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![David Lechner](/assets/img/avatar_default.png)
This converts from using a platform device for the CFGCHIP syscon regmap to using platform data to pass the regmap to consumers. A lazy getter function is used so that the regmap will only be created if it is actually used. This function will also be used in the clock init when we convert to the common clock framework. The USB PHY driver is currently the only consumer. This driver is updated to use platform data to get the CFGCHIP regmap instead of syscon_regmap_lookup_by_pdevname(). Signed-off-by: David Lechner <david@lechnology.com> Acked-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
253 lines
6.3 KiB
C
253 lines
6.3 KiB
C
/*
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* phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver
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*
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* Copyright (C) 2016 David Lechner <david@lechnology.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 as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/mfd/da8xx-cfgchip.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/phy/phy.h>
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#include <linux/platform_data/phy-da8xx-usb.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN)
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struct da8xx_usb_phy {
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struct phy_provider *phy_provider;
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struct phy *usb11_phy;
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struct phy *usb20_phy;
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struct clk *usb11_clk;
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struct clk *usb20_clk;
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struct regmap *regmap;
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};
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static int da8xx_usb11_phy_power_on(struct phy *phy)
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{
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
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int ret;
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ret = clk_prepare_enable(d_phy->usb11_clk);
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if (ret)
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return ret;
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM,
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CFGCHIP2_USB1SUSPENDM);
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return 0;
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}
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static int da8xx_usb11_phy_power_off(struct phy *phy)
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{
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0);
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clk_disable_unprepare(d_phy->usb11_clk);
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return 0;
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}
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static const struct phy_ops da8xx_usb11_phy_ops = {
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.power_on = da8xx_usb11_phy_power_on,
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.power_off = da8xx_usb11_phy_power_off,
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.owner = THIS_MODULE,
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};
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static int da8xx_usb20_phy_power_on(struct phy *phy)
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{
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
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int ret;
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ret = clk_prepare_enable(d_phy->usb20_clk);
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if (ret)
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return ret;
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0);
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return 0;
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}
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static int da8xx_usb20_phy_power_off(struct phy *phy)
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{
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN,
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CFGCHIP2_OTGPWRDN);
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clk_disable_unprepare(d_phy->usb20_clk);
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return 0;
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}
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static int da8xx_usb20_phy_set_mode(struct phy *phy, enum phy_mode mode)
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{
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
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u32 val;
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switch (mode) {
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case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */
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val = CFGCHIP2_OTGMODE_FORCE_HOST;
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break;
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case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */
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val = CFGCHIP2_OTGMODE_FORCE_DEVICE;
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break;
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case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */
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val = CFGCHIP2_OTGMODE_NO_OVERRIDE;
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break;
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default:
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return -EINVAL;
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}
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK,
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val);
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return 0;
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}
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static const struct phy_ops da8xx_usb20_phy_ops = {
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.power_on = da8xx_usb20_phy_power_on,
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.power_off = da8xx_usb20_phy_power_off,
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.set_mode = da8xx_usb20_phy_set_mode,
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.owner = THIS_MODULE,
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};
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static struct phy *da8xx_usb_phy_of_xlate(struct device *dev,
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struct of_phandle_args *args)
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{
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struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev);
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if (!d_phy)
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return ERR_PTR(-ENODEV);
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switch (args->args[0]) {
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case 0:
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return d_phy->usb20_phy;
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case 1:
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return d_phy->usb11_phy;
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default:
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return ERR_PTR(-EINVAL);
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}
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}
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static int da8xx_usb_phy_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct da8xx_usb_phy_platform_data *pdata = dev->platform_data;
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struct device_node *node = dev->of_node;
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struct da8xx_usb_phy *d_phy;
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d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL);
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if (!d_phy)
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return -ENOMEM;
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if (pdata)
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d_phy->regmap = pdata->cfgchip;
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else
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d_phy->regmap = syscon_regmap_lookup_by_compatible(
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"ti,da830-cfgchip");
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if (IS_ERR(d_phy->regmap)) {
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dev_err(dev, "Failed to get syscon\n");
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return PTR_ERR(d_phy->regmap);
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}
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d_phy->usb11_clk = devm_clk_get(dev, "usb1_clk48");
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if (IS_ERR(d_phy->usb11_clk)) {
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dev_err(dev, "Failed to get usb1_clk48\n");
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return PTR_ERR(d_phy->usb11_clk);
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}
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d_phy->usb20_clk = devm_clk_get(dev, "usb0_clk48");
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if (IS_ERR(d_phy->usb20_clk)) {
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dev_err(dev, "Failed to get usb0_clk48\n");
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return PTR_ERR(d_phy->usb20_clk);
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}
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d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops);
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if (IS_ERR(d_phy->usb11_phy)) {
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dev_err(dev, "Failed to create usb11 phy\n");
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return PTR_ERR(d_phy->usb11_phy);
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}
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d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops);
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if (IS_ERR(d_phy->usb20_phy)) {
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dev_err(dev, "Failed to create usb20 phy\n");
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return PTR_ERR(d_phy->usb20_phy);
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}
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platform_set_drvdata(pdev, d_phy);
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phy_set_drvdata(d_phy->usb11_phy, d_phy);
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phy_set_drvdata(d_phy->usb20_phy, d_phy);
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if (node) {
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d_phy->phy_provider = devm_of_phy_provider_register(dev,
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da8xx_usb_phy_of_xlate);
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if (IS_ERR(d_phy->phy_provider)) {
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dev_err(dev, "Failed to create phy provider\n");
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return PTR_ERR(d_phy->phy_provider);
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}
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} else {
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int ret;
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ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy",
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"ohci-da8xx");
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if (ret)
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dev_warn(dev, "Failed to create usb11 phy lookup\n");
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ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy",
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"musb-da8xx");
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if (ret)
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dev_warn(dev, "Failed to create usb20 phy lookup\n");
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}
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regmap_write_bits(d_phy->regmap, CFGCHIP(2),
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PHY_INIT_BITS, PHY_INIT_BITS);
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return 0;
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}
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static int da8xx_usb_phy_remove(struct platform_device *pdev)
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{
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struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev);
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if (!pdev->dev.of_node) {
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phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx");
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phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx");
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}
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return 0;
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}
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static const struct of_device_id da8xx_usb_phy_ids[] = {
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{ .compatible = "ti,da830-usb-phy" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids);
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static struct platform_driver da8xx_usb_phy_driver = {
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.probe = da8xx_usb_phy_probe,
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.remove = da8xx_usb_phy_remove,
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.driver = {
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.name = "da8xx-usb-phy",
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.of_match_table = da8xx_usb_phy_ids,
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},
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};
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module_platform_driver(da8xx_usb_phy_driver);
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MODULE_ALIAS("platform:da8xx-usb-phy");
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MODULE_AUTHOR("David Lechner <david@lechnology.com>");
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MODULE_DESCRIPTION("TI DA8xx USB PHY driver");
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MODULE_LICENSE("GPL v2");
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