Merge tag 'reset-for-v6.14-2' of git://git.pengutronix.de/pza/linux into soc/drivers

Reset controller updates for v6.14 (v2)

* Add support for A1 SoC in amlogic reset driver.
* Drop aux registration helper from amlogic reset driver.

* tag 'reset-for-v6.14-2' of git://git.pengutronix.de/pza/linux:
  reset: amlogic: aux: drop aux registration helper
  reset: amlogic: aux: get regmap through parent device
  reset: amlogic: add support for A1 SoC in auxiliary reset driver
  dt-bindings: reset: add bindings for A1 SoC audio reset controller
  clk: amlogic: axg-audio: revert reset implementation
  Revert "clk: Fix invalid execution of clk_set_rate"

Link: https://lore.kernel.org/r/20250115170247.1303656-1-p.zabel@pengutronix.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

6 files changed, 159 insertions, 110 deletions

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index bdc6e5b90da5..9b45fa005030 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -2530,7 +2530,7 @@ static int clk_core_set_rate_nolock(struct clk_core *core,
 	rate = clk_core_req_round_rate_nolock(core, req_rate);
 
 	/* bail early if nothing to do */
-	if (rate == clk_core_get_rate_recalc(core))
+	if (rate == clk_core_get_rate_nolock(core))
 		return 0;
 
 	/* fail on a direct rate set of a protected provider */
diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index febb5d7348ff..be2e3a5f8336 100644
--- a/drivers/clk/meson/Kconfig
+++ b/drivers/clk/meson/Kconfig
@@ -106,7 +106,7 @@ config COMMON_CLK_AXG_AUDIO
 	select COMMON_CLK_MESON_SCLK_DIV
 	select COMMON_CLK_MESON_CLKC_UTILS
 	select REGMAP_MMIO
-	depends on RESET_MESON_AUX
+	select RESET_CONTROLLER
 	help
 	  Support for the audio clock controller on AmLogic A113D devices,
 	  aka axg, Say Y if you want audio subsystem to work.
diff --git a/drivers/clk/meson/axg-audio.c b/drivers/clk/meson/axg-audio.c
index 7a3460804424..9df627b142f8 100644
--- a/drivers/clk/meson/axg-audio.c
+++ b/drivers/clk/meson/axg-audio.c
@@ -15,8 +15,6 @@
 #include <linux/reset-controller.h>
 #include <linux/slab.h>
 
-#include <soc/amlogic/reset-meson-aux.h>
-
 #include "meson-clkc-utils.h"
 #include "axg-audio.h"
 #include "clk-regmap.h"
@@ -1680,6 +1678,84 @@ static struct clk_regmap *const sm1_clk_regmaps[] = {
 	&sm1_earcrx_dmac_clk,
 };
 
+struct axg_audio_reset_data {
+	struct reset_controller_dev rstc;
+	struct regmap *map;
+	unsigned int offset;
+};
+
+static void axg_audio_reset_reg_and_bit(struct axg_audio_reset_data *rst,
+					unsigned long id,
+					unsigned int *reg,
+					unsigned int *bit)
+{
+	unsigned int stride = regmap_get_reg_stride(rst->map);
+
+	*reg = (id / (stride * BITS_PER_BYTE)) * stride;
+	*reg += rst->offset;
+	*bit = id % (stride * BITS_PER_BYTE);
+}
+
+static int axg_audio_reset_update(struct reset_controller_dev *rcdev,
+				unsigned long id, bool assert)
+{
+	struct axg_audio_reset_data *rst =
+		container_of(rcdev, struct axg_audio_reset_data, rstc);
+	unsigned int offset, bit;
+
+	axg_audio_reset_reg_and_bit(rst, id, &offset, &bit);
+
+	regmap_update_bits(rst->map, offset, BIT(bit),
+			assert ? BIT(bit) : 0);
+
+	return 0;
+}
+
+static int axg_audio_reset_status(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	struct axg_audio_reset_data *rst =
+		container_of(rcdev, struct axg_audio_reset_data, rstc);
+	unsigned int val, offset, bit;
+
+	axg_audio_reset_reg_and_bit(rst, id, &offset, &bit);
+
+	regmap_read(rst->map, offset, &val);
+
+	return !!(val & BIT(bit));
+}
+
+static int axg_audio_reset_assert(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	return axg_audio_reset_update(rcdev, id, true);
+}
+
+static int axg_audio_reset_deassert(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	return axg_audio_reset_update(rcdev, id, false);
+}
+
+static int axg_audio_reset_toggle(struct reset_controller_dev *rcdev,
+				unsigned long id)
+{
+	int ret;
+
+	ret = axg_audio_reset_assert(rcdev, id);
+	if (ret)
+		return ret;
+
+	return axg_audio_reset_deassert(rcdev, id);
+}
+
+static const struct reset_control_ops axg_audio_rstc_ops = {
+	.assert = axg_audio_reset_assert,
+	.deassert = axg_audio_reset_deassert,
+	.reset = axg_audio_reset_toggle,
+	.status = axg_audio_reset_status,
+};
+
 static struct regmap_config axg_audio_regmap_cfg = {
 	.reg_bits	= 32,
 	.val_bits	= 32,
@@ -1690,14 +1766,16 @@ struct audioclk_data {
 	struct clk_regmap *const *regmap_clks;
 	unsigned int regmap_clk_num;
 	struct meson_clk_hw_data hw_clks;
+	unsigned int reset_offset;
+	unsigned int reset_num;
 	unsigned int max_register;
-	const char *rst_drvname;
 };
 
 static int axg_audio_clkc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	const struct audioclk_data *data;
+	struct axg_audio_reset_data *rst;
 	struct regmap *map;
 	void __iomem *regs;
 	struct clk_hw *hw;
@@ -1756,11 +1834,22 @@ static int axg_audio_clkc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	/* Register auxiliary reset driver when applicable */
-	if (data->rst_drvname)
-		ret = devm_meson_rst_aux_register(dev, map, data->rst_drvname);
+	/* Stop here if there is no reset */
+	if (!data->reset_num)
+		return 0;
+
+	rst = devm_kzalloc(dev, sizeof(*rst), GFP_KERNEL);
+	if (!rst)
+		return -ENOMEM;
+
+	rst->map = map;
+	rst->offset = data->reset_offset;
+	rst->rstc.nr_resets = data->reset_num;
+	rst->rstc.ops = &axg_audio_rstc_ops;
+	rst->rstc.of_node = dev->of_node;
+	rst->rstc.owner = THIS_MODULE;
 
-	return ret;
+	return devm_reset_controller_register(dev, &rst->rstc);
 }
 
 static const struct audioclk_data axg_audioclk_data = {
@@ -1780,8 +1869,9 @@ static const struct audioclk_data g12a_audioclk_data = {
 		.hws = g12a_audio_hw_clks,
 		.num = ARRAY_SIZE(g12a_audio_hw_clks),
 	},
+	.reset_offset = AUDIO_SW_RESET,
+	.reset_num = 26,
 	.max_register = AUDIO_CLK_SPDIFOUT_B_CTRL,
-	.rst_drvname = "rst-g12a",
 };
 
 static const struct audioclk_data sm1_audioclk_data = {
@@ -1791,8 +1881,9 @@ static const struct audioclk_data sm1_audioclk_data = {
 		.hws = sm1_audio_hw_clks,
 		.num = ARRAY_SIZE(sm1_audio_hw_clks),
 	},
+	.reset_offset = AUDIO_SM1_SW_RESET0,
+	.reset_num = 39,
 	.max_register = AUDIO_EARCRX_DMAC_CLK_CTRL,
-	.rst_drvname = "rst-sm1",
 };
 
 static const struct of_device_id clkc_match_table[] = {
diff --git a/drivers/reset/amlogic/reset-meson-aux.c b/drivers/reset/amlogic/reset-meson-aux.c
index 61ce515d92a2..33c06013439e 100644
--- a/drivers/reset/amlogic/reset-meson-aux.c
+++ b/drivers/reset/amlogic/reset-meson-aux.c
@@ -11,20 +11,20 @@
 #include <linux/auxiliary_bus.h>
 #include <linux/regmap.h>
 #include <linux/reset-controller.h>
-#include <linux/slab.h>
 
 #include "reset-meson.h"
-#include <soc/amlogic/reset-meson-aux.h>
 
-static DEFINE_IDA(meson_rst_aux_ida);
-
-struct meson_reset_adev {
-	struct auxiliary_device adev;
-	struct regmap *map;
+static const struct meson_reset_param meson_a1_audio_param = {
+	.reset_ops	= &meson_reset_toggle_ops,
+	.reset_num	= 32,
+	.level_offset	= 0x28,
 };
 
-#define to_meson_reset_adev(_adev) \
-	container_of((_adev), struct meson_reset_adev, adev)
+static const struct meson_reset_param meson_a1_audio_vad_param = {
+	.reset_ops	= &meson_reset_toggle_ops,
+	.reset_num	= 6,
+	.level_offset	= 0x8,
+};
 
 static const struct meson_reset_param meson_g12a_audio_param = {
 	.reset_ops	= &meson_reset_toggle_ops,
@@ -40,6 +40,12 @@ static const struct meson_reset_param meson_sm1_audio_param = {
 
 static const struct auxiliary_device_id meson_reset_aux_ids[] = {
 	{
+		.name = "a1-audio-clkc.rst-a1",
+		.driver_data = (kernel_ulong_t)&meson_a1_audio_param,
+	}, {
+		.name = "a1-audio-clkc.rst-a1-vad",
+		.driver_data = (kernel_ulong_t)&meson_a1_audio_vad_param,
+	}, {
 		.name = "axg-audio-clkc.rst-g12a",
 		.driver_data = (kernel_ulong_t)&meson_g12a_audio_param,
 	}, {
@@ -54,10 +60,13 @@ static int meson_reset_aux_probe(struct auxiliary_device *adev,
 {
 	const struct meson_reset_param *param =
 		(const struct meson_reset_param *)(id->driver_data);
-	struct meson_reset_adev *raux =
-		to_meson_reset_adev(adev);
+	struct regmap *map;
+
+	map = dev_get_regmap(adev->dev.parent, NULL);
+	if (!map)
+		return -EINVAL;
 
-	return meson_reset_controller_register(&adev->dev, raux->map, param);
+	return meson_reset_controller_register(&adev->dev, map, param);
 }
 
 static struct auxiliary_driver meson_reset_aux_driver = {
@@ -66,70 +75,6 @@ static struct auxiliary_driver meson_reset_aux_driver = {
 };
 module_auxiliary_driver(meson_reset_aux_driver);
 
-static void meson_rst_aux_release(struct device *dev)
-{
-	struct auxiliary_device *adev = to_auxiliary_dev(dev);
-	struct meson_reset_adev *raux =
-		to_meson_reset_adev(adev);
-
-	ida_free(&meson_rst_aux_ida, adev->id);
-	kfree(raux);
-}
-
-static void meson_rst_aux_unregister_adev(void *_adev)
-{
-	struct auxiliary_device *adev = _adev;
-
-	auxiliary_device_delete(adev);
-	auxiliary_device_uninit(adev);
-}
-
-int devm_meson_rst_aux_register(struct device *dev,
-				struct regmap *map,
-				const char *adev_name)
-{
-	struct meson_reset_adev *raux;
-	struct auxiliary_device *adev;
-	int ret;
-
-	raux = kzalloc(sizeof(*raux), GFP_KERNEL);
-	if (!raux)
-		return -ENOMEM;
-
-	ret = ida_alloc(&meson_rst_aux_ida, GFP_KERNEL);
-	if (ret < 0)
-		goto raux_free;
-
-	raux->map = map;
-
-	adev = &raux->adev;
-	adev->id = ret;
-	adev->name = adev_name;
-	adev->dev.parent = dev;
-	adev->dev.release = meson_rst_aux_release;
-	device_set_of_node_from_dev(&adev->dev, dev);
-
-	ret = auxiliary_device_init(adev);
-	if (ret)
-		goto ida_free;
-
-	ret = __auxiliary_device_add(adev, dev->driver->name);
-	if (ret) {
-		auxiliary_device_uninit(adev);
-		return ret;
-	}
-
-	return devm_add_action_or_reset(dev, meson_rst_aux_unregister_adev,
-					adev);
-
-ida_free:
-	ida_free(&meson_rst_aux_ida, adev->id);
-raux_free:
-	kfree(raux);
-	return ret;
-}
-EXPORT_SYMBOL_GPL(devm_meson_rst_aux_register);
-
 MODULE_DESCRIPTION("Amlogic Meson Reset Auxiliary driver");
 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/include/dt-bindings/reset/amlogic,meson-a1-audio-reset.h b/include/dt-bindings/reset/amlogic,meson-a1-audio-reset.h
new file mode 100644
index 000000000000..7693552f1507
--- /dev/null
+++ b/include/dt-bindings/reset/amlogic,meson-a1-audio-reset.h
@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/*
+ * Copyright (c) 2024, SaluteDevices. All Rights Reserved.
+ *
+ * Author: Jan Dakinevich <jan.dakinevich@salutedevices.com>
+ */
+
+#ifndef _DT_BINDINGS_AMLOGIC_MESON_A1_AUDIO_RESET_H
+#define _DT_BINDINGS_AMLOGIC_MESON_A1_AUDIO_RESET_H
+
+#define AUD_RESET_DDRARB	0
+#define AUD_RESET_TDMIN_A	1
+#define AUD_RESET_TDMIN_B	2
+#define AUD_RESET_TDMIN_LB	3
+#define AUD_RESET_LOOPBACK	4
+#define AUD_RESET_TDMOUT_A	5
+#define AUD_RESET_TDMOUT_B	6
+#define AUD_RESET_FRDDR_A	7
+#define AUD_RESET_FRDDR_B	8
+#define AUD_RESET_TODDR_A	9
+#define AUD_RESET_TODDR_B	10
+#define AUD_RESET_SPDIFIN	11
+#define AUD_RESET_RESAMPLE	12
+#define AUD_RESET_EQDRC		13
+#define AUD_RESET_LOCKER	14
+#define AUD_RESET_TOACODEC	30
+#define AUD_RESET_CLKTREE	31
+
+#define AUD_VAD_RESET_DDRARB	0
+#define AUD_VAD_RESET_PDM	1
+#define AUD_VAD_RESET_TDMIN_VAD	2
+#define AUD_VAD_RESET_TODDR_VAD	3
+#define AUD_VAD_RESET_TOVAD	4
+#define AUD_VAD_RESET_CLKTREE	5
+
+#endif /* _DT_BINDINGS_AMLOGIC_MESON_A1_AUDIO_RESET_H */
diff --git a/include/soc/amlogic/reset-meson-aux.h b/include/soc/amlogic/reset-meson-aux.h
deleted file mode 100644
index d8a15d48c984..000000000000
--- a/include/soc/amlogic/reset-meson-aux.h
+++ /dev/null
@@ -1,23 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __SOC_RESET_MESON_AUX_H
-#define __SOC_RESET_MESON_AUX_H
-
-#include <linux/err.h>
-
-struct device;
-struct regmap;
-
-#if IS_ENABLED(CONFIG_RESET_MESON_AUX)
-int devm_meson_rst_aux_register(struct device *dev,
-				struct regmap *map,
-				const char *adev_name);
-#else
-static inline int devm_meson_rst_aux_register(struct device *dev,
-					      struct regmap *map,
-					      const char *adev_name)
-{
-	return 0;
-}
-#endif
-
-#endif /* __SOC_RESET_MESON_AUX_H */