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4d0ce62c0a
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>
322 lines
6.9 KiB
C
322 lines
6.9 KiB
C
/*
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* GPR board platform device registration (Au1550)
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*
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* Copyright (C) 2010 Wolfgang Grandegger <wg@denx.de>
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/pm.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <linux/leds.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/i2c-gpio.h>
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#include <linux/gpio/machine.h>
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#include <asm/bootinfo.h>
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#include <asm/idle.h>
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#include <asm/reboot.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/gpio-au1000.h>
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#include <prom.h>
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const char *get_system_type(void)
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{
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return "GPR";
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}
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void __init prom_init(void)
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{
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unsigned char *memsize_str;
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unsigned long memsize;
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prom_argc = fw_arg0;
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prom_argv = (char **)fw_arg1;
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prom_envp = (char **)fw_arg2;
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prom_init_cmdline();
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memsize_str = prom_getenv("memsize");
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if (!memsize_str || kstrtoul(memsize_str, 0, &memsize))
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memsize = 0x04000000;
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add_memory_region(0, memsize, BOOT_MEM_RAM);
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}
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void prom_putchar(unsigned char c)
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{
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alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
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}
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static void gpr_reset(char *c)
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{
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/* switch System-LED to orange (red# and green# on) */
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alchemy_gpio_direction_output(4, 0);
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alchemy_gpio_direction_output(5, 0);
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/* trigger watchdog to reset board in 200ms */
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printk(KERN_EMERG "Triggering watchdog soft reset...\n");
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raw_local_irq_disable();
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alchemy_gpio_direction_output(1, 0);
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udelay(1);
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alchemy_gpio_set_value(1, 1);
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while (1)
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cpu_wait();
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}
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static void gpr_power_off(void)
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{
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while (1)
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cpu_wait();
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}
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void __init board_setup(void)
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{
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printk(KERN_INFO "Trapeze ITS GPR board\n");
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pm_power_off = gpr_power_off;
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_machine_halt = gpr_power_off;
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_machine_restart = gpr_reset;
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/* Enable UART1/3 */
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alchemy_uart_enable(AU1000_UART3_PHYS_ADDR);
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alchemy_uart_enable(AU1000_UART1_PHYS_ADDR);
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/* Take away Reset of UMTS-card */
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alchemy_gpio_direction_output(215, 1);
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}
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/*
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* Watchdog
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*/
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static struct resource gpr_wdt_resource[] = {
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[0] = {
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.start = 1,
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.end = 1,
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.name = "gpr-adm6320-wdt",
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.flags = IORESOURCE_IRQ,
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}
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};
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static struct platform_device gpr_wdt_device = {
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.name = "adm6320-wdt",
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.id = 0,
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.num_resources = ARRAY_SIZE(gpr_wdt_resource),
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.resource = gpr_wdt_resource,
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};
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/*
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* FLASH
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*
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* 0x00000000-0x00200000 : "kernel"
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* 0x00200000-0x00a00000 : "rootfs"
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* 0x01d00000-0x01f00000 : "config"
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* 0x01c00000-0x01d00000 : "yamon"
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* 0x01d00000-0x01d40000 : "yamon env vars"
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* 0x00000000-0x00a00000 : "kernel+rootfs"
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*/
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static struct mtd_partition gpr_mtd_partitions[] = {
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{
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.name = "kernel",
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.size = 0x00200000,
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.offset = 0,
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},
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{
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.name = "rootfs",
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.size = 0x00800000,
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.offset = MTDPART_OFS_APPEND,
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.mask_flags = MTD_WRITEABLE,
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},
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{
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.name = "config",
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.size = 0x00200000,
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.offset = 0x01d00000,
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},
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{
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.name = "yamon",
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.size = 0x00100000,
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.offset = 0x01c00000,
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},
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{
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.name = "yamon env vars",
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.size = 0x00040000,
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.offset = MTDPART_OFS_APPEND,
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},
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{
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.name = "kernel+rootfs",
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.size = 0x00a00000,
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.offset = 0,
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},
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};
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static struct physmap_flash_data gpr_flash_data = {
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.width = 4,
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.nr_parts = ARRAY_SIZE(gpr_mtd_partitions),
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.parts = gpr_mtd_partitions,
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};
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static struct resource gpr_mtd_resource = {
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.start = 0x1e000000,
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.end = 0x1fffffff,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device gpr_mtd_device = {
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.name = "physmap-flash",
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.dev = {
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.platform_data = &gpr_flash_data,
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},
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.num_resources = 1,
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.resource = &gpr_mtd_resource,
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};
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/*
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* LEDs
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*/
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static struct gpio_led gpr_gpio_leds[] = {
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{ /* green */
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.name = "gpr:green",
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.gpio = 4,
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.active_low = 1,
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},
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{ /* red */
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.name = "gpr:red",
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.gpio = 5,
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.active_low = 1,
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}
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};
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static struct gpio_led_platform_data gpr_led_data = {
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.num_leds = ARRAY_SIZE(gpr_gpio_leds),
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.leds = gpr_gpio_leds,
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};
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static struct platform_device gpr_led_devices = {
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.name = "leds-gpio",
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.id = -1,
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.dev = {
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.platform_data = &gpr_led_data,
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}
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};
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/*
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* I2C
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*/
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static struct gpiod_lookup_table gpr_i2c_gpiod_table = {
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.dev_id = "i2c-gpio",
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.table = {
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/*
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* This should be on "GPIO2" which has base at 200 so
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* the global numbers 209 and 210 should correspond to
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* local offsets 9 and 10.
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*/
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GPIO_LOOKUP_IDX("alchemy-gpio2", 9, NULL, 0,
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GPIO_ACTIVE_HIGH),
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GPIO_LOOKUP_IDX("alchemy-gpio2", 10, NULL, 1,
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GPIO_ACTIVE_HIGH),
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},
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};
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static struct i2c_gpio_platform_data gpr_i2c_data = {
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/*
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* The open drain mode is hardwired somewhere or an electrical
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* property of the alchemy GPIO controller.
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*/
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.sda_is_open_drain = 1,
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.scl_is_open_drain = 1,
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.udelay = 2, /* ~100 kHz */
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.timeout = HZ,
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};
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static struct platform_device gpr_i2c_device = {
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.name = "i2c-gpio",
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.id = -1,
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.dev.platform_data = &gpr_i2c_data,
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};
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static struct i2c_board_info gpr_i2c_info[] __initdata = {
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{
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I2C_BOARD_INFO("lm83", 0x18),
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}
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};
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static struct resource alchemy_pci_host_res[] = {
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[0] = {
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.start = AU1500_PCI_PHYS_ADDR,
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.end = AU1500_PCI_PHYS_ADDR + 0xfff,
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.flags = IORESOURCE_MEM,
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},
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};
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static int gpr_map_pci_irq(const struct pci_dev *d, u8 slot, u8 pin)
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{
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if ((slot == 0) && (pin == 1))
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return AU1550_PCI_INTA;
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else if ((slot == 0) && (pin == 2))
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return AU1550_PCI_INTB;
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return 0xff;
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}
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static struct alchemy_pci_platdata gpr_pci_pd = {
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.board_map_irq = gpr_map_pci_irq,
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.pci_cfg_set = PCI_CONFIG_AEN | PCI_CONFIG_R2H | PCI_CONFIG_R1H |
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PCI_CONFIG_CH |
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#if defined(__MIPSEB__)
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PCI_CONFIG_SIC_HWA_DAT | PCI_CONFIG_SM,
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#else
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0,
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#endif
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};
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static struct platform_device gpr_pci_host_dev = {
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.dev.platform_data = &gpr_pci_pd,
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.name = "alchemy-pci",
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.id = 0,
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.num_resources = ARRAY_SIZE(alchemy_pci_host_res),
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.resource = alchemy_pci_host_res,
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};
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static struct platform_device *gpr_devices[] __initdata = {
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&gpr_wdt_device,
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&gpr_mtd_device,
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&gpr_i2c_device,
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&gpr_led_devices,
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};
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static int __init gpr_pci_init(void)
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{
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return platform_device_register(&gpr_pci_host_dev);
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}
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/* must be arch_initcall; MIPS PCI scans busses in a subsys_initcall */
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arch_initcall(gpr_pci_init);
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static int __init gpr_dev_init(void)
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{
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gpiod_add_lookup_table(&gpr_i2c_gpiod_table);
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i2c_register_board_info(0, gpr_i2c_info, ARRAY_SIZE(gpr_i2c_info));
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return platform_add_devices(gpr_devices, ARRAY_SIZE(gpr_devices));
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}
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device_initcall(gpr_dev_init);
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