diff mbox

[RESEND,v10,2/6] clk: hisilicon: add CRG driver for hi3519 soc

Message ID 1459411811-12390-3-git-send-email-xuejiancheng@hisilicon.com (mailing list archive)
State New, archived
Headers show

Commit Message

Jiancheng Xue March 31, 2016, 8:10 a.m. UTC 
From: Jiancheng Xue <xuejiancheng@huawei.com>

The CRG(Clock and Reset Generator) block provides clock
and reset signals for other modules in hi3519 soc.

Signed-off-by: Jiancheng Xue <xuejiancheng@huawei.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
---
 .../devicetree/bindings/clock/hi3519-crg.txt       |  46 ++++++++
 drivers/clk/hisilicon/Kconfig                      |  15 +++
 drivers/clk/hisilicon/Makefile                     |   2 +
 drivers/clk/hisilicon/clk-hi3519.c                 | 129 +++++++++++++++++++++
 drivers/clk/hisilicon/reset.c                      | 124 ++++++++++++++++++++
 drivers/clk/hisilicon/reset.h                      |  32 +++++
 include/dt-bindings/clock/hi3519-clock.h           |  40 +++++++
 7 files changed, 388 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

Comments

Jiancheng Xue April 15, 2016, 1:30 a.m. UTC | #1 
Hi,

On 2016/3/31 16:10, Jiancheng Xue wrote:
> From: Jiancheng Xue <xuejiancheng@huawei.com>
> 
> The CRG(Clock and Reset Generator) block provides clock
> and reset signals for other modules in hi3519 soc.
> 
> Signed-off-by: Jiancheng Xue <xuejiancheng@huawei.com>
> Acked-by: Rob Herring <robh@kernel.org>
> Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
> ---
I hope this patchset can be merged through arch/arm tree
The dts binding part has been acked by Rob Herring, and
the reset part has been acked by Philipp Zabel. Could you
help me to ack this whole clk patch? Please also let me
know if this patch still have issues. Thank you very much!

Regards,
Jiancheng

>  .../devicetree/bindings/clock/hi3519-crg.txt       |  46 ++++++++
>  drivers/clk/hisilicon/Kconfig                      |  15 +++
>  drivers/clk/hisilicon/Makefile                     |   2 +
>  drivers/clk/hisilicon/clk-hi3519.c                 | 129 +++++++++++++++++++++
>  drivers/clk/hisilicon/reset.c                      | 124 ++++++++++++++++++++
>  drivers/clk/hisilicon/reset.h                      |  32 +++++
>  include/dt-bindings/clock/hi3519-clock.h           |  40 +++++++
>  7 files changed, 388 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..acd1f23
> --- /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@12010000 {
> +	compatible = "hisilicon,hi3519-crg";
> +	reg = <0x12010000 0x10000>;
> +	#clock-cells = <1>;
> +	#reset-cells = <2>;
> +};
> +
> +Example: consumer nodes
> +i2c0: i2c@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..3f537a0 100644
> --- a/drivers/clk/hisilicon/Kconfig
> +++ b/drivers/clk/hisilicon/Kconfig
> @@ -1,3 +1,11 @@
> +config COMMON_CLK_HI3519
> +	tristate "Hi3519 Clock Driver"
> +	depends on ARCH_HISI || COMPILE_TEST
> +	select RESET_HISI
> +	default ARCH_HISI
> +	help
> +	  Build the clock driver for hi3519.
> +
>  config COMMON_CLK_HI6220
>  	bool "Hi6220 Clock Driver"
>  	depends on ARCH_HISI || COMPILE_TEST
> @@ -5,6 +13,13 @@ config COMMON_CLK_HI6220
>  	help
>  	  Build the Hisilicon Hi6220 clock driver based on the common clock framework.
>  
> +config RESET_HISI
> +	bool "HiSilicon Reset Controller Driver"
> +	depends on ARCH_HISI || COMPILE_TEST
> +	select RESET_CONTROLLER
> +	help
> +	  Build reset controller driver for HiSilicon device chipsets.
> +
>  config STUB_CLK_HI6220
>  	bool "Hi6220 Stub Clock Driver"
>  	depends on COMMON_CLK_HI6220 && MAILBOX
> diff --git a/drivers/clk/hisilicon/Makefile b/drivers/clk/hisilicon/Makefile
> index 74dba31..e169ec7 100644
> --- a/drivers/clk/hisilicon/Makefile
> +++ b/drivers/clk/hisilicon/Makefile
> @@ -7,5 +7,7 @@ obj-y	+= clk.o clkgate-separated.o clkdivider-hi6220.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_HI3519)	+= clk-hi3519.o
>  obj-$(CONFIG_COMMON_CLK_HI6220)	+= clk-hi6220.o
> +obj-$(CONFIG_RESET_HISI)	+= reset.o
>  obj-$(CONFIG_STUB_CLK_HI6220)	+= clk-hi6220-stub.o
> diff --git a/drivers/clk/hisilicon/clk-hi3519.c b/drivers/clk/hisilicon/clk-hi3519.c
> new file mode 100644
> index 0000000..ee9df82
> --- /dev/null
> +++ b/drivers/clk/hisilicon/clk-hi3519.c
> @@ -0,0 +1,129 @@
> +/*
> + * 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/module.h>
> +#include <linux/platform_device.h>
> +#include "clk.h"
> +#include "reset.h"
> +
> +#define HI3519_INNER_CLK_OFFSET	64
> +#define HI3519_FIXED_24M	65
> +#define HI3519_FIXED_50M	66
> +#define HI3519_FIXED_75M	67
> +#define HI3519_FIXED_125M	68
> +#define HI3519_FIXED_150M	69
> +#define HI3519_FIXED_200M	70
> +#define HI3519_FIXED_250M	71
> +#define HI3519_FIXED_300M	72
> +#define HI3519_FIXED_400M	73
> +#define HI3519_FMC_MUX		74
> +
> +#define HI3519_NR_CLKS		128
> +
> +static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
> +	{ 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 *const fmc_mux_p[] = {
> +		"24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
> +static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
> +
> +static const struct hisi_mux_clock hi3519_mux_clks[] = {
> +	{ 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 const struct hisi_gate_clock hi3519_gate_clks[] = {
> +	{ HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
> +		CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
> +	{ 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 int hi3519_clk_probe(struct platform_device *pdev)
> +{
> +	struct device_node *np = pdev->dev.of_node;
> +	struct hisi_clock_data *clk_data;
> +
> +	clk_data = hisi_clk_init(np, HI3519_NR_CLKS);
> +	if (!clk_data)
> +		return -ENODEV;
> +
> +	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);
> +
> +	return hisi_reset_init(np);
> +}
> +
> +static const struct of_device_id hi3519_clk_match_table[] = {
> +	{ .compatible = "hisilicon,hi3519-crg" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
> +
> +static struct platform_driver hi3519_clk_driver = {
> +	.probe          = hi3519_clk_probe,
> +	.driver         = {
> +		.name   = "hi3519-clk",
> +		.of_match_table = hi3519_clk_match_table,
> +	},
> +};
> +
> +static int __init hi3519_clk_init(void)
> +{
> +	return platform_driver_register(&hi3519_clk_driver);
> +}
> +core_initcall(hi3519_clk_init);
> +
> +static void __exit hi3519_clk_exit(void)
> +{
> +	platform_driver_unregister(&hi3519_clk_driver);
> +}
> +module_exit(hi3519_clk_exit);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");
> diff --git a/drivers/clk/hisilicon/reset.c b/drivers/clk/hisilicon/reset.c
> new file mode 100644
> index 0000000..8035366
> --- /dev/null
> +++ b/drivers/clk/hisilicon/reset.c
> @@ -0,0 +1,124 @@
> +/*
> + * 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/io.h>
> +#include <linux/of_address.h>
> +#include <linux/reset-controller.h>
> +#include <linux/slab.h>
> +#include <linux/spinlock.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 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);
> +}
> +EXPORT_SYMBOL_GPL(hisi_reset_init);
> diff --git a/drivers/clk/hisilicon/reset.h b/drivers/clk/hisilicon/reset.h
> new file mode 100644
> index 0000000..ffad4d7
> --- /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
> +
> +struct device_node;
> +
> +#ifdef CONFIG_RESET_CONTROLLER
> +int hisi_reset_init(struct device_node *np);
> +#else
> +static inline int 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..14f4d21
> --- /dev/null
> +++ b/include/dt-bindings/clock/hi3519-clock.h
> @@ -0,0 +1,40 @@
> +/*
> + * 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_FMC_CLK			1
> +#define HI3519_SPI0_CLK			2
> +#define HI3519_SPI1_CLK			3
> +#define HI3519_SPI2_CLK			4
> +#define HI3519_UART0_CLK		5
> +#define HI3519_UART1_CLK		6
> +#define HI3519_UART2_CLK		7
> +#define HI3519_UART3_CLK		8
> +#define HI3519_UART4_CLK		9
> +#define HI3519_PWM_CLK			10
> +#define HI3519_DMA_CLK			11
> +#define HI3519_IR_CLK			12
> +#define HI3519_ETH_PHY_CLK		13
> +#define HI3519_ETH_MAC_CLK		14
> +#define HI3519_ETH_MACIF_CLK		15
> +#define HI3519_USB2_BUS_CLK		16
> +#define HI3519_USB2_PORT_CLK		17
> +#define HI3519_USB3_CLK			18
> +
> +#endif	/* __DTS_HI3519_CLOCK_H */
>
Stephen Boyd April 16, 2016, 12:40 a.m. UTC | #2 
On 03/31, Jiancheng Xue wrote:
> diff --git a/drivers/clk/hisilicon/clk-hi3519.c b/drivers/clk/hisilicon/clk-hi3519.c
> new file mode 100644
> index 0000000..ee9df82
> --- /dev/null
> +++ b/drivers/clk/hisilicon/clk-hi3519.c
> @@ -0,0 +1,129 @@
> +/*
> + * 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/module.h>
> +#include <linux/platform_device.h>

Please include <linux/clk-provider.h> here.

> +#include "clk.h"
> +#include "reset.h"
> +
> +#define HI3519_INNER_CLK_OFFSET	64
> +#define HI3519_FIXED_24M	65
> +#define HI3519_FIXED_50M	66
> +#define HI3519_FIXED_75M	67
> +#define HI3519_FIXED_125M	68
> +#define HI3519_FIXED_150M	69
> +#define HI3519_FIXED_200M	70
> +#define HI3519_FIXED_250M	71
> +#define HI3519_FIXED_300M	72
> +#define HI3519_FIXED_400M	73
> +#define HI3519_FMC_MUX		74
> +
> +#define HI3519_NR_CLKS		128
> +
> +static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
> +	{ 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, },

CLK_IS_ROOT is dead. Please remove it.

> +};
> +
> +static const char *const fmc_mux_p[] = {
> +		"24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
> +static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
> +
> +static const struct hisi_mux_clock hi3519_mux_clks[] = {
> +	{ 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 const struct hisi_gate_clock hi3519_gate_clks[] = {
> +	{ HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
> +		CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
> +	{ 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 int hi3519_clk_probe(struct platform_device *pdev)
> +{
> +	struct device_node *np = pdev->dev.of_node;
> +	struct hisi_clock_data *clk_data;
> +
> +	clk_data = hisi_clk_init(np, HI3519_NR_CLKS);
> +	if (!clk_data)
> +		return -ENODEV;
> +
> +	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);
> +
> +	return hisi_reset_init(np);

Now that this is a platform driver we need to do lots of cleanup
in error cases. I mean we need to unregister clks, OF clk
providers, and reset controllers. Please add all that code too.

> +}
> +
> +static const struct of_device_id hi3519_clk_match_table[] = {
> +	{ .compatible = "hisilicon,hi3519-crg" },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
> +
> +static struct platform_driver hi3519_clk_driver = {
> +	.probe          = hi3519_clk_probe,
> +	.driver         = {
> +		.name   = "hi3519-clk",
> +		.of_match_table = hi3519_clk_match_table,
> +	},
> +};
> +
> +static int __init hi3519_clk_init(void)
> +{
> +	return platform_driver_register(&hi3519_clk_driver);
> +}
> +core_initcall(hi3519_clk_init);
> +
> +static void __exit hi3519_clk_exit(void)
> +{
> +	platform_driver_unregister(&hi3519_clk_driver);
> +}
> +module_exit(hi3519_clk_exit);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");
> diff --git a/drivers/clk/hisilicon/reset.c b/drivers/clk/hisilicon/reset.c
> new file mode 100644
> index 0000000..8035366
> --- /dev/null
> +++ b/drivers/clk/hisilicon/reset.c
> @@ -0,0 +1,124 @@
> +/*
> + * 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/io.h>
> +#include <linux/of_address.h>
> +#include <linux/reset-controller.h>
> +#include <linux/slab.h>
> +#include <linux/spinlock.h>

Please add #include "reset.h"

> +
> +#define	HISI_RESET_BIT_MASK	0x1f
> +#define	HISI_RESET_OFFSET_SHIFT	8
> +#define	HISI_RESET_OFFSET_MASK	0xffff00
[..]
> +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 = {

const? I think that's required now.

> +	.assert		= hisi_reset_assert,
> +	.deassert	= hisi_reset_deassert,
> +};
> +
> +int 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;

memory leak of rstc here.

> +
> +	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);
> +}
> +EXPORT_SYMBOL_GPL(hisi_reset_init);
Stephen Boyd April 16, 2016, 12:41 a.m. UTC | #3 
On 04/15, Jiancheng Xue wrote:
> Hi,
> 
> On 2016/3/31 16:10, Jiancheng Xue wrote:
> > From: Jiancheng Xue <xuejiancheng@huawei.com>
> > 
> > The CRG(Clock and Reset Generator) block provides clock
> > and reset signals for other modules in hi3519 soc.
> > 
> > Signed-off-by: Jiancheng Xue <xuejiancheng@huawei.com>
> > Acked-by: Rob Herring <robh@kernel.org>
> > Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
> > ---
> I hope this patchset can be merged through arch/arm tree
> The dts binding part has been acked by Rob Herring, and
> the reset part has been acked by Philipp Zabel. Could you
> help me to ack this whole clk patch? Please also let me
> know if this patch still have issues. Thank you very much!

Can I merge it through clk tree and make a stable branch to pull
through arm-soc? I assume another patch is coming but it's good
to get clarity before then.
Jiancheng Xue April 18, 2016, 2:59 a.m. UTC | #4 
Hi Stephen,
   	
On 2016/4/16 8:41, Stephen Boyd wrote:
> On 04/15, Jiancheng Xue wrote:
>> Hi,
>>
>> On 2016/3/31 16:10, Jiancheng Xue wrote:
>>> From: Jiancheng Xue <xuejiancheng@huawei.com>
>>>
>>> The CRG(Clock and Reset Generator) block provides clock
>>> and reset signals for other modules in hi3519 soc.
>>>
>>> Signed-off-by: Jiancheng Xue <xuejiancheng@huawei.com>
>>> Acked-by: Rob Herring <robh@kernel.org>
>>> Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
>>> ---
>> I hope this patchset can be merged through arch/arm tree
>> The dts binding part has been acked by Rob Herring, and
>> the reset part has been acked by Philipp Zabel. Could you
>> help me to ack this whole clk patch? Please also let me
>> know if this patch still have issues. Thank you very much!
> 
> Can I merge it through clk tree and make a stable branch to pull
> through arm-soc? I assume another patch is coming but it's good
> to get clarity before then.
> 
Yes. It's also OK for me if this patchset can be merged into mainline
Finally. Then can I send reset controller driver, clock driver and arm-soc
patches separately?

Regards,
Jiancheng
Jiancheng Xue April 19, 2016, 7:11 a.m. UTC | #5 
Hi Stephen,

On 2016/4/16 8:40, Stephen Boyd wrote:
> On 03/31, Jiancheng Xue wrote:
>> diff --git a/drivers/clk/hisilicon/clk-hi3519.c b/drivers/clk/hisilicon/clk-hi3519.c
>> new file mode 100644
>> index 0000000..ee9df82
>> --- /dev/null
>> +++ b/drivers/clk/hisilicon/clk-hi3519.c
>> @@ -0,0 +1,129 @@
>> +/*
>> + * 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/>.
>> + */
>> +
[...]
>> +static int hi3519_clk_probe(struct platform_device *pdev)
>> +{
>> +	struct device_node *np = pdev->dev.of_node;
>> +	struct hisi_clock_data *clk_data;
>> +
>> +	clk_data = hisi_clk_init(np, HI3519_NR_CLKS);
>> +	if (!clk_data)
>> +		return -ENODEV;
>> +
>> +	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);
>> +
>> +	return hisi_reset_init(np);
> 
> Now that this is a platform driver we need to do lots of cleanup
> in error cases. I mean we need to unregister clks, OF clk
> providers, and reset controllers. Please add all that code too.
> 
Practically, clock driver is always needed during the whole system running.
It must be probed and never be removed. Is it a must for clock driver being
a platform driver? If it's not, I'd prefer to use CLK_OF_DECLARE instead.
Could you help me to understand the advantage of platform driver here? If
it's really a must, I will continue to fix these bugs as you pointed. It indeed
needs to be changed a lot including drivers/clk/hisilicon/clk.c.

Thank you!

Regards,
Jiancheng
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hi3519-crg.txt
new file mode 100644
index 0000000..acd1f23
--- /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@12010000 {
+	compatible = "hisilicon,hi3519-crg";
+	reg = <0x12010000 0x10000>;
+	#clock-cells = <1>;
+	#reset-cells = <2>;
+};
+
+Example: consumer nodes
+i2c0: i2c@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..3f537a0 100644
--- a/drivers/clk/hisilicon/Kconfig
+++ b/drivers/clk/hisilicon/Kconfig
@@ -1,3 +1,11 @@ 
+config COMMON_CLK_HI3519
+	tristate "Hi3519 Clock Driver"
+	depends on ARCH_HISI || COMPILE_TEST
+	select RESET_HISI
+	default ARCH_HISI
+	help
+	  Build the clock driver for hi3519.
+
 config COMMON_CLK_HI6220
 	bool "Hi6220 Clock Driver"
 	depends on ARCH_HISI || COMPILE_TEST
@@ -5,6 +13,13 @@  config COMMON_CLK_HI6220
 	help
 	  Build the Hisilicon Hi6220 clock driver based on the common clock framework.
 
+config RESET_HISI
+	bool "HiSilicon Reset Controller Driver"
+	depends on ARCH_HISI || COMPILE_TEST
+	select RESET_CONTROLLER
+	help
+	  Build reset controller driver for HiSilicon device chipsets.
+
 config STUB_CLK_HI6220
 	bool "Hi6220 Stub Clock Driver"
 	depends on COMMON_CLK_HI6220 && MAILBOX
diff --git a/drivers/clk/hisilicon/Makefile b/drivers/clk/hisilicon/Makefile
index 74dba31..e169ec7 100644
--- a/drivers/clk/hisilicon/Makefile
+++ b/drivers/clk/hisilicon/Makefile
@@ -7,5 +7,7 @@  obj-y	+= clk.o clkgate-separated.o clkdivider-hi6220.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_HI3519)	+= clk-hi3519.o
 obj-$(CONFIG_COMMON_CLK_HI6220)	+= clk-hi6220.o
+obj-$(CONFIG_RESET_HISI)	+= reset.o
 obj-$(CONFIG_STUB_CLK_HI6220)	+= clk-hi6220-stub.o
diff --git a/drivers/clk/hisilicon/clk-hi3519.c b/drivers/clk/hisilicon/clk-hi3519.c
new file mode 100644
index 0000000..ee9df82
--- /dev/null
+++ b/drivers/clk/hisilicon/clk-hi3519.c
@@ -0,0 +1,129 @@ 
+/*
+ * 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/module.h>
+#include <linux/platform_device.h>
+#include "clk.h"
+#include "reset.h"
+
+#define HI3519_INNER_CLK_OFFSET	64
+#define HI3519_FIXED_24M	65
+#define HI3519_FIXED_50M	66
+#define HI3519_FIXED_75M	67
+#define HI3519_FIXED_125M	68
+#define HI3519_FIXED_150M	69
+#define HI3519_FIXED_200M	70
+#define HI3519_FIXED_250M	71
+#define HI3519_FIXED_300M	72
+#define HI3519_FIXED_400M	73
+#define HI3519_FMC_MUX		74
+
+#define HI3519_NR_CLKS		128
+
+static const struct hisi_fixed_rate_clock hi3519_fixed_rate_clks[] = {
+	{ 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 *const fmc_mux_p[] = {
+		"24m", "75m", "125m", "150m", "200m", "250m", "300m", "400m", };
+static u32 fmc_mux_table[] = {0, 1, 2, 3, 4, 5, 6, 7};
+
+static const struct hisi_mux_clock hi3519_mux_clks[] = {
+	{ 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 const struct hisi_gate_clock hi3519_gate_clks[] = {
+	{ HI3519_FMC_CLK, "clk_fmc", "fmc_mux",
+		CLK_SET_RATE_PARENT, 0xc0, 1, 0, },
+	{ 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 int hi3519_clk_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct hisi_clock_data *clk_data;
+
+	clk_data = hisi_clk_init(np, HI3519_NR_CLKS);
+	if (!clk_data)
+		return -ENODEV;
+
+	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);
+
+	return hisi_reset_init(np);
+}
+
+static const struct of_device_id hi3519_clk_match_table[] = {
+	{ .compatible = "hisilicon,hi3519-crg" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, hi3519_clk_match_table);
+
+static struct platform_driver hi3519_clk_driver = {
+	.probe          = hi3519_clk_probe,
+	.driver         = {
+		.name   = "hi3519-clk",
+		.of_match_table = hi3519_clk_match_table,
+	},
+};
+
+static int __init hi3519_clk_init(void)
+{
+	return platform_driver_register(&hi3519_clk_driver);
+}
+core_initcall(hi3519_clk_init);
+
+static void __exit hi3519_clk_exit(void)
+{
+	platform_driver_unregister(&hi3519_clk_driver);
+}
+module_exit(hi3519_clk_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver");
diff --git a/drivers/clk/hisilicon/reset.c b/drivers/clk/hisilicon/reset.c
new file mode 100644
index 0000000..8035366
--- /dev/null
+++ b/drivers/clk/hisilicon/reset.c
@@ -0,0 +1,124 @@ 
+/*
+ * 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/io.h>
+#include <linux/of_address.h>
+#include <linux/reset-controller.h>
+#include <linux/slab.h>
+#include <linux/spinlock.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 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);
+}
+EXPORT_SYMBOL_GPL(hisi_reset_init);
diff --git a/drivers/clk/hisilicon/reset.h b/drivers/clk/hisilicon/reset.h
new file mode 100644
index 0000000..ffad4d7
--- /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
+
+struct device_node;
+
+#ifdef CONFIG_RESET_CONTROLLER
+int hisi_reset_init(struct device_node *np);
+#else
+static inline int 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..14f4d21
--- /dev/null
+++ b/include/dt-bindings/clock/hi3519-clock.h
@@ -0,0 +1,40 @@ 
+/*
+ * 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_FMC_CLK			1
+#define HI3519_SPI0_CLK			2
+#define HI3519_SPI1_CLK			3
+#define HI3519_SPI2_CLK			4
+#define HI3519_UART0_CLK		5
+#define HI3519_UART1_CLK		6
+#define HI3519_UART2_CLK		7
+#define HI3519_UART3_CLK		8
+#define HI3519_UART4_CLK		9
+#define HI3519_PWM_CLK			10
+#define HI3519_DMA_CLK			11
+#define HI3519_IR_CLK			12
+#define HI3519_ETH_PHY_CLK		13
+#define HI3519_ETH_MAC_CLK		14
+#define HI3519_ETH_MACIF_CLK		15
+#define HI3519_USB2_BUS_CLK		16
+#define HI3519_USB2_PORT_CLK		17
+#define HI3519_USB3_CLK			18
+
+#endif	/* __DTS_HI3519_CLOCK_H */