On Thu, Jan 07, 2010 at 11:54:20AM -0800, David Daney wrote:
> From: Rade Bozic <rade.bozic.ext@xxxxxxx>
>
> Signed-off-by: Rade Bozic <rade.bozic.ext@xxxxxxx>
> Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
> ---
> drivers/i2c/busses/Kconfig | 10 +
> drivers/i2c/busses/Makefile | 1 +
> drivers/i2c/busses/i2c-octeon.c | 579 +++++++++++++++++++++++++++++++++++++++
> 3 files changed, 590 insertions(+), 0 deletions(-)
> create mode 100644 drivers/i2c/busses/i2c-octeon.c
>
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index 5f318ce..737f052 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -564,6 +564,16 @@ config I2C_VERSATILE
> This driver can also be built as a module. If so, the module
> will be called i2c-versatile.
>
> +config I2C_OCTEON
> + tristate "Cavium OCTEON I2C bus support"
> + depends on CPU_CAVIUM_OCTEON
> + help
> + Say yes if you want to support the I2C serial bus on Cavium
> + OCTEON SOC.
> +
> + This driver can also be built as a module. If so, the module
> + will be called i2c-octeon.
> +
> comment "External I2C/SMBus adapter drivers"
>
> config I2C_PARPORT
> diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
> index 302c551..c2c4ea1 100644
> --- a/drivers/i2c/busses/Makefile
> +++ b/drivers/i2c/busses/Makefile
> @@ -54,6 +54,7 @@ obj-$(CONFIG_I2C_SH_MOBILE) += i2c-sh_mobile.o
> obj-$(CONFIG_I2C_SIMTEC) += i2c-simtec.o
> obj-$(CONFIG_I2C_STU300) += i2c-stu300.o
> obj-$(CONFIG_I2C_VERSATILE) += i2c-versatile.o
> +obj-$(CONFIG_I2C_OCTEON) += i2c-octeon.o
>
> # External I2C/SMBus adapter drivers
> obj-$(CONFIG_I2C_PARPORT) += i2c-parport.o
> diff --git a/drivers/i2c/busses/i2c-octeon.c b/drivers/i2c/busses/i2c-octeon.c
> new file mode 100644
> index 0000000..57455ac
> --- /dev/null
> +++ b/drivers/i2c/busses/i2c-octeon.c
> @@ -0,0 +1,579 @@
> +/*
> + * (C) Copyright 2009-2010
> + * Nokia Siemens Networks, michael.lawnick.ext@xxxxxxx
> + *
> + * This is a driver for the i2c adapter in Cavium Networks' OCTEON processors.
> + *
> + * Release 0.1
> + *
> + * This file is licensed under the terms of the GNU General Public
> + * License version 2. This program is licensed "as is" without any
> + * warranty of any kind, whether express or implied.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/sched.h>
> +#include <linux/init.h>
> +
> +#include <linux/io.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/delay.h>
> +#include <linux/platform_device.h>
> +
> +#include <asm/octeon/octeon.h>
> +
> +#define DRV_NAME "i2c-octeon"
> +#define DRV_VERSION "0.1"
> +
> +/* register offsets */
> +#define SW_TWSI 0x00
> +#define TWSI_INT 0x10
> +
> +/* Controller command patterns */
> +#define SW_TWSI_V 0x8000000000000000ull
> +#define SW_TWSI_EOP_TWSI_DATA 0x0C00000100000000ull
> +#define SW_TWSI_EOP_TWSI_CTL 0x0C00000200000000ull
> +#define SW_TWSI_EOP_TWSI_CLKCTL 0x0C00000300000000ull
> +#define SW_TWSI_EOP_TWSI_STAT 0x0C00000300000000ull
> +#define SW_TWSI_EOP_TWSI_RST 0x0C00000700000000ull
> +#define SW_TWSI_OP_TWSI_CLK 0x0800000000000000ull
> +#define SW_TWSI_R 0x0100000000000000ull
> +
> +/* Controller command and status bits */
> +#define TWSI_CTL_CE 0x80
> +#define TWSI_CTL_ENAB 0x40
> +#define TWSI_CTL_STA 0x20
> +#define TWSI_CTL_STP 0x10
> +#define TWSI_CTL_IFLG 0x08
> +#define TWSI_CTL_AAK 0x04
> +
> +/* Some status values */
> +#define STAT_START 0x08
> +#define STAT_RSTART 0x10
> +#define STAT_TXADDR_ACK 0x18
> +#define STAT_TXDATA_ACK 0x28
> +#define STAT_RXADDR_ACK 0x40
> +#define STAT_RXDATA_ACK 0x50
> +#define STAT_IDLE 0xF8
> +
> +#ifndef NO_IRQ
> +#define NO_IRQ (-1)
> +#endif
this does not fill me with a warm joyous feeling...
> +struct octeon_i2c {
> + wait_queue_head_t queue;
> + struct i2c_adapter adap;
> + int irq;
> + int twsi_freq;
> + int sys_freq;
> + uint8_t twsi_ctl;
> + resource_size_t twsi_phys;
> + void __iomem *twsi_base;
> + resource_size_t regsize;
> + struct device *dev;
> +};
kerneldoc or any documentation at-all would be nice.
> +/* Writes need to be flushed by a read. */
> +static void octeon_i2c_write_sw(struct octeon_i2c *i2c,
> + uint64_t eop_reg,
> + uint8_t data)
> +{
> + uint64_t tmp;
> +
> + __raw_writeq(SW_TWSI_V | eop_reg | data, i2c->twsi_base + SW_TWSI);
> + tmp = __raw_readq(i2c->twsi_base + SW_TWSI);
> +}
> +
> +static uint8_t octeon_i2c_read_sw(struct octeon_i2c *i2c, uint64_t eop_reg)
> +{
> + uint64_t tmp;
> +
> + __raw_writeq(SW_TWSI_V | eop_reg | SW_TWSI_R, i2c->twsi_base + SW_TWSI);
> + tmp = __raw_readq(i2c->twsi_base + SW_TWSI);
> +
> + return __raw_readq(i2c->twsi_base + SW_TWSI) & 0xFF;
> +}
> +
> +static void octeon_i2c_write_int(struct octeon_i2c *i2c, uint64_t data)
> +{
> + uint64_t tmp;
> +
> + __raw_writeq(data, i2c->twsi_base + TWSI_INT);
> + tmp = __raw_readq(i2c->twsi_base + TWSI_INT);
> +}
> +
> +static void octeon_i2c_int_enable(struct octeon_i2c *i2c)
> +{
> + octeon_i2c_write_int(i2c, 0x40);
> +}
> +
> +static void octeon_i2c_int_disable(struct octeon_i2c *i2c)
> +{
> + octeon_i2c_write_int(i2c, 0);
> +}
> +
> +/* If there was a reset while a device was driving 0 to bus,
> + bus is blocked. We toggle it free manually by some clock
> + cycles and send a stop. */
> +static void octeon_i2c_unblock(struct octeon_i2c *i2c)
> +{
> + int i;
> +
> + dev_dbg(i2c->dev, "%s\n", __func__);
> + for (i = 0; i < 9; i++) {
> + octeon_i2c_write_int(i2c, 0x0);
> + udelay(5);
> + octeon_i2c_write_int(i2c, 0x200);
> + udelay(5);
> + }
> + octeon_i2c_write_int(i2c, 0x300);
> + udelay(5);
> + octeon_i2c_write_int(i2c, 0x100);
> + udelay(5);
> + octeon_i2c_write_int(i2c, 0x0);
> +}
> +
> +static irqreturn_t octeon_i2c_isr(int irq, void *dev_id)
> +{
> + struct octeon_i2c *i2c = dev_id;
> +
> + octeon_i2c_int_disable(i2c);
> + i2c->twsi_ctl = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_CTL);
> + wake_up_interruptible(&i2c->queue);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int octeon_i2c_wait(struct octeon_i2c *i2c)
> +{
> + unsigned long orig_jiffies = jiffies;
> + uint8_t ctl;
> + int result = 0;
> +
> + if (i2c->irq == NO_IRQ) {
> + /* polling */
> + do {
> + ctl = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_CTL);
> + if (ctl & TWSI_CTL_IFLG)
> + break;
> + } while (!time_after(jiffies,
> + orig_jiffies + i2c->adap.timeout));
> +
> + if (!(ctl & TWSI_CTL_IFLG)) {
> + dev_dbg(i2c->dev, "%s: timeout\n", __func__);
> + result = -ETIMEDOUT;
> + }
> + } else {
> + i2c->twsi_ctl = 0;
> + /* interrupt mode */
> + octeon_i2c_int_enable(i2c);
> +
> + result = wait_event_interruptible_timeout(i2c->queue,
> + (i2c->twsi_ctl & TWSI_CTL_IFLG),
> + i2c->adap.timeout);
> +
> + if (unlikely(result < 0)) {
> + dev_dbg(i2c->dev, "%s: wait interrupted\n", __func__);
> + } else if (unlikely(!(i2c->twsi_ctl & TWSI_CTL_IFLG))) {
> + dev_dbg(i2c->dev, "%s: timeout\n", __func__);
> + result = -ETIMEDOUT;
> + }
> + }
> +
> + return result < 0 ? result : 0;
> +}
> +
> +static int octeon_i2c_start(struct octeon_i2c *i2c)
> +{
> + uint8_t data;
> + int result;
> +
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL,
> + TWSI_CTL_ENAB | TWSI_CTL_STA);
> +
> + result = octeon_i2c_wait(i2c);
> + if (unlikely(result < 0) &&
> + octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_STAT) == STAT_IDLE) {
> + /*
> + * Controller refused to send start flag May be a
> + * client is holding SDA low - let's try to free it.
> + */
> + octeon_i2c_unblock(i2c);
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL,
> + TWSI_CTL_ENAB | TWSI_CTL_STA);
> +
> + result = octeon_i2c_wait(i2c);
> + if (result < 0)
> + return result;
> + }
> +
> + data = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_STAT);
> + if ((data != STAT_START) && (data != STAT_RSTART)) {
> + dev_dbg(i2c->dev, "%s: bad status (0x%x)\n", __func__, data);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int octeon_i2c_stop(struct octeon_i2c *i2c)
> +{
> + unsigned long orig_jiffies = jiffies;
> + uint8_t data;
> +
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL,
> + TWSI_CTL_ENAB | TWSI_CTL_STP);
> +
> + /*
> + * Controller will change to idle, but that does not raise an
> + * interrupt, so we have to poll.
> + */
> + do {
> + data = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_STAT);
> + if (data == STAT_IDLE)
> + break;
> + udelay(1);
> + } while (!time_after(jiffies, orig_jiffies + 2));
you sure you want to busy wait like this?
> + if (data != STAT_IDLE) {
> + dev_dbg(i2c->dev, "%s: bad status(0x%x)\n", __func__, data);
> + return -1;
> + }
> + return 0;
> +}
> +
> +static int octeon_i2c_write(struct octeon_i2c *i2c, int target,
> + const uint8_t *data, int length)
> +{
> + int i, result;
> + uint8_t tmp;
> +
> + result = octeon_i2c_start(i2c);
> + if (unlikely(result < 0))
> + return result;
> +
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_DATA, target << 1);
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL, TWSI_CTL_ENAB);
> +
> + result = octeon_i2c_wait(i2c);
> + if (unlikely(result < 0))
> + return result;
> +
> + for (i = 0; i < length; i++) {
> + tmp = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_STAT);
> + if ((tmp != STAT_TXADDR_ACK) && (tmp != STAT_TXDATA_ACK)) {
> + dev_dbg(i2c->dev,
> + "%s: bad status before write (0x%x)\n",
> + __func__, tmp);
> + return -(int)tmp;
> + }
> +
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_DATA, data[i]);
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL, TWSI_CTL_ENAB);
> +
> + result = octeon_i2c_wait(i2c);
> + if (unlikely(result < 0))
> + return result;
> + }
> +
> + return 0;
> +}
> +
> +static int octeon_i2c_read(struct octeon_i2c *i2c, int target,
> + uint8_t *data, int length)
> +{
> + int i, result;
> + uint8_t tmp;
> +
> + if (length < 1)
> + return -EINVAL;
> +
> + result = octeon_i2c_start(i2c);
> + if (result)
> + return result;
> +
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_DATA, (target<<1) | 1);
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL, TWSI_CTL_ENAB);
> +
> + result = octeon_i2c_wait(i2c);
> + if (unlikely(result < 0))
> + return result;
> +
> + for (i = 0; i < length; i++) {
> + tmp = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_STAT);
> + if ((tmp != STAT_RXDATA_ACK) && (tmp != STAT_RXADDR_ACK)) {
> + dev_dbg(i2c->dev,
> + "%s: bad status before read (0x%x)\n",
> + __func__, tmp);
> + return -(int)tmp;
> + }
> +
> + if (i+1 < length)
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL,
> + TWSI_CTL_ENAB | TWSI_CTL_AAK);
> + else
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL,
> + TWSI_CTL_ENAB);
> +
> + result = octeon_i2c_wait(i2c);
> + if (unlikely(result < 0))
> + return result;
> +
> + data[i] = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_DATA);
> + }
> + return length;
> +}
> +
> +static int octeon_i2c_xfer(struct i2c_adapter *adap,
> + struct i2c_msg *msgs,
> + int num)
> +{
> + struct i2c_msg *pmsg;
> + int i;
> + int ret = 0;
> + struct octeon_i2c *i2c = i2c_get_adapdata(adap);
> +
> + for (i = 0; ret >= 0 && i < num; i++) {
> + pmsg = &msgs[i];
> + dev_dbg(i2c->dev,
> + "%s: Doing %s %d byte(s) to/from 0x%02x - "
> + "%d of %d messages\n",
i'd rather not see text lines broken over like this, it is one
case where >80 character lines are allowed. You could always shorten
it by removing the "to/from" and having "%d/%d msgs" at the end
and possible removing the "Doing" as well.
> + __func__,
> + pmsg->flags & I2C_M_RD ? "read" : "write",
> + pmsg->len, pmsg->addr, i + 1, num);
> + if (pmsg->flags & I2C_M_RD)
> + ret = octeon_i2c_read(i2c, pmsg->addr, pmsg->buf,
> + pmsg->len);
> + else
> + ret = octeon_i2c_write(i2c, pmsg->addr, pmsg->buf,
> + pmsg->len);
> + }
> + octeon_i2c_stop(i2c);
> +
> + return (ret < 0) ? ret : num;
> +}
> +
> +static u32 octeon_i2c_functionality(struct i2c_adapter *adap)
> +{
> + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
> +}
> +
> +static const struct i2c_algorithm octeon_i2c_algo = {
> + .master_xfer = octeon_i2c_xfer,
> + .functionality = octeon_i2c_functionality,
> +};
> +
> +static struct i2c_adapter octeon_i2c_ops = {
> + .owner = THIS_MODULE,
> + .name = "OCTEON adapter",
> + .algo = &octeon_i2c_algo,
> + .timeout = 2,
> +};
> +
> +static int __init octeon_i2c_setclock(struct octeon_i2c *i2c)
> +{
> + int tclk, thp_base, inc, thp_idx, mdiv_idx, ndiv_idx, foscl, diff;
> + int thp = 0x18, mdiv = 2, ndiv = 0, delta_hz = 1000000;
> +
> + for (ndiv_idx = 0; ndiv_idx < 8 && delta_hz != 0; ndiv_idx++) {
> + /*
> + * An mdiv value of less than 2 seems to not work well
> + * with ds1337 RTCs, so we constrain it to larger
> + * values.
> + */
> + for (mdiv_idx = 15; mdiv_idx >= 2 && delta_hz != 0; mdiv_idx--) {
> + /*
> + * For given ndiv and mdiv values check the
> + * two closest thp values.
> + */
> + tclk = i2c->twsi_freq * (mdiv_idx + 1) * 10;
> + tclk *= (1 << ndiv_idx);
> + thp_base = (i2c->sys_freq / (tclk * 2)) - 1;
> + for (inc = 0; inc <= 1; inc++) {
> + thp_idx = thp_base + inc;
> + if (thp_idx < 5 || thp_idx > 0xff)
> + continue;
> +
> + foscl = i2c->sys_freq / (2 * (thp_idx + 1));
> + foscl = foscl / (1 << ndiv_idx);
> + foscl = foscl / (mdiv_idx + 1) / 10;
> + diff = abs(foscl - i2c->twsi_freq);
> + if (diff < delta_hz) {
> + delta_hz = diff;
> + thp = thp_idx;
> + mdiv = mdiv_idx;
> + ndiv = ndiv_idx;
> + }
> + }
> + }
> + }
> + octeon_i2c_write_sw(i2c, SW_TWSI_OP_TWSI_CLK, thp);
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CLKCTL, (mdiv << 3) | ndiv);
> +
> + return 0;
> +}
> +
> +static int __init octeon_i2c_initlowlevel(struct octeon_i2c *i2c)
> +{
> + uint8_t status;
> + int tries;
> +
> + /* disable high level controller, enable bus access */
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_CTL, TWSI_CTL_ENAB);
> +
> + /* reset controller */
> + octeon_i2c_write_sw(i2c, SW_TWSI_EOP_TWSI_RST, 0);
> +
> + for (tries = 10; tries; tries--) {
> + udelay(1);
> + status = octeon_i2c_read_sw(i2c, SW_TWSI_EOP_TWSI_STAT);
> + if (status == STAT_IDLE)
> + return 0;
> + }
> + dev_dbg(i2c->dev, "%s: TWSI_RST failed! (0x%x)\n", __func__, status);
> + return -1;
> +}
> +
> +static int __init octeon_i2c_probe(struct platform_device *pdev)
> +{
> + int irq, result = 0;
> + struct octeon_i2c *i2c;
> + struct octeon_i2c_data *i2c_data;
> + struct resource *res_mem;
> +
> + i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
> + if (!i2c) {
> + printk(KERN_ERR "%s i2c-cavium - kzalloc failed\n", __func__);
> + return -ENOMEM;
> + }
> + i2c->dev = &pdev->dev;
> + i2c_data = pdev->dev.platform_data;
> +
> + res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + irq = platform_get_irq(pdev, 0);
> +
> + if (res_mem == NULL) {
> + dev_dbg(i2c->dev, "%s: found no memory resource\n", __func__);
> + kfree(i2c);
> + return -ENODEV;
> + }
> +
> + if (i2c_data == NULL) {
> + dev_dbg(i2c->dev, "%s: no I2C frequence data\n", __func__);
> + kfree(i2c);
> + return -ENODEV;
> + }
returning -ENODEV isn't a good idea, the device layer won't print an
error on seeing -ENODEV as it thinks this is a probe for a device that
was never there.
> + i2c->twsi_phys = res_mem->start;
> + i2c->regsize = resource_size(res_mem);
> + i2c->twsi_freq = i2c_data->i2c_freq;
> + i2c->sys_freq = i2c_data->sys_freq;
> +
> + if (!request_mem_region(i2c->twsi_phys, i2c->regsize, res_mem->name)) {
> + dev_dbg(i2c->dev,
> + "%s i2c-cavium - request_mem_region failed\n",
> + __func__);
> + goto fail_region;
> + }
> + i2c->twsi_base = ioremap(i2c->twsi_phys, i2c->regsize);
> +
> + init_waitqueue_head(&i2c->queue);
> +
> + i2c->irq = irq;
> + if (i2c->irq != NO_IRQ) {
platform_get_irq() returns a negative error cdoe if no irq is found,
so you need to do (irq < 0) here otherwise it'll never trip. Should
also mean yo ucan get rid of NO_IRQ define above.
> + /* i2c->irq = NO_IRQ implies polling */
> + result = request_irq(i2c->irq, octeon_i2c_isr, 0, DRV_NAME, i2c);
> + if (result < 0) {
> + dev_dbg(i2c->dev,
> + "%s: - failed to attach interrupt\n",
> + __func__);
> + goto fail_irq;
> + }
> + }
> +
> + result = octeon_i2c_initlowlevel(i2c);
> + if (result) {
> + dev_dbg(i2c->dev, "%s: init low level failed\n", __func__);
> + goto fail_add;
> + }
> +
> + result = octeon_i2c_setclock(i2c);
> + if (result) {
> + dev_dbg(i2c->dev, "%s: clock init failed\n", __func__);
> + goto fail_add;
> + }
> +
> + i2c->adap = octeon_i2c_ops;
> + i2c->adap.dev.parent = &pdev->dev;
> + i2c->adap.nr = pdev->id >= 0 ? pdev->id : 0;
> + i2c_set_adapdata(&i2c->adap, i2c);
> + platform_set_drvdata(pdev, i2c);
> +
> + result = i2c_add_numbered_adapter(&i2c->adap);
> + if (result < 0) {
> + dev_dbg(i2c->dev, "%s: failed to add adapter\n", __func__);
> + goto fail_add;
> + }
> + return result;
> +
> +fail_add:
> + platform_set_drvdata(pdev, NULL);
> + if (i2c->irq != NO_IRQ)
> + free_irq(i2c->irq, i2c);
> +fail_irq:
> + iounmap(i2c->twsi_base);
> + release_mem_region(i2c->twsi_phys, i2c->regsize);
> +fail_region:
> + kfree(i2c);
> + return result;
> +};
> +
> +static int __exit octeon_i2c_remove(struct platform_device *pdev)
> +{
> + struct octeon_i2c *i2c = platform_get_drvdata(pdev);
> +
> + i2c_del_adapter(&i2c->adap);
> + platform_set_drvdata(pdev, NULL);
> + if (i2c->irq != NO_IRQ)
> + free_irq(i2c->irq, i2c);
see above comment on NO_IRQ
> + iounmap(i2c->twsi_base);
> + release_mem_region(i2c->twsi_phys, i2c->regsize);
> + kfree(i2c);
> + return 0;
> +};
> +
> +static struct platform_driver octeon_i2c_driver = {
> + .probe = octeon_i2c_probe,
> + .remove = __exit_p(octeon_i2c_remove),
__devexit_p() here, probably should change __exit to __devexit on the
remove function.
> + .driver = {
> + .owner = THIS_MODULE,
> + .name = DRV_NAME,
> + },
> +};
> +
> +static int __init octeon_i2c_init(void)
> +{
> + int rv;
> +
> + rv = platform_driver_register(&octeon_i2c_driver);
> + printk(KERN_INFO "driver %s is loaded\n", DRV_NAME);
> + return rv;
> +}
I'd rather not see 'driver loaded' messages if possible.
> +static void __exit octeon_i2c_exit(void)
> +{
> + platform_driver_unregister(&octeon_i2c_driver);
> + printk(KERN_INFO "driver %s unloaded\n", DRV_NAME);
> +}
I'd say this is even less useful that the one in the init code.
> +MODULE_AUTHOR("Michael Lawnick <michael.lawnick.ext@xxxxxxx>");
> +MODULE_DESCRIPTION("I2C-Bus adapter for Cavium OCTEON processors");
> +MODULE_LICENSE("GPL");
> +MODULE_VERSION(DRV_VERSION);
> +MODULE_ALIAS("platform:" DRV_NAME);
> +
> +module_init(octeon_i2c_init);
> +module_exit(octeon_i2c_exit);
--
Ben (ben@xxxxxxxxx, http://www.fluff.org/)
'a smiley only costs 4 bytes'
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