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![Linus Walleij](/assets/img/avatar_default.png)
We now handle the open drain mode internally in the I2C GPIO driver, but we will get warnings from the gpiolib that we override the default mode of the line so it becomes open drain. We can fix all in-kernel users by simply passing the right flag along in the descriptor table, and we already touched all of these files in the series so let's just tidy it up. Cc: Steven Miao <realmz6@gmail.com> Cc: Ralf Baechle <ralf@linux-mips.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Wu, Aaron <Aaron.Wu@analog.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
241 lines
5.6 KiB
C
241 lines
5.6 KiB
C
/*
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* arch/arm/mach-ks8695/board-acs5k.c
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*
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* Brivo Systems LLC, ACS-5000 Master Board
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*
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* Copyright 2008 Simtec Electronics
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* Daniel Silverstone <dsilvers@simtec.co.uk>
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/gpio.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/gpio/machine.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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#include <linux/i2c-gpio.h>
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#include <linux/platform_data/pca953x.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/mtd/physmap.h>
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#include <linux/mtd/partitions.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include "devices.h"
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#include <mach/gpio-ks8695.h>
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#include "generic.h"
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static struct gpiod_lookup_table acs5k_i2c_gpiod_table = {
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.dev_id = "i2c-gpio",
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.table = {
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GPIO_LOOKUP_IDX("KS8695", 4, NULL, 0,
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GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
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GPIO_LOOKUP_IDX("KS8695", 5, NULL, 1,
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GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
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},
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};
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static struct i2c_gpio_platform_data acs5k_i2c_device_platdata = {
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.udelay = 10,
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};
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static struct platform_device acs5k_i2c_device = {
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.name = "i2c-gpio",
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.id = -1,
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.num_resources = 0,
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.resource = NULL,
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.dev = {
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.platform_data = &acs5k_i2c_device_platdata,
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},
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};
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static int acs5k_pca9555_setup(struct i2c_client *client,
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unsigned gpio_base, unsigned ngpio,
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void *context)
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{
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static int acs5k_gpio_value[] = {
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-1, -1, -1, -1, -1, -1, -1, 0, 1, 1, -1, 0, 1, 0, -1, -1
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};
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int n;
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for (n = 0; n < ARRAY_SIZE(acs5k_gpio_value); ++n) {
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gpio_request(gpio_base + n, "ACS-5000 GPIO Expander");
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if (acs5k_gpio_value[n] < 0)
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gpio_direction_input(gpio_base + n);
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else
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gpio_direction_output(gpio_base + n,
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acs5k_gpio_value[n]);
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gpio_export(gpio_base + n, 0); /* Export, direction locked down */
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}
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return 0;
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}
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static struct pca953x_platform_data acs5k_i2c_pca9555_platdata = {
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.gpio_base = 16, /* Start directly after the CPU's GPIO */
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.invert = 0, /* Do not invert */
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.setup = acs5k_pca9555_setup,
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};
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static struct i2c_board_info acs5k_i2c_devs[] __initdata = {
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{
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I2C_BOARD_INFO("pcf8563", 0x51),
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},
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{
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I2C_BOARD_INFO("pca9555", 0x20),
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.platform_data = &acs5k_i2c_pca9555_platdata,
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},
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};
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static void acs5k_i2c_init(void)
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{
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/* The gpio interface */
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gpiod_add_lookup_table(&acs5k_i2c_gpiod_table);
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platform_device_register(&acs5k_i2c_device);
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/* I2C devices */
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i2c_register_board_info(0, acs5k_i2c_devs,
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ARRAY_SIZE(acs5k_i2c_devs));
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}
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static struct mtd_partition acs5k_nor_partitions[] = {
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[0] = {
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.name = "Boot Agent and config",
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.size = SZ_256K,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE,
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},
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[1] = {
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.name = "Kernel",
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.size = SZ_1M,
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.offset = SZ_256K,
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},
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[2] = {
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.name = "SquashFS1",
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.size = SZ_2M,
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.offset = SZ_256K + SZ_1M,
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},
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[3] = {
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.name = "SquashFS2",
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.size = SZ_4M + SZ_2M,
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.offset = SZ_256K + SZ_1M + SZ_2M,
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},
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[4] = {
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.name = "Data",
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.size = SZ_16M + SZ_4M + SZ_2M + SZ_512K, /* 22.5 MB */
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.offset = SZ_256K + SZ_8M + SZ_1M,
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}
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};
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static struct physmap_flash_data acs5k_nor_pdata = {
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.width = 4,
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.nr_parts = ARRAY_SIZE(acs5k_nor_partitions),
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.parts = acs5k_nor_partitions,
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};
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static struct resource acs5k_nor_resource[] = {
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[0] = {
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.start = SZ_32M, /* We expect the bootloader to map
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* the flash here.
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*/
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.end = SZ_32M + SZ_16M - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = SZ_32M + SZ_16M,
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.end = SZ_32M + SZ_32M - SZ_256K - 1,
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.flags = IORESOURCE_MEM,
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}
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};
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static struct platform_device acs5k_device_nor = {
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.name = "physmap-flash",
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.id = -1,
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.num_resources = ARRAY_SIZE(acs5k_nor_resource),
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.resource = acs5k_nor_resource,
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.dev = {
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.platform_data = &acs5k_nor_pdata,
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},
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};
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static void __init acs5k_register_nor(void)
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{
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int ret;
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if (acs5k_nor_partitions[0].mask_flags == 0)
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printk(KERN_WARNING "Warning: Unprotecting bootloader and configuration partition\n");
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ret = platform_device_register(&acs5k_device_nor);
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if (ret < 0)
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printk(KERN_ERR "failed to register physmap-flash device\n");
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}
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static int __init acs5k_protection_setup(char *s)
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{
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/* We can't allocate anything here but we should be able
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* to trivially parse s and decide if we can protect the
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* bootloader partition or not
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*/
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if (strcmp(s, "no") == 0)
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acs5k_nor_partitions[0].mask_flags = 0;
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return 1;
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}
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__setup("protect_bootloader=", acs5k_protection_setup);
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static void __init acs5k_init_gpio(void)
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{
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int i;
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ks8695_register_gpios();
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for (i = 0; i < 4; ++i)
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gpio_request(i, "ACS5K IRQ");
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gpio_request(7, "ACS5K KS_FRDY");
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for (i = 8; i < 16; ++i)
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gpio_request(i, "ACS5K Unused");
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gpio_request(3, "ACS5K CAN Control");
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gpio_request(6, "ACS5K Heartbeat");
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gpio_direction_output(3, 1); /* Default CAN_RESET high */
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gpio_direction_output(6, 0); /* Default KS8695_ACTIVE low */
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gpio_export(3, 0); /* export CAN_RESET as output only */
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gpio_export(6, 0); /* export KS8695_ACTIVE as output only */
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}
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static void __init acs5k_init(void)
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{
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acs5k_init_gpio();
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/* Network device */
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ks8695_add_device_lan(); /* eth0 = LAN */
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ks8695_add_device_wan(); /* ethX = WAN */
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/* NOR devices */
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acs5k_register_nor();
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/* I2C bus */
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acs5k_i2c_init();
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}
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MACHINE_START(ACS5K, "Brivo Systems LLC ACS-5000 Master board")
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/* Maintainer: Simtec Electronics. */
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.atag_offset = 0x100,
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.map_io = ks8695_map_io,
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.init_irq = ks8695_init_irq,
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.init_machine = acs5k_init,
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.init_time = ks8695_timer_init,
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.restart = ks8695_restart,
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MACHINE_END
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