[PATCH v4 8/8] clk: amlogic: axg-audio: use the auxiliary reset driver - take 2

[Jerome Brunet <jbrunet@baylibre.com>]

Remove the implementation of the reset driver in axg audio
clock driver and migrate to the one provided by reset framework
on the auxiliary bus.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 drivers/clk/meson/Kconfig     |   2 +-
 drivers/clk/meson/axg-audio.c | 114 +++++-------------------------------------
 2 files changed, 14 insertions(+), 102 deletions(-)

diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
index be2e3a5f83363b07cdcec2601acf15780ff24892..7cb21fc223b063cb93812643f02f192343981ed8 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
-	select RESET_CONTROLLER
+	imply RESET_MESON_AUX
 	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 9df627b142f89788966ede0262aaaf39e13f0b49..3948f5d0faca372dd5cc4ed6dc95f9c89fe5bae8 100644
--- a/drivers/clk/meson/axg-audio.c
+++ b/drivers/clk/meson/axg-audio.c
@@ -4,6 +4,7 @@
  * Author: Jerome Brunet <jbrunet@baylibre.com>
  */
 
+#include <linux/auxiliary_bus.h>
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/init.h>
@@ -12,7 +13,6 @@
 #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"
@@ -1678,84 +1678,6 @@ 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,
@@ -1766,8 +1688,7 @@ 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;
+	const char *rst_drvname;
 	unsigned int max_register;
 };
 
@@ -1775,7 +1696,7 @@ 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 auxiliary_device *auxdev;
 	struct regmap *map;
 	void __iomem *regs;
 	struct clk_hw *hw;
@@ -1834,22 +1755,15 @@ static int axg_audio_clkc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	/* 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;
+	/* Register auxiliary reset driver when applicable */
+	if (data->rst_drvname) {
+		auxdev = __devm_auxiliary_device_create(dev, dev->driver->name,
+							data->rst_drvname, NULL, 0);
+		if (!auxdev)
+			return -ENODEV;
+	}
 
-	return devm_reset_controller_register(dev, &rst->rstc);
+	return 0;
 }
 
 static const struct audioclk_data axg_audioclk_data = {
@@ -1869,8 +1783,7 @@ 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,
+	.rst_drvname = "rst-g12a",
 	.max_register = AUDIO_CLK_SPDIFOUT_B_CTRL,
 };
 
@@ -1881,8 +1794,7 @@ 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,
+	.rst_drvname = "rst-sm1",
 	.max_register = AUDIO_EARCRX_DMAC_CLK_CTRL,
 };
 

-- 
2.47.2