Changes from V8 version: - Error numbers replaced to standard numbers from errno.h - Enable/Start and Disable/Stop functions merged into two Start and Stop functions - Removed all unused info about slave mode - Removed unused includes
Can somebody review functional part of this I2C driver? Because all other part is already acked by ARM Linux kernel guys. Signed-off-by: Darius Augulis <[EMAIL PROTECTED]> ---
Index: linux-2.6.26-rc9/arch/arm/mach-imx/mx1ads.c =================================================================== --- linux-2.6.26-rc9.orig/arch/arm/mach-imx/mx1ads.c +++ linux-2.6.26-rc9/arch/arm/mach-imx/mx1ads.c @@ -109,10 +109,31 @@ static struct platform_device imx_uart2_ } }; +static struct resource imx_i2c_resources[] = { + [0] = { + .start = 0x00217000, + .end = 0x00217010, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = I2C_INT, + .end = I2C_INT, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct platform_device imx_i2c_device = { + .name = "imx-i2c", + .id = 0, + .resource = imx_i2c_resources, + .num_resources = ARRAY_SIZE(imx_i2c_resources), +}; + static struct platform_device *devices[] __initdata = { &cs89x0_device, &imx_uart1_device, &imx_uart2_device, + &imx_i2c_device, }; #ifdef CONFIG_MMC_IMX Index: linux-2.6.26-rc9/drivers/i2c/busses/i2c-imx.c =================================================================== --- /dev/null +++ linux-2.6.26-rc9/drivers/i2c/busses/i2c-imx.c @@ -0,0 +1,602 @@ +/* + * Copyright (C) 2002 Motorola GSG-China + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + * USA. + * + * Author: + * Darius Augulis, Teltonika Inc. + * + * Desc.: + * Implementation of I2C Adapter/Algorithm Driver + * Driver for I2C Bus integrated in i.MXL, i.MX1 + * + * module parameters: + * - clkfreq: + * Sets the desired clock rate + * The default value is 100000 + * Max value is 400000 + * + * Derived from Motorola GSG China I2C example driver + * + * Copyright (C) 2005 Torsten Koschorrek <koschorrek at synertronixx.de + * Portions: + * Copyright (C) 2005 Matthias Blaschke <blaschke at synertronixx.de + * Copyright (C) 2007 RightHand Technologies, Inc. <adyeratrighthandtech.com> + * Copyright (C) 2008 Darius Augulis <darius.augulis at teltonika.lt> + * + */ + +/** Includes ******************************************************************* +*******************************************************************************/ + +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/i2c.h> +#include <linux/io.h> +#include <linux/platform_device.h> +#include <asm/arch/irqs.h> +#include <asm/arch/hardware.h> +#include <asm/arch/imx-regs.h> + +/** Defines ******************************************************************** +*******************************************************************************/ + +/* This will be the driver name the kernel reports */ +#define DRIVER_NAME "imx-i2c" + +/* Default values of module parameters */ +#define IMX_I2C_BIT_RATE 100000 /* 100kHz */ + +/* Timeouts */ +#define I2C_IMX_TIME_BUSY 2000 /* loop count */ +#define I2C_IMX_TIME_ACK 2000 /* loop count */ +#define I2C_IMX_TIME_TRX 5 /* seconds */ + +/* IMX I2C registers */ +#define IMX_I2C_IADR 0x00 /* i2c slave address */ +#define IMX_I2C_IFDR 0x04 /* i2c frequency divider */ +#define IMX_I2C_I2CR 0x08 /* i2c control */ +#define IMX_I2C_I2SR 0x0C /* i2c status */ +#define IMX_I2C_I2DR 0x10 /* i2c transfer data */ + +/* Bits of IMX I2C registers */ +#define I2SR_RXAK 0x01 +#define I2SR_IIF 0x02 +#define I2SR_SRW 0x04 +#define I2SR_IAL 0x10 +#define I2SR_IBB 0x20 +#define I2SR_IAAS 0x40 +#define I2SR_ICF 0x80 +#define I2CR_RSTA 0x04 +#define I2CR_TXAK 0x08 +#define I2CR_MTX 0x10 +#define I2CR_MSTA 0x20 +#define I2CR_IIEN 0x40 +#define I2CR_IEN 0x80 + +/** Variables ****************************************************************** +*******************************************************************************/ + +static unsigned int clkfreq = IMX_I2C_BIT_RATE; +static unsigned int disable_delay; /* Dummy delay */ + +/* + * sorted list of clock divider, register value pairs + * taken from table 26-5, p.26-9, Freescale i.MX + * Integrated Portable System Processor Reference Manual + * Document Number: MC9328MXLRM, Rev. 5.1, 06/2007 + * + * Duplicated divider values removed from list + */ + +static u16 __initdata i2c_imx_clk_divider [50] [2] = { + { 22, 0x20 }, { 24, 0x21 }, { 26, 0x22 }, { 28, 0x23 }, + { 30, 0x00 }, { 32, 0x24 }, { 36, 0x25 }, { 40, 0x26 }, + { 42, 0x03 }, { 44, 0x27 }, { 48, 0x28 }, { 52, 0x05 }, + { 56, 0x29 }, { 60, 0x06 }, { 64, 0x2A }, { 72, 0x2B }, + { 80, 0x2C }, { 88, 0x09 }, { 96, 0x2D }, { 104, 0x0A }, + { 112, 0x2E }, { 128, 0x2F }, { 144, 0x0C }, { 160, 0x30 }, + { 192, 0x31 }, { 224, 0x32 }, { 240, 0x0F }, { 256, 0x33 }, + { 288, 0x10 }, { 320, 0x34 }, { 384, 0x35 }, { 448, 0x36 }, + { 480, 0x13 }, { 512, 0x37 }, { 576, 0x14 }, { 640, 0x38 }, + { 768, 0x39 }, { 896, 0x3A }, { 960, 0x17 }, { 1024, 0x3B }, + { 1152, 0x18 }, { 1280, 0x3C }, { 1536, 0x3D }, { 1792, 0x3E }, + { 1920, 0x1B }, { 2048, 0x3F }, { 2304, 0x1C }, { 2560, 0x1D }, + { 3072, 0x1E }, { 3840, 0x1F } +}; + +struct imx_i2c_struct { + struct i2c_adapter adapter; + struct resource *res; + void __iomem *base; + int irq; + wait_queue_head_t queue; + unsigned long i2csr; +}; + +/** Functions for IMX I2C adapter driver *************************************** +*******************************************************************************/ + +static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx) +{ + unsigned int i = 0; + + dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); + + /* wait for bus not busy */ + for (i = 0; i < I2C_IMX_TIME_BUSY; i++) { + if (!(readb(i2c_imx->base + IMX_I2C_I2SR) & (I2SR_IBB | I2SR_IAL))) + return 0; + udelay(1); + } + dev_dbg(&i2c_imx->adapter.dev, "<%s> I2C bus is busy!\n", __func__); + return -EBUSY; +} + +static int i2c_imx_trx_complete(struct imx_i2c_struct *i2c_imx) +{ + int result; + + result = wait_event_interruptible_timeout(i2c_imx->queue, + (i2c_imx->i2csr & I2SR_IIF), I2C_IMX_TIME_TRX * HZ); + + if (unlikely(result < 0)) { + dev_dbg(&i2c_imx->adapter.dev, "<%s> result < 0!\n", __func__); + return result; + } else if (unlikely(!(i2c_imx->i2csr & I2SR_IIF))) { + dev_dbg(&i2c_imx->adapter.dev, "<%s> Timeout!\n", __func__); + return -ETIMEDOUT; + } + dev_dbg(&i2c_imx->adapter.dev, "<%s> TRX complete!\n", __func__); + i2c_imx->i2csr = 0; + return 0; +} + +static int i2c_imx_acked(struct imx_i2c_struct *i2c_imx) +{ + unsigned int i = 0; + + for (i = 0; i < I2C_IMX_TIME_ACK; i++) { + if (!(readb(i2c_imx->base + IMX_I2C_I2SR) & I2SR_RXAK)) { + dev_dbg(&i2c_imx->adapter.dev, + "<%s> ACK received\n", __func__); + return 0; + } + udelay(1); + } + dev_dbg(&i2c_imx->adapter.dev, "<%s> No ACK!\n", __func__); + return -EIO; /* No ACK */ +} + +static void i2c_imx_start(struct imx_i2c_struct *i2c_imx) +{ + unsigned int temp = 0; + + dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); + + /* Enable I2C controller */ + writeb(I2CR_IEN, i2c_imx->base + IMX_I2C_I2CR); + /* Start I2C transaction */ + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + temp |= I2CR_MSTA; + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); + temp |= (I2CR_IIEN | I2CR_MTX | I2CR_TXAK); + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); +} + +static void i2c_imx_stop(struct imx_i2c_struct *i2c_imx) +{ + unsigned int temp = 0; + + /* Stop I2C transaction */ + dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + temp &= ~I2CR_MSTA; + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); + /* setup chip registers to defaults */ + writeb(I2CR_IEN, i2c_imx->base + IMX_I2C_I2CR); + writeb(0, i2c_imx->base + IMX_I2C_I2SR); + /* + * This delay caused by an i.MXL hardware bug. + * If no (or too short) delay, no "STOP" bit will be generated. + */ + udelay(disable_delay); + /* Disable I2C controller */ + writeb(0, i2c_imx->base + IMX_I2C_I2CR); +} + +static void __init i2c_imx_set_clk(struct imx_i2c_struct *i2c_imx, unsigned int rate) +{ + unsigned int hclk; + unsigned int desired_div; + int i; + + /* Divider value calculation */ + hclk = imx_get_hclk(); + desired_div = (hclk + rate - 1) / rate; + if (desired_div < i2c_imx_clk_divider[0][0]) + i = 0; + else if (desired_div > i2c_imx_clk_divider[ARRAY_SIZE(i2c_imx_clk_divider)-1][0]) + i = ARRAY_SIZE(i2c_imx_clk_divider) - 1; + else + for (i = 0; i2c_imx_clk_divider[i][0] < desired_div; i++); + + /* Write divider value to register */ + writeb(i2c_imx_clk_divider[i][1], i2c_imx->base + IMX_I2C_IFDR); + + /* + * There dummy delay is calculated. + * It should be about one I2C clock period long. + * This delay is used in I2C bus disable function + * to fix chip hardware bug. + */ + disable_delay = (500000U * i2c_imx_clk_divider[i][0] + + (hclk / 2) - 1) / (hclk / 2); + + /* dev_dbg() can't be used, because adapter is not yet registered */ +#ifdef CONFIG_I2C_DEBUG_BUS + unsigned int sysclk; + sysclk = imx_get_system_clk(); + printk(KERN_DEBUG "I2C: <%s> SYSCLK=%d, HCLK=%d, REQ DIV=%d\n", + __func__, sysclk, hclk, desired_div); + printk(KERN_DEBUG "I2C: <%s> IFDR[IC]=0x%x, REAL DIV=%d\n", __func__, + i2c_imx_clk_divider[i][1], i2c_imx_clk_divider[i][0]); +#endif +} + +static irqreturn_t i2c_imx_isr(int irq, void *dev_id) +{ + struct imx_i2c_struct *i2c_imx = dev_id; + unsigned int temp; + + temp = readb(i2c_imx->base + IMX_I2C_I2SR); + if (temp & I2SR_IIF) { + /* save status register */ + i2c_imx->i2csr = temp; + temp &= ~I2SR_IIF; + writeb(temp, i2c_imx->base + IMX_I2C_I2SR); + wake_up_interruptible(&i2c_imx->queue); + } + + return IRQ_HANDLED; +} + +static int i2c_imx_write(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs) +{ + int i, result; + + dev_dbg(&i2c_imx->adapter.dev, "<%s> write slave address: addr=0x%x\n", + __func__, (msgs->addr)); + + /* write slave address */ + writeb((msgs->addr), i2c_imx->base + IMX_I2C_I2DR); + result = i2c_imx_trx_complete(i2c_imx); + if (result) + return result; + result = i2c_imx_acked(i2c_imx); + if (result) + return result; + dev_dbg(&i2c_imx->adapter.dev, "<%s> write data\n", __func__); + + /* write data */ + for (i = 0; i < msgs->len; i++) { + dev_dbg(&i2c_imx->adapter.dev, + "<%s> write byte: B%d=0x%X\n", __func__, + i, msgs->buf[i]); + writeb(msgs->buf[i], i2c_imx->base + IMX_I2C_I2DR); + result = i2c_imx_trx_complete(i2c_imx); + if (result) + return result; + result = i2c_imx_acked(i2c_imx); + if (result) + return result; + } + return 0; +} + +static int i2c_imx_read(struct imx_i2c_struct *i2c_imx, struct i2c_msg *msgs) +{ + int i, result; + unsigned int temp; + + dev_dbg(&i2c_imx->adapter.dev, + "<%s> write slave address: addr=0x%x\n", __func__, + ((msgs->addr)|0x01)); + + /* write slave address */ + writeb(((msgs->addr)|0x01), i2c_imx->base + IMX_I2C_I2DR); + result = i2c_imx_trx_complete(i2c_imx); + if (result) + return result; + result = i2c_imx_acked(i2c_imx); + if (result) + return result; + + dev_dbg(&i2c_imx->adapter.dev, "<%s> setup bus\n", __func__); + + /* setup bus to read data */ + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + temp &= ~I2CR_MTX; + if (msgs->len-1) + temp &= ~I2CR_TXAK; + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); + readb(i2c_imx->base + IMX_I2C_I2DR); /* dummy read */ + + dev_dbg(&i2c_imx->adapter.dev, "<%s> read data\n", __func__); + + /* read data */ + for (i = 0; i < msgs->len; i++) { + result = i2c_imx_trx_complete(i2c_imx); + if (result) + return result; + if (i == (msgs->len-1)) { + dev_dbg(&i2c_imx->adapter.dev, + "<%s> clear MSTA\n", __func__); + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + temp &= ~I2CR_MSTA; + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); + } else if (i == (msgs->len-2)) { + dev_dbg(&i2c_imx->adapter.dev, + "<%s> set TXAK\n", __func__); + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + temp |= I2CR_TXAK; + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); + } + msgs->buf[i] = readb(i2c_imx->base + IMX_I2C_I2DR); + dev_dbg(&i2c_imx->adapter.dev, + "<%s> read byte: B%d=0x%X\n", __func__, + i, msgs->buf[i]); + } + return 0; +} + +static int i2c_imx_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs, int num) +{ + unsigned int i, temp; + int result; + struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(adapter); + + dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); + + /* Check or i2c bus is not busy */ + result = i2c_imx_bus_busy(i2c_imx); + if (result) + goto fail0; + + /* Start I2C transfer */ + i2c_imx_start(i2c_imx); + + /* read/write data */ + for (i = 0; i < num; i++) { + if (i) { + dev_dbg(&i2c_imx->adapter.dev, + "<%s> repeated start\n", __func__); + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + temp |= I2CR_RSTA; + writeb(temp, i2c_imx->base + IMX_I2C_I2CR); + } + dev_dbg(&i2c_imx->adapter.dev, + "<%s> transfer message: %d\n", __func__, i); + /* write/read data */ +#ifdef CONFIG_I2C_DEBUG_BUS + temp = readb(i2c_imx->base + IMX_I2C_I2CR); + dev_dbg(&i2c_imx->adapter.dev, "<%s> CONTROL: IEN=%d, IIEN=%d, " + "MSTA=%d, MTX=%d, TXAK=%d, RSTA=%d\n", __func__, + (temp&I2CR_IEN ? 1 : 0), (temp&I2CR_IIEN ? 1 : 0), + (temp&I2CR_MSTA ? 1 : 0), (temp&I2CR_MTX ? 1 : 0), + (temp&I2CR_TXAK ? 1 : 0), (temp&I2CR_RSTA ? 1 : 0)); + temp = readb(i2c_imx->base + IMX_I2C_I2SR); + dev_dbg(&i2c_imx->adapter.dev, + "<%s> STATUS: ICF=%d, IAAS=%d, IBB=%d, " + "IAL=%d, SRW=%d, IIF=%d, RXAK=%d\n", __func__, + (temp&I2SR_ICF ? 1 : 0), (temp&I2SR_IAAS ? 1 : 0), + (temp&I2SR_IBB ? 1 : 0), (temp&I2SR_IAL ? 1 : 0), + (temp&I2SR_SRW ? 1 : 0), (temp&I2SR_IIF ? 1 : 0), + (temp&I2SR_RXAK ? 1 : 0)); +#endif + if (msgs[i].flags & I2C_M_RD) + result = i2c_imx_read(i2c_imx, &msgs[i]); + else + result = i2c_imx_write(i2c_imx, &msgs[i]); + } + +fail0: + /* Stop I2C transfer */ + i2c_imx_stop(i2c_imx); + + dev_dbg(&i2c_imx->adapter.dev, "<%s> exit with: %s: %d\n", __func__, + (result < 0) ? "error" : "success msg", (result < 0) ? result : num); + return (result < 0) ? result : num; +} + +static u32 i2c_imx_func(struct i2c_adapter *adapter) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static struct i2c_algorithm i2c_imx_algo = { + .master_xfer = i2c_imx_xfer, + .functionality = i2c_imx_func, +}; + +static int __init i2c_imx_probe(struct platform_device *pdev) +{ + struct imx_i2c_struct *i2c_imx; + struct resource *res; + void __iomem *base; + int irq; + int res_size; + int ret; + + dev_dbg(&pdev->dev, "<%s>\n", __func__); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + irq = platform_get_irq(pdev, 0); + if (!res) { + dev_err(&pdev->dev, "can't get device resources!\n"); + return -ENODEV; + } + if (irq < 0) { + dev_err(&pdev->dev, "can't get irq number!\n"); + return -ENODEV; + } + res_size = (res->end) - (res->start) + 1; + if (!request_mem_region(res->start, res_size, res->name)) { + dev_err(&pdev->dev, "can't allocate %d bytes at %d address!\n", + res_size, res->start); + return -ENOMEM; + } + base = ioremap(res->start, res_size); + if (!base) { + dev_err(&pdev->dev, "ioremap failed!\n"); + ret = -EIO; + goto fail0; + } + i2c_imx = kzalloc(sizeof(struct imx_i2c_struct), GFP_KERNEL); + if (!i2c_imx) { + dev_err(&pdev->dev, "can't allocate interface!\n"); + ret = -ENOMEM; + goto fail1; + } + + /* Setup i2c_imx driver structure */ + strcpy(i2c_imx->adapter.name, pdev->name); + i2c_imx->adapter.owner = THIS_MODULE; + i2c_imx->adapter.algo = &i2c_imx_algo; + i2c_imx->adapter.dev.parent = &pdev->dev; + i2c_imx->adapter.class = I2C_CLASS_HWMON; + i2c_imx->adapter.nr = pdev->id; + i2c_imx->irq = irq; + i2c_imx->base = base; + i2c_imx->res = res; + + init_waitqueue_head(&i2c_imx->queue); + + /* Set up platform driver data */ + platform_set_drvdata(pdev, i2c_imx); + + ret = request_irq(i2c_imx->irq, i2c_imx_isr, + IRQF_DISABLED, pdev->name, i2c_imx); + if (ret) { + dev_err(&pdev->dev, "cannot claim irq %d !\n", i2c_imx->irq); + goto fail2; + } + + /* Set up adapter data */ + i2c_set_adapdata(&i2c_imx->adapter, i2c_imx); + + /* Set up clock divider */ + i2c_imx_set_clk(i2c_imx, clkfreq); + + /* Set up I/O pins for I2C*/ + imx_gpio_mode(PA15_PF_I2C_SDA); + imx_gpio_mode(PA16_PF_I2C_SCL); + + /* Set up chip registers to defaults */ + writeb(0, i2c_imx->base + IMX_I2C_I2CR); + writeb(0, i2c_imx->base + IMX_I2C_I2SR); + + + /* Add I2C adapter */ + ret = i2c_add_numbered_adapter(&i2c_imx->adapter); + if (ret < 0) { + dev_err(&pdev->dev, "registration failed\n"); + goto fail3; + } + + dev_dbg(&i2c_imx->adapter.dev, "claimed irq %d\n", i2c_imx->irq); + dev_dbg(&i2c_imx->adapter.dev, "device resources from 0x%x to 0x%x\n", + i2c_imx->res->start, i2c_imx->res->end); + dev_dbg(&i2c_imx->adapter.dev, "allocated %d bytes at 0x%x \n", + res_size, i2c_imx->res->start); + dev_dbg(&i2c_imx->adapter.dev, "adapter name: \"%s\"\n", + i2c_imx->adapter.name); + dev_dbg(&i2c_imx->adapter.dev, "IMX I2C adapter registered\n"); + + return 0; /* Return OK */ + +fail3: + free_irq(i2c_imx->irq, i2c_imx); +fail2: + platform_set_drvdata(pdev, NULL); + kfree(i2c_imx); +fail1: + iounmap(i2c_imx->base); +fail0: + release_mem_region(res->start, res_size); + return ret; /* Return error number */ +} + +static int __devexit i2c_imx_remove(struct platform_device *pdev) +{ + struct imx_i2c_struct *i2c_imx = platform_get_drvdata(pdev); + + /* remove adapter */ + dev_dbg(&i2c_imx->adapter.dev, "adapter removed\n"); + i2c_del_adapter(&i2c_imx->adapter); + platform_set_drvdata(pdev, NULL); + + /* free interrupt */ + free_irq(i2c_imx->irq, i2c_imx); + + /* setup chip registers to defaults */ + writeb(0, i2c_imx->base + IMX_I2C_IADR); + writeb(0, i2c_imx->base + IMX_I2C_IFDR); + writeb(0, i2c_imx->base + IMX_I2C_I2CR); + writeb(0, i2c_imx->base + IMX_I2C_I2SR); + + /* release memory */ + release_mem_region(i2c_imx->res->start, + (i2c_imx->res->end - i2c_imx->res->start) + 1); + iounmap(i2c_imx->base); + kfree(i2c_imx); + return 0; +} + +static struct platform_driver i2c_imx_driver = { + .probe = i2c_imx_probe, + .remove = __devexit_p(i2c_imx_remove), + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + } +}; + +static int __init i2c_adap_imx_init(void) +{ + return platform_driver_register(&i2c_imx_driver); +} + +static void __exit i2c_adap_imx_exit(void) +{ + platform_driver_unregister(&i2c_imx_driver); + return; +} + +module_init(i2c_adap_imx_init); +module_exit(i2c_adap_imx_exit); + +module_param(clkfreq, uint, S_IRUGO); +MODULE_PARM_DESC(clkfreq, "desired IMX I2C Clock Rate in Hz"); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Darius Augulis"); +MODULE_DESCRIPTION("I2C adapter driver for IMX I2C bus"); +MODULE_ALIAS("platform:" DRIVER_NAME); Index: linux-2.6.26-rc9/drivers/i2c/busses/Kconfig =================================================================== --- linux-2.6.26-rc9.orig/drivers/i2c/busses/Kconfig +++ linux-2.6.26-rc9/drivers/i2c/busses/Kconfig @@ -257,6 +257,16 @@ config I2C_IBM_IIC This driver can also be built as a module. If so, the module will be called i2c-ibm_iic. +config I2C_IMX + tristate "IMX I2C interface" + depends on ARCH_IMX + help + Say Y here if you want to use the IIC bus controller on + the Freescale i.MXL and i.MX1 processors. + + This driver can also be built as a module. If so, the module + will be called i2c-imx. + config I2C_IOP3XX tristate "Intel IOPx3xx and IXP4xx on-chip I2C interface" depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_IXP4XX || ARCH_IOP13XX Index: linux-2.6.26-rc9/drivers/i2c/busses/Makefile =================================================================== --- linux-2.6.26-rc9.orig/drivers/i2c/busses/Makefile +++ linux-2.6.26-rc9/drivers/i2c/busses/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_I2C_HYDRA) += i2c-hydra.o obj-$(CONFIG_I2C_I801) += i2c-i801.o obj-$(CONFIG_I2C_I810) += i2c-i810.o obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o +obj-$(CONFIG_I2C_IMX) += i2c-imx.o obj-$(CONFIG_I2C_IOP3XX) += i2c-iop3xx.o obj-$(CONFIG_I2C_IXP2000) += i2c-ixp2000.o obj-$(CONFIG_I2C_POWERMAC) += i2c-powermac.o
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