From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754165AbcAHC3t (ORCPT ); Thu, 7 Jan 2016 21:29:49 -0500 Received: from szxga03-in.huawei.com ([119.145.14.66]:60266 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754037AbcAHC3m (ORCPT ); Thu, 7 Jan 2016 21:29:42 -0500 From: Jiancheng Xue To: , , , , , , , , , , , , , , , CC: , , , , , , , , , , , Jiancheng Xue Subject: [PATCH v5 1/6] clk: hisilicon: add CRG driver for hi3519 soc Date: Fri, 8 Jan 2016 10:16:35 +0800 Message-ID: <1452219400-32478-2-git-send-email-xuejiancheng@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1452219400-32478-1-git-send-email-xuejiancheng@huawei.com> References: <1452219400-32478-1-git-send-email-xuejiancheng@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.212.71] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020205.568F1F0B.0069,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 14c73595f0a39dba46929e31fa872496 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The CRG(Clock and Reset Generator) block provides clock and reset signals for other modules in hi3519 soc. Signed-off-by: Jiancheng Xue --- .../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 . + +- #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..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 . + */ + +#include +#include +#include +#include +#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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 . + */ + +#ifndef __HISI_RESET_H +#define __HISI_RESET_H + +#include + +#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 . + */ + +#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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiancheng Xue Subject: [PATCH v5 1/6] clk: hisilicon: add CRG driver for hi3519 soc Date: Fri, 8 Jan 2016 10:16:35 +0800 Message-ID: <1452219400-32478-2-git-send-email-xuejiancheng@huawei.com> References: <1452219400-32478-1-git-send-email-xuejiancheng@huawei.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1452219400-32478-1-git-send-email-xuejiancheng@huawei.com> Sender: linux-kernel-owner@vger.kernel.org To: mturquette@baylibre.com, sboyd@codeaurora.org, p.zabel@pengutronix.de, robh+dt@kernel.org, pawel.moll@arm.com, mark.rutland@arm.com, ijc+devicetree@hellion.org.uk, galak@codeaurora.org, linux@arm.linux.org.uk, khilman@linaro.org, arnd@arndb.de, olof@lixom.net, xuwei5@hisilicon.com, haojian.zhuang@linaro.org, zhangfei.gao@linaro.org, bintian.wang@huawei.com Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, yanhaifeng@hisilicon.com, yanghongwei@hisilicon.com, suwenping@hisilicon.com, ml.yang@hisilicon.com, gaofei@hisilicon.com, zhangzhenxing@hisilicon.com, xuejiancheng@hisilicon.com, Jiancheng Xue List-Id: devicetree@vger.kernel.org The CRG(Clock and Reset Generator) block provides clock and reset signals for other modules in hi3519 soc. Signed-off-by: Jiancheng Xue --- .../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 . + +- #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..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 . + */ + +#include +#include +#include +#include +#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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 . + */ + +#ifndef __HISI_RESET_H +#define __HISI_RESET_H + +#include + +#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 . + */ + +#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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: xuejiancheng@huawei.com (Jiancheng Xue) Date: Fri, 8 Jan 2016 10:16:35 +0800 Subject: [PATCH v5 1/6] clk: hisilicon: add CRG driver for hi3519 soc In-Reply-To: <1452219400-32478-1-git-send-email-xuejiancheng@huawei.com> References: <1452219400-32478-1-git-send-email-xuejiancheng@huawei.com> Message-ID: <1452219400-32478-2-git-send-email-xuejiancheng@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The CRG(Clock and Reset Generator) block provides clock and reset signals for other modules in hi3519 soc. Signed-off-by: Jiancheng Xue --- .../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 . + +- #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 . + */ + +#include +#include +#include +#include +#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 . + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 . + */ + +#ifndef __HISI_RESET_H +#define __HISI_RESET_H + +#include + +#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 . + */ + +#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