diff mbox

[v2] clk: hisilicon: add CRG driver for Hi3798CV200 SoC

Message ID 1474183821-7570-1-git-send-email-xuejiancheng@hisilicon.com
State Superseded
Headers show

Commit Message

Jiancheng Xue Sept. 18, 2016, 7:30 a.m. UTC
Add CRG driver for Hi3798CV200 SoC. CRG(Clock and Reset
Generator) module generates clock and reset signals used
by other module blocks on SoC.

Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>

---
change log
v2:
- Fixed compiling error when compiled as a module.
- Fixed issues pointed by Stephen Boyd.
- Added prefix HISTB for clock index macro definitions.

 .../clock/{hi3519-crg.txt => hisi-crg.txt}         |  11 +-
 drivers/clk/hisilicon/Kconfig                      |   8 +
 drivers/clk/hisilicon/Makefile                     |   1 +
 drivers/clk/hisilicon/crg-hi3798cv200.c            | 305 +++++++++++++++++++++
 drivers/clk/hisilicon/crg.h                        |  34 +++
 include/dt-bindings/clock/histb-clock.h            |  64 +++++
 6 files changed, 419 insertions(+), 4 deletions(-)
 rename Documentation/devicetree/bindings/clock/{hi3519-crg.txt => hisi-crg.txt} (82%)
 create mode 100644 drivers/clk/hisilicon/crg-hi3798cv200.c
 create mode 100644 drivers/clk/hisilicon/crg.h
 create mode 100644 include/dt-bindings/clock/histb-clock.h

-- 
1.9.1

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Comments

Rob Herring (Arm) Sept. 23, 2016, 5:47 p.m. UTC | #1
On Sun, Sep 18, 2016 at 03:30:21PM +0800, Jiancheng Xue wrote:
> Add CRG driver for Hi3798CV200 SoC. CRG(Clock and Reset

> Generator) module generates clock and reset signals used

> by other module blocks on SoC.

> 

> Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>

> ---

> change log

> v2:

> - Fixed compiling error when compiled as a module.

> - Fixed issues pointed by Stephen Boyd.

> - Added prefix HISTB for clock index macro definitions.

> 

>  .../clock/{hi3519-crg.txt => hisi-crg.txt}         |  11 +-

>  drivers/clk/hisilicon/Kconfig                      |   8 +

>  drivers/clk/hisilicon/Makefile                     |   1 +

>  drivers/clk/hisilicon/crg-hi3798cv200.c            | 305 +++++++++++++++++++++

>  drivers/clk/hisilicon/crg.h                        |  34 +++

>  include/dt-bindings/clock/histb-clock.h            |  64 +++++

>  6 files changed, 419 insertions(+), 4 deletions(-)

>  rename Documentation/devicetree/bindings/clock/{hi3519-crg.txt => hisi-crg.txt} (82%)

>  create mode 100644 drivers/clk/hisilicon/crg-hi3798cv200.c

>  create mode 100644 drivers/clk/hisilicon/crg.h

>  create mode 100644 include/dt-bindings/clock/histb-clock.h

> 

> diff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hisi-crg.txt

> similarity index 82%

> rename from Documentation/devicetree/bindings/clock/hi3519-crg.txt

> rename to Documentation/devicetree/bindings/clock/hisi-crg.txt

> index acd1f23..e3919b6 100644

> --- a/Documentation/devicetree/bindings/clock/hi3519-crg.txt

> +++ b/Documentation/devicetree/bindings/clock/hisi-crg.txt

> @@ -1,7 +1,7 @@

> -* Hisilicon Hi3519 Clock and Reset Generator(CRG)

> +* HiSilicon Clock and Reset Generator(CRG)

>  

> -The Hi3519 CRG module provides clock and reset signals to various

> -controllers within the SoC.

> +The CRG module provides clock and reset signals to various

> +modules within the SoC.

>  

>  This binding uses the following bindings:

>      Documentation/devicetree/bindings/clock/clock-bindings.txt

> @@ -10,7 +10,10 @@ This binding uses the following bindings:

>  Required Properties:

>  

>  - compatible: should be one of the following.

> -  - "hisilicon,hi3519-crg" - controller compatible with Hi3519 SoC.

> +  - "hisilicon,hi3516cv300-crg"

> +  - "hisilicon,hi3519-crg"

> +  - "hisilicon,hi3798cv200-crg"

> +  - "hisilicon,hi3798cv200-sysctrl"


Why crg and sysctrl?

>  

>  - reg: physical base address of the controller and length of memory mapped

>    region.

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Jiancheng Xue Sept. 24, 2016, 1:45 a.m. UTC | #2
在 2016/9/24 1:47, Rob Herring 写道:
> On Sun, Sep 18, 2016 at 03:30:21PM +0800, Jiancheng Xue wrote:

>> Add CRG driver for Hi3798CV200 SoC. CRG(Clock and Reset

>> Generator) module generates clock and reset signals used

>> by other module blocks on SoC.

>>

>> Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>

>> ---

>> change log

>> v2:

>> - Fixed compiling error when compiled as a module.

>> - Fixed issues pointed by Stephen Boyd.

>> - Added prefix HISTB for clock index macro definitions.

>>

>>  .../clock/{hi3519-crg.txt => hisi-crg.txt}         |  11 +-

>>  drivers/clk/hisilicon/Kconfig                      |   8 +

>>  drivers/clk/hisilicon/Makefile                     |   1 +

>>  drivers/clk/hisilicon/crg-hi3798cv200.c            | 305 +++++++++++++++++++++

>>  drivers/clk/hisilicon/crg.h                        |  34 +++

>>  include/dt-bindings/clock/histb-clock.h            |  64 +++++

>>  6 files changed, 419 insertions(+), 4 deletions(-)

>>  rename Documentation/devicetree/bindings/clock/{hi3519-crg.txt => hisi-crg.txt} (82%)

>>  create mode 100644 drivers/clk/hisilicon/crg-hi3798cv200.c

>>  create mode 100644 drivers/clk/hisilicon/crg.h

>>  create mode 100644 include/dt-bindings/clock/histb-clock.h

>>

>> diff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hisi-crg.txt

>> similarity index 82%

>> rename from Documentation/devicetree/bindings/clock/hi3519-crg.txt

>> rename to Documentation/devicetree/bindings/clock/hisi-crg.txt

>> index acd1f23..e3919b6 100644

>> --- a/Documentation/devicetree/bindings/clock/hi3519-crg.txt

>> +++ b/Documentation/devicetree/bindings/clock/hisi-crg.txt

>> @@ -1,7 +1,7 @@

>> -* Hisilicon Hi3519 Clock and Reset Generator(CRG)

>> +* HiSilicon Clock and Reset Generator(CRG)

>>  

>> -The Hi3519 CRG module provides clock and reset signals to various

>> -controllers within the SoC.

>> +The CRG module provides clock and reset signals to various

>> +modules within the SoC.

>>  

>>  This binding uses the following bindings:

>>      Documentation/devicetree/bindings/clock/clock-bindings.txt

>> @@ -10,7 +10,10 @@ This binding uses the following bindings:

>>  Required Properties:

>>  

>>  - compatible: should be one of the following.

>> -  - "hisilicon,hi3519-crg" - controller compatible with Hi3519 SoC.

>> +  - "hisilicon,hi3516cv300-crg"

>> +  - "hisilicon,hi3519-crg"

>> +  - "hisilicon,hi3798cv200-crg"

>> +  - "hisilicon,hi3798cv200-sysctrl"

> 

> Why crg and sysctrl?

> 

Hi Rob,

In Hi3798cv200 SoC, the system controller (sysctrl) is another clock
provider which provides clocks for some modules such as timer0, uart0,
ir, led etc. These modules won't be power down when the system enters
into the stand-by mode. Besides providing above clocks, sysctrl also
contains registers used to control the whole system and some peripherals.

Thanks,
Jiancheng

>>  

>>  - reg: physical base address of the controller and length of memory mapped

>>    region.

> 

> .

> 


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diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hisi-crg.txt
similarity index 82%
rename from Documentation/devicetree/bindings/clock/hi3519-crg.txt
rename to Documentation/devicetree/bindings/clock/hisi-crg.txt
index acd1f23..e3919b6 100644
--- a/Documentation/devicetree/bindings/clock/hi3519-crg.txt
+++ b/Documentation/devicetree/bindings/clock/hisi-crg.txt
@@ -1,7 +1,7 @@ 
-* Hisilicon Hi3519 Clock and Reset Generator(CRG)
+* HiSilicon Clock and Reset Generator(CRG)
 
-The Hi3519 CRG module provides clock and reset signals to various
-controllers within the SoC.
+The CRG module provides clock and reset signals to various
+modules within the SoC.
 
 This binding uses the following bindings:
     Documentation/devicetree/bindings/clock/clock-bindings.txt
@@ -10,7 +10,10 @@  This binding uses the following bindings:
 Required Properties:
 
 - compatible: should be one of the following.
-  - "hisilicon,hi3519-crg" - controller compatible with Hi3519 SoC.
+  - "hisilicon,hi3516cv300-crg"
+  - "hisilicon,hi3519-crg"
+  - "hisilicon,hi3798cv200-crg"
+  - "hisilicon,hi3798cv200-sysctrl"
 
 - reg: physical base address of the controller and length of memory mapped
   region.
diff --git a/drivers/clk/hisilicon/Kconfig b/drivers/clk/hisilicon/Kconfig
index 3f537a0..c41b6d2 100644
--- a/drivers/clk/hisilicon/Kconfig
+++ b/drivers/clk/hisilicon/Kconfig
@@ -6,6 +6,14 @@  config COMMON_CLK_HI3519
 	help
 	  Build the clock driver for hi3519.
 
+config COMMON_CLK_HI3798CV200
+	tristate "Hi3798CV200 Clock Driver"
+	depends on ARCH_HISI || COMPILE_TEST
+	select RESET_HISI
+	default ARCH_HISI
+	help
+	  Build the clock driver for hi3798cv200.
+
 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 e169ec7..5819891 100644
--- a/drivers/clk/hisilicon/Makefile
+++ b/drivers/clk/hisilicon/Makefile
@@ -8,6 +8,7 @@  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-$(CONFIG_COMMON_CLK_HI3798CV200)	+= crg-hi3798cv200.o
 obj-$(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/crg-hi3798cv200.c b/drivers/clk/hisilicon/crg-hi3798cv200.c
new file mode 100644
index 0000000..f8534bb
--- /dev/null
+++ b/drivers/clk/hisilicon/crg-hi3798cv200.c
@@ -0,0 +1,305 @@ 
+/*
+ * Hi3798CV200 Clock and Reset Generator Driver
+ *
+ * Copyright (c) 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/histb-clock.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include "clk.h"
+#include "crg.h"
+#include "reset.h"
+
+/* hi3798CV200 core CRG */
+#define HI3798CV200_INNER_CLK_OFFSET	64
+#define HI3798CV200_FIXED_24M	65
+#define HI3798CV200_FIXED_25M	66
+#define HI3798CV200_FIXED_50M	67
+#define HI3798CV200_FIXED_75M	68
+#define HI3798CV200_FIXED_100M	69
+#define HI3798CV200_FIXED_150M	70
+#define HI3798CV200_FIXED_200M	71
+#define HI3798CV200_FIXED_250M	72
+#define HI3798CV200_FIXED_300M	73
+#define HI3798CV200_FIXED_400M	74
+#define HI3798CV200_MMC_MUX	75
+
+#define HI3798CV200_CRG_NR_CLKS		128
+
+static const struct hisi_fixed_rate_clock hi3798cv200_fixed_rate_clks[] = {
+	{ HISTB_OSC_CLK, "clk_osc", NULL, 0, 24000000, },
+	{ HISTB_APB_CLK, "clk_apb", NULL, 0, 100000000, },
+	{ HISTB_AHB_CLK, "clk_ahb", NULL, 0, 200000000, },
+	{ HI3798CV200_FIXED_24M, "24m", NULL, 0, 24000000, },
+	{ HI3798CV200_FIXED_25M, "25m", NULL, 0, 25000000, },
+	{ HI3798CV200_FIXED_50M, "50m", NULL, 0, 50000000, },
+	{ HI3798CV200_FIXED_75M, "75m", NULL, 0, 75000000, },
+	{ HI3798CV200_FIXED_100M, "100m", NULL, 0, 100000000, },
+	{ HI3798CV200_FIXED_150M, "150m", NULL, 0, 150000000, },
+	{ HI3798CV200_FIXED_200M, "200m", NULL, 0, 200000000, },
+	{ HI3798CV200_FIXED_250M, "250m", NULL, 0, 250000000, },
+};
+
+static const char *const mmc_mux_p[] = {
+		"100m", "50m", "25m", "200m", "150m" };
+static u32 mmc_mux_table[] = {0, 1, 2, 3, 6};
+
+static struct hisi_mux_clock hi3798cv200_mux_clks[] = {
+	{ HI3798CV200_MMC_MUX, "mmc_mux", mmc_mux_p, ARRAY_SIZE(mmc_mux_p),
+		CLK_SET_RATE_PARENT, 0xa0, 8, 3, 0, mmc_mux_table, },
+};
+
+static const struct hisi_gate_clock hi3798cv200_gate_clks[] = {
+	/* UART */
+	{ HISTB_UART2_CLK, "clk_uart2", "75m",
+		CLK_SET_RATE_PARENT, 0x68, 4, 0, },
+	/* I2C */
+	{ HISTB_I2C0_CLK, "clk_i2c0", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 4, 0, },
+	{ HISTB_I2C1_CLK, "clk_i2c1", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 8, 0, },
+	{ HISTB_I2C2_CLK, "clk_i2c2", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 12, 0, },
+	{ HISTB_I2C3_CLK, "clk_i2c3", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 16, 0, },
+	{ HISTB_I2C4_CLK, "clk_i2c4", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x6C, 20, 0, },
+	/* SPI */
+	{ HISTB_SPI0_CLK, "clk_spi0", "clk_apb",
+		CLK_SET_RATE_PARENT, 0x70, 0, 0, },
+	/* SDIO */
+	{ HISTB_SDIO0_BIU_CLK, "clk_sdio0_biu", "200m",
+			CLK_SET_RATE_PARENT, 0x9c, 0, 0, },
+	{ HISTB_SDIO0_CIU_CLK, "clk_sdio0_ciu", "mmc_mux",
+		CLK_SET_RATE_PARENT, 0x9c, 1, 0, },
+	/* EMMC */
+	{ HISTB_MMC_BIU_CLK, "clk_mmc_biu", "200m",
+		CLK_SET_RATE_PARENT, 0xa0, 0, 0, },
+	{ HISTB_MMC_CIU_CLK, "clk_mmc_ciu", "mmc_mux",
+		CLK_SET_RATE_PARENT, 0xa0, 1, 0, },
+	/* PCIE*/
+	{ HISTB_PCIE_BUS_CLK, "clk_pcie_bus", "200m",
+		CLK_SET_RATE_PARENT, 0x18c, 0, 0, },
+	{ HISTB_PCIE_SYS_CLK, "clk_pcie_sys", "100m",
+		CLK_SET_RATE_PARENT, 0x18c, 1, 0, },
+	{ HISTB_PCIE_PIPE_CLK, "clk_pcie_pipe", "250m",
+		CLK_SET_RATE_PARENT, 0x18c, 2, 0, },
+	{ HISTB_PCIE_AUX_CLK, "clk_pcie_aux", "24m",
+		CLK_SET_RATE_PARENT, 0x18c, 3, 0, },
+};
+
+static struct hisi_clock_data *hi3798cv200_clk_register(
+				struct platform_device *pdev)
+{
+	struct hisi_clock_data *clk_data;
+	int ret;
+
+	clk_data = hisi_clk_alloc(pdev, HI3798CV200_CRG_NR_CLKS);
+	if (!clk_data)
+		return ERR_PTR(-ENOMEM);
+
+	ret = hisi_clk_register_fixed_rate(hi3798cv200_fixed_rate_clks,
+				     ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
+				     clk_data);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ret = hisi_clk_register_mux(hi3798cv200_mux_clks,
+				ARRAY_SIZE(hi3798cv200_mux_clks),
+				clk_data);
+	if (ret)
+		goto unregister_fixed_rate;
+
+	ret = hisi_clk_register_gate(hi3798cv200_gate_clks,
+				ARRAY_SIZE(hi3798cv200_gate_clks),
+				clk_data);
+	if (ret)
+		goto unregister_mux;
+
+	ret = of_clk_add_provider(pdev->dev.of_node,
+			of_clk_src_onecell_get, &clk_data->clk_data);
+	if (ret)
+		goto unregister_gate;
+
+	return clk_data;
+
+unregister_fixed_rate:
+	hisi_clk_unregister_fixed_rate(hi3798cv200_fixed_rate_clks,
+				ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
+				clk_data);
+
+unregister_mux:
+	hisi_clk_unregister_mux(hi3798cv200_mux_clks,
+				ARRAY_SIZE(hi3798cv200_mux_clks),
+				clk_data);
+unregister_gate:
+	hisi_clk_unregister_gate(hi3798cv200_gate_clks,
+				ARRAY_SIZE(hi3798cv200_gate_clks),
+				clk_data);
+	return ERR_PTR(ret);
+}
+
+static void hi3798cv200_clk_unregister(struct platform_device *pdev)
+{
+	struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
+
+	of_clk_del_provider(pdev->dev.of_node);
+
+	hisi_clk_unregister_gate(hi3798cv200_gate_clks,
+				ARRAY_SIZE(hi3798cv200_gate_clks),
+				crg->clk_data);
+	hisi_clk_unregister_mux(hi3798cv200_mux_clks,
+				ARRAY_SIZE(hi3798cv200_mux_clks),
+				crg->clk_data);
+	hisi_clk_unregister_fixed_rate(hi3798cv200_fixed_rate_clks,
+				ARRAY_SIZE(hi3798cv200_fixed_rate_clks),
+				crg->clk_data);
+}
+
+static const struct hisi_crg_funcs hi3798cv200_crg_funcs = {
+	.register_clks = hi3798cv200_clk_register,
+	.unregister_clks = hi3798cv200_clk_unregister,
+};
+
+/* hi3798CV200 sysctrl CRG */
+
+#define HI3798CV200_SYSCTRL_NR_CLKS 16
+
+static const struct hisi_gate_clock hi3798cv200_sysctrl_gate_clks[] = {
+	{ HISTB_IR_CLK, "clk_ir", "100m",
+		CLK_SET_RATE_PARENT, 0x48, 4, 0, },
+	{ HISTB_TIMER01_CLK, "clk_timer01", "24m",
+		CLK_SET_RATE_PARENT, 0x48, 6, 0, },
+	{ HISTB_UART0_CLK, "clk_uart0", "75m",
+		CLK_SET_RATE_PARENT, 0x48, 10, 0, },
+};
+
+static struct hisi_clock_data *hi3798cv200_sysctrl_clk_register(
+					struct platform_device *pdev)
+{
+	struct hisi_clock_data *clk_data;
+	int ret;
+
+	clk_data = hisi_clk_alloc(pdev, HI3798CV200_SYSCTRL_NR_CLKS);
+	if (!clk_data)
+		return ERR_PTR(-ENOMEM);
+
+	ret = hisi_clk_register_gate(hi3798cv200_sysctrl_gate_clks,
+				ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
+				clk_data);
+	if (ret)
+		return ERR_PTR(ret);
+
+	ret = of_clk_add_provider(pdev->dev.of_node,
+			of_clk_src_onecell_get, &clk_data->clk_data);
+	if (ret)
+		goto unregister_gate;
+
+	return clk_data;
+
+unregister_gate:
+	hisi_clk_unregister_gate(hi3798cv200_sysctrl_gate_clks,
+				ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
+				clk_data);
+	return ERR_PTR(ret);
+}
+
+static void hi3798cv200_sysctrl_clk_unregister(struct platform_device *pdev)
+{
+	struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
+
+	of_clk_del_provider(pdev->dev.of_node);
+
+	hisi_clk_unregister_gate(hi3798cv200_sysctrl_gate_clks,
+				ARRAY_SIZE(hi3798cv200_sysctrl_gate_clks),
+				crg->clk_data);
+}
+
+static const struct hisi_crg_funcs hi3798cv200_sysctrl_funcs = {
+	.register_clks = hi3798cv200_sysctrl_clk_register,
+	.unregister_clks = hi3798cv200_sysctrl_clk_unregister,
+};
+
+static const struct of_device_id hi3798cv200_crg_match_table[] = {
+	{ .compatible = "hisilicon,hi3798cv200-crg",
+		.data = &hi3798cv200_crg_funcs },
+	{ .compatible = "hisilicon,hi3798cv200-sysctrl",
+		.data = &hi3798cv200_sysctrl_funcs },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, hi3798cv200_crg_match_table);
+
+static int hi3798cv200_crg_probe(struct platform_device *pdev)
+{
+	struct hisi_crg_dev *crg;
+
+	crg = devm_kmalloc(&pdev->dev, sizeof(*crg), GFP_KERNEL);
+	if (!crg)
+		return -ENOMEM;
+
+	crg->funcs = of_device_get_match_data(&pdev->dev);
+	if (!crg->funcs)
+		return -ENOENT;
+
+	crg->rstc = hisi_reset_init(pdev);
+	if (!crg->rstc)
+		return -ENOMEM;
+
+	crg->clk_data = crg->funcs->register_clks(pdev);
+	if (IS_ERR(crg->clk_data)) {
+		hisi_reset_exit(crg->rstc);
+		return PTR_ERR(crg->clk_data);
+	}
+
+	platform_set_drvdata(pdev, crg);
+	return 0;
+}
+
+static int hi3798cv200_crg_remove(struct platform_device *pdev)
+{
+	struct hisi_crg_dev *crg = platform_get_drvdata(pdev);
+
+	hisi_reset_exit(crg->rstc);
+	crg->funcs->unregister_clks(pdev);
+	return 0;
+}
+
+static struct platform_driver hi3798cv200_crg_driver = {
+	.probe          = hi3798cv200_crg_probe,
+	.remove		= hi3798cv200_crg_remove,
+	.driver         = {
+		.name   = "hi3798cv200-crg",
+		.of_match_table = hi3798cv200_crg_match_table,
+	},
+};
+
+static int __init hi3798cv200_crg_init(void)
+{
+	return platform_driver_register(&hi3798cv200_crg_driver);
+}
+core_initcall(hi3798cv200_crg_init);
+
+static void __exit hi3798cv200_crg_exit(void)
+{
+	platform_driver_unregister(&hi3798cv200_crg_driver);
+}
+module_exit(hi3798cv200_crg_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("HiSilicon Hi3798CV200 CRG Driver");
diff --git a/drivers/clk/hisilicon/crg.h b/drivers/clk/hisilicon/crg.h
new file mode 100644
index 0000000..e073971
--- /dev/null
+++ b/drivers/clk/hisilicon/crg.h
@@ -0,0 +1,34 @@ 
+/*
+ * HiSilicon Clock and Reset Driver Header
+ *
+ * Copyright (c) 2016 HiSilicon Limited.
+ *
+ * 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.
+ */
+
+#ifndef __HISI_CRG_H
+#define __HISI_CRG_H
+
+struct hisi_clock_data;
+struct hisi_reset_controller;
+
+struct hisi_crg_funcs {
+	struct hisi_clock_data*	(*register_clks)(struct platform_device *pdev);
+	void (*unregister_clks)(struct platform_device *pdev);
+};
+
+struct hisi_crg_dev {
+	struct hisi_clock_data *clk_data;
+	struct hisi_reset_controller *rstc;
+	const struct hisi_crg_funcs *funcs;
+};
+
+#endif	/* __HISI_CRG_H */
diff --git a/include/dt-bindings/clock/histb-clock.h b/include/dt-bindings/clock/histb-clock.h
new file mode 100644
index 0000000..b06d115
--- /dev/null
+++ b/include/dt-bindings/clock/histb-clock.h
@@ -0,0 +1,64 @@ 
+/*
+ * Copyright (c) 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/>.
+ */
+
+#ifndef __DTS_HISTB_CLOCK_H
+#define __DTS_HISTB_CLOCK_H
+
+/* clocks provided by core CRG */
+#define HISTB_OSC_CLK			0
+#define HISTB_APB_CLK			1
+#define HISTB_AHB_CLK			2
+#define HISTB_UART1_CLK		3
+#define HISTB_UART2_CLK		4
+#define HISTB_UART3_CLK		5
+#define HISTB_I2C0_CLK		6
+#define HISTB_I2C1_CLK		7
+#define HISTB_I2C2_CLK		8
+#define HISTB_I2C3_CLK		9
+#define HISTB_I2C4_CLK		10
+#define HISTB_I2C5_CLK		11
+#define HISTB_SPI0_CLK		12
+#define HISTB_SPI1_CLK		13
+#define HISTB_SPI2_CLK		14
+#define HISTB_SCI_CLK			15
+#define HISTB_FMC_CLK			16
+#define HISTB_MMC_BIU_CLK		17
+#define HISTB_MMC_CIU_CLK		18
+#define HISTB_MMC_DRV_CLK		19
+#define HISTB_MMC_SAMPLE_CLK		20
+#define HISTB_SDIO0_BIU_CLK		21
+#define HISTB_SDIO0_CIU_CLK		22
+#define HISTB_SDIO0_DRV_CLK		23
+#define HISTB_SDIO0_SAMPLE_CLK	24
+#define HISTB_PCIE_AUX_CLK		25
+#define HISTB_PCIE_PIPE_CLK		26
+#define HISTB_PCIE_SYS_CLK		27
+#define HISTB_PCIE_BUS_CLK		28
+#define HISTB_ETH0_MAC_CLK		29
+#define HISTB_ETH0_MACIF_CLK		30
+#define HISTB_ETH1_MAC_CLK		31
+#define HISTB_ETH1_MACIF_CLK		32
+
+/* clocks provided by mcu CRG */
+#define HISTB_MCE_CLK	1
+#define HISTB_IR_CLK	2
+#define HISTB_TIMER01_CLK	3
+#define HISTB_LEDC_CLK	4
+#define HISTB_UART0_CLK	5
+#define HISTB_LSADC_CLK	6
+
+#endif	/* __DTS_HISTB_CLOCK_H */