[RFC PATCH v2 1/5] clk: meson: axg: move reset controller's code to separate module

[Jan Dakinevich]

This code will by reused by A1 SoC.

Signed-off-by: Jan Dakinevich <jan.dakinevich@xxxxxxxxxxxxxxxxx>
---
 drivers/clk/meson/Kconfig            |   5 ++
 drivers/clk/meson/Makefile           |   1 +
 drivers/clk/meson/axg-audio.c        |  95 +----------------------
 drivers/clk/meson/meson-audio-rstc.c | 109 +++++++++++++++++++++++++++
 drivers/clk/meson/meson-audio-rstc.h |  12 +++
 5 files changed, 130 insertions(+), 92 deletions(-)
 create mode 100644 drivers/clk/meson/meson-audio-rstc.c
 create mode 100644 drivers/clk/meson/meson-audio-rstc.h

diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index 29ffd14d267b..d6a2fa5f7e88 100644
--- a/drivers/clk/meson/Kconfig
+++ b/drivers/clk/meson/Kconfig
@@ -48,6 +48,10 @@ config COMMON_CLK_MESON_CPU_DYNDIV
 	tristate
 	select COMMON_CLK_MESON_REGMAP
 
+config COMMON_CLK_MESON_AUDIO_RSTC
+	tristate
+	select RESET_CONTROLLER
+
 config COMMON_CLK_MESON8B
 	bool "Meson8 SoC Clock controller support"
 	depends on ARM
@@ -101,6 +105,7 @@ config COMMON_CLK_AXG_AUDIO
 	select COMMON_CLK_MESON_PHASE
 	select COMMON_CLK_MESON_SCLK_DIV
 	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_AUDIO_RSTC
 	select REGMAP_MMIO
 	help
 	  Support for the audio clock controller on AmLogic A113D devices,
diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile
index 9ee4b954c896..88d94921a4dc 100644
--- a/drivers/clk/meson/Makefile
+++ b/drivers/clk/meson/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_COMMON_CLK_MESON_PLL) += clk-pll.o
 obj-$(CONFIG_COMMON_CLK_MESON_REGMAP) += clk-regmap.o
 obj-$(CONFIG_COMMON_CLK_MESON_SCLK_DIV) += sclk-div.o
 obj-$(CONFIG_COMMON_CLK_MESON_VID_PLL_DIV) += vid-pll-div.o
+obj-$(CONFIG_COMMON_CLK_MESON_AUDIO_RSTC) += meson-audio-rstc.o
 
 # Amlogic Clock controllers
 
diff --git a/drivers/clk/meson/axg-audio.c b/drivers/clk/meson/axg-audio.c
index ac3482960903..990203a7ad5c 100644
--- a/drivers/clk/meson/axg-audio.c
+++ b/drivers/clk/meson/axg-audio.c
@@ -12,10 +12,10 @@
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
-#include <linux/reset-controller.h>
 #include <linux/slab.h>
 
 #include "meson-clkc-utils.h"
+#include "meson-audio-rstc.h"
 #include "axg-audio.h"
 #include "clk-regmap.h"
 #include "clk-phase.h"
@@ -1648,84 +1648,6 @@ static struct clk_regmap *const sm1_clk_regmaps[] = {
 	&sm1_sysclk_b_en,
 };
 
-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 const struct regmap_config axg_audio_regmap_cfg = {
 	.reg_bits	= 32,
 	.val_bits	= 32,
@@ -1745,7 +1667,6 @@ 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;
@@ -1807,18 +1728,8 @@ static int axg_audio_clkc_probe(struct platform_device *pdev)
 	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 devm_reset_controller_register(dev, &rst->rstc);
+	return meson_audio_rstc_register(dev, map, data->reset_offset,
+					 data->reset_num);
 }
 
 static const struct audioclk_data axg_audioclk_data = {
diff --git a/drivers/clk/meson/meson-audio-rstc.c b/drivers/clk/meson/meson-audio-rstc.c
new file mode 100644
index 000000000000..2079d24c40f4
--- /dev/null
+++ b/drivers/clk/meson/meson-audio-rstc.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2018 BayLibre, SAS.
+ * Author: Jerome Brunet <jbrunet@xxxxxxxxxxxx>
+ */
+
+#include <linux/reset-controller.h>
+
+#include "meson-audio-rstc.h"
+
+struct meson_audio_reset_data {
+	struct reset_controller_dev rstc;
+	struct regmap *map;
+	unsigned int offset;
+};
+
+static void meson_audio_reset_reg_and_bit(struct meson_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 meson_audio_reset_update(struct reset_controller_dev *rcdev,
+				    unsigned long id, bool assert)
+{
+	struct meson_audio_reset_data *rst =
+		container_of(rcdev, struct meson_audio_reset_data, rstc);
+	unsigned int offset, bit;
+
+	meson_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 meson_audio_reset_status(struct reset_controller_dev *rcdev,
+				    unsigned long id)
+{
+	struct meson_audio_reset_data *rst =
+		container_of(rcdev, struct meson_audio_reset_data, rstc);
+	unsigned int val, offset, bit;
+
+	meson_audio_reset_reg_and_bit(rst, id, &offset, &bit);
+
+	regmap_read(rst->map, offset, &val);
+
+	return !!(val & BIT(bit));
+}
+
+static int meson_audio_reset_assert(struct reset_controller_dev *rcdev,
+				    unsigned long id)
+{
+	return meson_audio_reset_update(rcdev, id, true);
+}
+
+static int meson_audio_reset_deassert(struct reset_controller_dev *rcdev,
+				      unsigned long id)
+{
+	return meson_audio_reset_update(rcdev, id, false);
+}
+
+static int meson_audio_reset_toggle(struct reset_controller_dev *rcdev,
+				    unsigned long id)
+{
+	int ret;
+
+	ret = meson_audio_reset_assert(rcdev, id);
+	if (ret)
+		return ret;
+
+	return meson_audio_reset_deassert(rcdev, id);
+}
+
+static const struct reset_control_ops meson_audio_rstc_ops = {
+	.assert = meson_audio_reset_assert,
+	.deassert = meson_audio_reset_deassert,
+	.reset = meson_audio_reset_toggle,
+	.status = meson_audio_reset_status,
+};
+
+int meson_audio_rstc_register(struct device *dev, struct regmap *map,
+			      unsigned int offset, unsigned int num)
+{
+	struct meson_audio_reset_data *rst;
+
+	rst = devm_kzalloc(dev, sizeof(*rst), GFP_KERNEL);
+	if (!rst)
+		return -ENOMEM;
+
+	rst->map = map;
+	rst->offset = offset;
+	rst->rstc.nr_resets = num;
+	rst->rstc.ops = &meson_audio_rstc_ops;
+	rst->rstc.of_node = dev->of_node;
+	rst->rstc.owner = THIS_MODULE;
+
+	return devm_reset_controller_register(dev, &rst->rstc);
+}
+EXPORT_SYMBOL_GPL(meson_audio_rstc_register);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/clk/meson/meson-audio-rstc.h b/drivers/clk/meson/meson-audio-rstc.h
new file mode 100644
index 000000000000..6b441549de03
--- /dev/null
+++ b/drivers/clk/meson/meson-audio-rstc.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+
+#ifndef __MESON_AUDIO_RSTC_H
+#define __MESON_AUDIO_RSTC_H
+
+#include <linux/device.h>
+#include <linux/regmap.h>
+
+int meson_audio_rstc_register(struct device *dev, struct regmap *map,
+			      unsigned int offset, unsigned int num);
+
+#endif /* __MESON_AUDIO_RSTC_H */
-- 
2.34.1