diff options
Diffstat (limited to 'arch/mips/pci/pci-lantiq.c')
| -rw-r--r-- | arch/mips/pci/pci-lantiq.c | 62 |
1 files changed, 22 insertions, 40 deletions
diff --git a/arch/mips/pci/pci-lantiq.c b/arch/mips/pci/pci-lantiq.c index cb1ef9984069..0e85839b8225 100644 --- a/arch/mips/pci/pci-lantiq.c +++ b/arch/mips/pci/pci-lantiq.c @@ -1,9 +1,7 @@ +// SPDX-License-Identifier: GPL-2.0-only /* - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. * - * Copyright (C) 2010 John Crispin <blogic@openwrt.org> + * Copyright (C) 2010 John Crispin <john@phrozen.org> */ #include <linux/types.h> @@ -11,17 +9,14 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> +#include <linux/gpio/consumer.h> #include <linux/mm.h> #include <linux/vmalloc.h> -#include <linux/module.h> #include <linux/clk.h> -#include <linux/of_platform.h> -#include <linux/of_gpio.h> -#include <linux/of_irq.h> +#include <linux/of.h> #include <linux/of_pci.h> +#include <linux/platform_device.h> -#include <asm/pci.h> -#include <asm/gpio.h> #include <asm/addrspace.h> #include <lantiq_soc.h> @@ -67,7 +62,7 @@ __iomem void *ltq_pci_mapped_cfg; static __iomem void *ltq_pci_membase; -static int reset_gpio; +static struct gpio_desc *reset_gpio; static struct clk *clk_pci, *clk_external; static struct resource pci_io_resource; static struct resource pci_mem_resource; @@ -100,6 +95,7 @@ static int ltq_pci_startup(struct platform_device *pdev) struct device_node *node = pdev->dev.of_node; const __be32 *req_mask, *bus_clk; u32 temp_buffer; + int error; /* get our clocks */ clk_pci = clk_get(&pdev->dev, NULL); @@ -122,23 +118,20 @@ static int ltq_pci_startup(struct platform_device *pdev) /* and enable the clocks */ clk_enable(clk_pci); - if (of_find_property(node, "lantiq,external-clock", NULL)) + if (of_property_read_bool(node, "lantiq,external-clock")) clk_enable(clk_external); else clk_disable(clk_external); /* setup reset gpio used by pci */ - reset_gpio = of_get_named_gpio(node, "gpio-reset", 0); - if (gpio_is_valid(reset_gpio)) { - int ret = devm_gpio_request(&pdev->dev, - reset_gpio, "pci-reset"); - if (ret) { - dev_err(&pdev->dev, - "failed to request gpio %d\n", reset_gpio); - return ret; - } - gpio_direction_output(reset_gpio, 1); + reset_gpio = devm_gpiod_get_optional(&pdev->dev, "reset", + GPIOD_OUT_LOW); + error = PTR_ERR_OR_ZERO(reset_gpio); + if (error) { + dev_err(&pdev->dev, "failed to request gpio: %d\n", error); + return error; } + gpiod_set_consumer_name(reset_gpio, "pci_reset"); /* enable auto-switching between PCI and EBU */ ltq_pci_w32(0xa, PCI_CR_CLK_CTRL); @@ -159,7 +152,7 @@ static int ltq_pci_startup(struct platform_device *pdev) temp_buffer &= ~0xf0000; /* enable internal arbiter */ temp_buffer |= (1 << INTERNAL_ARB_ENABLE_BIT); - /* enable internal PCI master reqest */ + /* enable internal PCI master request */ temp_buffer &= (~(3 << PCI_MASTER0_REQ_MASK_2BITS)); /* enable EBU request */ @@ -200,33 +193,24 @@ static int ltq_pci_startup(struct platform_device *pdev) ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_IEN) | 0x10, LTQ_EBU_PCC_IEN); /* toggle reset pin */ - if (gpio_is_valid(reset_gpio)) { - __gpio_set_value(reset_gpio, 0); + if (reset_gpio) { + gpiod_set_value_cansleep(reset_gpio, 1); wmb(); mdelay(1); - __gpio_set_value(reset_gpio, 1); + gpiod_set_value_cansleep(reset_gpio, 0); } return 0; } static int ltq_pci_probe(struct platform_device *pdev) { - struct resource *res_cfg, *res_bridge; - pci_clear_flags(PCI_PROBE_ONLY); - res_cfg = platform_get_resource(pdev, IORESOURCE_MEM, 0); - res_bridge = platform_get_resource(pdev, IORESOURCE_MEM, 1); - if (!res_cfg || !res_bridge) { - dev_err(&pdev->dev, "missing memory reources\n"); - return -EINVAL; - } - - ltq_pci_membase = devm_ioremap_resource(&pdev->dev, res_bridge); + ltq_pci_membase = devm_platform_get_and_ioremap_resource(pdev, 1, NULL); if (IS_ERR(ltq_pci_membase)) return PTR_ERR(ltq_pci_membase); - ltq_pci_mapped_cfg = devm_ioremap_resource(&pdev->dev, res_cfg); + ltq_pci_mapped_cfg = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); if (IS_ERR(ltq_pci_mapped_cfg)) return PTR_ERR(ltq_pci_mapped_cfg); @@ -241,18 +225,16 @@ static const struct of_device_id ltq_pci_match[] = { { .compatible = "lantiq,pci-xway" }, {}, }; -MODULE_DEVICE_TABLE(of, ltq_pci_match); static struct platform_driver ltq_pci_driver = { .probe = ltq_pci_probe, .driver = { .name = "pci-xway", - .owner = THIS_MODULE, .of_match_table = ltq_pci_match, }, }; -int __init pcibios_init(void) +static int __init pcibios_init(void) { int ret = platform_driver_register(<q_pci_driver); if (ret) |