On Thu, Jun 18, 2009 at 02:13:20PM +0300, Baruch Siach wrote: > The i2c Linux driver for the DesignWare i2c block of Synopsys, which is meant > for AMBA Peripheral Bus. This i2c block is used on SoC chips like the ARM9 > based PVG610. > > Signed-off-by: Baruch Siach <baruch@xxxxxxxxxx> > --- > Changes in v2: > - Address the comments of Linus Walleij > * User resource_size() > * Add __devinit and __devexit > - Add a comment to explain the use of static variables in loops > > drivers/i2c/busses/Kconfig | 9 + > drivers/i2c/busses/Makefile | 1 + > drivers/i2c/busses/i2c-designware.c | 595 +++++++++++++++++++++++++++++++++++ > 3 files changed, 605 insertions(+), 0 deletions(-) > create mode 100644 drivers/i2c/busses/i2c-designware.c > > diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig > index f1c6ca7..cef1567 100644 > --- a/drivers/i2c/busses/Kconfig > +++ b/drivers/i2c/busses/Kconfig > @@ -326,6 +326,15 @@ config I2C_DAVINCI > devices such as DaVinci NIC. > For details please see http://www.ti.com/davinci > > +config I2C_DESIGNWARE > + tristate "Synopsys DesignWare" > + help > + If you say yes to this option, support will be included for the > + Synopsys DesignWare I2C adapter. Only master mode is supported. > + > + This driver can also be built as a module. If so, the module > + will be called i2c-designware. > + > config I2C_GPIO > tristate "GPIO-based bitbanging I2C" > depends on GENERIC_GPIO > diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile > index 776acb6..c2be11e 100644 > --- a/drivers/i2c/busses/Makefile > +++ b/drivers/i2c/busses/Makefile > @@ -30,6 +30,7 @@ obj-$(CONFIG_I2C_AU1550) += i2c-au1550.o > obj-$(CONFIG_I2C_BLACKFIN_TWI) += i2c-bfin-twi.o > obj-$(CONFIG_I2C_CPM) += i2c-cpm.o > obj-$(CONFIG_I2C_DAVINCI) += i2c-davinci.o > +obj-$(CONFIG_I2C_DESIGNWARE) += i2c-designware.o > obj-$(CONFIG_I2C_GPIO) += i2c-gpio.o > obj-$(CONFIG_I2C_HIGHLANDER) += i2c-highlander.o > obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o > diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c > new file mode 100644 > index 0000000..fd1fea1 > --- /dev/null > +++ b/drivers/i2c/busses/i2c-designware.c > @@ -0,0 +1,595 @@ > +/* > + * Synopsys Designware I2C adapter driver (master only). > + * > + * Based on the TI DAVINCI I2C adapter driver. > + * > + * Copyright (C) 2006 Texas Instruments. > + * Copyright (C) 2007 MontaVista Software Inc. > + * Copyright (C) 2009 Provigent Ltd. > + * > + * ---------------------------------------------------------------------------- > + * > + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. > + * ---------------------------------------------------------------------------- > + * > + */ > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/delay.h> > +#include <linux/i2c.h> > +#include <linux/clk.h> > +#include <linux/errno.h> > +#include <linux/sched.h> > +#include <linux/err.h> > +#include <linux/interrupt.h> > +#include <linux/platform_device.h> > +#include <linux/io.h> > + > +/* > + * Registers offset > + */ > +#define DW_IC_CON 0x0 > +#define DW_IC_TAR 0x4 > +#define DW_IC_DATA_CMD 0x10 > +#define DW_IC_SS_SCL_HCNT 0x14 > +#define DW_IC_SS_SCL_LCNT 0x18 > +#define DW_IC_FS_SCL_HCNT 0x1c > +#define DW_IC_FS_SCL_LCNT 0x20 > +#define DW_IC_INTR_STAT 0x2c > +#define DW_IC_INTR_MASK 0x30 > +#define DW_IC_CLR_INTR 0x40 > +#define DW_IC_ENABLE 0x6c > +#define DW_IC_STATUS 0x70 > +#define DW_IC_TXFLR 0x74 > +#define DW_IC_RXFLR 0x78 > +#define DW_IC_COMP_PARAM_1 0xf4 > +#define DW_IC_TX_ABRT_SOURCE 0x80 > + > +#define DW_IC_CON_MASTER 0x1 > +#define DW_IC_CON_SPEED_STD 0x2 > +#define DW_IC_CON_SPEED_FAST 0x4 > +#define DW_IC_CON_10BITADDR_MASTER 0x10 > +#define DW_IC_CON_RESTART_EN 0x20 > +#define DW_IC_CON_SLAVE_DISABLE 0x40 > + > +#define DW_IC_INTR_TX_EMPTY 0x10 > +#define DW_IC_INTR_TX_ABRT 0x40 > +#define DW_IC_INTR_STOP_DET 0x200 > + > +#define DW_IC_STATUS_ACTIVITY 0x1 > + > +#define DW_IC_ERR_TX_ABRT 0x1 > + > +/* > + * status codes > + */ > +#define STATUS_IDLE 0x0 > +#define STATUS_WRITE_IN_PROGRESS 0x1 > +#define STATUS_READ_IN_PROGRESS 0x2 > + > +#define TIMEOUT 20 /* ms */ > + > +/* > + * hardware abort codes from the DW_IC_TX_ABRT_SOURCE register > + * > + * only expected abort codes are listed here > + * refer to the datasheet for the full list > + */ > +#define ABRT_7B_ADDR_NOACK 0 > +#define ABRT_10ADDR1_NOACK 1 > +#define ABRT_10ADDR2_NOACK 2 > +#define ABRT_TXDATA_NOACK 3 > +#define ABRT_GCALL_NOACK 4 > +#define ABRT_GCALL_READ 5 > +#define ABRT_SBYTE_ACKDET 7 > +#define ABRT_SBYTE_NORSTRT 9 > +#define ABRT_10B_RD_NORSTRT 10 > +#define ARB_MASTER_DIS 11 > +#define ARB_LOST 12 > + > +static char *abort_sources[] = { > + [ABRT_7B_ADDR_NOACK] = > + "slave address not acknowledged (7bit mode)", > + [ABRT_10ADDR1_NOACK] = > + "first address byte not acknowledged (10bit mode)", > + [ABRT_10ADDR2_NOACK] = > + "second address byte not acknowledged (10bit mode)", > + [ABRT_TXDATA_NOACK] = > + "data not acknowledged", > + [ABRT_GCALL_NOACK] = > + "no acknowledgement for a general call", > + [ABRT_GCALL_READ] = > + "read after general call", > + [ABRT_SBYTE_ACKDET] = > + "start byte acknowledged", > + [ABRT_SBYTE_NORSTRT] = > + "trying to send start byte when restart is disabled", > + [ABRT_10B_RD_NORSTRT] = > + "trying to read when restart is disabled (10bit mode)", > + [ARB_MASTER_DIS] = > + "trying to use disabled adapter", > + [ARB_LOST] = > + "lost arbitration", > +}; > + > +struct dw_i2c_dev { > + struct device *dev; > + void __iomem *base; > + struct completion cmd_complete; > + struct tasklet_struct pump_msg; > + struct mutex lock; > + struct clk *clk; > + int cmd_err; > + struct i2c_msg *msgs; > + int msgs_num; > + int msg_write_idx; > + int msg_read_idx; > + int msg_err; > + unsigned int status; > + u16 abort_source; > + int irq; > + struct i2c_adapter adapter; > + unsigned int tx_fifo_depth; > + unsigned int rx_fifo_depth; > +}; could you kerneldoc this to say what each member is doing? > +/* > + * This functions configures I2C and enables I2C. > + * This function is called during I2C init function. > + */ it would be nice to see kerneldoc here too. > +static int i2c_dw_init(struct dw_i2c_dev *dev) > +{ > + u32 input_clock_khz = clk_get_rate(dev->clk) / 1000; > + u16 ic_con; > + > + /* Disable the adapter */ > + writeb(0, dev->base + DW_IC_ENABLE); > + > + /* set standard and fast speed deviders for high/low periods */ > + writew((input_clock_khz * 40 / 10000)+1, /* std speed high, 4us */ > + dev->base + DW_IC_SS_SCL_HCNT); > + writew((input_clock_khz * 47 / 10000)+1, /* std speed low, 4.7us */ > + dev->base + DW_IC_SS_SCL_LCNT); > + writew((input_clock_khz * 6 / 10000)+1, /* fast speed high, 0.6us */ > + dev->base + DW_IC_FS_SCL_HCNT); > + writew((input_clock_khz * 13 / 10000)+1, /* fast speed low, 1.3us */ > + dev->base + DW_IC_FS_SCL_LCNT); > + > + /* configure the i2c master */ > + ic_con = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | > + DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_FAST; > + writew(ic_con, dev->base + DW_IC_CON); > + > + return 0; > +} > + > +/* > + * Waiting for bus not busy > + */ > +static int i2c_dw_wait_bus_not_busy(struct dw_i2c_dev *dev) > +{ > + int timeout = TIMEOUT; > + > + while (readb(dev->base + DW_IC_STATUS) & DW_IC_STATUS_ACTIVITY) { > + if (timeout <= 0) { > + dev_warn(dev->dev, "timeout waiting for bus ready\n"); > + return -ETIMEDOUT; > + } > + timeout--; > + mdelay(1); > + } > + > + return 0; > +} > + > +/* > + * Initiate low level master read/write transaction. > + * This function is called from i2c_dw_xfer when starting a transfer. > + * This function is also called from dw_i2c_pump_msg to continue a transfer > + * that is longer than the size of the TX FIFO. > + */ > +static void > +i2c_dw_xfer_msg(struct i2c_adapter *adap) > +{ > + struct dw_i2c_dev *dev = i2c_get_adapdata(adap); > + struct i2c_msg *msgs = dev->msgs; > + int num = dev->msgs_num; > + u16 ic_con, intr_mask; > + int tx_valid_bytes = readb(dev->base + DW_IC_TXFLR); > + int tx_limit = dev->tx_fifo_depth - tx_valid_bytes; > + int rx_limit = dev->rx_fifo_depth - readb(dev->base + DW_IC_RXFLR) > + - tx_valid_bytes; this still looks wrong, wuth tx_valid_bytes being used in something calculatign rx_limit? It is also rather long! > + static u16 buf_len; > + static u16 addr; > + > + if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) { > + /* Disable the adapter */ > + writeb(0, dev->base + DW_IC_ENABLE); > + > + /* set the slave (target) address */ > + writew(msgs[dev->msg_write_idx].addr, dev->base + DW_IC_TAR); > + > + /* if the slave address is ten bit address, enable 10BITADDR */ > + ic_con = readw(dev->base + DW_IC_CON); > + if (msgs[dev->msg_write_idx].flags & I2C_M_TEN) > + ic_con |= DW_IC_CON_10BITADDR_MASTER; > + else > + ic_con &= ~DW_IC_CON_10BITADDR_MASTER; > + writew(ic_con, dev->base + DW_IC_CON); > + > + /* Enable the adapter */ > + writeb(1, dev->base + DW_IC_ENABLE); > + > + addr = msgs[dev->msg_write_idx].addr; > + } > + > + for (; dev->msg_write_idx < num; dev->msg_write_idx++) { > + /* This static pointer remembers the the buffer from a previous > + * xfer_msg call when the transfer is to be continued (called > + * from dw_i2c_pump_msg()) > + */ > + static u8 *buf; > + > + /* if target address has changed, we need to > + * reprogram the target address in the i2c > + * adapter when we are done with this transfer > + */ > + if (msgs[dev->msg_write_idx].addr != addr) > + return; > + > + if (msgs[dev->msg_write_idx].len == 0) { > + dev_err(dev->dev, > + "%s: invalid message length\n", __func__); > + dev->msg_err = -EINVAL; > + return; > + } > + > + if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) { > + /* new i2c_msg */ > + buf = msgs[dev->msg_write_idx].buf; > + buf_len = msgs[dev->msg_write_idx].len; > + } > + > + for (; buf_len > 0 && tx_limit > 0 && rx_limit > 0; buf_len--) > + if (msgs[dev->msg_write_idx].flags & I2C_M_RD) { > + writew(0x100, dev->base + DW_IC_DATA_CMD); > + rx_limit--; tx_limit--; > + } else { > + writew(*buf++, dev->base + DW_IC_DATA_CMD); > + tx_limit--; > + } > + } > + > + intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT; > + if (buf_len > 0) { /* more bytes to be written */ > + intr_mask |= DW_IC_INTR_TX_EMPTY; > + dev->status |= STATUS_WRITE_IN_PROGRESS; > + } else > + dev->status &= ~STATUS_WRITE_IN_PROGRESS; > + writew(intr_mask, dev->base + DW_IC_INTR_MASK); > +} > + > +static void > +i2c_dw_read(struct i2c_adapter *adap) > +{ > + struct dw_i2c_dev *dev = i2c_get_adapdata(adap); > + struct i2c_msg *msgs = dev->msgs; > + int num = dev->msgs_num; > + u16 addr = msgs[dev->msg_read_idx].addr; > + int rx_valid = readw(dev->base + DW_IC_RXFLR); > + > + for (; dev->msg_read_idx < num; dev->msg_read_idx++) { > + /* These static pointers remember the the buffer from a > + * previous read call when there are bytes that haven't reach > + * the RX buffer yet (called from dw_i2c_pump_msg()) > + */ > + static int len; > + static u8 *buf; statics here, why static? it doesn't seem necessary to me and will only make problems later if you have >1 controller. > + if (!(msgs[dev->msg_read_idx].flags & I2C_M_RD)) > + continue; > + > + /* different i2c client, reprogram the i2c adapter */ > + if (msgs[dev->msg_read_idx].addr != addr) > + return; > + > + if (!(dev->status & STATUS_READ_IN_PROGRESS)) { > + len = msgs[dev->msg_read_idx].len; > + buf = msgs[dev->msg_read_idx].buf; > + } > + > + for (; len > 0 && rx_valid > 0; len--, rx_valid--) > + *buf++ = readb(dev->base + DW_IC_DATA_CMD); > + > + if (len > 0) { > + dev->status |= STATUS_READ_IN_PROGRESS; > + return; > + } else > + dev->status &= ~STATUS_READ_IN_PROGRESS; > + } > +} > + > +/* > + * Prepare controller for a transaction and call i2c_dw_xfer_msg > + */ > +static int > +i2c_dw_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num) > +{ > + struct dw_i2c_dev *dev = i2c_get_adapdata(adap); > + int ret; > + > + dev_dbg(dev->dev, "%s: msgs: %d\n", __func__, num); > + > + mutex_lock(&dev->lock); > + > + INIT_COMPLETION(dev->cmd_complete); > + dev->msgs = msgs; > + dev->msgs_num = num; > + dev->cmd_err = 0; > + dev->msg_write_idx = 0; > + dev->msg_read_idx = 0; > + dev->msg_err = 0; > + dev->status = STATUS_IDLE; > + > + ret = i2c_dw_wait_bus_not_busy(dev); > + if (ret < 0) > + goto done; > + > + /* start the transfers */ > + i2c_dw_xfer_msg(adap); > + > + /* wait for tx to complete */ > + ret = wait_for_completion_interruptible_timeout(&dev->cmd_complete, HZ); > + if (ret == 0) { > + dev_err(dev->dev, "controller timed out\n"); > + i2c_dw_init(dev); > + ret = -ETIMEDOUT; > + goto done; > + } else if (ret < 0) > + goto done; > + > + if (dev->msg_err) { > + ret = dev->msg_err; > + goto done; > + } > + > + /* no error */ > + if (likely(!dev->cmd_err)) { > + /* read rx fifo, and disable the adapter */ > + do { > + i2c_dw_read(adap); > + } while (dev->status & STATUS_READ_IN_PROGRESS); > + writeb(0, dev->base + DW_IC_ENABLE); > + ret = num; > + goto done; > + } > + > + /* We have an error */ > + if (dev->cmd_err == DW_IC_ERR_TX_ABRT) { > + unsigned long abort_source = dev->abort_source; > + int i; > + > + for_each_bit(i, &abort_source, ARRAY_SIZE(abort_sources)) { > + dev_err(dev->dev, "%s: %s\n", __func__, abort_sources[i]); > + } > + } > + ret = -EIO; > + > +done: > + mutex_unlock(&dev->lock); > + > + return ret; > +} > + > +static u32 i2c_dw_func(struct i2c_adapter *adap) > +{ > + return I2C_FUNC_I2C | I2C_FUNC_10BIT_ADDR; > +} > + > +static void dw_i2c_pump_msg(unsigned long data) > +{ > + struct dw_i2c_dev *dev = (struct dw_i2c_dev *) data; > + u16 intr_mask; > + > + i2c_dw_read(&dev->adapter); > + i2c_dw_xfer_msg(&dev->adapter); > + > + intr_mask = DW_IC_INTR_STOP_DET | DW_IC_INTR_TX_ABRT; > + if (dev->status & STATUS_WRITE_IN_PROGRESS) > + intr_mask |= DW_IC_INTR_TX_EMPTY; > + writew(intr_mask, dev->base + DW_IC_INTR_MASK); > +} > + > +/* > + * Interrupt service routine. This gets called whenever an I2C interrupt > + * occurs. > + */ > +static irqreturn_t i2c_dw_isr(int this_irq, void *dev_id) > +{ > + struct dw_i2c_dev *dev = dev_id; > + u16 stat; > + > + stat = readw(dev->base + DW_IC_INTR_STAT); > + dev_dbg(dev->dev, "%s: stat=0x%x\n", __func__, stat); > + if (stat & DW_IC_INTR_TX_ABRT) { > + dev->abort_source = readw(dev->base + DW_IC_TX_ABRT_SOURCE); > + dev->cmd_err |= DW_IC_ERR_TX_ABRT; > + dev->status = STATUS_IDLE; > + } else if (stat & DW_IC_INTR_TX_EMPTY) > + tasklet_schedule(&dev->pump_msg); > + > + readb(dev->base + DW_IC_CLR_INTR); /* clear interrupts */ > + writew(0, dev->base + DW_IC_INTR_MASK); /* disable interrupts */ > + if (stat & (DW_IC_INTR_TX_ABRT | DW_IC_INTR_STOP_DET)) > + complete(&dev->cmd_complete); > + > + return IRQ_HANDLED; > +} > + > +static struct i2c_algorithm i2c_dw_algo = { > + .master_xfer = i2c_dw_xfer, > + .functionality = i2c_dw_func, > +}; > + > +static int __devinit dw_i2c_probe(struct platform_device *pdev) > +{ > + struct dw_i2c_dev *dev; > + struct i2c_adapter *adap; > + struct resource *mem, *irq, *ioarea; > + int r; > + > + /* NOTE: driver uses the static register mapping */ > + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + if (!mem) { > + dev_err(&pdev->dev, "no mem resource?\n"); > + return -ENODEV; > + } -ENODEV is not a good error here. The best I can come up with is to use -EINVAL as some people resent returning fs errors like -ENOENT back here. > + irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); > + if (!irq) { > + dev_err(&pdev->dev, "no irq resource?\n"); > + return -ENODEV; > + } see above. > + ioarea = request_mem_region(mem->start, resource_size(mem), pdev->name); please avoid wrapping 80 characters. > + if (!ioarea) { > + dev_err(&pdev->dev, "I2C region already claimed\n"); > + return -EBUSY; > + } > + > + dev = kzalloc(sizeof(struct dw_i2c_dev), GFP_KERNEL); > + if (!dev) { > + r = -ENOMEM; > + goto err_release_region; > + } > + > + init_completion(&dev->cmd_complete); > + tasklet_init(&dev->pump_msg, dw_i2c_pump_msg, (unsigned long) dev); > + mutex_init(&dev->lock); > + dev->dev = get_device(&pdev->dev); > + dev->irq = irq->start; > + platform_set_drvdata(pdev, dev); > + > + dev->clk = clk_get(&pdev->dev, "I2CCLK"); clocks should not be named. this points to a problem with your arch's clock imp. if there's only one clock, clk_get(&pdev->dev, NULL) should be good enough. > + if (IS_ERR(dev->clk)) { > + r = -ENODEV; > + goto err_free_mem; > + } > + clk_enable(dev->clk); > + > + dev->base = ioremap(mem->start, resource_size(mem)); > + if (dev->base == NULL) { > + dev_err(&pdev->dev, "failure mapping io resources\n"); > + r = -EBUSY; > + goto err_unuse_clocks; > + } > + dev->tx_fifo_depth = > + ((readl(dev->base + DW_IC_COMP_PARAM_1) & 0x00ff0000) >> 16) > + + 1; > + dev->rx_fifo_depth = > + ((readl(dev->base + DW_IC_COMP_PARAM_1) & 0x0000ff00) >> 8) + 1; > + i2c_dw_init(dev); this could have been done as: { u32 fifo = readl(dev->base + DW_IC_COMP_PARAM_1); dev->tx_fifo_depth = (fifo >> 16) & 0xff; dev->rx_fifo_depth = ((fifo >> 8) & 0xff) + 1; } no wrapping, only one read of DW_IC_COMP_PARAM_1, win all round. > + writew(0, dev->base + DW_IC_INTR_MASK); /* disable IRQ */ > + r = request_irq(dev->irq, i2c_dw_isr, 0, pdev->name, dev); > + if (r) { > + dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq); > + goto err_iounmap; > + } > + > + adap = &dev->adapter; > + i2c_set_adapdata(adap, dev); > + adap->owner = THIS_MODULE; > + adap->class = I2C_CLASS_HWMON; > + strlcpy(adap->name, "Synopsys DesignWare I2C adapter", > + sizeof(adap->name)); > + adap->algo = &i2c_dw_algo; > + adap->dev.parent = &pdev->dev; > + > + adap->nr = pdev->id; > + r = i2c_add_numbered_adapter(adap); > + if (r) { > + dev_err(&pdev->dev, "failure adding adapter\n"); > + goto err_free_irq; > + } > + > + return 0; > + > +err_free_irq: > + free_irq(dev->irq, dev); > +err_iounmap: > + iounmap(dev->base); > +err_unuse_clocks: > + clk_disable(dev->clk); > + clk_put(dev->clk); > + dev->clk = NULL; > +err_free_mem: > + platform_set_drvdata(pdev, NULL); > + put_device(&pdev->dev); > + kfree(dev); > +err_release_region: > + release_mem_region(mem->start, resource_size(mem)); > + > + return r; > +} > + > +static int __devexit dw_i2c_remove(struct platform_device *pdev) > +{ > + struct dw_i2c_dev *dev = platform_get_drvdata(pdev); > + struct resource *mem; > + > + platform_set_drvdata(pdev, NULL); > + i2c_del_adapter(&dev->adapter); > + put_device(&pdev->dev); > + > + clk_disable(dev->clk); > + clk_put(dev->clk); > + dev->clk = NULL; > + > + writeb(0, dev->base + DW_IC_ENABLE); > + free_irq(dev->irq, dev); > + kfree(dev); > + > + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + release_mem_region(mem->start, resource_size(mem)); > + return 0; > +} > + > +/* work with hotplug and coldplug */ > +MODULE_ALIAS("platform:i2c_designware"); > + > +static struct platform_driver dw_i2c_driver = { > + .remove = __devexit_p(dw_i2c_remove), > + .driver = { > + .name = "i2c_designware", > + .owner = THIS_MODULE, > + }, > +}; + > +static int __init dw_i2c_init_driver(void) > +{ > + return platform_driver_probe(&dw_i2c_driver, dw_i2c_probe); > +} > +module_init(dw_i2c_init_driver); > + > +static void __exit dw_i2c_exit_driver(void) > +{ > + platform_driver_unregister(&dw_i2c_driver); > +} > +module_exit(dw_i2c_exit_driver); > + > +MODULE_AUTHOR("Baruch Siach <baruch@xxxxxxxxxx>"); > +MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); > +MODULE_LICENSE("GPL"); > -- > 1.6.3.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-i2c" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Ben (ben@xxxxxxxxx, http://www.fluff.org/) 'a smiley only costs 4 bytes' -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
