Commit 6f0e8171 authored by Shengjiu Wang's avatar Shengjiu Wang Committed by Abel Vesa
Browse files

clk: imx: clk-audiomix: Add reset controller 



Audiomix block control can be a reset controller for
Enhanced Audio Return Channel (EARC), which is one of
modules in this audiomix subsystem.

The reset controller is supported by the auxiliary device
framework.

Signed-off-by: default avatarShengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Reviewed-by: default avatarMarco Felsch <m.felsch@pengutronix.de>
Link: https://lore.kernel.org/r/1718350923-21392-3-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: default avatarAbel Vesa <abel.vesa@linaro.org>
parent d7d9ef1f

drivers/clk/imx/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ config CLK_IMX8MP 
	tristate "IMX8MP CCM Clock Driver"

	depends on ARCH_MXC || COMPILE_TEST

	select MXC_CLK

	select AUXILIARY_BUS if RESET_CONTROLLER

	help

	    Build the driver for i.MX8MP CCM Clock Driver

drivers/clk/imx/clk-imx8mp-audiomix.c

+63 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
 * Copyright (C) 2022 Marek Vasut <marex@denx.de>

 */



#include <linux/auxiliary_bus.h>

#include <linux/clk-provider.h>

#include <linux/device.h>

#include <linux/io.h>
@@ -13,6 +14,7 @@ 
#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/slab.h>



#include <dt-bindings/clock/imx8mp-clock.h>
@@ -217,6 +219,63 @@ struct clk_imx8mp_audiomix_priv { 
	struct clk_hw_onecell_data clk_data;

};



#if IS_ENABLED(CONFIG_RESET_CONTROLLER)



static void clk_imx8mp_audiomix_reset_unregister_adev(void *_adev)

{

	struct auxiliary_device *adev = _adev;



	auxiliary_device_delete(adev);

	auxiliary_device_uninit(adev);

}



static void clk_imx8mp_audiomix_reset_adev_release(struct device *dev)

{

	struct auxiliary_device *adev = to_auxiliary_dev(dev);



	kfree(adev);

}



static int clk_imx8mp_audiomix_reset_controller_register(struct device *dev,

							 struct clk_imx8mp_audiomix_priv *priv)

{

	struct auxiliary_device *adev __free(kfree) = NULL;

	int ret;



	if (!of_property_present(dev->of_node, "#reset-cells"))

		return 0;



	adev = kzalloc(sizeof(*adev), GFP_KERNEL);

	if (!adev)

		return -ENOMEM;



	adev->name = "reset";

	adev->dev.parent = dev;

	adev->dev.release = clk_imx8mp_audiomix_reset_adev_release;



	ret = auxiliary_device_init(adev);

	if (ret)

		return ret;



	ret = auxiliary_device_add(adev);

	if (ret) {

		auxiliary_device_uninit(adev);

		return ret;

	}



	return devm_add_action_or_reset(dev, clk_imx8mp_audiomix_reset_unregister_adev,

					no_free_ptr(adev));

}



#else /* !CONFIG_RESET_CONTROLLER */



static int clk_imx8mp_audiomix_reset_controller_register(struct clk_imx8mp_audiomix_priv *priv)

{

	return 0;

}



#endif /* !CONFIG_RESET_CONTROLLER */



static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save)

{

	struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev);
@@ -337,6 +396,10 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) 
	if (ret)

		goto err_clk_register;



	ret = clk_imx8mp_audiomix_reset_controller_register(dev, priv);

	if (ret)

		goto err_clk_register;



	pm_runtime_put_sync(dev);

	return 0;