mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-29 23:53:32 +00:00
b22f315249
Since commit 8b41fc4454 ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.
So remove it in the files in this commit, none of which can be built as
modules.
Signed-off-by: Nick Alcock <nick.alcock@oracle.com>
Suggested-by: Luis Chamberlain <mcgrof@kernel.org>
Signed-off-by: Lee Jones <lee@kernel.org>
288 lines
6.7 KiB
C
288 lines
6.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* MFD driver for twl4030 audio submodule, which contains an audio codec, and
|
|
* the vibra control.
|
|
*
|
|
* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
|
|
*
|
|
* Copyright: (C) 2009 Nokia Corporation
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/mfd/twl.h>
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/twl4030-audio.h>
|
|
|
|
#define TWL4030_AUDIO_CELLS 2
|
|
|
|
static struct platform_device *twl4030_audio_dev;
|
|
|
|
struct twl4030_audio_resource {
|
|
int request_count;
|
|
u8 reg;
|
|
u8 mask;
|
|
};
|
|
|
|
struct twl4030_audio {
|
|
unsigned int audio_mclk;
|
|
struct mutex mutex;
|
|
struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];
|
|
struct mfd_cell cells[TWL4030_AUDIO_CELLS];
|
|
};
|
|
|
|
/*
|
|
* Modify the resource, the function returns the content of the register
|
|
* after the modification.
|
|
*/
|
|
static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)
|
|
{
|
|
struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
|
|
u8 val;
|
|
|
|
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
|
|
audio->resource[id].reg);
|
|
|
|
if (enable)
|
|
val |= audio->resource[id].mask;
|
|
else
|
|
val &= ~audio->resource[id].mask;
|
|
|
|
twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE,
|
|
val, audio->resource[id].reg);
|
|
|
|
return val;
|
|
}
|
|
|
|
static inline int twl4030_audio_get_resource(enum twl4030_audio_res id)
|
|
{
|
|
struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
|
|
u8 val;
|
|
|
|
twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,
|
|
audio->resource[id].reg);
|
|
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Enable the resource.
|
|
* The function returns with error or the content of the register
|
|
*/
|
|
int twl4030_audio_enable_resource(enum twl4030_audio_res id)
|
|
{
|
|
struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
|
|
int val;
|
|
|
|
if (id >= TWL4030_AUDIO_RES_MAX) {
|
|
dev_err(&twl4030_audio_dev->dev,
|
|
"Invalid resource ID (%u)\n", id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&audio->mutex);
|
|
if (!audio->resource[id].request_count)
|
|
/* Resource was disabled, enable it */
|
|
val = twl4030_audio_set_resource(id, 1);
|
|
else
|
|
val = twl4030_audio_get_resource(id);
|
|
|
|
audio->resource[id].request_count++;
|
|
mutex_unlock(&audio->mutex);
|
|
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL_GPL(twl4030_audio_enable_resource);
|
|
|
|
/*
|
|
* Disable the resource.
|
|
* The function returns with error or the content of the register
|
|
*/
|
|
int twl4030_audio_disable_resource(enum twl4030_audio_res id)
|
|
{
|
|
struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
|
|
int val;
|
|
|
|
if (id >= TWL4030_AUDIO_RES_MAX) {
|
|
dev_err(&twl4030_audio_dev->dev,
|
|
"Invalid resource ID (%u)\n", id);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&audio->mutex);
|
|
if (!audio->resource[id].request_count) {
|
|
dev_err(&twl4030_audio_dev->dev,
|
|
"Resource has been disabled already (%u)\n", id);
|
|
mutex_unlock(&audio->mutex);
|
|
return -EPERM;
|
|
}
|
|
audio->resource[id].request_count--;
|
|
|
|
if (!audio->resource[id].request_count)
|
|
/* Resource can be disabled now */
|
|
val = twl4030_audio_set_resource(id, 0);
|
|
else
|
|
val = twl4030_audio_get_resource(id);
|
|
|
|
mutex_unlock(&audio->mutex);
|
|
|
|
return val;
|
|
}
|
|
EXPORT_SYMBOL_GPL(twl4030_audio_disable_resource);
|
|
|
|
unsigned int twl4030_audio_get_mclk(void)
|
|
{
|
|
struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);
|
|
|
|
return audio->audio_mclk;
|
|
}
|
|
EXPORT_SYMBOL_GPL(twl4030_audio_get_mclk);
|
|
|
|
static bool twl4030_audio_has_codec(struct twl4030_audio_data *pdata,
|
|
struct device_node *parent)
|
|
{
|
|
struct device_node *node;
|
|
|
|
if (pdata && pdata->codec)
|
|
return true;
|
|
|
|
node = of_get_child_by_name(parent, "codec");
|
|
if (node) {
|
|
of_node_put(node);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool twl4030_audio_has_vibra(struct twl4030_audio_data *pdata,
|
|
struct device_node *node)
|
|
{
|
|
int vibra;
|
|
|
|
if (pdata && pdata->vibra)
|
|
return true;
|
|
|
|
if (!of_property_read_u32(node, "ti,enable-vibra", &vibra) && vibra)
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static int twl4030_audio_probe(struct platform_device *pdev)
|
|
{
|
|
struct twl4030_audio *audio;
|
|
struct twl4030_audio_data *pdata = dev_get_platdata(&pdev->dev);
|
|
struct device_node *node = pdev->dev.of_node;
|
|
struct mfd_cell *cell = NULL;
|
|
int ret, childs = 0;
|
|
u8 val;
|
|
|
|
if (!pdata && !node) {
|
|
dev_err(&pdev->dev, "Platform data is missing\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
audio = devm_kzalloc(&pdev->dev, sizeof(struct twl4030_audio),
|
|
GFP_KERNEL);
|
|
if (!audio)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&audio->mutex);
|
|
audio->audio_mclk = twl_get_hfclk_rate();
|
|
|
|
/* Configure APLL_INFREQ and disable APLL if enabled */
|
|
switch (audio->audio_mclk) {
|
|
case 19200000:
|
|
val = TWL4030_APLL_INFREQ_19200KHZ;
|
|
break;
|
|
case 26000000:
|
|
val = TWL4030_APLL_INFREQ_26000KHZ;
|
|
break;
|
|
case 38400000:
|
|
val = TWL4030_APLL_INFREQ_38400KHZ;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "Invalid audio_mclk\n");
|
|
return -EINVAL;
|
|
}
|
|
twl_i2c_write_u8(TWL4030_MODULE_AUDIO_VOICE, val, TWL4030_REG_APLL_CTL);
|
|
|
|
/* Codec power */
|
|
audio->resource[TWL4030_AUDIO_RES_POWER].reg = TWL4030_REG_CODEC_MODE;
|
|
audio->resource[TWL4030_AUDIO_RES_POWER].mask = TWL4030_CODECPDZ;
|
|
|
|
/* PLL */
|
|
audio->resource[TWL4030_AUDIO_RES_APLL].reg = TWL4030_REG_APLL_CTL;
|
|
audio->resource[TWL4030_AUDIO_RES_APLL].mask = TWL4030_APLL_EN;
|
|
|
|
if (twl4030_audio_has_codec(pdata, node)) {
|
|
cell = &audio->cells[childs];
|
|
cell->name = "twl4030-codec";
|
|
if (pdata) {
|
|
cell->platform_data = pdata->codec;
|
|
cell->pdata_size = sizeof(*pdata->codec);
|
|
}
|
|
childs++;
|
|
}
|
|
if (twl4030_audio_has_vibra(pdata, node)) {
|
|
cell = &audio->cells[childs];
|
|
cell->name = "twl4030-vibra";
|
|
if (pdata) {
|
|
cell->platform_data = pdata->vibra;
|
|
cell->pdata_size = sizeof(*pdata->vibra);
|
|
}
|
|
childs++;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, audio);
|
|
twl4030_audio_dev = pdev;
|
|
|
|
if (childs)
|
|
ret = mfd_add_devices(&pdev->dev, pdev->id, audio->cells,
|
|
childs, NULL, 0, NULL);
|
|
else {
|
|
dev_err(&pdev->dev, "No platform data found for childs\n");
|
|
ret = -ENODEV;
|
|
}
|
|
|
|
if (ret)
|
|
twl4030_audio_dev = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int twl4030_audio_remove(struct platform_device *pdev)
|
|
{
|
|
mfd_remove_devices(&pdev->dev);
|
|
twl4030_audio_dev = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id twl4030_audio_of_match[] = {
|
|
{.compatible = "ti,twl4030-audio", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, twl4030_audio_of_match);
|
|
|
|
static struct platform_driver twl4030_audio_driver = {
|
|
.driver = {
|
|
.name = "twl4030-audio",
|
|
.of_match_table = twl4030_audio_of_match,
|
|
},
|
|
.probe = twl4030_audio_probe,
|
|
.remove = twl4030_audio_remove,
|
|
};
|
|
|
|
module_platform_driver(twl4030_audio_driver);
|
|
|
|
MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
|
|
MODULE_DESCRIPTION("TWL4030 audio block MFD driver");
|
|
MODULE_ALIAS("platform:twl4030-audio");
|