linux/drivers/mfd/syscon.c
Linus Torvalds 8de4651abe For the 3.12 merge window we have one new driver for the DA9063 PMIC
from Dialog Semiconductor.
 
 Besides that driver we also have:
 
 - Device tree support for the s2mps11 driver
 
 - More devm_* conversion for the pm8921, max89xx, menelaus, tps65010,
   wl1273 and pcf50633-adc drivers.
 
 - A conversion to threaded IRQ and IRQ domain for the twl6030 driver.
 
 - A fairly big update for the rtsx driver: Better power saving support,
   better vendor settings handling, and a few fixes.
 
 - Support for a couple more boards (COMe-bHL6 and COMe-cTH6) for the
   Kontron driver.
 
 - A conversion to the dev_get_platdata() API for all MFD drivers.
 
 - A removal of non-DT (legacy) support for the twl6040 driver.
 
 - A few fixes and additions (Mic detect level) to the wm5110 register tables.
 
 - Regmap support for the davinci_voicecodec driver.
 
 - The usual bunch of minor cleanups and janitorial fixes.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJSKFnjAAoJEIqAPN1PVmxKU9AP/RAmSYux6c+cd7P7roXL+/lA
 qNKy8Op31J51N/n918o7zwbskmRIJJsbd+I6ClBlYdCUB+B8/Oj41uD4F+q35b/H
 F5Xm2XRPQAGHx37m5adJMrK/OR3zCTwhPjleJYOJWIFjDP/nDNJIPwTYb13Rqurh
 V39icmRtnNR0uDOmv3eELyV4FnWQTpA858dxuhSi+5jbbHFhCcYShEmE9109eexl
 RNuyF8d0KPGvnKhK+H1/k4ZYG2XAFFOZfZz9MB+l651nidqDvwJph0Zdj3w1r112
 8OR5i7B3vw268nmyjOOUtYqL2vOaUW4lavmLTQiSdQWd1BHv9hEmD0RRR5bSrLeH
 6DwCTh0+xWH08ogbMwi4dwZyRhjxMPMpkxeNz51TpRnXKDSZmBgrjovKNJpP8pW6
 m7RsgUC9AiEQf/Ac0PBMrU8ABKeJnt3K3ZZp4YN7/H6rAMOhXjLqFD8JLoFvx08z
 itKKSzVaIA3pzxpnkWWiTsr+bChaSOrHHy1biWa4ve5pvrFc9ivPz1DhL3PTmXpp
 haeeylFG01r5NJIHeJewRsmUJk67aEyeAnnoLwqCRycWjdDmcCBC5bgDBkRRonoS
 93tgKVzL9q/NwvT5Uatw3uYqTN0jOuH0t39gAzu9uwnWvivcZK5EBYh789YQL+on
 zih4qUICM08yWRDNNDgF
 =a7dU
 -----END PGP SIGNATURE-----

Merge tag 'mfd-3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next

Pull MFD (multi-function device) updates from Samuel Ortiz:
 "For the 3.12 merge window we have one new driver for the DA9063 PMIC
  from Dialog Semiconductor.

  Besides that driver we also have:

   - Device tree support for the s2mps11 driver

   - More devm_* conversion for the pm8921, max89xx, menelaus, tps65010,
     wl1273 and pcf50633-adc drivers.

   - A conversion to threaded IRQ and IRQ domain for the twl6030 driver.

   - A fairly big update for the rtsx driver: Better power saving
     support, better vendor settings handling, and a few fixes.

   - Support for a couple more boards (COMe-bHL6 and COMe-cTH6) for the
     Kontron driver.

   - A conversion to the dev_get_platdata() API for all MFD drivers.

   - A removal of non-DT (legacy) support for the twl6040 driver.

   - A few fixes and additions (Mic detect level) to the wm5110 register
     tables.

   - Regmap support for the davinci_voicecodec driver.

   - The usual bunch of minor cleanups and janitorial fixes"

* tag 'mfd-3.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-next: (81 commits)
  mfd: ucb1x00-core: Rewrite ucb1x00_add_dev()
  mfd: ab8500-debugfs: Apply a check for -ENOMEM after allocating memory for event name
  mfd: ab8500-debugfs: Apply a check for -ENOMEM after allocating memory for sysfs
  mfd: timberdale: Use module_pci_driver
  mfd: timberdale: Remove redundant break
  mfd: timberdale: Staticize local variables
  mfd: ab8500-debugfs: Staticize local variables
  mfd: db8500-prcmu: Staticize clk_mgt
  mfd: db8500-prcmu: Use ANSI function declaration
  mfd: omap-usb-host: Staticize usbhs_driver_name
  mfd: 88pm805: Fix potential NULL pdata dereference
  mfd: 88pm800: Fix potential NULL pdata dereference
  mfd: twl6040: Use regmap for register cache
  mfd: davinci_voicecodec: Provide a regmap for register I/O
  mfd: davinci_voicecodec: Remove unused read and write functions
  mmc: memstick: rtsx: Modify copyright comments
  mmc: rtsx: Clear SD_CLK toggle enable bit if switching voltage fail
  mfd: mmc: rtsx: Change default tx phase
  mfd: pcf50633-adc: Use devm_*() functions
  mfd: rtsx: Copyright modifications
  ...
2013-09-07 20:14:19 -07:00

190 lines
4.2 KiB
C

/*
* System Control Driver
*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
* Copyright (C) 2012 Linaro Ltd.
*
* Author: Dong Aisheng <dong.aisheng@linaro.org>
*
* 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.
*/
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
static struct platform_driver syscon_driver;
struct syscon {
struct regmap *regmap;
};
static int syscon_match_node(struct device *dev, void *data)
{
struct device_node *dn = data;
return (dev->of_node == dn) ? 1 : 0;
}
struct regmap *syscon_node_to_regmap(struct device_node *np)
{
struct syscon *syscon;
struct device *dev;
dev = driver_find_device(&syscon_driver.driver, NULL, np,
syscon_match_node);
if (!dev)
return ERR_PTR(-EPROBE_DEFER);
syscon = dev_get_drvdata(dev);
return syscon->regmap;
}
EXPORT_SYMBOL_GPL(syscon_node_to_regmap);
struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
{
struct device_node *syscon_np;
struct regmap *regmap;
syscon_np = of_find_compatible_node(NULL, NULL, s);
if (!syscon_np)
return ERR_PTR(-ENODEV);
regmap = syscon_node_to_regmap(syscon_np);
of_node_put(syscon_np);
return regmap;
}
EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_compatible);
static int syscon_match_pdevname(struct device *dev, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
const struct platform_device_id *id = platform_get_device_id(pdev);
if (id)
if (!strcmp(id->name, (const char *)data))
return 1;
return !strcmp(dev_name(dev), (const char *)data);
}
struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
{
struct device *dev;
struct syscon *syscon;
dev = driver_find_device(&syscon_driver.driver, NULL, (void *)s,
syscon_match_pdevname);
if (!dev)
return ERR_PTR(-EPROBE_DEFER);
syscon = dev_get_drvdata(dev);
return syscon->regmap;
}
EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_pdevname);
struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
const char *property)
{
struct device_node *syscon_np;
struct regmap *regmap;
syscon_np = of_parse_phandle(np, property, 0);
if (!syscon_np)
return ERR_PTR(-ENODEV);
regmap = syscon_node_to_regmap(syscon_np);
of_node_put(syscon_np);
return regmap;
}
EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_phandle);
static const struct of_device_id of_syscon_match[] = {
{ .compatible = "syscon", },
{ },
};
static struct regmap_config syscon_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
static int syscon_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct syscon *syscon;
struct resource *res;
void __iomem *base;
syscon = devm_kzalloc(dev, sizeof(*syscon), GFP_KERNEL);
if (!syscon)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOENT;
base = devm_ioremap(dev, res->start, resource_size(res));
if (!base)
return -ENOMEM;
syscon_regmap_config.max_register = res->end - res->start - 3;
syscon->regmap = devm_regmap_init_mmio(dev, base,
&syscon_regmap_config);
if (IS_ERR(syscon->regmap)) {
dev_err(dev, "regmap init failed\n");
return PTR_ERR(syscon->regmap);
}
platform_set_drvdata(pdev, syscon);
dev_info(dev, "regmap %pR registered\n", res);
return 0;
}
static const struct platform_device_id syscon_ids[] = {
{ "syscon", },
{ }
};
static struct platform_driver syscon_driver = {
.driver = {
.name = "syscon",
.owner = THIS_MODULE,
.of_match_table = of_syscon_match,
},
.probe = syscon_probe,
.id_table = syscon_ids,
};
static int __init syscon_init(void)
{
return platform_driver_register(&syscon_driver);
}
postcore_initcall(syscon_init);
static void __exit syscon_exit(void)
{
platform_driver_unregister(&syscon_driver);
}
module_exit(syscon_exit);
MODULE_AUTHOR("Dong Aisheng <dong.aisheng@linaro.org>");
MODULE_DESCRIPTION("System Control driver");
MODULE_LICENSE("GPL v2");