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author | Jiancheng Xue <xuejiancheng@hisilicon.com> | 2016-04-23 15:40:30 +0800 |
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committer | Stephen Boyd <sboyd@codeaurora.org> | 2016-05-06 11:13:32 -0700 |
commit | 6c9da387c8d5c5254857d2782bd6c314226f4f27 (patch) | |
tree | 3189ede959921db199f190d8aed8b8ab2fde692a | |
parent | f6ff57c8abde68c0bb8e0d4539f4204fc5ba45ae (diff) | |
download | linux-next-6c9da387c8d5c5254857d2782bd6c314226f4f27.tar.gz |
clk: hisilicon: add CRG driver for hi3519 soc
The CRG(Clock and Reset Generator) block provides clock
and reset signals for other modules in hi3519 soc.
Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
-rw-r--r-- | Documentation/devicetree/bindings/clock/hi3519-crg.txt | 46 | ||||
-rw-r--r-- | drivers/clk/hisilicon/Kconfig | 8 | ||||
-rw-r--r-- | drivers/clk/hisilicon/Makefile | 1 | ||||
-rw-r--r-- | drivers/clk/hisilicon/clk-hi3519.c | 131 | ||||
-rw-r--r-- | include/dt-bindings/clock/hi3519-clock.h | 40 |
5 files changed, 226 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/hi3519-crg.txt b/Documentation/devicetree/bindings/clock/hi3519-crg.txt new file mode 100644 index 000000000000..acd1f235d548 --- /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 3cd349c728e9..3f537a04c6a6 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 diff --git a/drivers/clk/hisilicon/Makefile b/drivers/clk/hisilicon/Makefile index c03775350e63..e169ec7da023 100644 --- a/drivers/clk/hisilicon/Makefile +++ b/drivers/clk/hisilicon/Makefile @@ -7,6 +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 000000000000..715c7301a66a --- /dev/null +++ b/drivers/clk/hisilicon/clk-hi3519.c @@ -0,0 +1,131 @@ +/* + * 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/clk-provider.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, 0, 24000000, }, + { HI3519_FIXED_50M, "50m", NULL, 0, 50000000, }, + { HI3519_FIXED_75M, "75m", NULL, 0, 75000000, }, + { HI3519_FIXED_125M, "125m", NULL, 0, 125000000, }, + { HI3519_FIXED_150M, "150m", NULL, 0, 150000000, }, + { HI3519_FIXED_200M, "200m", NULL, 0, 200000000, }, + { HI3519_FIXED_250M, "250m", NULL, 0, 250000000, }, + { HI3519_FIXED_300M, "300m", NULL, 0, 300000000, }, + { HI3519_FIXED_400M, "400m", NULL, 0, 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; + struct hisi_reset_controller *rstc; + + rstc = hisi_reset_init(np); + if (!rstc) + return -ENOMEM; + + clk_data = hisi_clk_init(np, HI3519_NR_CLKS); + if (!clk_data) { + hisi_reset_exit(rstc); + 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 0; +} + +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); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("HiSilicon Hi3519 Clock Driver"); diff --git a/include/dt-bindings/clock/hi3519-clock.h b/include/dt-bindings/clock/hi3519-clock.h new file mode 100644 index 000000000000..14f4d2184e5a --- /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 */ |