635eac1e54
Commit a53e35db70 ("reset: Ensure drivers are explicit when requesting
reset lines") started to transition the reset control request API calls
to explicitly state whether the driver needs exclusive or shared reset
control behavior. Convert all drivers requesting exclusive resets to the
explicit API call so the temporary transition helpers can be removed.
No functional changes.
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
|
|
* STM32 ALSA SoC Digital Audio Interface (SAI) driver.
|
|
*
|
|
* Copyright (C) 2016, STMicroelectronics - All Rights Reserved
|
|
* Author(s): Olivier Moysan <olivier.moysan@st.com> for STMicroelectronics.
|
|
*
|
|
* License terms: GPL V2.0.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published by
|
|
* the Free Software Foundation.
|
|
*
|
|
* 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 <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/reset.h>
|
|
|
|
#include <sound/dmaengine_pcm.h>
|
|
#include <sound/core.h>
|
|
|
|
#include "stm32_sai.h"
|
|
|
|
static const struct stm32_sai_conf stm32_sai_conf_f4 = {
|
|
.version = SAI_STM32F4,
|
|
};
|
|
|
|
static const struct stm32_sai_conf stm32_sai_conf_h7 = {
|
|
.version = SAI_STM32H7,
|
|
};
|
|
|
|
static const struct of_device_id stm32_sai_ids[] = {
|
|
{ .compatible = "st,stm32f4-sai", .data = (void *)&stm32_sai_conf_f4 },
|
|
{ .compatible = "st,stm32h7-sai", .data = (void *)&stm32_sai_conf_h7 },
|
|
{}
|
|
};
|
|
|
|
static int stm32_sai_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct stm32_sai_data *sai;
|
|
struct reset_control *rst;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
const struct of_device_id *of_id;
|
|
|
|
sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
|
|
if (!sai)
|
|
return -ENOMEM;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
of_id = of_match_device(stm32_sai_ids, &pdev->dev);
|
|
if (of_id)
|
|
sai->conf = (struct stm32_sai_conf *)of_id->data;
|
|
else
|
|
return -EINVAL;
|
|
|
|
sai->clk_x8k = devm_clk_get(&pdev->dev, "x8k");
|
|
if (IS_ERR(sai->clk_x8k)) {
|
|
dev_err(&pdev->dev, "missing x8k parent clock\n");
|
|
return PTR_ERR(sai->clk_x8k);
|
|
}
|
|
|
|
sai->clk_x11k = devm_clk_get(&pdev->dev, "x11k");
|
|
if (IS_ERR(sai->clk_x11k)) {
|
|
dev_err(&pdev->dev, "missing x11k parent clock\n");
|
|
return PTR_ERR(sai->clk_x11k);
|
|
}
|
|
|
|
/* init irqs */
|
|
sai->irq = platform_get_irq(pdev, 0);
|
|
if (sai->irq < 0) {
|
|
dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);
|
|
return sai->irq;
|
|
}
|
|
|
|
/* reset */
|
|
rst = reset_control_get_exclusive(&pdev->dev, NULL);
|
|
if (!IS_ERR(rst)) {
|
|
reset_control_assert(rst);
|
|
udelay(2);
|
|
reset_control_deassert(rst);
|
|
}
|
|
|
|
sai->pdev = pdev;
|
|
platform_set_drvdata(pdev, sai);
|
|
|
|
return of_platform_populate(np, NULL, NULL, &pdev->dev);
|
|
}
|
|
|
|
static int stm32_sai_remove(struct platform_device *pdev)
|
|
{
|
|
of_platform_depopulate(&pdev->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
MODULE_DEVICE_TABLE(of, stm32_sai_ids);
|
|
|
|
static struct platform_driver stm32_sai_driver = {
|
|
.driver = {
|
|
.name = "st,stm32-sai",
|
|
.of_match_table = stm32_sai_ids,
|
|
},
|
|
.probe = stm32_sai_probe,
|
|
.remove = stm32_sai_remove,
|
|
};
|
|
|
|
module_platform_driver(stm32_sai_driver);
|
|
|
|
MODULE_DESCRIPTION("STM32 Soc SAI Interface");
|
|
MODULE_AUTHOR("Olivier Moysan <olivier.moysan@st.com>");
|
|
MODULE_ALIAS("platform:st,stm32-sai");
|
|
MODULE_LICENSE("GPL v2");
|