From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from tango.tkos.co.il ([62.219.50.35]) by bombadil.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1OMFLu-0001jt-4R for barebox@lists.infradead.org; Wed, 09 Jun 2010 07:05:31 +0000 From: Baruch Siach Date: Wed, 9 Jun 2010 10:05:04 +0300 Message-Id: In-Reply-To: References: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 5/8] i2c: add driver for the MC34704 PMIC To: barebox@lists.infradead.org Cc: Baruch Siach Signed-off-by: Baruch Siach --- drivers/i2c/Kconfig | 3 + drivers/i2c/Makefile | 1 + drivers/i2c/mc34704.c | 140 +++++++++++++++++++++++++++++++++++++++++++++++++ include/i2c/mc34704.h | 26 +++++++++ 4 files changed, 170 insertions(+), 0 deletions(-) create mode 100644 drivers/i2c/mc34704.c create mode 100644 include/i2c/mc34704.h diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index f1b2949..a9ee411 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -10,6 +10,9 @@ config DRIVER_I2C_IMX config DRIVER_I2C_MC13892 bool "MC13892 a.k.a. PMIC driver" +config DRIVER_I2C_MC34704 + bool "MC34704 PMIC driver" + config DRIVER_I2C_MC9SDZ60 bool "MC9SDZ60 driver" diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 62d030b..13e5804 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -3,5 +3,6 @@ obj-$(CONFIG_I2C) += i2c.o obj-$(CONFIG_DRIVER_I2C_IMX) += i2c-imx.o obj-$(CONFIG_DRIVER_I2C_MC13892) += mc13892.o +obj-$(CONFIG_DRIVER_I2C_MC34704) += mc34704.o obj-$(CONFIG_DRIVER_I2C_MC9SDZ60) += mc9sdz60.o obj-$(CONFIG_DRIVER_I2C_LP3972) += lp3972.o diff --git a/drivers/i2c/mc34704.c b/drivers/i2c/mc34704.c new file mode 100644 index 0000000..51a8737 --- /dev/null +++ b/drivers/i2c/mc34704.c @@ -0,0 +1,140 @@ +/* + * Copyright (C) 2007 Sascha Hauer, Pengutronix + * 2009 Marc Kleine-Budde + * Copyright (C) 2010 Baruch Siach + * + * 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 + * + */ + +#include +#include +#include +#include +#include + +#include +#include + +#define DRIVERNAME "mc34704" + +#define to_mc34704(a) container_of(a, struct mc34704, cdev) + +static struct mc34704 *mc34704_dev; + +struct mc34704 *mc34704_get(void) +{ + if (!mc34704_dev) + return NULL; + + return mc34704_dev; +} +EXPORT_SYMBOL(mc34704_get); + +int mc34704_reg_read(struct mc34704 *mc34704, u8 reg, u8 *val) +{ + int ret; + + ret = i2c_read_reg(mc34704->client, reg, val, 1); + + return ret == 1 ? 0 : ret; +} +EXPORT_SYMBOL(mc34704_reg_read) + +int mc34704_reg_write(struct mc34704 *mc34704, u8 reg, u8 val) +{ + int ret; + + ret = i2c_write_reg(mc34704->client, reg, &val, 1); + + return ret == 1 ? 0 : ret; +} +EXPORT_SYMBOL(mc34704_reg_write) + +static ssize_t mc34704_read(struct cdev *cdev, void *_buf, size_t count, + ulong offset, ulong flags) +{ + struct mc34704 *priv = to_mc34704(cdev); + u8 *buf = _buf; + size_t i = count; + int err; + + while (i) { + err = mc34704_reg_read(priv, offset, buf); + if (err) + return (ssize_t)err; + buf++; + i--; + offset++; + } + + return count; +} + +static ssize_t mc34704_write(struct cdev *cdev, const void *_buf, size_t count, + ulong offset, ulong flags) +{ + struct mc34704 *mc34704 = to_mc34704(cdev); + const u8 *buf = _buf; + size_t i = count; + int err; + + while (i) { + err = mc34704_reg_write(mc34704, offset, *buf); + if (err) + return (ssize_t)err; + buf++; + i--; + offset++; + } + + return count; +} + +static struct file_operations mc34704_fops = { + .lseek = dev_lseek_default, + .read = mc34704_read, + .write = mc34704_write, +}; + +static int mc34704_probe(struct device_d *dev) +{ + if (mc34704_dev) + return -EBUSY; + + mc34704_dev = xzalloc(sizeof(struct mc34704)); + mc34704_dev->cdev.name = DRIVERNAME; + mc34704_dev->client = to_i2c_client(dev); + mc34704_dev->cdev.size = 256; + mc34704_dev->cdev.dev = dev; + mc34704_dev->cdev.ops = &mc34704_fops; + + devfs_create(&mc34704_dev->cdev); + + return 0; +} + +static struct driver_d mc34704_driver = { + .name = DRIVERNAME, + .probe = mc34704_probe, +}; + +static int mc34704_init(void) +{ + register_driver(&mc34704_driver); + return 0; +} +device_initcall(mc34704_init); diff --git a/include/i2c/mc34704.h b/include/i2c/mc34704.h new file mode 100644 index 0000000..a3723d7 --- /dev/null +++ b/include/i2c/mc34704.h @@ -0,0 +1,26 @@ +/* + * Copyright (C) 2009 Marc Kleine-Budde + * Copyright (C) 2010 Baruch Siach + * + * This file is released under the GPLv2 + * + * Derived from: + * - arch-mxc/pmic_external.h -- contains interface of the PMIC protocol driver + * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved. + * + */ + +#ifndef __I2C_MC34704_H +#define __I2C_MC34704_H + +struct mc34704 { + struct cdev cdev; + struct i2c_client *client; +}; + +extern struct mc34704 *mc34704_get(void); + +extern int mc34704_reg_read(struct mc34704 *mc34704, u8 reg, u8 *val); +extern int mc34704_reg_write(struct mc34704 *mc34704, u8 reg, u8 val); + +#endif /* __I2C_MC34704_H */ -- 1.7.1 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox