From patchwork Wed Aug 19 14:51:17 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yakir Yang X-Patchwork-Id: 7038021 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id A70C0C05AC for ; Wed, 19 Aug 2015 14:54:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7A9C6207C0 for ; Wed, 19 Aug 2015 14:54:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 47A15207CF for ; Wed, 19 Aug 2015 14:54:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932299AbbHSOvj (ORCPT ); Wed, 19 Aug 2015 10:51:39 -0400 Received: from regular1.263xmail.com ([211.150.99.134]:39518 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932285AbbHSOvc (ORCPT ); Wed, 19 Aug 2015 10:51:32 -0400 Received: from ykk?rock-chips.com (unknown [192.168.167.225]) by regular1.263xmail.com (Postfix) with SMTP id 1185A75A5; Wed, 19 Aug 2015 22:51:22 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id F388B46A; Wed, 19 Aug 2015 22:51:19 +0800 (CST) X-RL-SENDER: ykk@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: ykk@rock-chips.com X-UNIQUE-TAG: <3201e03b38f70b924ef7f0c609b2cfcc> X-ATTACHMENT-NUM: 0 X-SENDER: ykk@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 192697JI0JQ; Wed, 19 Aug 2015 22:51:23 +0800 (CST) From: Yakir Yang To: Heiko Stuebner , Thierry Reding , Jingoo Han , Fabio Estevam , Inki Dae , joe@perches.com, Russell King Cc: djkurtz@google.com, dianders@google.com, seanpaul@google.com, Takashi Iwai , ajaynumb@gmail.com, Andrzej Hajda , Kyungmin Park , Philipp Zabel , David Airlie , Gustavo Padovan , Vincent Palatin , Mark Yao , Andy Yan , Kumar Gala , Ian Campbell , Rob Herring , Pawel Moll , Kishon Vijay Abraham I , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Yakir Yang Subject: [PATCH v3 08/14] phy: Add driver for rockchip Display Port PHY Date: Wed, 19 Aug 2015 09:51:17 -0500 Message-Id: <1439995877-18496-1-git-send-email-ykk@rock-chips.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439995728-18046-1-git-send-email-ykk@rock-chips.com> References: <1439995728-18046-1-git-send-email-ykk@rock-chips.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 Signed-off-by: Yakir Yang --- Changes in v3: - Take Heiko suggest, add rockchip dp phy driver, collect the phy clocks and power control. Changes in v2: None .../devicetree/bindings/phy/rockchip-dp-phy.txt | 26 +++ drivers/phy/Kconfig | 7 + drivers/phy/Makefile | 1 + drivers/phy/phy-rockchip-dp.c | 185 +++++++++++++++++++++ 4 files changed, 219 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt create mode 100644 drivers/phy/phy-rockchip-dp.c diff --git a/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt new file mode 100644 index 0000000..5de1088 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/rockchip-dp-phy.txt @@ -0,0 +1,26 @@ +Rockchip Soc Seroes Display Port PHY +------------------------------------ + +Required properties: +- compatible : should be one of the following supported values: + - "rockchip.rk3288-dp-phy" + +- reg : a list of registers used by phy driver +- clocks: from common clock binding: handle to dp clock. + of memory mapped region. +- clock-names: from common clock binding: + Required elements: "sclk_dp" "sclk_dp_24m" + +- rockchip,grf: this soc should set GRF regs, so need get grf here. +- #phy-cells : from the generic PHY bindings, must be 0; + +Example: + +edp_phy: phy@ff770274 { + compatilble = "rockchip,rk3288-dp-phy"; + reg = <0xff770274 4>; + rockchip,grf = <&grf>; + clocks = <&cru SCLK_EDP_24M>; + clock-names = "24m"; + #phy-cells = <0>; +} diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 6b8dd16..da00440 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -297,6 +297,13 @@ config PHY_ROCKCHIP_USB help Enable this to support the Rockchip USB 2.0 PHY. +config PHY_ROCKCHIP_DP + tristate "Rockchip Display Port PHY Driver" + depends on ARCH_ROCKCHIP && OF + select GENERIC_PHY + help + Enable this to support the Rockchip Display Port PHY. + config PHY_ST_SPEAR1310_MIPHY tristate "ST SPEAR1310-MIPHY driver" select GENERIC_PHY diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index f344e1b..35e3ce6 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -33,6 +33,7 @@ phy-exynos-usb2-$(CONFIG_PHY_S5PV210_USB2) += phy-s5pv210-usb2.o obj-$(CONFIG_PHY_EXYNOS5_USBDRD) += phy-exynos5-usbdrd.o obj-$(CONFIG_PHY_QCOM_APQ8064_SATA) += phy-qcom-apq8064-sata.o obj-$(CONFIG_PHY_ROCKCHIP_USB) += phy-rockchip-usb.o +obj-$(CONFIG_PHY_ROCKCHIP_DP) += phy-rockchip-dp.o obj-$(CONFIG_PHY_QCOM_IPQ806X_SATA) += phy-qcom-ipq806x-sata.o obj-$(CONFIG_PHY_ST_SPEAR1310_MIPHY) += phy-spear1310-miphy.o obj-$(CONFIG_PHY_ST_SPEAR1340_MIPHY) += phy-spear1340-miphy.o diff --git a/drivers/phy/phy-rockchip-dp.c b/drivers/phy/phy-rockchip-dp.c new file mode 100644 index 0000000..4759111 --- /dev/null +++ b/drivers/phy/phy-rockchip-dp.c @@ -0,0 +1,185 @@ +/* + * Rockchip DP PHY driver + * + * Copyright (C) 2015 FuZhou Rockchip Co., Ltd. + * Author: Yakir Yang + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define GRF_SOC_CON12 0x0274 +#define GRF_EDP_REF_CLK_SEL_INTER BIT(4) + +#define DP_PHY_SIDDQ_WRITE_EN BIT(21) +#define DP_PHY_SIDDQ_ON 0 +#define DP_PHY_SIDDQ_OFF BIT(5) + +struct rockchip_dp_phy { + struct device *dev; + struct regmap *grf; + void __iomem *regs; + struct clk *phy_24m; +}; + +static int rockchip_dp_phy_clk_enable(struct rockchip_dp_phy *dp) +{ + int ret = 0; + + ret = clk_set_rate(dp->phy_24m, 24000000); + if (ret < 0) { + dev_err(dp->dev, "cannot set clock phy_24m %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(dp->phy_24m); + if (ret < 0) { + dev_err(dp->dev, "cannot enable clock phy_24m %d\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_dp_phy_clk_disable(struct rockchip_dp_phy *dp) +{ + clk_disable_unprepare(dp->phy_24m); + + return 0; +} + +static int rockchip_set_phy_state(struct phy *phy, bool enable) +{ + struct rockchip_dp_phy *dp = phy_get_drvdata(phy); + + if (enable) { + rockchip_dp_phy_clk_enable(dp); + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_ON, dp->regs); + } else { + rockchip_dp_phy_clk_disable(dp); + writel(DP_PHY_SIDDQ_WRITE_EN | DP_PHY_SIDDQ_OFF, dp->regs); + } + + return 0; +} + +static int rockchip_dp_phy_power_on(struct phy *phy) +{ + return rockchip_set_phy_state(phy, true); +} + +static int rockchip_dp_phy_power_off(struct phy *phy) +{ + return rockchip_set_phy_state(phy, false); +} + +static struct phy_ops rockchip_dp_phy_ops = { + .power_on = rockchip_dp_phy_power_on, + .power_off = rockchip_dp_phy_power_off, + .owner = THIS_MODULE, +}; + +static int rockchip_dp_phy_init(struct rockchip_dp_phy *dp) +{ + struct device *dev = dp->dev; + struct device_node *np = dev->of_node; + int ret; + + dp->phy_24m = devm_clk_get(dev, "24m"); + if (IS_ERR(dp->phy_24m)) { + dev_err(dev, "cannot get clock 24m\n"); + return PTR_ERR(dp->phy_24m); + } + + ret = rockchip_dp_phy_clk_enable(dp); + if (ret < 0) { + dev_err(dp->dev, "cannot enable dp phy clk %d\n", ret); + return ret; + } + + dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); + if (IS_ERR(dp->grf)) { + dev_err(dev, "rk3288-dp needs rockchip,grf property\n"); + return PTR_ERR(dp->grf); + } + + ret = regmap_write(dp->grf, GRF_SOC_CON12, + GRF_EDP_REF_CLK_SEL_INTER | + (GRF_EDP_REF_CLK_SEL_INTER << 16)); + if (ret != 0) { + dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); + return ret; + } + + return 0; +} + +static int rockchip_dp_phy_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct phy_provider *phy_provider; + struct rockchip_dp_phy *dp; + struct resource *res; + struct phy *phy; + int ret; + + dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL); + if (IS_ERR(dp)) + return -ENOMEM; + + dp->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dp->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(dp->regs)) + return PTR_ERR(dp->regs); + + ret = rockchip_dp_phy_init(dp); + if (ret) + return ret; + + phy = devm_phy_create(dev, NULL, &rockchip_dp_phy_ops, NULL); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create phy\n"); + return PTR_ERR(phy); + } + phy_set_drvdata(phy, dp); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static const struct of_device_id rockchip_dp_phy_dt_ids[] = { + { .compatible = "rockchip,rk3288-dp-phy" }, + {} +}; + +MODULE_DEVICE_TABLE(of, rockchip_dp_phy_dt_ids); + +static struct platform_driver rockchip_dp_phy_driver = { + .probe = rockchip_dp_phy_probe, + .driver = { + .name = "rockchip-dp-phy", + .owner = THIS_MODULE, + .of_match_table = rockchip_dp_phy_dt_ids, + }, +}; + +module_platform_driver(rockchip_dp_phy_driver); + +MODULE_AUTHOR("Yakir Yang "); +MODULE_DESCRIPTION("Rockchip DP PHY driver"); +MODULE_LICENSE("GPL v2");