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3246627f11
The function returns zero unconditionally. Change it to return void instead which simplifies some callers as error handing becomes unnecessary. The function is also used for some drivers as remove callback. Switch these to the .remove_new() callback. For some others no error can happen in the remove callback now, convert them to .remove_new(), too. Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Reviewed-by: Michal Kubiak <michal.kubiak@intel.com> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
156 lines
3.7 KiB
C
156 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Adaptrum Anarion DWMAC glue layer
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*
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* Copyright (C) 2017, Adaptrum, Inc.
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* (Written by Alexandru Gagniuc <alex.g at adaptrum.com> for Adaptrum, Inc.)
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*/
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_net.h>
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#include <linux/stmmac.h>
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#include "stmmac.h"
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#include "stmmac_platform.h"
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#define GMAC_RESET_CONTROL_REG 0
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#define GMAC_SW_CONFIG_REG 4
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#define GMAC_CONFIG_INTF_SEL_MASK (0x7 << 0)
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#define GMAC_CONFIG_INTF_RGMII (0x1 << 0)
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struct anarion_gmac {
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void __iomem *ctl_block;
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uint32_t phy_intf_sel;
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};
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static uint32_t gmac_read_reg(struct anarion_gmac *gmac, uint8_t reg)
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{
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return readl(gmac->ctl_block + reg);
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};
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static void gmac_write_reg(struct anarion_gmac *gmac, uint8_t reg, uint32_t val)
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{
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writel(val, gmac->ctl_block + reg);
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}
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static int anarion_gmac_init(struct platform_device *pdev, void *priv)
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{
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uint32_t sw_config;
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struct anarion_gmac *gmac = priv;
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/* Reset logic, configure interface mode, then release reset. SIMPLE! */
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gmac_write_reg(gmac, GMAC_RESET_CONTROL_REG, 1);
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sw_config = gmac_read_reg(gmac, GMAC_SW_CONFIG_REG);
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sw_config &= ~GMAC_CONFIG_INTF_SEL_MASK;
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sw_config |= (gmac->phy_intf_sel & GMAC_CONFIG_INTF_SEL_MASK);
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gmac_write_reg(gmac, GMAC_SW_CONFIG_REG, sw_config);
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gmac_write_reg(gmac, GMAC_RESET_CONTROL_REG, 0);
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return 0;
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}
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static void anarion_gmac_exit(struct platform_device *pdev, void *priv)
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{
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struct anarion_gmac *gmac = priv;
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gmac_write_reg(gmac, GMAC_RESET_CONTROL_REG, 1);
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}
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static struct anarion_gmac *anarion_config_dt(struct platform_device *pdev)
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{
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struct anarion_gmac *gmac;
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phy_interface_t phy_mode;
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void __iomem *ctl_block;
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int err;
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ctl_block = devm_platform_ioremap_resource(pdev, 1);
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if (IS_ERR(ctl_block)) {
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err = PTR_ERR(ctl_block);
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dev_err(&pdev->dev, "Cannot get reset region (%d)!\n", err);
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return ERR_PTR(err);
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}
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gmac = devm_kzalloc(&pdev->dev, sizeof(*gmac), GFP_KERNEL);
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if (!gmac)
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return ERR_PTR(-ENOMEM);
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gmac->ctl_block = ctl_block;
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err = of_get_phy_mode(pdev->dev.of_node, &phy_mode);
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if (err)
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return ERR_PTR(err);
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switch (phy_mode) {
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case PHY_INTERFACE_MODE_RGMII:
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fallthrough;
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case PHY_INTERFACE_MODE_RGMII_ID:
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case PHY_INTERFACE_MODE_RGMII_RXID:
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case PHY_INTERFACE_MODE_RGMII_TXID:
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gmac->phy_intf_sel = GMAC_CONFIG_INTF_RGMII;
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break;
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default:
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dev_err(&pdev->dev, "Unsupported phy-mode (%d)\n",
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phy_mode);
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return ERR_PTR(-ENOTSUPP);
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}
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return gmac;
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}
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static int anarion_dwmac_probe(struct platform_device *pdev)
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{
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int ret;
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struct anarion_gmac *gmac;
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struct plat_stmmacenet_data *plat_dat;
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struct stmmac_resources stmmac_res;
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ret = stmmac_get_platform_resources(pdev, &stmmac_res);
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if (ret)
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return ret;
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gmac = anarion_config_dt(pdev);
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if (IS_ERR(gmac))
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return PTR_ERR(gmac);
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plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
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if (IS_ERR(plat_dat))
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return PTR_ERR(plat_dat);
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plat_dat->init = anarion_gmac_init;
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plat_dat->exit = anarion_gmac_exit;
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anarion_gmac_init(pdev, gmac);
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plat_dat->bsp_priv = gmac;
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ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
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if (ret) {
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stmmac_remove_config_dt(pdev, plat_dat);
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return ret;
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}
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return 0;
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}
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static const struct of_device_id anarion_dwmac_match[] = {
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{ .compatible = "adaptrum,anarion-gmac" },
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{ }
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};
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MODULE_DEVICE_TABLE(of, anarion_dwmac_match);
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static struct platform_driver anarion_dwmac_driver = {
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.probe = anarion_dwmac_probe,
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.remove_new = stmmac_pltfr_remove,
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.driver = {
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.name = "anarion-dwmac",
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.pm = &stmmac_pltfr_pm_ops,
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.of_match_table = anarion_dwmac_match,
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},
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};
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module_platform_driver(anarion_dwmac_driver);
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MODULE_DESCRIPTION("Adaptrum Anarion DWMAC specific glue layer");
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MODULE_AUTHOR("Alexandru Gagniuc <mr.nuke.me@gmail.com>");
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MODULE_LICENSE("GPL v2");
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