2010-01-06 15:04:18 -07:00
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/*
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2010-01-08 04:01:24 -07:00
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* I2C driver for Marvell 88PM860x
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2010-01-06 15:04:18 -07:00
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*
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* Copyright (C) 2009 Marvell International Ltd.
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* Haojian Zhuang <haojian.zhuang@marvell.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/i2c.h>
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2011-11-11 00:38:27 -07:00
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#include <linux/err.h>
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#include <linux/regmap.h>
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2010-01-08 04:01:24 -07:00
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#include <linux/mfd/88pm860x.h>
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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files. percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.
percpu.h -> slab.h dependency is about to be removed. Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability. As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.
http://userweb.kernel.org/~tj/misc/slabh-sweep.py
The script does the followings.
* Scan files for gfp and slab usages and update includes such that
only the necessary includes are there. ie. if only gfp is used,
gfp.h, if slab is used, slab.h.
* When the script inserts a new include, it looks at the include
blocks and try to put the new include such that its order conforms
to its surrounding. It's put in the include block which contains
core kernel includes, in the same order that the rest are ordered -
alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
doesn't seem to be any matching order.
* If the script can't find a place to put a new include (mostly
because the file doesn't have fitting include block), it prints out
an error message indicating which .h file needs to be added to the
file.
The conversion was done in the following steps.
1. The initial automatic conversion of all .c files updated slightly
over 4000 files, deleting around 700 includes and adding ~480 gfp.h
and ~3000 slab.h inclusions. The script emitted errors for ~400
files.
2. Each error was manually checked. Some didn't need the inclusion,
some needed manual addition while adding it to implementation .h or
embedding .c file was more appropriate for others. This step added
inclusions to around 150 files.
3. The script was run again and the output was compared to the edits
from #2 to make sure no file was left behind.
4. Several build tests were done and a couple of problems were fixed.
e.g. lib/decompress_*.c used malloc/free() wrappers around slab
APIs requiring slab.h to be added manually.
5. The script was run on all .h files but without automatically
editing them as sprinkling gfp.h and slab.h inclusions around .h
files could easily lead to inclusion dependency hell. Most gfp.h
inclusion directives were ignored as stuff from gfp.h was usually
wildly available and often used in preprocessor macros. Each
slab.h inclusion directive was examined and added manually as
necessary.
6. percpu.h was updated not to include slab.h.
7. Build test were done on the following configurations and failures
were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my
distributed build env didn't work with gcov compiles) and a few
more options had to be turned off depending on archs to make things
build (like ipr on powerpc/64 which failed due to missing writeq).
* x86 and x86_64 UP and SMP allmodconfig and a custom test config.
* powerpc and powerpc64 SMP allmodconfig
* sparc and sparc64 SMP allmodconfig
* ia64 SMP allmodconfig
* s390 SMP allmodconfig
* alpha SMP allmodconfig
* um on x86_64 SMP allmodconfig
8. percpu.h modifications were reverted so that it could be applied as
a separate patch and serve as bisection point.
Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.
Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 02:04:11 -06:00
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#include <linux/slab.h>
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2010-01-06 15:04:18 -07:00
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2010-01-08 04:01:24 -07:00
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int pm860x_reg_read(struct i2c_client *i2c, int reg)
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2010-01-06 15:04:18 -07:00
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{
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2010-01-08 04:01:24 -07:00
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struct pm860x_chip *chip = i2c_get_clientdata(i2c);
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2011-11-11 00:38:27 -07:00
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struct regmap *map = (i2c == chip->client) ? chip->regmap
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: chip->regmap_companion;
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unsigned int data;
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2010-01-06 15:04:18 -07:00
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int ret;
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2011-11-11 00:38:27 -07:00
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ret = regmap_read(map, reg, &data);
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2010-01-06 15:04:18 -07:00
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if (ret < 0)
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return ret;
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else
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return (int)data;
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}
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2010-01-08 04:01:24 -07:00
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EXPORT_SYMBOL(pm860x_reg_read);
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2010-01-06 15:04:18 -07:00
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2010-01-08 04:01:24 -07:00
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int pm860x_reg_write(struct i2c_client *i2c, int reg,
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2010-01-06 15:04:18 -07:00
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unsigned char data)
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{
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2010-01-08 04:01:24 -07:00
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struct pm860x_chip *chip = i2c_get_clientdata(i2c);
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2011-11-11 00:38:27 -07:00
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struct regmap *map = (i2c == chip->client) ? chip->regmap
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: chip->regmap_companion;
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2010-01-06 15:04:18 -07:00
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int ret;
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2011-11-11 00:38:27 -07:00
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ret = regmap_write(map, reg, data);
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2010-01-06 15:04:18 -07:00
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return ret;
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}
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2010-01-08 04:01:24 -07:00
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EXPORT_SYMBOL(pm860x_reg_write);
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2010-01-06 15:04:18 -07:00
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2010-01-08 04:01:24 -07:00
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int pm860x_bulk_read(struct i2c_client *i2c, int reg,
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2010-01-06 15:04:18 -07:00
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int count, unsigned char *buf)
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{
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2010-01-08 04:01:24 -07:00
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struct pm860x_chip *chip = i2c_get_clientdata(i2c);
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2011-11-11 00:38:27 -07:00
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struct regmap *map = (i2c == chip->client) ? chip->regmap
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: chip->regmap_companion;
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2010-01-06 15:04:18 -07:00
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int ret;
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2011-11-11 00:38:27 -07:00
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ret = regmap_raw_read(map, reg, buf, count);
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2010-01-06 15:04:18 -07:00
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return ret;
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}
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2010-01-08 04:01:24 -07:00
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EXPORT_SYMBOL(pm860x_bulk_read);
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2010-01-06 15:04:18 -07:00
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2010-01-08 04:01:24 -07:00
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int pm860x_bulk_write(struct i2c_client *i2c, int reg,
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2010-01-06 15:04:18 -07:00
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int count, unsigned char *buf)
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{
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2010-01-08 04:01:24 -07:00
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struct pm860x_chip *chip = i2c_get_clientdata(i2c);
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2011-11-11 00:38:27 -07:00
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struct regmap *map = (i2c == chip->client) ? chip->regmap
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: chip->regmap_companion;
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2010-01-06 15:04:18 -07:00
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int ret;
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2011-11-11 00:38:27 -07:00
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ret = regmap_raw_write(map, reg, buf, count);
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2010-01-06 15:04:18 -07:00
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return ret;
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}
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2010-01-08 04:01:24 -07:00
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EXPORT_SYMBOL(pm860x_bulk_write);
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2010-01-06 15:04:18 -07:00
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2010-01-08 04:01:24 -07:00
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int pm860x_set_bits(struct i2c_client *i2c, int reg,
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2010-01-06 15:04:18 -07:00
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unsigned char mask, unsigned char data)
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{
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2010-01-08 04:01:24 -07:00
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struct pm860x_chip *chip = i2c_get_clientdata(i2c);
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2011-11-11 00:38:27 -07:00
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struct regmap *map = (i2c == chip->client) ? chip->regmap
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: chip->regmap_companion;
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2010-01-06 15:04:18 -07:00
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int ret;
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2011-11-11 00:38:27 -07:00
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ret = regmap_update_bits(map, reg, mask, data);
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2010-01-06 15:04:18 -07:00
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return ret;
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}
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2010-01-08 04:01:24 -07:00
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EXPORT_SYMBOL(pm860x_set_bits);
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2010-01-06 15:04:18 -07:00
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2011-11-11 00:38:26 -07:00
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static int read_device(struct i2c_client *i2c, int reg,
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int bytes, void *dest)
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{
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unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3];
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unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2];
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struct i2c_adapter *adap = i2c->adapter;
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struct i2c_msg msg[2] = {{i2c->addr, 0, 1, msgbuf0},
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{i2c->addr, I2C_M_RD, 0, msgbuf1},
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};
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int num = 1, ret = 0;
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if (dest == NULL)
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return -EINVAL;
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msgbuf0[0] = (unsigned char)reg; /* command */
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msg[1].len = bytes;
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/* if data needs to read back, num should be 2 */
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if (bytes > 0)
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num = 2;
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ret = adap->algo->master_xfer(adap, msg, num);
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memcpy(dest, msgbuf1, bytes);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int write_device(struct i2c_client *i2c, int reg,
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int bytes, void *src)
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{
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unsigned char buf[bytes + 1];
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struct i2c_adapter *adap = i2c->adapter;
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struct i2c_msg msg;
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int ret;
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buf[0] = (unsigned char)reg;
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memcpy(&buf[1], src, bytes);
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msg.addr = i2c->addr;
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msg.flags = 0;
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msg.len = bytes + 1;
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msg.buf = buf;
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ret = adap->algo->master_xfer(adap, &msg, 1);
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if (ret < 0)
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return ret;
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return 0;
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}
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2011-03-07 08:43:16 -07:00
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int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
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{
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unsigned char zero = 0;
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unsigned char data;
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int ret;
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2011-11-11 00:38:26 -07:00
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i2c_lock_adapter(i2c->adapter);
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read_device(i2c, 0xFA, 0, &zero);
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read_device(i2c, 0xFB, 0, &zero);
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read_device(i2c, 0xFF, 0, &zero);
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ret = read_device(i2c, reg, 1, &data);
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2011-03-07 08:43:16 -07:00
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if (ret >= 0)
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ret = (int)data;
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2011-11-11 00:38:26 -07:00
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read_device(i2c, 0xFE, 0, &zero);
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read_device(i2c, 0xFC, 0, &zero);
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i2c_unlock_adapter(i2c->adapter);
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2011-03-07 08:43:16 -07:00
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return ret;
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}
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EXPORT_SYMBOL(pm860x_page_reg_read);
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int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
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unsigned char data)
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{
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unsigned char zero;
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int ret;
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2011-11-11 00:38:26 -07:00
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i2c_lock_adapter(i2c->adapter);
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read_device(i2c, 0xFA, 0, &zero);
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read_device(i2c, 0xFB, 0, &zero);
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read_device(i2c, 0xFF, 0, &zero);
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ret = write_device(i2c, reg, 1, &data);
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read_device(i2c, 0xFE, 0, &zero);
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read_device(i2c, 0xFC, 0, &zero);
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i2c_unlock_adapter(i2c->adapter);
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2011-03-07 08:43:16 -07:00
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return ret;
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}
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EXPORT_SYMBOL(pm860x_page_reg_write);
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int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
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int count, unsigned char *buf)
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{
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unsigned char zero = 0;
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int ret;
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2011-11-11 00:38:26 -07:00
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i2c_lock_adapter(i2c->adapter);
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read_device(i2c, 0xfa, 0, &zero);
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read_device(i2c, 0xfb, 0, &zero);
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read_device(i2c, 0xff, 0, &zero);
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ret = read_device(i2c, reg, count, buf);
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read_device(i2c, 0xFE, 0, &zero);
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read_device(i2c, 0xFC, 0, &zero);
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i2c_unlock_adapter(i2c->adapter);
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2011-03-07 08:43:16 -07:00
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return ret;
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}
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EXPORT_SYMBOL(pm860x_page_bulk_read);
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int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
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int count, unsigned char *buf)
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{
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unsigned char zero = 0;
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int ret;
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2011-11-11 00:38:26 -07:00
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i2c_lock_adapter(i2c->adapter);
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read_device(i2c, 0xFA, 0, &zero);
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read_device(i2c, 0xFB, 0, &zero);
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read_device(i2c, 0xFF, 0, &zero);
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ret = write_device(i2c, reg, count, buf);
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read_device(i2c, 0xFE, 0, &zero);
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read_device(i2c, 0xFC, 0, &zero);
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i2c_unlock_adapter(i2c->adapter);
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i2c_unlock_adapter(i2c->adapter);
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2011-03-07 08:43:16 -07:00
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return ret;
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}
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EXPORT_SYMBOL(pm860x_page_bulk_write);
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int pm860x_page_set_bits(struct i2c_client *i2c, int reg,
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unsigned char mask, unsigned char data)
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{
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unsigned char zero;
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unsigned char value;
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int ret;
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2011-11-11 00:38:26 -07:00
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i2c_lock_adapter(i2c->adapter);
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read_device(i2c, 0xFA, 0, &zero);
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read_device(i2c, 0xFB, 0, &zero);
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read_device(i2c, 0xFF, 0, &zero);
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ret = read_device(i2c, reg, 1, &value);
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2011-03-07 08:43:16 -07:00
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if (ret < 0)
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goto out;
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value &= ~mask;
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value |= data;
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2011-11-11 00:38:26 -07:00
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ret = write_device(i2c, reg, 1, &value);
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2011-03-07 08:43:16 -07:00
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out:
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2011-11-11 00:38:26 -07:00
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read_device(i2c, 0xFE, 0, &zero);
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read_device(i2c, 0xFC, 0, &zero);
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i2c_unlock_adapter(i2c->adapter);
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2011-03-07 08:43:16 -07:00
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return ret;
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}
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EXPORT_SYMBOL(pm860x_page_set_bits);
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2010-01-06 15:04:18 -07:00
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static const struct i2c_device_id pm860x_id_table[] = {
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2010-01-08 04:01:24 -07:00
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{ "88PM860x", 0 },
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2010-01-06 15:04:18 -07:00
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{}
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};
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MODULE_DEVICE_TABLE(i2c, pm860x_id_table);
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2010-01-08 04:01:24 -07:00
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static int verify_addr(struct i2c_client *i2c)
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{
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unsigned short addr_8607[] = {0x30, 0x34};
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unsigned short addr_8606[] = {0x10, 0x11};
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int size, i;
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if (i2c == NULL)
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return 0;
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size = ARRAY_SIZE(addr_8606);
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for (i = 0; i < size; i++) {
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if (i2c->addr == *(addr_8606 + i))
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return CHIP_PM8606;
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}
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size = ARRAY_SIZE(addr_8607);
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for (i = 0; i < size; i++) {
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if (i2c->addr == *(addr_8607 + i))
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|
|
return CHIP_PM8607;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2011-11-11 00:38:27 -07:00
|
|
|
static struct regmap_config pm860x_regmap_config = {
|
|
|
|
.reg_bits = 8,
|
|
|
|
.val_bits = 8,
|
|
|
|
};
|
|
|
|
|
2010-01-06 15:04:18 -07:00
|
|
|
static int __devinit pm860x_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
2010-01-08 04:01:24 -07:00
|
|
|
struct pm860x_platform_data *pdata = client->dev.platform_data;
|
2010-02-03 13:38:12 -07:00
|
|
|
struct pm860x_chip *chip;
|
2011-11-11 00:38:27 -07:00
|
|
|
int ret;
|
2010-02-03 13:38:12 -07:00
|
|
|
|
|
|
|
if (!pdata) {
|
2010-01-08 04:01:24 -07:00
|
|
|
pr_info("No platform data in %s!\n", __func__);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2010-02-03 13:38:12 -07:00
|
|
|
chip = kzalloc(sizeof(struct pm860x_chip), GFP_KERNEL);
|
|
|
|
if (chip == NULL)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
chip->id = verify_addr(client);
|
2011-11-11 00:38:27 -07:00
|
|
|
chip->regmap = regmap_init_i2c(client, &pm860x_regmap_config);
|
|
|
|
if (IS_ERR(chip->regmap)) {
|
|
|
|
ret = PTR_ERR(chip->regmap);
|
|
|
|
dev_err(&client->dev, "Failed to allocate register map: %d\n",
|
|
|
|
ret);
|
2011-12-23 10:39:26 -07:00
|
|
|
kfree(chip);
|
2011-11-11 00:38:27 -07:00
|
|
|
return ret;
|
|
|
|
}
|
2010-02-03 13:38:12 -07:00
|
|
|
chip->client = client;
|
|
|
|
i2c_set_clientdata(client, chip);
|
|
|
|
chip->dev = &client->dev;
|
|
|
|
dev_set_drvdata(chip->dev, chip);
|
|
|
|
|
2010-01-08 04:01:24 -07:00
|
|
|
/*
|
|
|
|
* Both client and companion client shares same platform driver.
|
|
|
|
* Driver distinguishes them by pdata->companion_addr.
|
|
|
|
* pdata->companion_addr is only assigned if companion chip exists.
|
|
|
|
* At the same time, the companion_addr shouldn't equal to client
|
|
|
|
* address.
|
|
|
|
*/
|
2010-02-03 13:38:12 -07:00
|
|
|
if (pdata->companion_addr && (pdata->companion_addr != client->addr)) {
|
|
|
|
chip->companion_addr = pdata->companion_addr;
|
|
|
|
chip->companion = i2c_new_dummy(chip->client->adapter,
|
|
|
|
chip->companion_addr);
|
2011-11-11 00:38:27 -07:00
|
|
|
chip->regmap_companion = regmap_init_i2c(chip->companion,
|
|
|
|
&pm860x_regmap_config);
|
|
|
|
if (IS_ERR(chip->regmap_companion)) {
|
|
|
|
ret = PTR_ERR(chip->regmap_companion);
|
|
|
|
dev_err(&chip->companion->dev,
|
|
|
|
"Failed to allocate register map: %d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
2010-01-08 04:01:24 -07:00
|
|
|
i2c_set_clientdata(chip->companion, chip);
|
|
|
|
}
|
2010-02-03 13:38:12 -07:00
|
|
|
|
|
|
|
pm860x_device_init(chip, pdata);
|
2010-01-06 15:04:18 -07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int __devexit pm860x_remove(struct i2c_client *client)
|
|
|
|
{
|
2010-01-08 04:01:24 -07:00
|
|
|
struct pm860x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
pm860x_device_exit(chip);
|
2011-11-11 00:38:27 -07:00
|
|
|
if (chip->companion) {
|
|
|
|
regmap_exit(chip->regmap_companion);
|
|
|
|
i2c_unregister_device(chip->companion);
|
|
|
|
}
|
|
|
|
regmap_exit(chip->regmap);
|
2010-01-06 15:04:18 -07:00
|
|
|
kfree(chip);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2012-02-27 07:44:20 -07:00
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int pm860x_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
|
|
|
|
struct pm860x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
if (device_may_wakeup(dev) && chip->wakeup_flag)
|
|
|
|
enable_irq_wake(chip->core_irq);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int pm860x_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
|
|
|
|
struct pm860x_chip *chip = i2c_get_clientdata(client);
|
|
|
|
|
|
|
|
if (device_may_wakeup(dev) && chip->wakeup_flag)
|
|
|
|
disable_irq_wake(chip->core_irq);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static SIMPLE_DEV_PM_OPS(pm860x_pm_ops, pm860x_suspend, pm860x_resume);
|
|
|
|
|
2010-01-06 15:04:18 -07:00
|
|
|
static struct i2c_driver pm860x_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "88PM860x",
|
|
|
|
.owner = THIS_MODULE,
|
2012-02-27 07:44:20 -07:00
|
|
|
.pm = &pm860x_pm_ops,
|
2010-01-06 15:04:18 -07:00
|
|
|
},
|
|
|
|
.probe = pm860x_probe,
|
|
|
|
.remove = __devexit_p(pm860x_remove),
|
|
|
|
.id_table = pm860x_id_table,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init pm860x_i2c_init(void)
|
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
ret = i2c_add_driver(&pm860x_driver);
|
|
|
|
if (ret != 0)
|
|
|
|
pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
subsys_initcall(pm860x_i2c_init);
|
|
|
|
|
|
|
|
static void __exit pm860x_i2c_exit(void)
|
|
|
|
{
|
|
|
|
i2c_del_driver(&pm860x_driver);
|
|
|
|
}
|
|
|
|
module_exit(pm860x_i2c_exit);
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("I2C Driver for Marvell 88PM860x");
|
|
|
|
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
|
|
|
|
MODULE_LICENSE("GPL");
|