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Tue, 02 Jul 2013 17:40:31 +0900 (KST) Received: from DOJG1HAN03 ([12.23.120.99]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0MPA007FGW3JNS60@mmp1.samsung.com>; Tue, 02 Jul 2013 17:40:31 +0900 (KST) From: Jingoo Han To: linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org Subject: [PATCH V4 2/4] phy: Add driver for Exynos DP PHY Date: Tue, 02 Jul 2013 17:40:31 +0900 Message-id: <000b01ce76ff$cf9fd6a0$6edf83e0$@samsung.com> MIME-version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-index: Ac52/8AaEXRGpR9cSayfJtkazh7hlQ== Content-language: ko X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmplleLIzCtJLcpLzFFi42I5/e+Zge7/iZcCDdonalkcvF9v8fKQpsWB 2Q9ZLa6ft7OYdH8Ci8WMpY9YLS4vvMRq0bvgKpvFhac9bBZnm96wW2x6fI3V4kTfB1aLng1b WS1mnN/HZLHu4Qsmi8Nv2lkt1s94zWKxfv4tNgchj52z7rJ7vLpwh8Vj85J6j/MzFjJ69G1Z xehx/MZ2Jo/Pm+QC2KO4bFJSczLLUov07RK4MmZ/X8dc8EGzYunqg4wNjBeUuhg5OSQETCQe fNvHDmGLSVy4t54NxBYSWMYosX6RC0zN1r4pTF2MXEDxRYwSE/+chnJ+MUpMmnwFrINNQE3i y5fDQJM4OEQEvCWWX1MEqWEWuMYi0fPqPSNIjbCApcS8X29YQWpYBFQl9p72AwnzAoV3fP7J AmELSvyYfA/MZhbQkli/8zgThC0vsXnNW2aIgxQkdpx9zQixSk+i454URImIxL4X7xhB1koI rOWQeDH7OVgvi4CAxLfJh1hA6iUEZCU2HYAaIylxcMUNlgmMYrOQbJ6FZPMsJJtnIVmxgJFl FaNoakFyQXFSepGJXnFibnFpXrpecn7uJkZIEpiwg/HeAetDjMlA6ycyS4km5wOTSF5JvKGx mZGFqYmpsZG5pRlpwkrivOot1oFCAumJJanZqakFqUXxRaU5qcWHGJk4OKUaGPv3H3dx70xq z+eqUgrM7F5/ZftT2zV/1aye3FY/Z/aNzVFOt2n+QuXjOg+8Jq/dcCf2QVzWsgj5m5uCdt/j WnFIJT31c+rvqrmKBX/2J/zw83Fjse188zJh0ZnGQxUlE8484Dn5xsv2ZNzNlLQuxw3nTrxT l/rfo8okocyyxva++yFGq89hq5RYijMSDbWYi4oTAfmcFBsYAwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrMKsWRmVeSWpSXmKPExsVy+t9jAd3/Ey8FGsy9pGxx8H69xctDmhYH Zj9ktbh+3s5i0v0JLBYzlj5itbi88BKrRe+Cq2wWF572sFmcbXrDbrHp8TVWixN9H1gtejZs ZbWYcX4fk8W6hy+YLA6/aWe1WD/jNYvF+vm32ByEPHbOusvu8erCHRaPzUvqPc7PWMjo0bdl FaPH8RvbmTw+b5ILYI9qYLTJSE1MSS1SSM1Lzk/JzEu3VfIOjneONzUzMNQ1tLQwV1LIS8xN tVVy8QnQdcvMAXpCSaEsMacUKBSQWFyspG+HaUJoiJuuBUxjhK5vSBBcj5EBGkhYx5gx+/s6 5oIPmhVLVx9kbGC8oNTFyMkhIWAisbVvChOELSZx4d56ti5GLg4hgUWMEhP/nGaCcH4xSkya fIUNpIpNQE3iy5fD7F2MHBwiAt4Sy68pgtQwC1xjkeh59Z4RpEZYwFJi3q83rCA1LAKqEntP +4GEeYHCOz7/ZIGwBSV+TL4HZjMLaEms33mcCcKWl9i85i0zxEEKEjvOvmaEWKUn0XFPCqJE RGLfi3eMExgFZiGZNAvJpFlIJs1C0rKAkWUVo2hqQXJBcVJ6rpFecWJucWleul5yfu4mRnCS eSa9g3FVg8UhRgEORiUeXoV5FwOFWBPLiitzDzFKcDArifDe9AYK8aYkVlalFuXHF5XmpBYf YkwG+nMis5Rocj4wAeaVxBsam5gZWRqZWRiZmJuTJqwkznuw1TpQSCA9sSQ1OzW1ILUIZgsT B6dUA6N8cMPxn6xn9K5vnh26xEHi4SxlBeVZDzRCv0z7OL2p+lrAfsvj83b/+HNs9xkbMQar wHdMuyWnvU4N93vz2U9WcrvH458Wu7Tta1deYszfs2OW96y5F+yffFqo8CDu6WTn5Ldz118M qmcqKGENjjpyTbT3VMwb557Yy68uFH5JPXjyneMPD6ejSizFGYmGWsxFxYkAMxk8aXYDAAA= DLP-Filter: Pass X-MTR: 20000000000000000@CPGS X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130702_044056_463781_103ED864 X-CRM114-Status: GOOD ( 16.75 ) X-Spam-Score: -6.9 (------) Cc: linux-fbdev@vger.kernel.org, 'Kukjin Kim' , 'Hui Wang' , 'Tomasz Figa' , Jingoo Han , 'Donghwa Lee' , 'Felipe Balbi' , 'Kishon Vijay Abraham I' , 'Inki Dae' , 'Kyungmin Park' , 'Tomi Valkeinen' , 'Sylwester Nawrocki' , 'Jean-Christophe PLAGNIOL-VILLARD' , devicetree-discuss@lists.ozlabs.org, linux-media@vger.kernel.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a PHY provider driver for the Samsung Exynos SoC DP PHY. Signed-off-by: Jingoo Han Cc: Sylwester Nawrocki Acked-by: Felipe Balbi Reviewed-by: Tomasz Figa --- .../devicetree/bindings/phy/samsung-phy.txt | 8 ++ drivers/phy/Kconfig | 6 ++ drivers/phy/Makefile | 1 + drivers/phy/phy-exynos-dp-video.c | 111 ++++++++++++++++++++ 4 files changed, 126 insertions(+) create mode 100644 drivers/phy/phy-exynos-dp-video.c diff --git a/Documentation/devicetree/bindings/phy/samsung-phy.txt b/Documentation/devicetree/bindings/phy/samsung-phy.txt index 5ff208c..c0fccaa 100644 --- a/Documentation/devicetree/bindings/phy/samsung-phy.txt +++ b/Documentation/devicetree/bindings/phy/samsung-phy.txt @@ -12,3 +12,11 @@ the PHY specifier identifies the PHY and its meaning is as follows: 1 - MIPI DSIM 0, 2 - MIPI CSIS 1, 3 - MIPI DSIM 1. + +Samsung EXYNOS SoC series Display Port PHY +------------------------------------------------- + +Required properties: +- compatible : should be "samsung,exynos5250-dp-video-phy"; +- reg : offset and length of the Display Port PHY register set; +- #phy-cells : from the generic PHY bindings, must be 0; diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 6f446d0..ed0b1b8 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -19,4 +19,10 @@ config PHY_EXYNOS_MIPI_VIDEO help Support for MIPI CSI-2 and MIPI DSI DPHY found on Samsung S5P and EXYNOS SoCs. + +config PHY_EXYNOS_DP_VIDEO + tristate "EXYNOS SoC series Display Port PHY driver" + depends on OF + help + Support for Display Port PHY found on Samsung EXYNOS SoCs. endif diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 71d8841..0fd1340 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_GENERIC_PHY) += phy-core.o obj-$(CONFIG_PHY_EXYNOS_MIPI_VIDEO) += phy-exynos-mipi-video.o +obj-$(CONFIG_PHY_EXYNOS_DP_VIDEO) += phy-exynos-dp-video.o diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c new file mode 100644 index 0000000..3c8e247 --- /dev/null +++ b/drivers/phy/phy-exynos-dp-video.c @@ -0,0 +1,111 @@ +/* + * Samsung EXYNOS SoC series Display Port PHY driver + * + * Copyright (C) 2013 Samsung Electronics Co., Ltd. + * Author: Jingoo Han + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include + +/* DPTX_PHY_CONTROL register */ +#define EXYNOS_DPTX_PHY_ENABLE (1 << 0) + +struct exynos_dp_video_phy { + void __iomem *regs; +}; + +static int __set_phy_state(struct exynos_dp_video_phy *state, unsigned int on) +{ + u32 reg; + + reg = readl(state->regs); + if (on) + reg |= EXYNOS_DPTX_PHY_ENABLE; + else + reg &= ~EXYNOS_DPTX_PHY_ENABLE; + writel(reg, state->regs); + + return 0; +} + +static int exynos_dp_video_phy_power_on(struct phy *phy) +{ + struct exynos_dp_video_phy *state = phy_get_drvdata(phy); + + return __set_phy_state(state, 1); +} + +static int exynos_dp_video_phy_power_off(struct phy *phy) +{ + struct exynos_dp_video_phy *state = phy_get_drvdata(phy); + + return __set_phy_state(state, 0); +} + +static struct phy_ops exynos_dp_video_phy_ops = { + .power_on = exynos_dp_video_phy_power_on, + .power_off = exynos_dp_video_phy_power_off, + .owner = THIS_MODULE, +}; + +static int exynos_dp_video_phy_probe(struct platform_device *pdev) +{ + struct exynos_dp_video_phy *state; + struct device *dev = &pdev->dev; + struct resource *res; + struct phy_provider *phy_provider; + struct phy *phy; + + state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); + if (!state) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + state->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(state->regs)) + return PTR_ERR(state->regs); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) + return PTR_ERR(phy_provider); + + phy = devm_phy_create(dev, 0, &exynos_dp_video_phy_ops, NULL); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create Display Port PHY\n"); + return PTR_ERR(phy); + } + phy_set_drvdata(phy, state); + + return 0; +} + +static const struct of_device_id exynos_dp_video_phy_of_match[] = { + { .compatible = "samsung,exynos5250-dp-video-phy" }, + { }, +}; +MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match); + +static struct platform_driver exynos_dp_video_phy_driver = { + .probe = exynos_dp_video_phy_probe, + .driver = { + .name = "exynos-dp-video-phy", + .owner = THIS_MODULE, + .of_match_table = exynos_dp_video_phy_of_match, + } +}; +module_platform_driver(exynos_dp_video_phy_driver); + +MODULE_AUTHOR("Jingoo Han "); +MODULE_DESCRIPTION("Samsung EXYNOS SoC DP PHY driver"); +MODULE_LICENSE("GPL v2");