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Date: Tue, 23 Sep 2014 20:44:35 +0800 Message-ID: <1411476275-9164-1-git-send-email-Li.Xiubo@freescale.com> X-Mailer: git-send-email 2.1.0.27.g96db324 X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:192.88.168.50; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(189002)(199003)(48376002)(95666004)(97736003)(105606002)(50466002)(62966002)(106466001)(90102001)(10300001)(80022003)(81542003)(74662003)(74502003)(85306004)(120916001)(76482002)(46102003)(36756003)(81342003)(77982003)(44976005)(79102003)(68736004)(83072002)(19580405001)(85852003)(83322001)(19580395003)(87936001)(87286001)(84676001)(99396002)(88136002)(229853001)(104016003)(77156001)(50986999)(89996001)(107046002)(92566001)(6806004)(93916002)(86362001)(92726001)(20776003)(31966008)(47776003)(64706001)(4396001)(21056001)(104166001)(50226001)(2004002)(2101003); DIR:OUT; SFP:1102; SCL:1; SRVR:BN1PR0301MB0610; H:tx30smr01.am.freescale.net; FPR:; MLV:sfv; PTR:InfoDomainNonexistent; MX:1; A:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BN1PR0301MB0610; X-Forefront-PRVS: 0343AC1D30 Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.168.50 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.168.50; helo=tx30smr01.am.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.168.50) smtp.mailfrom=Li.Xiubo@freescale.com; X-OriginatorOrg: freescale.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140923_054529_995952_677D2DC0 X-CRM114-Status: GOOD ( 15.32 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.0 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [157.56.110.108 listed in list.dnswl.org] -0.2 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [157.56.110.108 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.0 SPF_PASS SPF: sender matches SPF record Cc: mark.rutland@arm.com, Xiubo Li , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, u.kleine-koenig@pengutronix.de X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+incoming-imx=patchwork.ozlabs.org@lists.infradead.org List-Id: linux-imx-kernel.lists.patchwork.ozlabs.org A given application may not use all the peripherals on the device. In this case, it may be desirable to disable unused peripherals. DCFG provides a mechanism for gating clocks to IP blocks that are not used when running an application. Signed-off-by: Xiubo Li --- Change in V3: - Follow's Uwe Kleine-K?nig advices. .../devicetree/bindings/clock/ls1021a-clock.txt | 33 ++++ arch/arm/mach-imx/Makefile | 2 + arch/arm/mach-imx/clk-ls1021a.c | 200 +++++++++++++++++++++ arch/arm/mach-imx/clk.h | 8 + include/dt-bindings/clock/ls1021a-clock.h | 55 ++++++ 5 files changed, 298 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/ls1021a-clock.txt create mode 100644 arch/arm/mach-imx/clk-ls1021a.c create mode 100644 include/dt-bindings/clock/ls1021a-clock.h diff --git a/Documentation/devicetree/bindings/clock/ls1021a-clock.txt b/Documentation/devicetree/bindings/clock/ls1021a-clock.txt new file mode 100644 index 0000000..950e8d0 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/ls1021a-clock.txt @@ -0,0 +1,33 @@ +Gating clock bindings for Freescale LS1021A SOC + +Required properties: +- compatible: Should be "fsl,ls1021a-gate" +- reg: Address and length of the register set +- #clock-cells: Should be <1> + +Optional property: +- big-endian: If present the gate clock base registers are + implemented in big endian mode, otherwise in + little mode. + +The clock consumers should specify the desired clock by having one clock +ID in its "clocks" phandle cell. +Please see include/dt-bindings/clock/ls1021a-clock.h for the full list of +LS1021A clock IDs. + +Example: + +gate: gate@1ee0000 { + compatible = "fsl,ls1021a-gate"; + reg = <0x0 0x1ee0000 0x0 0x10000>; + #clock-cells = <1>; + big-endian; +}; + +wdog0: wdog@2ad0000 { + compatible = "fsl,ls1021a-wdt", "fsl,imx21-wdt"; + reg = <0x0 0x2ad0000 0x0 0x10000>; + interrupts = ; + clocks = <&gate LS1021A_CLK_WDOG12_EN>; + clock-names = "wdog12_en"; +}; diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile index 6e4fcd8..f6a1544 100644 --- a/arch/arm/mach-imx/Makefile +++ b/arch/arm/mach-imx/Makefile @@ -110,4 +110,6 @@ obj-$(CONFIG_SOC_IMX53) += mach-imx53.o obj-$(CONFIG_SOC_VF610) += clk-vf610.o mach-vf610.o +obj-$(CONFIG_SOC_LS1021A) += clk-ls1021a.o + obj-y += devices/ diff --git a/arch/arm/mach-imx/clk-ls1021a.c b/arch/arm/mach-imx/clk-ls1021a.c new file mode 100644 index 0000000..568b592 --- /dev/null +++ b/arch/arm/mach-imx/clk-ls1021a.c @@ -0,0 +1,200 @@ +/* + * Copyright 2014 Freescale Semiconductor, Inc. + * + * 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. + */ + +#include +#include +#include +#include +#include + +#include "clk.h" + +/* The DCFG registers are in big endian mode on LS1021A SoC */ +static u8 ls1021a_clk_shift_none(u8 shift) +{ + return shift; +} + +static u8 ls1021a_clk_shift_be(u8 shift) +{ + u8 m, n; + + m = shift / 8; + n = shift % 8; + + return (u8)((3 - m) * 8 + n); +} + +static u8 (*ls1021a_clk_shift)(u8 shift) = ls1021a_clk_shift_none; + +static void __init ls1021a_clocks_init(struct device_node *np) +{ + struct clk_onecell_data *clk_data; + struct clk **clks; + void __iomem *dcfg_base; + int i; + +#define DCFG_CCSR_DEVDISR1 (dcfg_base + 0x70) +#define DCFG_CCSR_DEVDISR2 (dcfg_base + 0x74) +#define DCFG_CCSR_DEVDISR3 (dcfg_base + 0x78) +#define DCFG_CCSR_DEVDISR4 (dcfg_base + 0x7c) +#define DCFG_CCSR_DEVDISR5 (dcfg_base + 0x80) +#define DCFG_CCSR_RSTRQMR1 (dcfg_base + 0xc0) + + clk_data = kzalloc(sizeof(struct clk_onecell_data), GFP_KERNEL); + clks = kcalloc(LS1021A_CLK_END, sizeof(struct clk *), GFP_KERNEL); + + BUG_ON(!clk_data || !clks); + + dcfg_base = of_iomap(np, 0); + + BUG_ON(!dcfg_base); + + if (of_property_read_bool(np, "big-endian")) + ls1021a_clk_shift = ls1021a_clk_shift_be; + + clks[LS1021A_CLK_PBL_EN] = ls1021a_clk_gate("pbl_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(0)); + clks[LS1021A_CLK_ESDHC_EN] = ls1021a_clk_gate("esdhc_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(2)); + clks[LS1021A_CLK_DMA1_EN] = ls1021a_clk_gate("dma1_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(8)); + clks[LS1021A_CLK_DMA2_EN] = ls1021a_clk_gate("dma2_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(9)); + clks[LS1021A_CLK_USB3_PHY_EN] = ls1021a_clk_gate("usb3_phy_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(12)); + clks[LS1021A_CLK_USB2_EN] = ls1021a_clk_gate("usb2_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(13)); + clks[LS1021A_CLK_SATA_EN] = ls1021a_clk_gate("sata_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(16)); + clks[LS1021A_CLK_USB3_EN] = ls1021a_clk_gate("usb3_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(17)); + clks[LS1021A_CLK_SEC_EN] = ls1021a_clk_gate("sec_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(22)); + clks[LS1021A_CLK_2D_ACE_EN] = ls1021a_clk_gate("2d_ace_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(30)); + clks[LS1021A_CLK_QE_EN] = ls1021a_clk_gate("qe_en", "dummy", + DCFG_CCSR_DEVDISR1, + ls1021a_clk_shift(31)); + + clks[LS1021A_CLK_ETSEC1_EN] = ls1021a_clk_gate("etsec1_en", "dummy", + DCFG_CCSR_DEVDISR2, + ls1021a_clk_shift(0)); + clks[LS1021A_CLK_ETSEC2_EN] = ls1021a_clk_gate("etsec2_en", "dummy", + DCFG_CCSR_DEVDISR2, + ls1021a_clk_shift(1)); + clks[LS1021A_CLK_ETSEC3_EN] = ls1021a_clk_gate("etsec3_en", "dummy", + DCFG_CCSR_DEVDISR2, + ls1021a_clk_shift(2)); + + clks[LS1021A_CLK_PEX1_EN] = ls1021a_clk_gate("pex1_en", "dummy", + DCFG_CCSR_DEVDISR3, + ls1021a_clk_shift(0)); + clks[LS1021A_CLK_PEX2_EN] = ls1021a_clk_gate("pex2_en", "dummy", + DCFG_CCSR_DEVDISR3, + ls1021a_clk_shift(1)); + + clks[LS1021A_CLK_DUART1_EN] = ls1021a_clk_gate("duart1_en", "dummy", + DCFG_CCSR_DEVDISR4, + ls1021a_clk_shift(2)); + clks[LS1021A_CLK_DUART2_EN] = ls1021a_clk_gate("duart2_en", "dummy", + DCFG_CCSR_DEVDISR4, + ls1021a_clk_shift(3)); + clks[LS1021A_CLK_QSPI_EN] = ls1021a_clk_gate("qspi_en", "dummy", + DCFG_CCSR_DEVDISR4, + ls1021a_clk_shift(4)); + + clks[LS1021A_CLK_DDR_EN] = ls1021a_clk_gate("ddr_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(0)); + clks[LS1021A_CLK_OCRAM1_EN] = ls1021a_clk_gate("ocram1_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(4)); + clks[LS1021A_CLK_IFC_EN] = ls1021a_clk_gate("ifc_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(8)); + clks[LS1021A_CLK_GPIO_EN] = ls1021a_clk_gate("gpio_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(9)); + clks[LS1021A_CLK_DBG_EN] = ls1021a_clk_gate("dbg_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(10)); + clks[LS1021A_CLK_FLEXCAN1_EN] = ls1021a_clk_gate("flexcan1_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(12)); + clks[LS1021A_CLK_FLEXCAN234_EN] = ls1021a_clk_gate("flexcan234_en", + "dummy", DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(13)); + /* For flextimer 2/3/4/5/6/7/8 */ + clks[LS1021A_CLK_FLEXTIMER_EN] = ls1021a_clk_gate("flextimer_en", + "dummy", DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(14)); + clks[LS1021A_CLK_SECMON_EN] = ls1021a_clk_gate("secmon_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(17)); + clks[LS1021A_CLK_WDOG_EN] = ls1021a_clk_gate("wdog_en", "dummy", + DCFG_CCSR_RSTRQMR1, + ls1021a_clk_shift(22)); + clks[LS1021A_CLK_WDOG12_EN] = ls1021a_clk_gate("wdog12_en", "wdog_en", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(21)); + clks[LS1021A_CLK_I2C23_EN] = ls1021a_clk_gate("i2c23_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(22)); + /* For SAI 1/2/3/4 */ + clks[LS1021A_CLK_SAI_EN] = ls1021a_clk_gate("sai_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(23)); + /* For lpuart 2/3/4/5/6 */ + clks[LS1021A_CLK_LPUART_EN] = ls1021a_clk_gate("lpuart_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(24)); + clks[LS1021A_CLK_DSPI12_EN] = ls1021a_clk_gate("dspi12_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(25)); + clks[LS1021A_CLK_ASRC_EN] = ls1021a_clk_gate("asrc_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(26)); + clks[LS1021A_CLK_SPDIF_EN] = ls1021a_clk_gate("spdif_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(27)); + clks[LS1021A_CLK_I2C1_EN] = ls1021a_clk_gate("i2c1_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(29)); + clks[LS1021A_CLK_LPUART1_EN] = ls1021a_clk_gate("lpuart1_en", "dummy", + DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(30)); + clks[LS1021A_CLK_FLEXTIMER1_EN] = ls1021a_clk_gate("flextimer1_en", + "dummy", DCFG_CCSR_DEVDISR5, + ls1021a_clk_shift(31)); + + for (i = 0; i < LS1021A_CLK_END; i++) { + if (IS_ERR(clks[i])) { + pr_err("LS1021A clk %d: register failed with %ld\n", + i, PTR_ERR(clks[i])); + BUG(); + } + } + + /* Add the clocks to provider list */ + clk_data->clks = clks; + clk_data->clk_num = LS1021A_CLK_END; + of_clk_add_provider(np, of_clk_src_onecell_get, clk_data); +} +CLK_OF_DECLARE(ls1021a, "fsl,ls1021a-gate", ls1021a_clocks_init); diff --git a/arch/arm/mach-imx/clk.h b/arch/arm/mach-imx/clk.h index 4cdf8b6..cfbae8c 100644 --- a/arch/arm/mach-imx/clk.h +++ b/arch/arm/mach-imx/clk.h @@ -107,6 +107,14 @@ static inline struct clk *imx_clk_gate_dis(const char *name, const char *parent, shift, CLK_GATE_SET_TO_DISABLE, &imx_ccm_lock); } +static inline struct clk *ls1021a_clk_gate(const char *name, const char *parent, + void __iomem *reg, u8 shift) +{ + return clk_register_gate(NULL, name, parent, CLK_SET_RATE_PARENT | + CLK_IGNORE_UNUSED, reg, shift, + CLK_GATE_SET_TO_DISABLE, &imx_ccm_lock); +} + static inline struct clk *imx_clk_mux(const char *name, void __iomem *reg, u8 shift, u8 width, const char **parents, int num_parents) { diff --git a/include/dt-bindings/clock/ls1021a-clock.h b/include/dt-bindings/clock/ls1021a-clock.h new file mode 100644 index 0000000..09b47d7 --- /dev/null +++ b/include/dt-bindings/clock/ls1021a-clock.h @@ -0,0 +1,55 @@ +/* + * Copyright 2014 Freescale Semiconductor, Inc. + * + * 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. + */ + +#ifndef __DT_BINDINGS_CLOCK_LS1021A_H +#define __DT_BINDINGS_CLOCK_LS1021A_H + +#define LS1021A_CLK_DUMMY 0 +#define LS1021A_CLK_PBL_EN 1 +#define LS1021A_CLK_ESDHC_EN 2 +#define LS1021A_CLK_DMA1_EN 3 +#define LS1021A_CLK_DMA2_EN 4 +#define LS1021A_CLK_USB3_PHY_EN 5 +#define LS1021A_CLK_USB2_EN 6 +#define LS1021A_CLK_SATA_EN 7 +#define LS1021A_CLK_USB3_EN 8 +#define LS1021A_CLK_SEC_EN 9 +#define LS1021A_CLK_2D_ACE_EN 10 +#define LS1021A_CLK_QE_EN 11 +#define LS1021A_CLK_ETSEC1_EN 12 +#define LS1021A_CLK_ETSEC2_EN 13 +#define LS1021A_CLK_ETSEC3_EN 14 +#define LS1021A_CLK_PEX1_EN 15 +#define LS1021A_CLK_PEX2_EN 16 +#define LS1021A_CLK_DUART1_EN 17 +#define LS1021A_CLK_DUART2_EN 18 +#define LS1021A_CLK_QSPI_EN 19 +#define LS1021A_CLK_DDR_EN 20 +#define LS1021A_CLK_OCRAM1_EN 21 +#define LS1021A_CLK_IFC_EN 22 +#define LS1021A_CLK_GPIO_EN 23 +#define LS1021A_CLK_DBG_EN 24 +#define LS1021A_CLK_FLEXCAN1_EN 25 +#define LS1021A_CLK_FLEXCAN234_EN 26 +#define LS1021A_CLK_FLEXTIMER_EN 27 +#define LS1021A_CLK_SECMON_EN 28 +#define LS1021A_CLK_WDOG_EN 29 +#define LS1021A_CLK_WDOG12_EN 30 +#define LS1021A_CLK_I2C23_EN 31 +#define LS1021A_CLK_SAI_EN 32 +#define LS1021A_CLK_LPUART_EN 33 +#define LS1021A_CLK_DSPI12_EN 34 +#define LS1021A_CLK_ASRC_EN 35 +#define LS1021A_CLK_SPDIF_EN 36 +#define LS1021A_CLK_I2C1_EN 37 +#define LS1021A_CLK_LPUART1_EN 38 +#define LS1021A_CLK_FLEXTIMER1_EN 39 +#define LS1021A_CLK_END 40 + +#endif /* __DT_BINDINGS_CLOCK_LS1021A_H */