/* * 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 #define OMAP1_INT_I2C (32 + 4) 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 = OMAP1_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);