99 строки
2.4 KiB
C
99 строки
2.4 KiB
C
/*
|
|
* Helper module for board specific I2C bus registration
|
|
*
|
|
* Copyright (C) 2009 Nokia Corporation.
|
|
*
|
|
* 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.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/i2c-omap.h>
|
|
#include <mach/mux.h>
|
|
#include "soc.h"
|
|
|
|
#include <plat/i2c.h>
|
|
|
|
#define OMAP_I2C_SIZE 0x3f
|
|
#define OMAP1_I2C_BASE 0xfffb3800
|
|
|
|
static const char name[] = "omap_i2c";
|
|
|
|
static struct resource i2c_resources[2] = {
|
|
};
|
|
|
|
static struct platform_device omap_i2c_devices[1] = {
|
|
};
|
|
|
|
static void __init omap1_i2c_mux_pins(int bus_id)
|
|
{
|
|
if (cpu_is_omap7xx()) {
|
|
omap_cfg_reg(I2C_7XX_SDA);
|
|
omap_cfg_reg(I2C_7XX_SCL);
|
|
} else {
|
|
omap_cfg_reg(I2C_SDA);
|
|
omap_cfg_reg(I2C_SCL);
|
|
}
|
|
}
|
|
|
|
int __init omap_i2c_add_bus(struct omap_i2c_bus_platform_data *pdata,
|
|
int bus_id)
|
|
{
|
|
struct platform_device *pdev;
|
|
struct resource *res;
|
|
|
|
if (bus_id > 1)
|
|
return -EINVAL;
|
|
|
|
omap1_i2c_mux_pins(bus_id);
|
|
|
|
pdev = &omap_i2c_devices[bus_id - 1];
|
|
pdev->id = bus_id;
|
|
pdev->name = name;
|
|
pdev->num_resources = ARRAY_SIZE(i2c_resources);
|
|
res = i2c_resources;
|
|
res[0].start = OMAP1_I2C_BASE;
|
|
res[0].end = res[0].start + OMAP_I2C_SIZE;
|
|
res[0].flags = IORESOURCE_MEM;
|
|
res[1].start = INT_I2C;
|
|
res[1].flags = IORESOURCE_IRQ;
|
|
pdev->resource = res;
|
|
|
|
/* all OMAP1 have IP version 1 register set */
|
|
pdata->rev = OMAP_I2C_IP_VERSION_1;
|
|
|
|
/* all OMAP1 I2C are implemented like this */
|
|
pdata->flags = OMAP_I2C_FLAG_NO_FIFO |
|
|
OMAP_I2C_FLAG_SIMPLE_CLOCK |
|
|
OMAP_I2C_FLAG_16BIT_DATA_REG |
|
|
OMAP_I2C_FLAG_ALWAYS_ARMXOR_CLK;
|
|
|
|
/* how the cpu bus is wired up differs for 7xx only */
|
|
|
|
if (cpu_is_omap7xx())
|
|
pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_1;
|
|
else
|
|
pdata->flags |= OMAP_I2C_FLAG_BUS_SHIFT_2;
|
|
|
|
pdev->dev.platform_data = pdata;
|
|
|
|
return platform_device_register(pdev);
|
|
}
|
|
|
|
static int __init omap_i2c_cmdline(void)
|
|
{
|
|
return omap_register_i2c_bus_cmdline();
|
|
}
|
|
subsys_initcall(omap_i2c_cmdline);
|