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This is the bulk of new SoC enablement and other platform changes for 3.17: * Samsung S5PV210 has been converted to DT and multiplatform * Clock drivers and bindings for some of the lower-end i.MX 1/2 platforms * Kirkwood, one of the popular Marvell platforms, is folded into the mvebu platform code, removing mach-kirkwood. * Hwmod data for TI AM43xx and DRA7 platforms. * More additions of Renesas shmobile platform support * Removal of plat-samsung contents that can be removed with S5PV210 being multiplatform/DT-enabled and the other two old platforms being removed. New platforms (most with only basic support right now): * Hisilicon X5HD2 settop box chipset is introduced * Mediatek MT6589 (mobile chipset) is introduced * Broadcom BCM7xxx settop box chipset is introduced + as usual a lot other pieces all over the platform code. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQIcBAABAgAGBQJT5Dp+AAoJEIwa5zzehBx3w1sP/0vjT/LQOmC8Lv8RW2Ley2ua hNu3HcNPnT/N40JEdU9YNv3q0fdxGgcfKj011CNN+49zPSUf1xduk2wfCAk9yV50 8Sbt1PfDGm1YyUugGN420CzI431pPoM1OGXHZHkAmg+2J286RtUi3NckB//QDbCY QhEjhpYc9SXhAOCGwmB4ab7thOljOFSPzKTLMTu3+PNI5zRPRgkDkt6w9XlsAYmB nuR271BnzsROkMzAjycwaJ3kdim7wqrMRfk8g96o0jHSF5qf4zsT5uWYYAjTxdUQ 8Ajz6zjeHe4+95TwTDcq+lCX6rDLZgwkvCAc6hFbeg0uR7Dyek0h6XMEYtwdjaiU KNPwOENrYdENNDAGRpkFp1x4h/rY9Plfru0bBo5o6t7aPBvmNeCDzRtlTtLiUNDV dG8sfDMtrS/wFHVjylDSQ60Mb+wuW0XneC8D7chY/iRhIllUYi6YXXvt+/tH5C20 oYDOWqqcDFSb0sJhE5pn4KBV82ZaHx9jMBWGLl+erg2sDX/SK8SxOkLqKYZKtKB5 0leOGE3Y+C70xt3G9HftLz2sAvvt+C8UPsApPT+dHNE401TWJOYx6LphPkQKjeeK P1iwKi+It3l+FaBypgJy/LeMQRy7EyvDBK2I5WoVL/R2qq14EmP1ui3Tthjj0bhq tBBof6P9c8OnRVj1Lz3R =5TJ6 -----END PGP SIGNATURE----- Merge tag 'soc-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC platform changes from Olof Johansson: "This is the bulk of new SoC enablement and other platform changes for 3.17: - Samsung S5PV210 has been converted to DT and multiplatform - Clock drivers and bindings for some of the lower-end i.MX 1/2 platforms - Kirkwood, one of the popular Marvell platforms, is folded into the mvebu platform code, removing mach-kirkwood - Hwmod data for TI AM43xx and DRA7 platforms - More additions of Renesas shmobile platform support - Removal of plat-samsung contents that can be removed with S5PV210 being multiplatform/DT-enabled and the other two old platforms being removed New platforms (most with only basic support right now): - Hisilicon X5HD2 settop box chipset is introduced - Mediatek MT6589 (mobile chipset) is introduced - Broadcom BCM7xxx settop box chipset is introduced + as usual a lot other pieces all over the platform code" * tag 'soc-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (240 commits) ARM: hisi: remove smp from machine descriptor power: reset: move hisilicon reboot code ARM: dts: Add hix5hd2-dkb dts file. ARM: debug: Rename Hi3716 to HIX5HD2 ARM: hisi: enable hix5hd2 SoC ARM: hisi: add ARCH_HISI MAINTAINERS: add entry for Broadcom ARM STB architecture ARM: brcmstb: select GISB arbiter and interrupt drivers ARM: brcmstb: add infrastructure for ARM-based Broadcom STB SoCs ARM: configs: enable SMP in bcm_defconfig ARM: add SMP support for Broadcom mobile SoCs Documentation: arm: misc updates to Marvell EBU SoC status Documentation: arm: add URLs to public datasheets for the Marvell Armada XP SoC ARM: mvebu: fix build without platforms selected ARM: mvebu: add cpuidle support for Armada 38x ARM: mvebu: add cpuidle support for Armada 370 cpuidle: mvebu: add Armada 38x support cpuidle: mvebu: add Armada 370 support cpuidle: mvebu: rename the driver from armada-370-xp to mvebu-v7 ARM: mvebu: export the SCU address ...
242 lines
6.1 KiB
C
242 lines
6.1 KiB
C
/*
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* Samsung SoC USB 1.1/2.0 PHY driver
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*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* Author: Kamil Debski <k.debski@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include "phy-samsung-usb2.h"
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static int samsung_usb2_phy_power_on(struct phy *phy)
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{
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struct samsung_usb2_phy_instance *inst = phy_get_drvdata(phy);
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struct samsung_usb2_phy_driver *drv = inst->drv;
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int ret;
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dev_dbg(drv->dev, "Request to power_on \"%s\" usb phy\n",
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inst->cfg->label);
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ret = clk_prepare_enable(drv->clk);
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if (ret)
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goto err_main_clk;
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ret = clk_prepare_enable(drv->ref_clk);
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if (ret)
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goto err_instance_clk;
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if (inst->cfg->power_on) {
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spin_lock(&drv->lock);
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ret = inst->cfg->power_on(inst);
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spin_unlock(&drv->lock);
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}
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return 0;
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err_instance_clk:
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clk_disable_unprepare(drv->clk);
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err_main_clk:
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return ret;
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}
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static int samsung_usb2_phy_power_off(struct phy *phy)
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{
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struct samsung_usb2_phy_instance *inst = phy_get_drvdata(phy);
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struct samsung_usb2_phy_driver *drv = inst->drv;
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int ret = 0;
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dev_dbg(drv->dev, "Request to power_off \"%s\" usb phy\n",
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inst->cfg->label);
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if (inst->cfg->power_off) {
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spin_lock(&drv->lock);
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ret = inst->cfg->power_off(inst);
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spin_unlock(&drv->lock);
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}
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clk_disable_unprepare(drv->ref_clk);
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clk_disable_unprepare(drv->clk);
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return ret;
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}
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static struct phy_ops samsung_usb2_phy_ops = {
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.power_on = samsung_usb2_phy_power_on,
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.power_off = samsung_usb2_phy_power_off,
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.owner = THIS_MODULE,
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};
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static struct phy *samsung_usb2_phy_xlate(struct device *dev,
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struct of_phandle_args *args)
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{
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struct samsung_usb2_phy_driver *drv;
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drv = dev_get_drvdata(dev);
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if (!drv)
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return ERR_PTR(-EINVAL);
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if (WARN_ON(args->args[0] >= drv->cfg->num_phys))
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return ERR_PTR(-ENODEV);
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return drv->instances[args->args[0]].phy;
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}
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static const struct of_device_id samsung_usb2_phy_of_match[] = {
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#ifdef CONFIG_PHY_EXYNOS4X12_USB2
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{
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.compatible = "samsung,exynos3250-usb2-phy",
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.data = &exynos3250_usb2_phy_config,
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},
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#endif
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#ifdef CONFIG_PHY_EXYNOS4210_USB2
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{
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.compatible = "samsung,exynos4210-usb2-phy",
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.data = &exynos4210_usb2_phy_config,
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},
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#endif
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#ifdef CONFIG_PHY_EXYNOS4X12_USB2
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{
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.compatible = "samsung,exynos4x12-usb2-phy",
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.data = &exynos4x12_usb2_phy_config,
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},
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#endif
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#ifdef CONFIG_PHY_EXYNOS5250_USB2
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{
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.compatible = "samsung,exynos5250-usb2-phy",
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.data = &exynos5250_usb2_phy_config,
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},
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#endif
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#ifdef CONFIG_PHY_S5PV210_USB2
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{
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.compatible = "samsung,s5pv210-usb2-phy",
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.data = &s5pv210_usb2_phy_config,
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},
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#endif
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{ },
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};
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MODULE_DEVICE_TABLE(of, samsung_usb2_phy_of_match);
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static int samsung_usb2_phy_probe(struct platform_device *pdev)
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{
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const struct of_device_id *match;
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const struct samsung_usb2_phy_config *cfg;
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struct device *dev = &pdev->dev;
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struct phy_provider *phy_provider;
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struct resource *mem;
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struct samsung_usb2_phy_driver *drv;
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int i, ret;
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if (!pdev->dev.of_node) {
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dev_err(dev, "This driver is required to be instantiated from device tree\n");
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return -EINVAL;
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}
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match = of_match_node(samsung_usb2_phy_of_match, pdev->dev.of_node);
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if (!match) {
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dev_err(dev, "of_match_node() failed\n");
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return -EINVAL;
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}
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cfg = match->data;
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drv = devm_kzalloc(dev, sizeof(struct samsung_usb2_phy_driver) +
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cfg->num_phys * sizeof(struct samsung_usb2_phy_instance),
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GFP_KERNEL);
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if (!drv)
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return -ENOMEM;
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dev_set_drvdata(dev, drv);
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spin_lock_init(&drv->lock);
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drv->cfg = cfg;
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drv->dev = dev;
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mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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drv->reg_phy = devm_ioremap_resource(dev, mem);
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if (IS_ERR(drv->reg_phy)) {
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dev_err(dev, "Failed to map register memory (phy)\n");
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return PTR_ERR(drv->reg_phy);
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}
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drv->reg_pmu = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
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"samsung,pmureg-phandle");
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if (IS_ERR(drv->reg_pmu)) {
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dev_err(dev, "Failed to map PMU registers (via syscon)\n");
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return PTR_ERR(drv->reg_pmu);
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}
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if (drv->cfg->has_mode_switch) {
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drv->reg_sys = syscon_regmap_lookup_by_phandle(
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pdev->dev.of_node, "samsung,sysreg-phandle");
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if (IS_ERR(drv->reg_sys)) {
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dev_err(dev, "Failed to map system registers (via syscon)\n");
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return PTR_ERR(drv->reg_sys);
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}
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}
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drv->clk = devm_clk_get(dev, "phy");
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if (IS_ERR(drv->clk)) {
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dev_err(dev, "Failed to get clock of phy controller\n");
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return PTR_ERR(drv->clk);
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}
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drv->ref_clk = devm_clk_get(dev, "ref");
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if (IS_ERR(drv->ref_clk)) {
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dev_err(dev, "Failed to get reference clock for the phy controller\n");
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return PTR_ERR(drv->ref_clk);
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}
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drv->ref_rate = clk_get_rate(drv->ref_clk);
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if (drv->cfg->rate_to_clk) {
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ret = drv->cfg->rate_to_clk(drv->ref_rate, &drv->ref_reg_val);
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if (ret)
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return ret;
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}
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for (i = 0; i < drv->cfg->num_phys; i++) {
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char *label = drv->cfg->phys[i].label;
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struct samsung_usb2_phy_instance *p = &drv->instances[i];
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dev_dbg(dev, "Creating phy \"%s\"\n", label);
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p->phy = devm_phy_create(dev, NULL, &samsung_usb2_phy_ops,
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NULL);
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if (IS_ERR(p->phy)) {
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dev_err(drv->dev, "Failed to create usb2_phy \"%s\"\n",
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label);
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return PTR_ERR(p->phy);
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}
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p->cfg = &drv->cfg->phys[i];
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p->drv = drv;
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phy_set_bus_width(p->phy, 8);
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phy_set_drvdata(p->phy, p);
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}
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phy_provider = devm_of_phy_provider_register(dev,
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samsung_usb2_phy_xlate);
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if (IS_ERR(phy_provider)) {
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dev_err(drv->dev, "Failed to register phy provider\n");
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return PTR_ERR(phy_provider);
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}
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return 0;
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}
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static struct platform_driver samsung_usb2_phy_driver = {
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.probe = samsung_usb2_phy_probe,
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.driver = {
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.of_match_table = samsung_usb2_phy_of_match,
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.name = "samsung-usb2-phy",
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.owner = THIS_MODULE,
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}
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};
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module_platform_driver(samsung_usb2_phy_driver);
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MODULE_DESCRIPTION("Samsung S5P/EXYNOS SoC USB PHY driver");
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MODULE_AUTHOR("Kamil Debski <k.debski@samsung.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:samsung-usb2-phy");
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