From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ee0-x232.google.com ([2a00:1450:4013:c00::232]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WeLQt-0007sD-4v for barebox@lists.infradead.org; Sun, 27 Apr 2014 09:31:36 +0000 Received: by mail-ee0-f50.google.com with SMTP id c13so3964016eek.9 for ; Sun, 27 Apr 2014 02:31:10 -0700 (PDT) From: Beniamino Galvani Date: Sun, 27 Apr 2014 11:30:35 +0200 Message-Id: <1398591044-3616-3-git-send-email-b.galvani@gmail.com> In-Reply-To: <1398591044-3616-1-git-send-email-b.galvani@gmail.com> References: <1398591044-3616-1-git-send-email-b.galvani@gmail.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" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 02/11] mfd: add act8846 driver To: barebox@lists.infradead.org Signed-off-by: Beniamino Galvani --- drivers/mfd/Kconfig | 4 ++ drivers/mfd/Makefile | 1 + drivers/mfd/act8846.c | 154 +++++++++++++++++++++++++++++++++++++++++++++++++ include/mfd/act8846.h | 56 ++++++++++++++++++ 4 files changed, 215 insertions(+) create mode 100644 drivers/mfd/act8846.c create mode 100644 include/mfd/act8846.h diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 8873764..3af904d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -1,5 +1,9 @@ menu MFD +config MFD_ACT8846 + depends on I2C + bool "ACT8846 driver" + config MFD_LP3972 depends on I2C bool "LP3972 driver" diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 2ad766d..49b9e35 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_MFD_ACT8846) += act8846.o obj-$(CONFIG_MFD_LP3972) += lp3972.o obj-$(CONFIG_MFD_MC13XXX) += mc13xxx.o obj-$(CONFIG_MFD_MC34704) += mc34704.o diff --git a/drivers/mfd/act8846.c b/drivers/mfd/act8846.c new file mode 100644 index 0000000..60029ac --- /dev/null +++ b/drivers/mfd/act8846.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2007 Sascha Hauer, Pengutronix + * 2009 Marc Kleine-Budde + * + * Copied from drivers/mfd/mc9sdz60.c + * + * 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. + * + * + */ + +#include +#include +#include +#include +#include + +#include +#include + +#define DRIVERNAME "act8846" + +#define to_act8846(a) container_of(a, struct act8846, cdev) + +static struct act8846 *act8846_dev; + +struct act8846 *act8846_get(void) +{ + if (!act8846_dev) + return NULL; + + return act8846_dev; +} +EXPORT_SYMBOL(act8846_get); + +int act8846_reg_read(struct act8846 *act8846, enum act8846_reg reg, u8 *val) +{ + int ret; + + ret = i2c_read_reg(act8846->client, reg, val, 1); + + return ret == 1 ? 0 : ret; +} +EXPORT_SYMBOL(act8846_reg_read); + +int act8846_reg_write(struct act8846 *act8846, enum act8846_reg reg, u8 val) +{ + int ret; + + ret = i2c_write_reg(act8846->client, reg, &val, 1); + + return ret == 1 ? 0 : ret; +} +EXPORT_SYMBOL(act8846_reg_write); + +int act8846_set_bits(struct act8846 *act8846, enum act8846_reg reg, + u8 mask, u8 val) +{ + u8 tmp; + int err; + + err = act8846_reg_read(act8846, reg, &tmp); + tmp = (tmp & ~mask) | val; + + if (!err) + err = act8846_reg_write(act8846, reg, tmp); + + return err; +} +EXPORT_SYMBOL(act8846_set_bits); + +static ssize_t act8846_read(struct cdev *cdev, void *_buf, size_t count, + loff_t offset, ulong flags) +{ + struct act8846 *act8846 = to_act8846(cdev); + u8 *buf = _buf; + size_t i = count; + int err; + + while (i) { + err = act8846_reg_read(act8846, offset, buf); + if (err) + return (ssize_t)err; + buf++; + i--; + offset++; + } + + return count; +} + +static ssize_t act8846_write(struct cdev *cdev, const void *_buf, size_t count, + loff_t offset, ulong flags) +{ + struct act8846 *act8846 = to_act8846(cdev); + const u8 *buf = _buf; + size_t i = count; + int err; + + while (i) { + err = act8846_reg_write(act8846, offset, *buf); + if (err) + return (ssize_t)err; + buf++; + i--; + offset++; + } + + return count; +} + +static struct file_operations act8846_fops = { + .lseek = dev_lseek_default, + .read = act8846_read, + .write = act8846_write, +}; + +static int act8846_probe(struct device_d *dev) +{ + if (act8846_dev) + return -EBUSY; + + act8846_dev = xzalloc(sizeof(struct act8846)); + act8846_dev->cdev.name = DRIVERNAME; + act8846_dev->client = to_i2c_client(dev); + act8846_dev->cdev.size = 64; + act8846_dev->cdev.dev = dev; + act8846_dev->cdev.ops = &act8846_fops; + + devfs_create(&act8846_dev->cdev); + + return 0; +} + +static struct driver_d act8846_driver = { + .name = DRIVERNAME, + .probe = act8846_probe, +}; + +static int act8846_init(void) +{ + i2c_driver_register(&act8846_driver); + return 0; +} + +device_initcall(act8846_init); diff --git a/include/mfd/act8846.h b/include/mfd/act8846.h new file mode 100644 index 0000000..011fe20 --- /dev/null +++ b/include/mfd/act8846.h @@ -0,0 +1,56 @@ +/* + * Copyright (C) 2009 Marc Kleine-Budde + * + * This file is released under the GPLv2 + * + * Derived from mc9sdz60.h + */ + +#ifndef _ACT8846_H +#define _ACT8846_H + +enum act8846_reg { + ACT8846_SYS_MODE = 0x00, + ACT8846_SYS_CTRL = 0x01, + ACT8846_DCDC1_VSET1 = 0x10, + ACT8846_DCDC1_CTRL = 0x12, + ACT8846_DCDC2_VSET1 = 0x20, + ACT8846_DCDC2_VSET2 = 0x21, + ACT8846_DCDC2_CTRL = 0x22, + ACT8846_DCDC3_VSET1 = 0x30, + ACT8846_DCDC3_VSET2 = 0x31, + ACT8846_DCDC3_CTRL = 0x32, + ACT8846_DCDC4_VSET1 = 0x40, + ACT8846_DCDC4_VSET2 = 0x41, + ACT8846_DCDC4_CTRL = 0x42, + ACT8846_LDO5_VSET = 0x50, + ACT8846_LDO5_CTRL = 0x51, + ACT8846_LDO6_VSET = 0x58, + ACT8846_LDO6_CTRL = 0x59, + ACT8846_LDO7_VSET = 0x60, + ACT8846_LDO7_CTRL = 0x61, + ACT8846_LDO8_VSET = 0x68, + ACT8846_LDO8_CTRL = 0x69, + ACT8846_LDO9_VSET = 0x70, + ACT8846_LDO9_CTRL = 0x71, + ACT8846_LDO10_VSET = 0x80, + ACT8846_LDO10_CTRL = 0x81, + ACT8846_LDO11_VSET = 0x90, + ACT8846_LDO11_CTRL = 0x91, + ACT8846_LDO12_VSET = 0xA0, + ACT8846_LDO12_CTRL = 0xA1, +}; + +struct act8846 { + struct cdev cdev; + struct i2c_client *client; +}; + +struct act8846 *act8846_get(void); + +int act8846_reg_read(struct act8846 *priv, enum act8846_reg reg, u8 *val); +int act8846_reg_write(struct act8846 *priv, enum act8846_reg reg, u8 val); +int act8846_set_bits(struct act8846 *priv, enum act8846_reg reg, + u8 mask, u8 val); + +#endif /* _ACT8846_H */ -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox