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author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-05 13:33:09 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-05 13:33:09 +0200 |
commit | cdfca5dccb21258eccd549604a8481020d5f3e9f (patch) | |
tree | 504faa1faa36ba0bc189cb5d9e1beda924dead56 /drivers/mfd | |
parent | 845f765b6e7f5830b14c7910203d271c43e6af6a (diff) | |
parent | 903b1d430904588ef9f6b2f897b46e3e3cc4516a (diff) | |
download | barebox-cdfca5dccb21258eccd549604a8481020d5f3e9f.tar.gz barebox-cdfca5dccb21258eccd549604a8481020d5f3e9f.tar.xz |
Merge branch 'for-next/rockchip'
Diffstat (limited to 'drivers/mfd')
-rw-r--r-- | drivers/mfd/Kconfig | 4 | ||||
-rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
-rw-r--r-- | drivers/mfd/act8846.c | 154 |
3 files changed, 159 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 887376427c..3af904dd6d 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 2ad766da1b..49b9e35663 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 0000000000..60029acf76 --- /dev/null +++ b/drivers/mfd/act8846.c @@ -0,0 +1,154 @@ +/* + * Copyright (C) 2007 Sascha Hauer, Pengutronix + * 2009 Marc Kleine-Budde <mkl@pengutronix.de> + * + * 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 <common.h> +#include <init.h> +#include <driver.h> +#include <xfuncs.h> +#include <errno.h> + +#include <i2c/i2c.h> +#include <mfd/act8846.h> + +#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); |