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author | Sascha Hauer <s.hauer@pengutronix.de> | 2010-10-10 19:36:19 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2010-10-11 13:22:13 +0200 |
commit | 2ebb440e1d92c60f47a0d89b7666f190caf38561 (patch) | |
tree | 3e361fe34257ce37463dec5b6d129bc52258fb7b /drivers/mfd/mc9sdz60.c | |
parent | 8f14d065e1e39d88949ee489acfe6f7faa51f1b1 (diff) | |
download | barebox-2ebb440e1d92c60f47a0d89b7666f190caf38561.tar.gz barebox-2ebb440e1d92c60f47a0d89b7666f190caf38561.tar.xz |
Move mfd drivers to drivers/mfd
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mfd/mc9sdz60.c')
-rw-r--r-- | drivers/mfd/mc9sdz60.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/mfd/mc9sdz60.c b/drivers/mfd/mc9sdz60.c new file mode 100644 index 0000000000..3580af8852 --- /dev/null +++ b/drivers/mfd/mc9sdz60.c @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2007 Sascha Hauer, Pengutronix + * 2009 Marc Kleine-Budde <mkl@pengutronix.de> + * + * 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 <common.h> +#include <init.h> +#include <driver.h> +#include <xfuncs.h> +#include <errno.h> + +#include <i2c/i2c.h> +#include <i2c/mc9sdz60.h> + +#define DRIVERNAME "mc9sdz60" + +#define to_mc9sdz60(a) container_of(a, struct mc9sdz60, cdev) + +static struct mc9sdz60 *mc_dev; + +struct mc9sdz60 *mc9sdz60_get(void) +{ + if (!mc_dev) + return NULL; + + return mc_dev; +} +EXPORT_SYMBOL(mc9sdz60_get); + +int mc9sdz60_reg_read(struct mc9sdz60 *mc9sdz60, enum mc9sdz60_reg reg, u8 *val) +{ + int ret; + + ret = i2c_read_reg(mc9sdz60->client, reg, val, 1); + + return ret == 1 ? 0 : ret; +} +EXPORT_SYMBOL(mc9sdz60_reg_read) + +int mc9sdz60_reg_write(struct mc9sdz60 *mc9sdz60, enum mc9sdz60_reg reg, u8 val) +{ + int ret; + + ret = i2c_write_reg(mc9sdz60->client, reg, &val, 1); + + return ret == 1 ? 0 : ret; +} +EXPORT_SYMBOL(mc9sdz60_reg_write) + +int mc9sdz60_set_bits(struct mc9sdz60 *mc9sdz60, enum mc9sdz60_reg reg, u8 mask, u8 val) +{ + u8 tmp; + int err; + + err = mc9sdz60_reg_read(mc9sdz60, reg, &tmp); + tmp = (tmp & ~mask) | val; + + if (!err) + err = mc9sdz60_reg_write(mc9sdz60, reg, tmp); + + return err; +} +EXPORT_SYMBOL(mc9sdz60_set_bits); + +static ssize_t mc_read(struct cdev *cdev, void *_buf, size_t count, ulong offset, ulong flags) +{ + struct mc9sdz60 *mc9sdz60 = to_mc9sdz60(cdev); + u8 *buf = _buf; + size_t i = count; + int err; + + while (i) { + err = mc9sdz60_reg_read(mc9sdz60, offset, buf); + if (err) + return (ssize_t)err; + buf++; + i--; + offset++; + } + + return count; +} + +static ssize_t mc_write(struct cdev *cdev, const void *_buf, size_t count, ulong offset, ulong flags) +{ + struct mc9sdz60 *mc9sdz60 = to_mc9sdz60(cdev); + const u8 *buf = _buf; + size_t i = count; + int err; + + while (i) { + err = mc9sdz60_reg_write(mc9sdz60, offset, *buf); + if (err) + return (ssize_t)err; + buf++; + i--; + offset++; + } + + return count; +} + +static struct file_operations mc_fops = { + .lseek = dev_lseek_default, + .read = mc_read, + .write = mc_write, +}; + +static int mc_probe(struct device_d *dev) +{ + if (mc_dev) + return -EBUSY; + + mc_dev = xzalloc(sizeof(struct mc9sdz60)); + mc_dev->cdev.name = DRIVERNAME; + mc_dev->client = to_i2c_client(dev); + mc_dev->cdev.size = 64; /* 35 known registers */ + mc_dev->cdev.dev = dev; + mc_dev->cdev.ops = &mc_fops; + + devfs_create(&mc_dev->cdev); + + return 0; +} + +static struct driver_d mc_driver = { + .name = DRIVERNAME, + .probe = mc_probe, +}; + +static int mc_init(void) +{ + register_driver(&mc_driver); + return 0; +} + +device_initcall(mc_init); |