Merge tag 'clk-meson-v6.13-1' of https://github.com/BayLibre/clk-meson into clk-amlogic

Pull Amlogic clk driver updates from Jerome Brunet:

 - Fix hifi_pll rate calculation on Amlogic s4 and c3
 - Move audio reset implementation from the Amlogic axg-audio clock
   controller driver to the reset directory, using the auxiliary device
   bus
 - Remove the unnecessary spinlock in the Amlogic mpll driver
 - Fix Amlogic meson8 clock controller DT bindings

* tag 'clk-meson-v6.13-1' of https://github.com/BayLibre/clk-meson:
  clk: amlogic: axg-audio: use the auxiliary reset driver
  reset: amlogic: Fix small whitespace issue
  reset: amlogic: add auxiliary reset driver support
  reset: amlogic: split the device core and platform probe
  reset: amlogic: move drivers to a dedicated directory
  reset: amlogic: add reset status support
  reset: amlogic: use reset number instead of register count
  reset: amlogic: add driver parameters
  reset: amlogic: make parameters unsigned
  reset: amlogic: use generic data matching function
  reset: amlogic: convert driver to regmap
  dt-bindings: clock: convert amlogic,meson8b-clkc.txt to dtschema
  clk: meson: meson8b: remove spinlock
  clk: meson: mpll: Delete a useless spinlock from the MPLL
  clk: meson: s4: pll: fix frac maximum value for hifi_pll
  clk: meson: c3: pll: fix frac maximum value for hifi_pll
  clk: meson: Support PLL with fixed fractional denominators
  clk: meson: s4: pll: hifi_pll support fractional multiplier

Author: bebarino

Documentation/devicetree/bindings/clock/amlogic,meson8-clkc.yaml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/amlogic,meson8-clkc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Meson8, Meson8b and Meson8m2 Clock and Reset Controller
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - amlogic,meson8-clkc
+          - amlogic,meson8b-clkc
+      - items:
+          - const: amlogic,meson8m2-clkc
+          - const: amlogic,meson8-clkc
+
+  clocks:
+    minItems: 2
+    maxItems: 3
+
+  clock-names:
+    minItems: 2
+    items:
+      - const: xtal
+      - const: ddr_pll
+      - const: clk_32k
+
+  '#clock-cells':
+    const: 1
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - clocks
+  - clock-names
+  - '#reset-cells'
+
+additionalProperties: false

Documentation/devicetree/bindings/clock/amlogic,meson8b-clkc.txt

@@ -106,6 +106,7 @@ config COMMON_CLK_AXG_AUDIO
 	select COMMON_CLK_MESON_SCLK_DIV
 	select COMMON_CLK_MESON_CLKC_UTILS
 	select REGMAP_MMIO
+	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.

drivers/clk/meson/Kconfig

@@ -15,6 +15,8 @@
 #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"
@@ -1678,84 +1680,6 @@ 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,
@@ -1766,16 +1690,14 @@ 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;
@@ -1834,22 +1756,11 @@ 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)
+		ret = devm_meson_rst_aux_register(dev, map, data->rst_drvname);
 
-	return devm_reset_controller_register(dev, &rst->rstc);
+	return ret;
 }
 
 static const struct audioclk_data axg_audioclk_data = {
@@ -1869,9 +1780,8 @@ 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 = {
@@ -1881,9 +1791,8 @@ 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[] = {

drivers/clk/meson/axg-audio.c

@@ -23,8 +23,6 @@
 
 #include <dt-bindings/clock/axg-clkc.h>
 
-static DEFINE_SPINLOCK(meson_clk_lock);
-
 static struct clk_regmap axg_fixed_pll_dco = {
 	.data = &(struct meson_clk_pll_data){
 		.en = {
@@ -506,7 +504,6 @@ static struct clk_regmap axg_mpll0_div = {
 			.shift   = 0,
 			.width	 = 1,
 		},
-		.lock = &meson_clk_lock,
 		.flags = CLK_MESON_MPLL_ROUND_CLOSEST,
 	},
 	.hw.init = &(struct clk_init_data){
@@ -557,7 +554,6 @@ static struct clk_regmap axg_mpll1_div = {
 			.shift   = 1,
 			.width	 = 1,
 		},
-		.lock = &meson_clk_lock,
 		.flags = CLK_MESON_MPLL_ROUND_CLOSEST,
 	},
 	.hw.init = &(struct clk_init_data){
@@ -613,7 +609,6 @@ static struct clk_regmap axg_mpll2_div = {
 			.shift   = 2,
 			.width	 = 1,
 		},
-		.lock = &meson_clk_lock,
 		.flags = CLK_MESON_MPLL_ROUND_CLOSEST,
 	},
 	.hw.init = &(struct clk_init_data){
@@ -664,7 +659,6 @@ static struct clk_regmap axg_mpll3_div = {
 			.shift   = 3,
 			.width	 = 1,
 		},
-		.lock = &meson_clk_lock,
 		.flags = CLK_MESON_MPLL_ROUND_CLOSEST,
 	},
 	.hw.init = &(struct clk_init_data){

drivers/clk/meson/axg.c

@@ -361,6 +361,7 @@ static struct clk_regmap hifi_pll_dco = {
 		.range = &c3_gp0_pll_mult_range,
 		.init_regs = c3_hifi_init_regs,
 		.init_count = ARRAY_SIZE(c3_hifi_init_regs),
+		.frac_max = 100000,
 	},
 	.hw.init = &(struct clk_init_data) {
 		.name = "hifi_pll_dco",

drivers/clk/meson/c3-pll.c

@@ -112,26 +112,15 @@ static int mpll_set_rate(struct clk_hw *hw,
 	struct clk_regmap *clk = to_clk_regmap(hw);
 	struct meson_clk_mpll_data *mpll = meson_clk_mpll_data(clk);
 	unsigned int sdm, n2;
-	unsigned long flags = 0;
 
 	params_from_rate(rate, parent_rate, &sdm, &n2, mpll->flags);
 
-	if (mpll->lock)
-		spin_lock_irqsave(mpll->lock, flags);
-	else
-		__acquire(mpll->lock);
-
 	/* Set the fractional part */
 	meson_parm_write(clk->map, &mpll->sdm, sdm);
 
 	/* Set the integer divider part */
 	meson_parm_write(clk->map, &mpll->n2, n2);
 
-	if (mpll->lock)
-		spin_unlock_irqrestore(mpll->lock, flags);
-	else
-		__release(mpll->lock);
-
 	return 0;
 }
 

drivers/clk/meson/clk-mpll.c

@@ -20,7 +20,6 @@ struct meson_clk_mpll_data {
 	struct parm misc;
 	const struct reg_sequence *init_regs;
 	unsigned int init_count;
-	spinlock_t *lock;
 	u8 flags;
 };
 

drivers/clk/meson/clk-mpll.h

@@ -57,12 +57,13 @@ static unsigned long __pll_params_to_rate(unsigned long parent_rate,
 					  struct meson_clk_pll_data *pll)
 {
 	u64 rate = (u64)parent_rate * m;
+	unsigned int frac_max = pll->frac_max ? pll->frac_max :
+						(1 << pll->frac.width);
 
 	if (frac && MESON_PARM_APPLICABLE(&pll->frac)) {
 		u64 frac_rate = (u64)parent_rate * frac;
 
-		rate += DIV_ROUND_UP_ULL(frac_rate,
-					 (1 << pll->frac.width));
+		rate += DIV_ROUND_UP_ULL(frac_rate, frac_max);
 	}
 
 	return DIV_ROUND_UP_ULL(rate, n);
@@ -100,7 +101,8 @@ static unsigned int __pll_params_with_frac(unsigned long rate,
 					   unsigned int n,
 					   struct meson_clk_pll_data *pll)
 {
-	unsigned int frac_max = (1 << pll->frac.width);
+	unsigned int frac_max = pll->frac_max ? pll->frac_max :
+						(1 << pll->frac.width);
 	u64 val = (u64)rate * n;
 
 	/* Bail out if we are already over the requested rate */

drivers/clk/meson/clk-pll.c

@@ -43,6 +43,7 @@ struct meson_clk_pll_data {
 	unsigned int init_count;
 	const struct pll_params_table *table;
 	const struct pll_mult_range *range;
+	unsigned int frac_max;
 	u8 flags;
 };