk/hisilicon/reset.c | 129 +++++++++++++++++++++
drivers/clk/hisilicon/reset.h | 32 +++++
include/dt-bindings/clock/hi3519-clock.h | 43 +++++++
7 files changed, 364 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/hi3519-crg.txt
create mode 100644 drivers/clk/hisilicon/clk-hi3519.c
create mode 100644 drivers/clk/hisilicon/reset.c
create mode 100644 drivers/clk/hisilicon/reset.h
create mode 100644 include/dt-bindings/clock/hi3519-clock.h
diff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hi3519-crg.txt
new file mode 100644
index 0000000..2d23950
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/hi3519-crg.txt
@@ -0,0 +1,46 @@
+* Hisilicon Hi3519 Clock and Reset Generator(CRG)
+
+The Hi3519 CRG module provides clock and reset signals to various
+controllers within the SoC.
+
+This binding uses the following bindings:
+ Documentation/devicetree/bindings/clock/clock-bindings.txt
+ Documentation/devicetree/bindings/reset/reset.txt
+
+Required Properties:
+
+- compatible: should be one of the following.
+ - "hisilicon,hi3519-crg" - controller compatible with Hi3519 SoC.
+
+- reg: physical base address of the controller and length of memory mapped
+ region.
+
+- #clock-cells: should be 1.
+
+Each clock is assigned an identifier and client nodes use this identifier
+to specify the clock which they consume.
+
+All these identifier could be found in <dt-bindings/clock/hi3519-clock.h>.
+
+- #reset-cells: should be 2.
+
+A reset signal can be controlled by writing a bit register in the CRG module.
+The reset specifier consists of two cells. The first cell represents the
+register offset relative to the base address. The second cell represents the
+bit index in the register.
+
+Example: CRG nodes
+CRG: clock-reset-controller at 12010000 {
+ compatible = "hisilicon,hi3519-crg";
+ reg = <0x12010000 0x10000>;
+ #clock-cells = <1>;
+ #reset-cells = <2>;
+};
+
+Example: consumer nodes
+i2c0: i2c at 12110000 {
+ compatible = "hisilicon,hi3519-i2c";
+ reg = <0x12110000 0x1000>;
+ clocks = <&CRG HI3519_I2C0_RST>;*/
+ resets = <&CRG 0xe4 0>;
+};
diff --git a/drivers/clk/hisilicon/Kconfig b/drivers/clk/hisilicon/Kconfig
index e434854..b6baebf 100644
--- a/drivers/clk/hisilicon/Kconfig
+++ b/drivers/clk/hisilicon/Kconfig
@@ -1,3 +1,10 @@
+config COMMON_CLK_HI3519
+ tristate "Clock Driver for Hi3519"
+ depends on ARCH_HISI
+ default y
+ help
+ Build the clock driver for hi3519.
+
config COMMON_CLK_HI6220
bool "Hi6220 Clock Driver"
depends on ARCH_HISI || COMPILE_TEST
diff --git a/drivers/clk/hisilicon/Makefile b/drivers/clk/hisilicon/Makefile
index 74dba31..3f57b09 100644
--- a/drivers/clk/hisilicon/Makefile
+++ b/drivers/clk/hisilicon/Makefile
@@ -4,8 +4,10 @@
obj-y += clk.o clkgate-separated.o clkdivider-hi6220.o
+obj-$(CONFIG_RESET_CONTROLLER) += reset.o
obj-$(CONFIG_ARCH_HI3xxx) += clk-hi3620.o
obj-$(CONFIG_ARCH_HIP04) += clk-hip04.o
obj-$(CONFIG_ARCH_HIX5HD2) += clk-hix5hd2.o
obj-$(CONFIG_COMMON_CLK_HI6220) += clk-hi6220.o
obj-$(CONFIG_STUB_CLK_HI6220) += clk-hi6220-stub.o
+obj-$(CONFIG_COMMON_CLK_HI3519) += clk-hi3519.o
diff --git a/drivers/clk/hisilicon/clk-hi3519.c b/drivers/clk/hisilicon/clk-hi3519.c
new file mode 100644
index 0000000..72d3a7b0
--- /dev/null
+++ b/drivers/clk/hisilicon/clk-hi3519.c
@@ -0,0 +1,105 @@
+/*
+ * Hi3519 Clock Driver
+ *
+ * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <dt-bindings/clock/hi3519-clock.h>
+#include <linux/delay.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include "clk.h"
+#include "reset.h"
+
+#define HI3519_FIXED_24M (HI3519_EXT_CLKS + 1)
+#define HI3519_FIXED_50M (HI3519_EXT_CLKS + 2)
+#define HI3519_FIXED_75M (HI3519_EXT_CLKS + 3)
+#define HI3519_FIXED_125M (HI3519_EXT_CLKS + 4)
+#define HI3519_FIXED_150M (HI3519_EXT_CLKS + 5)
+#define HI3519_FIXED_200M (HI3519_EXT_CLKS + 6)
+#define HI3519_FIXED_250M (HI3519_EXT_CLKS + 7)
+#define HI3519_FIXED_300M (HI3519_EXT_CLKS + 8)
+#define HI3519_FIXED_400M (HI3519_EXT_CLKS + 9)
+#define HI3519_FMC_MUX (HI3519_EXT_CLKS + 10)
+
+#define HI3519_NR_CLKS 128
+
+static struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] __initdata = {
+ { HI3519_FIXED_3M, "3m", NULL, CLK_IS_ROOT, 3000000, },
+ { HI3519_FIXED_24M, "24m", NULL, CLK_IS_ROOT, 24000000, },
+ { HI3519_FIXED_50M, "50m", NULL, CLK_IS_ROOT, 50000000, },
+ { HI3519_FIXED_75M, "75m", NULL, CLK_IS_ROOT, 75000000, },
+ { HI3519_FIXED_125M, "125m", NULL, CLK_IS_ROOT, 125000000, },
+ { HI3519_FIXED_150M, "150m", NULL, CLK_IS_ROOT, 150000000, },
+ { HI3519_FIXED_200M, "200m", NULL, CLK_IS_ROOT, 200000000, },
+ { HI3519_FIXED_250M, "250m", NULL, CLK_IS_ROOT, 250000000, },
+ { HI3519_FIXED_300M, "300m", NULL, CLK_IS_ROOT, 300000000, },
+ { HI3519_FIXED_400M, "400m", NULL, CLK_IS_ROOT, 400000000, },
+};
+
+static const char *fmc_mux_p[] __initconst = {
+ "24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
+static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
+
+static struct hisi_mux_clock hi3519_mux_clks[] __initdata = {
+ { HI3519_FMC_MUX, "fmc_mux", fmc_mux_p, ARRAY_SIZE(fmc_mux_p),
+ CLK_SET_RATE_PARENT, 0xc0, 2, 3, 0, fmc_mux_table, },
+};
+
+static struct hisi_gate_clock hi3519_gate_clks[] __initdata = {
+ /* fmc */
+ { HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
+ CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
+ /* uart */
+ { HI3519_UART0_CLK, "clk_uart0", "24m",
+ CLK_SET_RATE_PARENT, 0xe4, 20, 0, },
+ { HI3519_UART1_CLK, "clk_uart1", "24m",
+ CLK_SET_RATE_PARENT, 0xe4, 21, 0, },
+ { HI3519_UART2_CLK, "clk_uart2", "24m",
+ CLK_SET_RATE_PARENT, 0xe4, 22, 0, },
+ { HI3519_UART3_CLK, "clk_uart3", "24m",
+ CLK_SET_RATE_PARENT, 0xe4, 23, 0, },
+ { HI3519_UART4_CLK, "clk_uart4", "24m",
+ CLK_SET_RATE_PARENT, 0xe4, 24, 0, },
+ { HI3519_SPI0_CLK, "clk_spi0", "50m",
+ CLK_SET_RATE_PARENT, 0xe4, 16, 0, },
+ { HI3519_SPI1_CLK, "clk_spi1", "50m",
+ CLK_SET_RATE_PARENT, 0xe4, 17, 0, },
+ { HI3519_SPI2_CLK, "clk_spi2", "50m",
+ CLK_SET_RATE_PARENT, 0xe4, 18, 0, },
+};
+
+static void __init hi3519_clk_init(struct device_node *np)
+{
+ struct hisi_clock_data *clk_data;
+
+
+ clk_data = hisi_clk_init(np, HI3519_NR_CLKS);
+ if (!clk_data)
+ return;
+
+ hisi_clk_register_fixed_rate(hi3519_fixed_rate_clks,
+ ARRAY_SIZE(hi3519_fixed_rate_clks),
+ clk_data);
+ hisi_clk_register_mux(hi3519_mux_clks, ARRAY_SIZE(hi3519_mux_clks),
+ clk_data);
+ hisi_clk_register_gate(hi3519_gate_clks,
+ ARRAY_SIZE(hi3519_gate_clks), clk_data);
+
+ hisi_reset_init(np);
+}
+
+CLK_OF_DECLARE(hi3519_clk, "hisilicon,hi3519-crg", hi3519_clk_init);
diff --git a/drivers/clk/hisilicon/reset.c b/drivers/clk/hisilicon/reset.c
new file mode 100644
index 0000000..f11561c
--- /dev/null
+++ b/drivers/clk/hisilicon/reset.c
@@ -0,0 +1,129 @@
+/*
+ * Hisilicon Reset Controller Driver
+ *
+ * Copyright (c) 2015-2016 HiSilicon Technologies Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+#define HISI_RESET_BIT_MASK 0x1f
+#define HISI_RESET_OFFSET_SHIFT 8
+#define HISI_RESET_OFFSET_MASK 0xffff00
+
+struct hisi_reset_controller {
+ spinlock_t lock;
+ void __iomem *membase;
+ struct reset_controller_dev rcdev;
+};
+
+
+#define to_hisi_reset_controller(rcdev) \
+ container_of(rcdev, struct hisi_reset_controller, rcdev)
+
+static int hisi_reset_of_xlate(struct reset_controller_dev *rcdev,
+ const struct of_phandle_args *reset_spec)
+{
+ u32 offset;
+ u8 bit;
+
+ if (WARN_ON(reset_spec->args_count != rcdev->of_reset_n_cells))
+ return -EINVAL;
+
+ offset = (reset_spec->args[0] << HISI_RESET_OFFSET_SHIFT)
+ & HISI_RESET_OFFSET_MASK;
+ bit = reset_spec->args[1] & HISI_RESET_BIT_MASK;
+ return (offset | bit);
+}
+
+static int hisi_reset_assert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct hisi_reset_controller *rstc = to_hisi_reset_controller(rcdev);
+ unsigned long flags;
+ u32 offset, reg;
+ u8 bit;
+
+ offset = (id & HISI_RESET_OFFSET_MASK) >> HISI_RESET_OFFSET_SHIFT;
+ bit = id & HISI_RESET_BIT_MASK;
+
+ spin_lock_irqsave(&rstc->lock, flags);
+
+ reg = readl(rstc->membase + offset);
+ writel(reg | BIT(bit), rstc->membase + offset);
+
+ spin_unlock_irqrestore(&rstc->lock, flags);
+
+ return 0;
+}
+
+static int hisi_reset_deassert(struct reset_controller_dev *rcdev,
+ unsigned long id)
+{
+ struct hisi_reset_controller *rstc = to_hisi_reset_controller(rcdev);
+ unsigned long flags;
+ u32 offset, reg;
+ u8 bit;
+
+ offset = (id & HISI_RESET_OFFSET_MASK) >> HISI_RESET_OFFSET_SHIFT;
+ bit = id & HISI_RESET_BIT_MASK;
+
+ spin_lock_irqsave(&rstc->lock, flags);
+
+ reg = readl(rstc->membase + offset);
+ writel(reg & ~BIT(bit), rstc->membase + offset);
+
+ spin_unlock_irqrestore(&rstc->lock, flags);
+
+ return 0;
+}
+
+static struct reset_control_ops hisi_reset_ops = {
+ .assert = hisi_reset_assert,
+ .deassert = hisi_reset_deassert,
+};
+
+int __init hisi_reset_init(struct device_node *np)
+{
+ struct hisi_reset_controller *rstc;
+
+ rstc = kzalloc(sizeof(*rstc), GFP_KERNEL);
+ if (!rstc)
+ return -ENOMEM;
+
+ rstc->membase = of_iomap(np, 0);
+ if (!rstc->membase)
+ return -EINVAL;
+
+ spin_lock_init(&rstc->lock);
+
+ rstc->rcdev.owner = THIS_MODULE;
+ rstc->rcdev.ops = &hisi_reset_ops;
+ rstc->rcdev.of_node = np;
+ rstc->rcdev.of_reset_n_cells = 2;
+ rstc->rcdev.of_xlate = hisi_reset_of_xlate;
+
+ return reset_controller_register(&rstc->rcdev);
+}
diff --git a/drivers/clk/hisilicon/reset.h b/drivers/clk/hisilicon/reset.h
new file mode 100644
index 0000000..37856089
--- /dev/null
+++ b/drivers/clk/hisilicon/reset.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2015 HiSilicon Technologies Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __HISI_RESET_H
+#define __HISI_RESET_H
+
+#include <linux/of.h>
+
+#ifdef CONFIG_RESET_CONTROLLER
+int __init hisi_reset_init(struct device_node *np);
+#else
+static inline int __init hisi_reset_init(struct device_node *np)
+{
+ return 0;
+}
+#endif
+
+#endif /* __HISI_RESET_H */
diff --git a/include/dt-bindings/clock/hi3519-clock.h b/include/dt-bindings/clock/hi3519-clock.h
new file mode 100644
index 0000000..1e4a3c1
--- /dev/null
+++ b/include/dt-bindings/clock/hi3519-clock.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2015 HiSilicon Technologies Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __DTS_HI3519_CLOCK_H
+#define __DTS_HI3519_CLOCK_H
+
+#define HI3519_FIXED_3M 1
+#define HI3519_FMC_CLK 2
+#define HI3519_USB2_BUS_CLK 3
+#define HI3519_USB2_PORT_CLK 4
+#define HI3519_USB3_CLK 5
+#define HI3519_ETH_PHY_CLK 6
+#define HI3519_ETH_MAC_CLK 7
+#define HI3519_ETH_MACIF_CLK 8
+#define HI3519_PWM_CLK 9
+#define HI3519_DMA_CLK 10
+#define HI3519_SPI0_CLK 11
+#define HI3519_SPI1_CLK 12
+#define HI3519_SPI2_CLK 13
+#define HI3519_IR_CLK 14
+#define HI3519_UART0_CLK 15
+#define HI3519_UART1_CLK 16
+#define HI3519_UART2_CLK 17
+#define HI3519_UART3_CLK 18
+#define HI3519_UART4_CLK 19
+
+#define HI3519_EXT_CLKS 19
+
+#endif /* __DTS_HI3519_CLOCK_H */
--
1.9.1
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