From: Sergei Shtylyov Date: Tue, 18 Feb 2014 00:12:43 +0000 (+0300) Subject: sh_eth: add device tree support X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b356e978e92fccd17a3e4620a4821bdbfb706c1a;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git sh_eth: add device tree support Add support of the device tree probing for the Renesas SH-Mobile SoCs documenting the device tree binding as necessary. This work is loosely based on the original patch by Nobuhiro Iwamatsu . Signed-off-by: Sergei Shtylyov Signed-off-by: David S. Miller --- diff --git a/Documentation/devicetree/bindings/net/sh_eth.txt b/Documentation/devicetree/bindings/net/sh_eth.txt new file mode 100644 index 000000000000..e7106b50dbdc --- /dev/null +++ b/Documentation/devicetree/bindings/net/sh_eth.txt @@ -0,0 +1,55 @@ +* Renesas Electronics SH EtherMAC + +This file provides information on what the device node for the SH EtherMAC +interface contains. + +Required properties: +- compatible: "renesas,gether-r8a7740" if the device is a part of R8A7740 SoC. + "renesas,ether-r8a7778" if the device is a part of R8A7778 SoC. + "renesas,ether-r8a7779" if the device is a part of R8A7779 SoC. + "renesas,ether-r8a7790" if the device is a part of R8A7790 SoC. + "renesas,ether-r8a7791" if the device is a part of R8A7791 SoC. + "renesas,ether-r7s72100" if the device is a part of R7S72100 SoC. +- reg: offset and length of (1) the E-DMAC/feLic register block (required), + (2) the TSU register block (optional). +- interrupts: interrupt specifier for the sole interrupt. +- phy-mode: see ethernet.txt file in the same directory. +- phy-handle: see ethernet.txt file in the same directory. +- #address-cells: number of address cells for the MDIO bus, must be equal to 1. +- #size-cells: number of size cells on the MDIO bus, must be equal to 0. +- clocks: clock phandle and specifier pair. +- pinctrl-0: phandle, referring to a default pin configuration node. + +Optional properties: +- interrupt-parent: the phandle for the interrupt controller that services + interrupts for this device. +- pinctrl-names: pin configuration state name ("default"). +- renesas,no-ether-link: boolean, specify when a board does not provide a proper + Ether LINK signal. +- renesas,ether-link-active-low: boolean, specify when the Ether LINK signal is + active-low instead of normal active-high. + +Example (Lager board): + + ethernet@ee700000 { + compatible = "renesas,ether-r8a7790"; + reg = <0 0xee700000 0 0x400>; + interrupt-parent = <&gic>; + interrupts = <0 162 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp8_clks R8A7790_CLK_ETHER>; + phy-mode = "rmii"; + phy-handle = <&phy1>; + pinctrl-0 = <ðer_pins>; + pinctrl-names = "default"; + renesas,ether-link-active-low; + #address-cells = <1>; + #size-cells = <0>; + + phy1: ethernet-phy@1 { + reg = <1>; + interrupt-parent = <&irqc0>; + interrupts = <0 IRQ_TYPE_LEVEL_LOW>; + pinctrl-0 = <&phy1_pins>; + pinctrl-names = "default"; + }; + }; diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 88b40b514cb2..b1e6554f44bc 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1,8 +1,8 @@ /* SuperH Ethernet device driver * * Copyright (C) 2006-2012 Nobuhiro Iwamatsu - * Copyright (C) 2008-2013 Renesas Solutions Corp. - * Copyright (C) 2013 Cogent Embedded, Inc. + * Copyright (C) 2008-2014 Renesas Solutions Corp. + * Copyright (C) 2013-2014 Cogent Embedded, Inc. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, @@ -27,6 +27,10 @@ #include #include #include +#include +#include +#include +#include #include #include #include @@ -2710,6 +2714,54 @@ static const struct net_device_ops sh_eth_netdev_ops_tsu = { .ndo_change_mtu = eth_change_mtu, }; +#ifdef CONFIG_OF +static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev) +{ + struct device_node *np = dev->of_node; + struct sh_eth_plat_data *pdata; + struct device_node *phy; + const char *mac_addr; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return NULL; + + pdata->phy_interface = of_get_phy_mode(np); + + phy = of_parse_phandle(np, "phy-handle", 0); + if (of_property_read_u32(phy, "reg", &pdata->phy)) + return NULL; + pdata->phy_irq = irq_of_parse_and_map(phy, 0); + + mac_addr = of_get_mac_address(np); + if (mac_addr) + memcpy(pdata->mac_addr, mac_addr, ETH_ALEN); + + pdata->no_ether_link = + of_property_read_bool(np, "renesas,no-ether-link"); + pdata->ether_link_active_low = + of_property_read_bool(np, "renesas,ether-link-active-low"); + + return pdata; +} + +static const struct of_device_id sh_eth_match_table[] = { + { .compatible = "renesas,gether-r8a7740", .data = &r8a7740_data }, + { .compatible = "renesas,ether-r8a7778", .data = &r8a777x_data }, + { .compatible = "renesas,ether-r8a7779", .data = &r8a777x_data }, + { .compatible = "renesas,ether-r8a7790", .data = &r8a779x_data }, + { .compatible = "renesas,ether-r8a7791", .data = &r8a779x_data }, + { .compatible = "renesas,ether-r7s72100", .data = &r7s72100_data }, + { } +}; +MODULE_DEVICE_TABLE(of, sh_eth_match_table); +#else +static inline struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev) +{ + return NULL; +} +#endif + static int sh_eth_drv_probe(struct platform_device *pdev) { int ret, devno = 0; @@ -2763,6 +2815,8 @@ static int sh_eth_drv_probe(struct platform_device *pdev) pm_runtime_enable(&pdev->dev); pm_runtime_resume(&pdev->dev); + if (pdev->dev.of_node) + pd = sh_eth_parse_dt(&pdev->dev); if (!pd) { dev_err(&pdev->dev, "no platform data\n"); ret = -EINVAL; @@ -2778,7 +2832,15 @@ static int sh_eth_drv_probe(struct platform_device *pdev) mdp->ether_link_active_low = pd->ether_link_active_low; /* set cpu data */ - mdp->cd = (struct sh_eth_cpu_data *)id->driver_data; + if (id) { + mdp->cd = (struct sh_eth_cpu_data *)id->driver_data; + } else { + const struct of_device_id *match; + + match = of_match_device(of_match_ptr(sh_eth_match_table), + &pdev->dev); + mdp->cd = (struct sh_eth_cpu_data *)match->data; + } mdp->reg_offset = sh_eth_get_register_offset(mdp->cd->register_type); sh_eth_set_default_cpu_data(mdp->cd); @@ -2920,6 +2982,7 @@ static struct platform_driver sh_eth_driver = { .driver = { .name = CARDNAME, .pm = SH_ETH_PM_OPS, + .of_match_table = of_match_ptr(sh_eth_match_table), }, };