f230d3f53d
The AT91 I2C driver is currently marked as "broken" due to hardware issues. This patch enables AT91-based platforms to also use the bitbanged GPIO for I2C. This updates platform setup logic (setting up an i2c-gpio device using the same pins as the i2c-at91 device, unless only the BROKEN driver is enabled). Also make use of the new-style initialization of I2C devices using i2c_register_board_info(). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
205 lines
4.4 KiB
C
205 lines
4.4 KiB
C
/*
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* Copyright (C) 2005 SAN People
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* Copyright (C) 2007 Atmel Corporation
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/fb.h>
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#include <linux/clk.h>
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#include <video/atmel_lcdc.h>
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#include <asm/hardware.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/irq.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 <asm/arch/board.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/at91sam926x_mc.h>
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#include "generic.h"
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/*
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* Serial port configuration.
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* 0 .. 3 = USART0 .. USART3
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* 4 = DBGU
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*/
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static struct at91_uart_config __initdata ek_uart_config = {
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.console_tty = 0, /* ttyS0 */
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.nr_tty = 2,
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.tty_map = { 4, 0, -1, -1, -1 } /* ttyS0, ..., ttyS4 */
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};
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static void __init ek_map_io(void)
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{
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/* Initialize processor: 12.000 MHz crystal */
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at91sam9rl_initialize(12000000);
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/* Setup the serial ports and console */
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at91_init_serial(&ek_uart_config);
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}
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static void __init ek_init_irq(void)
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{
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at91sam9rl_init_interrupts(NULL);
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}
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/*
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* MCI (SD/MMC)
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*/
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static struct at91_mmc_data __initdata ek_mmc_data = {
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.wire4 = 1,
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.det_pin = AT91_PIN_PA15,
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// .wp_pin = ... not connected
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// .vcc_pin = ... not connected
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};
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/*
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* NAND flash
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*/
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static struct mtd_partition __initdata ek_nand_partition[] = {
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{
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.name = "Partition 1",
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.offset = 0,
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.size = 256 * 1024,
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},
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{
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.name = "Partition 2",
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.offset = 256 * 1024 ,
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.size = MTDPART_SIZ_FULL,
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},
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};
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static struct mtd_partition * __init nand_partitions(int size, int *num_partitions)
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{
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*num_partitions = ARRAY_SIZE(ek_nand_partition);
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return ek_nand_partition;
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}
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static struct at91_nand_data __initdata ek_nand_data = {
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.ale = 21,
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.cle = 22,
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// .det_pin = ... not connected
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.rdy_pin = AT91_PIN_PD17,
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.enable_pin = AT91_PIN_PB6,
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.partition_info = nand_partitions,
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.bus_width_16 = 0,
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};
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/*
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* SPI devices
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*/
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static struct spi_board_info ek_spi_devices[] = {
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{ /* DataFlash chip */
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.modalias = "mtd_dataflash",
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.chip_select = 0,
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.max_speed_hz = 15 * 1000 * 1000,
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.bus_num = 0,
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},
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};
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/*
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* LCD Controller
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*/
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#if defined(CONFIG_FB_ATMEL) || defined(CONFIG_FB_ATMEL_MODULE)
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static struct fb_videomode at91_tft_vga_modes[] = {
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{
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.name = "TX09D50VM1CCA @ 60",
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.refresh = 60,
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.xres = 240, .yres = 320,
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.pixclock = KHZ2PICOS(4965),
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.left_margin = 1, .right_margin = 33,
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.upper_margin = 1, .lower_margin = 0,
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.hsync_len = 5, .vsync_len = 1,
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.sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
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.vmode = FB_VMODE_NONINTERLACED,
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},
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};
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static struct fb_monspecs at91fb_default_monspecs = {
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.manufacturer = "HIT",
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.monitor = "TX09D50VM1CCA",
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.modedb = at91_tft_vga_modes,
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.modedb_len = ARRAY_SIZE(at91_tft_vga_modes),
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.hfmin = 15000,
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.hfmax = 64000,
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.vfmin = 50,
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.vfmax = 150,
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};
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#define AT91SAM9RL_DEFAULT_LCDCON2 (ATMEL_LCDC_MEMOR_LITTLE \
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| ATMEL_LCDC_DISTYPE_TFT \
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| ATMEL_LCDC_CLKMOD_ALWAYSACTIVE)
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static void at91_lcdc_power_control(int on)
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{
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if (on)
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at91_set_gpio_value(AT91_PIN_PA30, 0); /* power up */
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else
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at91_set_gpio_value(AT91_PIN_PA30, 1); /* power down */
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}
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/* Driver datas */
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static struct atmel_lcdfb_info __initdata ek_lcdc_data = {
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.default_bpp = 16,
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.default_dmacon = ATMEL_LCDC_DMAEN,
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.default_lcdcon2 = AT91SAM9RL_DEFAULT_LCDCON2,
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.default_monspecs = &at91fb_default_monspecs,
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.atmel_lcdfb_power_control = at91_lcdc_power_control,
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.guard_time = 1,
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};
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#else
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static struct atmel_lcdfb_info __initdata ek_lcdc_data;
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#endif
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static void __init ek_board_init(void)
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{
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/* Serial */
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at91_add_device_serial();
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/* I2C */
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at91_add_device_i2c(NULL, 0);
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/* NAND */
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at91_add_device_nand(&ek_nand_data);
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/* SPI */
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at91_add_device_spi(ek_spi_devices, ARRAY_SIZE(ek_spi_devices));
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/* MMC */
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at91_add_device_mmc(0, &ek_mmc_data);
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/* LCD Controller */
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at91_add_device_lcdc(&ek_lcdc_data);
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}
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MACHINE_START(AT91SAM9RLEK, "Atmel AT91SAM9RL-EK")
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/* Maintainer: Atmel */
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.phys_io = AT91_BASE_SYS,
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.io_pg_offst = (AT91_VA_BASE_SYS >> 18) & 0xfffc,
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.boot_params = AT91_SDRAM_BASE + 0x100,
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.timer = &at91sam926x_timer,
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.map_io = ek_map_io,
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.init_irq = ek_init_irq,
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.init_machine = ek_board_init,
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MACHINE_END
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