On Fri, Aug 06, 2010 at 01:33:24PM +0900, Masayuki Ohtak wrote:
> I2C driver of Topcliff PCH
>
> Topcliff PCH is the platform controller hub that is going to be used in
> Intel's upcoming general embedded platform. All IO peripherals in
> Topcliff PCH are actually devices sitting on AMBA bus.
> Topcliff PCH has I2C I/F. Using this I/F, it is able to access system
> devices connected to I2C.
>
> Signed-off-by: Masayuki Ohtake <masa-k...@dsn.okisemi.com>
Why not run this by the i2c maintainer and developers as well?
You do know about the scripts/get_maintainer.pl program to tell you who
to copy when sending a patch, right? Please use that.
>
> ---
> drivers/i2c/busses/Kconfig | 8 +
> drivers/i2c/busses/Makefile | 3 +
> drivers/i2c/busses/i2c-pch.c | 910
> ++++++++++++++++++++++++++++++++++++++++++
> drivers/i2c/busses/i2c-pch.h | 147 +++++++
> drivers/i2c/i2c-dev.c | 21 +
> 5 files changed, 1089 insertions(+), 0 deletions(-)
> create mode 100644 drivers/i2c/busses/i2c-pch.c
> create mode 100644 drivers/i2c/busses/i2c-pch.h
>
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index 5f318ce..98e7201 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -7,6 +7,14 @@ menu "I2C Hardware Bus support"
> comment "PC SMBus host controller drivers"
> depends on PCI
>
> +config PCH_I2C
> + tristate "PCH I2C"
> + depends on PCI
> + help
> + This driver is for PCH I2C of Topcliff which is an IOH for x86
> + embedded processor.
> + This driver can access PCH I2C bus device.
> +
> config I2C_ALI1535
> tristate "ALI 1535"
> depends on PCI
> diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
> index 302c551..3e6b8d6 100644
> --- a/drivers/i2c/busses/Makefile
> +++ b/drivers/i2c/busses/Makefile
> @@ -75,3 +75,6 @@ obj-$(CONFIG_SCx200_I2C) += scx200_i2c.o
> ifeq ($(CONFIG_I2C_DEBUG_BUS),y)
> EXTRA_CFLAGS += -DDEBUG
> endif
> +
> +obj-$(CONFIG_PCH_I2C) += pch_i2c.o
> +pch_i2c-objs := i2c-pch.o
Why not just name your file i2c-pci.c and then you don't need this
two-step Makefile mess?
> diff --git a/drivers/i2c/busses/i2c-pch.c b/drivers/i2c/busses/i2c-pch.c
> new file mode 100644
> index 0000000..7939781
> --- /dev/null
> +++ b/drivers/i2c/busses/i2c-pch.c
> @@ -0,0 +1,910 @@
> +/*
> + * Copyright (C) 2010 OKI SEMICONDUCTOR Co., 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; version 2 of the License.
> + *
> + * 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.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/delay.h>
> +#include <linux/init.h>
> +#include <linux/errno.h>
> +#include <linux/i2c.h>
> +#include <linux/fs.h>
> +#include <linux/io.h>
> +#include <linux/types.h>
> +#include <linux/interrupt.h>
> +#include <linux/jiffies.h>
> +#include <linux/pci.h>
> +#include <linux/mutex.h>
> +#include <linux/ktime.h>
> +
> +#include "i2c-pch.h"
Why do you need a .h file for this driver?
<snip>
> diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
> index f4110aa..53e13de 100644
> --- a/drivers/i2c/i2c-dev.c
> +++ b/drivers/i2c/i2c-dev.c
> @@ -36,6 +36,7 @@
> #include <linux/i2c-dev.h>
> #include <linux/jiffies.h>
> #include <linux/uaccess.h>
> +#include "busses/i2c-pch.h"
Note how no other i2c driver needs to be included here...
> static struct i2c_driver i2cdev_driver;
>
> @@ -372,6 +373,12 @@ static long i2cdev_ioctl(struct file *file, unsigned int
> cmd, unsigned long arg)
> struct i2c_client *client = file->private_data;
> unsigned long funcs;
>
> + unsigned long pch_mode;
> + int ret;
> +
> + struct i2c_msg msg;
> + unsigned char msgbuf[1];
> +
> dev_dbg(&client->adapter->dev, "ioctl, cmd=0x%02x, arg=0x%02lx\n",
> cmd, arg);
>
> @@ -427,6 +434,20 @@ static long i2cdev_ioctl(struct file *file, unsigned int
> cmd, unsigned long arg)
> */
> client->adapter->timeout = msecs_to_jiffies(arg * 10);
> break;
> + case I2C_MODE_SEL:
> + pch_mode = arg;
> +
> + if (pch_mode <= 4) {
> + msgbuf[0] = pch_mode;
> + msg.buf = msgbuf;
> + msg.len = 1;
> + msg.flags = 0;
> + ret = i2c_transfer(client->adapter, &msg, 1);
> + } else {
> + printk(KERN_ERR "I2C mode sel:Invalid mode\n");
> + ret = -EINVAL;
> + }
> + return ret;
I really doubt you are allowed to add a new ioctl to the core i2c layer.
You will have to run this by the i2c maintainer to get it accepted.
good luck,
greg k-h
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