From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp4-g21.free.fr ([212.27.42.4]) by bombadil.infradead.org with esmtp (Exim 4.69 #1 (Red Hat Linux)) id 1NVjlD-0001ei-9k for barebox@lists.infradead.org; Fri, 15 Jan 2010 10:50:44 +0000 From: Eric Benard Date: Fri, 15 Jan 2010 11:50:18 +0100 Message-Id: <1263552619-4601-3-git-send-email-eric@eukrea.com> In-Reply-To: <1263552619-4601-2-git-send-email-eric@eukrea.com> References: <1263552619-4601-1-git-send-email-eric@eukrea.com> <1263552619-4601-2-git-send-email-eric@eukrea.com> 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 3/4] I2C : add NS LP3972 PMIC support To: s.hauer@pengutronix.de Cc: barebox@lists.infradead.org Signed-off-by: Eric Benard --- drivers/i2c/Kconfig | 3 + drivers/i2c/Makefile | 1 + drivers/i2c/lp3972.c | 110 ++++++++++++++++++++++++++++++++++++++++++++++++++ include/i2c/lp3972.h | 7 +++ 4 files changed, 121 insertions(+), 0 deletions(-) create mode 100644 drivers/i2c/lp3972.c create mode 100644 include/i2c/lp3972.h diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig index 46723ed..f1b2949 100644 --- a/drivers/i2c/Kconfig +++ b/drivers/i2c/Kconfig @@ -13,4 +13,7 @@ config DRIVER_I2C_MC13892 config DRIVER_I2C_MC9SDZ60 bool "MC9SDZ60 driver" +config DRIVER_I2C_LP3972 + bool "LP3972 driver" + endif diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile index 5dd642f..62d030b 100644 --- a/drivers/i2c/Makefile +++ b/drivers/i2c/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_DRIVER_I2C_IMX) += i2c-imx.o obj-$(CONFIG_DRIVER_I2C_MC13892) += mc13892.o obj-$(CONFIG_DRIVER_I2C_MC9SDZ60) += mc9sdz60.o +obj-$(CONFIG_DRIVER_I2C_LP3972) += lp3972.o diff --git a/drivers/i2c/lp3972.c b/drivers/i2c/lp3972.c new file mode 100644 index 0000000..9826699 --- /dev/null +++ b/drivers/i2c/lp3972.c @@ -0,0 +1,110 @@ +/* + * Copyright (C) 2007 Sascha Hauer, Pengutronix + * 2009 Marc Kleine-Budde + * 2009 Eric Benard + * + * 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 "lp3972" + +struct lp_priv { + struct cdev cdev; + struct i2c_client *client; +}; + +#define to_lp_priv(a) container_of(a, struct lp_priv, cdev) + +static struct lp_priv *lp_dev; + +struct i2c_client *lp3972_get_client(void) +{ + if (!lp_dev) + return NULL; + + return lp_dev->client; +} + +static u32 lp_read_reg(struct lp_priv *lp, int reg) +{ + u8 buf; + + i2c_read_reg(lp->client, reg, &buf, sizeof(buf)); + + return buf; +} + +static ssize_t lp_read(struct cdev *cdev, void *_buf, size_t count, ulong offset, ulong flags) +{ + struct lp_priv *priv = to_lp_priv(cdev); + int i = count; + u8 *buf = _buf; + + while (i) { + *buf = lp_read_reg(priv, offset); + buf++; + i--; + offset++; + } + + return count; +} + +static struct file_operations lp_fops = { + .lseek = dev_lseek_default, + .read = lp_read, +}; + +static int lp_probe(struct device_d *dev) +{ + if (lp_dev) + return -EBUSY; + + lp_dev = xzalloc(sizeof(struct lp_priv)); + lp_dev->cdev.name = DRIVERNAME; + lp_dev->client = to_i2c_client(dev); + lp_dev->cdev.size = 256; + lp_dev->cdev.dev = dev; + lp_dev->cdev.ops = &lp_fops; + + devfs_create(&lp_dev->cdev); + + return 0; +} + +static struct driver_d lp_driver = { + .name = DRIVERNAME, + .probe = lp_probe, +}; + +static int lp_init(void) +{ + register_driver(&lp_driver); + return 0; +} + +device_initcall(lp_init); diff --git a/include/i2c/lp3972.h b/include/i2c/lp3972.h new file mode 100644 index 0000000..edb5801 --- /dev/null +++ b/include/i2c/lp3972.h @@ -0,0 +1,7 @@ +#ifndef __ASM_ARCH_LP3972_H +#define __ASM_ARCH_LP3972_H + +extern struct i2c_client *lp3972_get_client(void); + +#endif /* __ASM_ARCH_LP3972_H */ + -- 1.6.3.3 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox