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Message-Id: <1717036278-3515-3-git-send-email-shengjiu.wang@nxp.com>
Date: Thu, 30 May 2024 10:31:15 +0800
From: Shengjiu Wang <shengjiu.wang@....com>
To: p.zabel@...gutronix.de,
abelvesa@...nel.org,
peng.fan@....com,
mturquette@...libre.com,
sboyd@...nel.org,
robh@...nel.org,
krzk+dt@...nel.org,
conor+dt@...nel.org,
shawnguo@...nel.org,
s.hauer@...gutronix.de,
kernel@...gutronix.de,
festevam@...il.com,
marex@...x.de,
linux-clk@...r.kernel.org,
imx@...ts.linux.dev,
devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
shengjiu.wang@...il.com
Subject: [PATCH v6 2/5] 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: Shengjiu Wang <shengjiu.wang@....com>
Reviewed-by: Frank Li <Frank.Li@....com>
---
drivers/clk/imx/Kconfig | 1 +
drivers/clk/imx/clk-imx8mp-audiomix.c | 60 +++++++++++++++++++++++++++
2 files changed, 61 insertions(+)
diff --git a/drivers/clk/imx/Kconfig b/drivers/clk/imx/Kconfig
index 6da0fba68225..9edfb030bea9 100644
--- a/drivers/clk/imx/Kconfig
+++ b/drivers/clk/imx/Kconfig
@@ -81,6 +81,7 @@ config CLK_IMX8MP
tristate "IMX8MP CCM Clock Driver"
depends on ARCH_MXC || COMPILE_TEST
select MXC_CLK
+ select AUXILIARY_BUS
help
Build the driver for i.MX8MP CCM Clock Driver
diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
index b381d6f784c8..a3dc2f3606ee 100644
--- a/drivers/clk/imx/clk-imx8mp-audiomix.c
+++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
@@ -5,6 +5,7 @@
* Copyright (C) 2022 Marek Vasut <marex@...x.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 +219,60 @@ 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;
+
+ 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 +393,10 @@ 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;
--
2.34.1
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