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https://github.com/torvalds/linux
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7559e7572c
The DT of_device.h and of_platform.h date back to the separate of_platform_bus_type before it as merged into the regular platform bus. As part of that merge prepping Arm DT support 13 years ago, they "temporarily" include each other. They also include platform_device.h and of.h. As a result, there's a pretty much random mix of those include files used throughout the tree. In order to detangle these headers and replace the implicit includes with struct declarations, users need to explicitly include the correct includes. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> # for drivers/phy/phy-can-transceiver.c Acked-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Link: https://lore.kernel.org/r/20230714174841.4061919-1-robh@kernel.org Signed-off-by: Vinod Koul <vkoul@kernel.org>
129 lines
3 KiB
C
129 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* phy-mvebu-sata.c: SATA Phy driver for the Marvell mvebu SoCs.
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*
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* Copyright (C) 2013 Andrew Lunn <andrew@lunn.ch>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/clk.h>
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#include <linux/phy/phy.h>
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#include <linux/io.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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struct priv {
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struct clk *clk;
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void __iomem *base;
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};
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#define SATA_PHY_MODE_2 0x0330
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#define MODE_2_FORCE_PU_TX BIT(0)
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#define MODE_2_FORCE_PU_RX BIT(1)
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#define MODE_2_PU_PLL BIT(2)
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#define MODE_2_PU_IVREF BIT(3)
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#define SATA_IF_CTRL 0x0050
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#define CTRL_PHY_SHUTDOWN BIT(9)
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static int phy_mvebu_sata_power_on(struct phy *phy)
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{
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struct priv *priv = phy_get_drvdata(phy);
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u32 reg;
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clk_prepare_enable(priv->clk);
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/* Enable PLL and IVREF */
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reg = readl(priv->base + SATA_PHY_MODE_2);
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reg |= (MODE_2_FORCE_PU_TX | MODE_2_FORCE_PU_RX |
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MODE_2_PU_PLL | MODE_2_PU_IVREF);
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writel(reg , priv->base + SATA_PHY_MODE_2);
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/* Enable PHY */
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reg = readl(priv->base + SATA_IF_CTRL);
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reg &= ~CTRL_PHY_SHUTDOWN;
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writel(reg, priv->base + SATA_IF_CTRL);
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clk_disable_unprepare(priv->clk);
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return 0;
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}
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static int phy_mvebu_sata_power_off(struct phy *phy)
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{
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struct priv *priv = phy_get_drvdata(phy);
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u32 reg;
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clk_prepare_enable(priv->clk);
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/* Disable PLL and IVREF */
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reg = readl(priv->base + SATA_PHY_MODE_2);
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reg &= ~(MODE_2_FORCE_PU_TX | MODE_2_FORCE_PU_RX |
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MODE_2_PU_PLL | MODE_2_PU_IVREF);
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writel(reg, priv->base + SATA_PHY_MODE_2);
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/* Disable PHY */
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reg = readl(priv->base + SATA_IF_CTRL);
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reg |= CTRL_PHY_SHUTDOWN;
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writel(reg, priv->base + SATA_IF_CTRL);
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clk_disable_unprepare(priv->clk);
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return 0;
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}
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static const struct phy_ops phy_mvebu_sata_ops = {
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.power_on = phy_mvebu_sata_power_on,
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.power_off = phy_mvebu_sata_power_off,
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.owner = THIS_MODULE,
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};
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static int phy_mvebu_sata_probe(struct platform_device *pdev)
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{
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struct phy_provider *phy_provider;
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struct priv *priv;
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struct phy *phy;
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priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(priv->base))
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return PTR_ERR(priv->base);
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priv->clk = devm_clk_get(&pdev->dev, "sata");
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if (IS_ERR(priv->clk))
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return PTR_ERR(priv->clk);
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phy = devm_phy_create(&pdev->dev, NULL, &phy_mvebu_sata_ops);
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if (IS_ERR(phy))
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return PTR_ERR(phy);
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phy_set_drvdata(phy, priv);
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phy_provider = devm_of_phy_provider_register(&pdev->dev,
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of_phy_simple_xlate);
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if (IS_ERR(phy_provider))
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return PTR_ERR(phy_provider);
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/* The boot loader may of left it on. Turn it off. */
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phy_mvebu_sata_power_off(phy);
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return 0;
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}
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static const struct of_device_id phy_mvebu_sata_of_match[] = {
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{ .compatible = "marvell,mvebu-sata-phy" },
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{ },
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};
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static struct platform_driver phy_mvebu_sata_driver = {
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.probe = phy_mvebu_sata_probe,
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.driver = {
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.name = "phy-mvebu-sata",
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.of_match_table = phy_mvebu_sata_of_match,
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}
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};
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builtin_platform_driver(phy_mvebu_sata_driver);
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