[PATCH 12/13] clk: amlogic: Add A9 misc clock control units driver

[Chuan Liu <chuan.liu@amlogic.com>]

Add support for Amlogic miscellaneous clock control units on A9 SoC
family. Certain peripheral clocks do not utilize the standardized models
due to specific requirements. These specialized clock control units are
handled in this driver, including:
  - sc-ccu
  - ts-ccu
  - genout-ccu
  - clk12_24m-ccu
  - vapb_ge2d-ccu
  - di-ccu
  - eth-ccu
  - dualdivmux-ccu
  - mclk-ccu

These clock control units contain multiple sub-clocks. The clock IDs
for each sub-clock are defined in /bindings/clock/amlogic,a9-misc-ccu.h.

Signed-off-by: Chuan Liu <chuan.liu@amlogic.com>
---
 drivers/clk/amlogic/Kconfig       |  10 +
 drivers/clk/amlogic/Makefile      |   5 +
 drivers/clk/amlogic/a9-misc-ccu.c | 960 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 975 insertions(+)

diff --git a/drivers/clk/amlogic/Kconfig b/drivers/clk/amlogic/Kconfig
index 3177a02ecbd5..502aca5332bc 100644
--- a/drivers/clk/amlogic/Kconfig
+++ b/drivers/clk/amlogic/Kconfig
@@ -11,6 +11,15 @@ config COMMON_CLK_AMLOGIC
 	  offering read and write interfaces for various clock control units.
 	  Select Y if your target SoC needs clock driver support.
 
+config COMMON_CLK_AMLOGIC_MISC
+	tristate "Amlogic Misc Clock Control Units"
+	depends on COMMON_CLK_AMLOGIC
+	help
+	  Supports non-standard module clock control units in Amlogic SoC clock
+	  trees, such as sc-ccu (for smart card controller) and ts-ccu (for
+	  temperature sensor). Select Y if the current SoC contains these module
+	  clock control units.
+
 config COMMON_CLK_AMLOGIC_MODEL
 	tristate "Amlogic Standardized Model Clock Control Units"
 	depends on COMMON_CLK_AMLOGIC
@@ -34,6 +43,7 @@ config COMMON_CLK_AMLOGIC_A9
 	tristate "Amlogic A9 Family Clock Controller"
 	depends on COMMON_CLK_AMLOGIC
 	default COMMON_CLK_AMLOGIC
+	select COMMON_CLK_AMLOGIC_MISC
 	select COMMON_CLK_AMLOGIC_MODEL
 	select COMMON_CLK_AMLOGIC_PLL
 	help
diff --git a/drivers/clk/amlogic/Makefile b/drivers/clk/amlogic/Makefile
index 74bf84dbd5a8..b174dce61ae9 100644
--- a/drivers/clk/amlogic/Makefile
+++ b/drivers/clk/amlogic/Makefile
@@ -8,6 +8,11 @@ clk-amlogic-y += clk-composite.o
 clk-amlogic-y += clk-dualdiv.o
 clk-amlogic-y += clk-noglitch.o
 clk-amlogic-y += clk-pll.o
+
+ifneq ($(CONFIG_COMMON_CLK_AMLOGIC_MISC),)
+clk-amlogic-y += a9-misc-ccu.o
+endif
+
 ifneq ($(CONFIG_COMMON_CLK_AMLOGIC_MODEL),)
 clk-amlogic-y += a9-model-ccu.o
 endif
diff --git a/drivers/clk/amlogic/a9-misc-ccu.c b/drivers/clk/amlogic/a9-misc-ccu.c
new file mode 100644
index 000000000000..db130d84ccdd
--- /dev/null
+++ b/drivers/clk/amlogic/a9-misc-ccu.c
@@ -0,0 +1,960 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR MIT)
+/*
+ * Copyright (c) 2026 Amlogic, Inc. All rights reserved
+ */
+
+#include <linux/err.h>
+#include <linux/module.h>
+
+#include "clk.h"
+#include "clk-basic.h"
+#include "clk-composite.h"
+#include "clk-dualdiv.h"
+#include "clk-noglitch.h"
+#include "clk-pll.h"
+
+#include <dt-bindings/clock/amlogic,a9-misc-ccu.h>
+
+static struct aml_clk a9_sc_pre = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_composite_ops,
+	},
+	.type = AML_CLKTYPE_COMPOSITE,
+	.data = &(struct aml_clk_composite_data) {
+		.div_width = 8,
+	},
+};
+
+static struct aml_clk a9_sc = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_sc_pre.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.shift = 16,
+		.width = 4,
+	},
+};
+
+struct clk_hw_onecell_data a9_sc_clk_hw_data = {
+	.hws = {
+		[A9_CLK_SC_PRE]	= &a9_sc_pre.hw,
+		[A9_CLK_SC]	= &a9_sc.hw,
+	},
+	.num = 2,
+};
+
+static struct aml_clk a9_ts_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.shift = 0,
+		.width = 8,
+	},
+};
+
+static struct aml_clk a9_ts = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_ts_div.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.bit_idx = 8,
+	},
+};
+
+struct clk_hw_onecell_data a9_ts_clk_hw_data = {
+	.hws = {
+		[A9_CLK_TS_DIV]	= &a9_ts_div.hw,
+		[A9_CLK_TS]	= &a9_ts.hw,
+	},
+	.num = 2,
+};
+
+static struct aml_clk a9_genout_sel = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_mux_ops,
+	},
+	.type = AML_CLKTYPE_MUX,
+	.data = &(struct aml_clk_mux_data) {
+		.mask = 0x1f,
+		.shift = 12,
+	},
+};
+
+static struct aml_clk a9_genout_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_genout_sel.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.shift = 0,
+		.width = 11,
+	},
+};
+
+static struct aml_clk a9_genout = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_genout_div.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.bit_idx = 11,
+	},
+};
+
+struct clk_hw_onecell_data a9_genout_clk_hw_data = {
+	.hws = {
+		[A9_CLK_GENOUT_SEL]	= &a9_genout_sel.hw,
+		[A9_CLK_GENOUT_DIV]	= &a9_genout_div.hw,
+		[A9_CLK_GENOUT]		= &a9_genout.hw,
+	},
+	.num = 3,
+};
+
+static struct aml_clk a9_clk24m_in = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.bit_idx = 11,
+	},
+};
+
+static struct aml_clk a9_clk12_24m = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_clk24m_in.hw
+		},
+		.num_parents = 1,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.shift = 10,
+		.width = 1,
+	},
+};
+
+struct clk_hw_onecell_data a9_clk12_24m_clk_hw_data = {
+	.hws = {
+		[A9_CLK_24M_IN]	= &a9_clk24m_in.hw,
+		[A9_CLK_12_24M]	= &a9_clk12_24m.hw,
+	},
+	.num = 2,
+};
+
+static struct aml_clk a9_vapb = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_noglitch_ops,
+	},
+	.type = AML_CLKTYPE_NOGLITCH,
+	.data = &(struct aml_clk_composite_data) {
+		.div_width = 7,
+	},
+};
+
+static struct aml_clk a9_ge2d = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_vapb.hw
+		},
+		.num_parents = 1,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.bit_idx = 30,
+	},
+};
+
+struct clk_hw_onecell_data a9_vapbge2d_clk_hw_data = {
+	.hws = {
+		[A9_CLK_VAPB]	= &a9_vapb.hw,
+		[A9_CLK_GE2D]	= &a9_ge2d.hw,
+	},
+	.num = 2,
+};
+
+static struct aml_clk a9_vpu_clkb_temp = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_composite_ops,
+	},
+	.type = AML_CLKTYPE_COMPOSITE,
+	.data = &(struct aml_clk_composite_data) {
+		.bit_offset = 16,
+		.div_width = 4,
+	},
+};
+
+static struct aml_clk a9_vpu_clkb_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_vpu_clkb_temp.hw
+		},
+		.num_parents = 1,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.shift = 0,
+		.width = 8,
+	},
+};
+
+static struct aml_clk a9_vpu_clkb = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_vpu_clkb_div.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.bit_idx = 8,
+	},
+};
+
+struct clk_hw_onecell_data a9_di_clk_hw_data = {
+	.hws = {
+		[A9_CLK_VPU_CLKB_TEMP]	= &a9_vpu_clkb_temp.hw,
+		[A9_CLK_VPU_CLKB_DIV]	= &a9_vpu_clkb_div.hw,
+		[A9_CLK_VPU_CLKB]	= &a9_vpu_clkb.hw,
+	},
+	.num = 3,
+};
+
+static int of_aml_clk_misc_set_parent_table(struct device *dev,
+					    struct aml_clk *clk,
+					    int start_index, int end_index)
+{
+	u32 *ptab = of_aml_clk_get_parent_table(dev, start_index, end_index);
+	struct aml_clk_mux_data *mux_data;
+	struct aml_clk_composite_data *comp_data;
+	struct aml_clk_noglitch_data *noglitch_data;
+
+	if (IS_ERR(ptab))
+		return PTR_ERR(ptab);
+	else if (!ptab) /* parent clock indices are contiguous */
+		return 0;
+
+	switch (clk->type) {
+	case AML_CLKTYPE_MUX:
+		mux_data = clk->data;
+		mux_data->table = ptab;
+		return 0;
+
+	case AML_CLKTYPE_COMPOSITE:
+		comp_data = clk->data;
+		comp_data->table = ptab;
+		return 0;
+
+	case AML_CLKTYPE_NOGLITCH:
+		noglitch_data = clk->data;
+		noglitch_data->table = ptab;
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+/*
+ * The default CCU block diagram is shown below:
+ *            +---------------------------------+
+ *            |  +-------+           +-------+  |
+ *            |  |       |           |       |  |
+ *   clkin0----->|   1   |           |   n   |  |
+ *           ... | level |--> ... -->| level |------>clkout
+ *           ... | clock |           | clock |  |
+ *   clkinn----->|       |           |       |  |
+ *            |  +-------+           +-------+  |
+ *            +---------------------------------+
+ *
+ * By default, the CCU has the following characteristics:
+ *   - The clock specified by "clocks" uses the first-level clock (clkid = 0)
+ *     as its parent.
+ *   - The parent-child relationship among sub-clocks follows this order:
+ *       - hw_data->hws[0] -> ... -> hw_data->hws[n].
+ */
+static int of_aml_clk_misc_init_register(struct device *dev,
+					 struct clk_hw_onecell_data *hw_data)
+{
+	struct device_node *np = dev_of_node(dev);
+	struct aml_clk *clk;
+	struct clk_init_data init;
+	struct clk_parent_data *pdata;
+	u8 pnum;
+	int ret, clkid;
+
+	if (hw_data->num != of_aml_clk_get_count(np))
+		return -EINVAL;
+
+	ret = of_aml_clk_get_parent_num(dev, 0, -1);
+	if (ret < 0)
+		return ret;
+
+	pnum = (u8)ret;
+	pdata = devm_kcalloc(dev, pnum, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return -ENOMEM;
+
+	for (clkid = 0; clkid < hw_data->num; clkid++) {
+		/*
+		 * By default, clocks specified in the DT clocks property act as
+		 * the parent clocks for the first-level CCU clock (clkid == 0).
+		 */
+		if (clkid == 0) {
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 0, -1, pdata, &pnum);
+			if (ret)
+				goto out;
+
+			clk = to_aml_clk(hw_data->hws[clkid]);
+			ret = of_aml_clk_misc_set_parent_table(dev, clk, 0, -1);
+			if (ret)
+				goto out;
+		} else {
+			pnum = 1;
+			/*
+			 *The parent-child relationship among sub-clocks follows
+			 * this order:
+			 *  - hw_data->hws[0] -> ... -> hw_data->hws[n].
+			 */
+			pdata[0].hw = hw_data->hws[clkid - 1];
+		}
+
+		memcpy(&init, hw_data->hws[clkid]->init, sizeof(init));
+		init.name = of_aml_clk_get_name_index(np, clkid);
+		if (!init.name) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		init.num_parents = pnum;
+		init.parent_data = pdata;
+		hw_data->hws[clkid]->init = &init;
+		ret = of_aml_clk_register(dev, hw_data->hws[clkid], clkid);
+		if (ret)
+			goto out;
+	}
+
+out:
+	devm_kfree(dev, pdata);
+
+	return ret;
+}
+
+#define A9_ETH_CLK_NUM		2
+
+static struct aml_clk a9_eth_125m = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.bit_idx = 7,
+	},
+};
+
+static struct aml_clk a9_eth_rmii = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_composite_ops,
+	},
+	.type = AML_CLKTYPE_COMPOSITE,
+	.data = &(struct aml_clk_composite_data) {
+		.div_width = 7,
+	},
+};
+
+struct clk_hw_onecell_data a9_eth_clk_hw_data = {
+	.hws = {
+		[A9_CLK_ETH_125M]	= &a9_eth_125m.hw,
+		[A9_CLK_ETH_RMII]	= &a9_eth_rmii.hw,
+	},
+	.num = A9_ETH_CLK_NUM,
+};
+
+/*
+ * A diagram of the A9 eth-ccu is as follows:
+ *         +------------------------------------------+
+ *         |                             +------+     |
+ * clk125m------------------------------>| gate |-------> eth_125m
+ *         |                             +------+     |
+ *         |     +---------------------------------+  |
+ *         |     |  |\                             |  |
+ * clkin0 --------->| |                            |  |
+ *         |     |  | |      +-----+     +------+  |  |
+ *         | ... |  | |----->| div |---->| gate |-------> eth_rmii
+ *         |     |  | |      +-----+     +------+  |  |
+ * clkin7 --------->| |                            |  |
+ *         |     |  |/       composote-ccu         |  |
+ *         |     +---------------------------------+  |
+ *         +------------------------------------------+
+ */
+static int of_aml_clk_eth_init_register(struct device *dev,
+					struct clk_hw_onecell_data *hw_data)
+{
+	struct device_node *np = dev_of_node(dev);
+	struct aml_clk *clk;
+	struct clk_parent_data pdata[9];
+	u8 pnum;
+	struct clk_init_data init;
+	int ret, clkid;
+
+	if (of_aml_clk_get_count(np) != A9_ETH_CLK_NUM)
+		return -EINVAL;
+
+	for (clkid = 0; clkid < A9_ETH_CLK_NUM; clkid++) {
+		if (clkid == A9_CLK_ETH_125M) { /* eth_125m */
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 0, 0, pdata, &pnum);
+			if (ret)
+				return ret;
+		} else { /* eth_rmii */
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 1, 8, pdata, &pnum);
+			if (ret)
+				return ret;
+
+			clk = to_aml_clk(hw_data->hws[clkid]);
+			ret = of_aml_clk_misc_set_parent_table(dev, clk, 1, 8);
+			if (ret)
+				return ret;
+		}
+
+		memcpy(&init, hw_data->hws[clkid]->init, sizeof(init));
+		init.name = of_aml_clk_get_name_index(np, clkid);
+		if (!init.name)
+			return -EINVAL;
+
+		init.num_parents = pnum;
+		init.parent_data = pdata;
+		hw_data->hws[clkid]->init = &init;
+		ret = of_aml_clk_register(dev, hw_data->hws[clkid], clkid);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+#define A9_DUALDIVMUX_CLK_NUM		2
+
+static struct aml_clk_dualdiv_param a9_dualdiv_table[] = {
+	{ 1, 732, 7, 731, 10 }, /* 32.768k for rtc/cec */
+};
+
+static struct aml_clk a9_dualdiv = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_dualdiv_ops,
+	},
+	.type = AML_CLKTYPE_DUALDIV,
+	.data = &(struct aml_clk_dualdiv_data) {
+		.reg_offset = 0,
+		.table = a9_dualdiv_table,
+		.table_count = ARRAY_SIZE(a9_dualdiv_table),
+	},
+};
+
+static struct aml_clk a9_dualdiv_sel = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_mux_ops,
+		/*
+		 * NOTE: To ensure output clock continuity, the mux can switch
+		 * correctly only when both the current path and the target path
+		 * have valid clock inputs. Otherwise, the mux cannot complete
+		 * the switch.
+		 */
+		.flags = CLK_OPS_PARENT_ENABLE,
+	},
+	.type = AML_CLKTYPE_MUX,
+	.data = &(struct aml_clk_mux_data) {
+		.reg_offset = 4,
+		.mask = 0x3,
+		.shift = 30,
+	},
+};
+
+struct clk_hw_onecell_data a9_dualdiv_clk_hw_data = {
+	.hws = {
+		[A9_CLK_DUALDIV]	= &a9_dualdiv.hw,
+		[A9_CLK_DUALDIV_SEL]	= &a9_dualdiv_sel.hw,
+	},
+	.num = A9_DUALDIVMUX_CLK_NUM,
+};
+
+/*
+ * A diagram of the A9 dualdivmux-ccu is as follows:
+ *       +--------------------------------------+
+ *       |  +---------+                         |
+ *       |  |         |                         |
+ * divin--->| dualdiv |--+                      |
+ *       |  |         |  |                      |
+ *       |  +---------+  |   +---+         |\   |
+ *       |               +-->| ~ |--mux0-->| |  |
+ * clk0--------------------->| ~ |--mux1-->| |------> out
+ * clk1--------------------->| ~ |--mux2-->| |  |
+ * clk2--------------------->| ~ |--mux3-->|/   |
+ *       |                   +---+              |
+ *       +--------------------------------------+
+ *
+ * Its internal multiplexer selects from up to 4 parent clocks, one of which
+ * must be 'dualdiv' output clock.
+ */
+static int of_aml_clk_dualdiv_init_register(struct device *dev,
+					    struct clk_hw_onecell_data *hw_data)
+{
+	struct device_node *np = dev_of_node(dev);
+	struct aml_clk *clk;
+	struct clk_parent_data pdata[5];
+	u8 pnum;
+	struct clk_init_data init;
+	int ret, clkid;
+
+	if (of_aml_clk_get_count(np) != A9_DUALDIVMUX_CLK_NUM)
+		return -EINVAL;
+
+	for (clkid = 0; clkid < A9_DUALDIVMUX_CLK_NUM; clkid++) {
+		if (clkid == A9_CLK_DUALDIV) { /* dualdiv */
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 0, 0, pdata, &pnum);
+			if (ret)
+				return ret;
+		} else { /* dualdiv_sel */
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 1, 4, pdata, &pnum);
+			if (ret)
+				return ret;
+
+			clk = to_aml_clk(hw_data->hws[clkid]);
+			ret = of_aml_clk_misc_set_parent_table(dev, clk, 1, 4);
+			if (ret)
+				return ret;
+		}
+
+		memcpy(&init, hw_data->hws[clkid]->init, sizeof(init));
+		init.name = of_aml_clk_get_name_index(np, clkid);
+		if (!init.name)
+			return -EINVAL;
+
+		init.num_parents = pnum;
+		init.parent_data = pdata;
+		hw_data->hws[clkid]->init = &init;
+		ret = of_aml_clk_register(dev, hw_data->hws[clkid], clkid);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static struct aml_clk a9_mclk0_pre_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.num_parents = 1,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.reg_offset = 0xc,
+		.shift = 3,
+		.width = 5,
+		.flags = CLK_DIVIDER_MAX_AT_ZERO,
+	},
+};
+
+static struct aml_clk a9_mclk0_sel = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_mux_ops,
+	},
+	.type = AML_CLKTYPE_MUX,
+	.data = &(struct aml_clk_mux_data) {
+		.reg_offset = 0xc,
+		.mask = 0x3,
+		.shift = 12,
+	},
+};
+
+static struct aml_clk a9_mclk0_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_mclk0_sel.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.reg_offset = 0xc,
+		.shift = 9,
+		.width = 1,
+	},
+};
+
+static struct aml_clk a9_mclk0 = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_mclk0_div.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.reg_offset = 0xc,
+		.bit_idx = 8,
+	},
+};
+
+static struct aml_clk a9_mclk1_pre_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.num_parents = 1,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.reg_offset = 0xc,
+		.shift = 19,
+		.width = 5,
+		.flags = CLK_DIVIDER_MAX_AT_ZERO,
+	},
+};
+
+static struct aml_clk a9_mclk1_sel = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_mux_ops,
+	},
+	.type = AML_CLKTYPE_MUX,
+	.data = &(struct aml_clk_mux_data) {
+		.reg_offset = 0xc,
+		.mask = 0x3,
+		.shift = 28,
+	},
+};
+
+static struct aml_clk a9_mclk1_div = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_divider_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_mclk1_sel.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_DIV,
+	.data = &(struct aml_clk_divider_data) {
+		.reg_offset = 0xc,
+		.shift = 25,
+		.width = 1,
+	},
+};
+
+static struct aml_clk a9_mclk1 = {
+	.hw.init = &(const struct clk_init_data) {
+		.ops = &aml_clk_gate_ops,
+		.parent_hws = (const struct clk_hw *[]) {
+			&a9_mclk1_div.hw
+		},
+		.num_parents = 1,
+		.flags = CLK_SET_RATE_PARENT,
+	},
+	.type = AML_CLKTYPE_GATE,
+	.data = &(struct aml_clk_gate_data) {
+		.reg_offset = 0xc,
+		.bit_idx = 24,
+	},
+};
+
+#define A9_MCLK_CLK_NUM		8
+
+struct clk_hw_onecell_data a9_mclk_clk_hw_data = {
+	.hws = {
+		[A9_CLK_MCLK_0_PRE_DIV]	= &a9_mclk0_pre_div.hw,
+		[A9_CLK_MCLK_0_SEL]	= &a9_mclk0_sel.hw,
+		[A9_CLK_MCLK_0_DIV]	= &a9_mclk0_div.hw,
+		[A9_CLK_MCLK_0]		= &a9_mclk0.hw,
+		[A9_CLK_MCLK_1_PRE_DIV]	= &a9_mclk1_pre_div.hw,
+		[A9_CLK_MCLK_1_SEL]	= &a9_mclk1_sel.hw,
+		[A9_CLK_MCLK_1_DIV]	= &a9_mclk1_div.hw,
+		[A9_CLK_MCLK_1]		= &a9_mclk1.hw,
+	},
+	.num = A9_MCLK_CLK_NUM,
+};
+
+/*
+ * A diagram of the A9 mclk-ccu is as follows:
+ *        +--------------------------------------------------+
+ *        |              +-----+                             |
+ * divin--------------+->| div |-->|\                        |
+ *        |           |  +-----+   | |                       |
+ * clk0 -----------+-------------->| |   +-----+   +------+  |
+ *        |        |  |            | |-->| div |-->| gate |-----> mclk0
+ * clk1 --------+----------------->| |   +-----+   +------+  |
+ *        |     |  |  |            | |                       |
+ * clk2 -----+-------------------->|/                        |
+ *        |  |  |  |  |  +-----+                             |
+ *        |  |  |  |  +->| div |-->|\                        |
+ *        |  |  |  |     +-----+   | |                       |
+ *        |  |  |  +-------------->| |   +-----+   +------+  |
+ *        |  |  |                  | |-->| div |-->| gate |-----> mclk1
+ *        |  |  +----------------->| |   +-----+   +------+  |
+ *        |  |                     | |                       |
+ *        |  +-------------------->|/                        |
+ *        +--------------------------------------------------+
+ *
+ * The A9 mclk-ccu contains two identical mclk sub-modules. For each sub-module,
+ * channel 0 of the mux (mclk0/1_sel) has an independent pre-divider in front
+ * of it, while the clock sources for channels 1 to 3 are shared and identical.
+ */
+static int of_aml_clk_mclk_init_register(struct device *dev,
+					 struct clk_hw_onecell_data *hw_data)
+{
+	struct device_node *np = dev_of_node(dev);
+	struct aml_clk *clk;
+	struct clk_parent_data pdata[5];
+	u8 pnum;
+	struct clk_init_data init;
+	int ret, clkid;
+
+	if (of_aml_clk_get_count(np) != A9_MCLK_CLK_NUM)
+		return -EINVAL;
+
+	for (clkid = 0; clkid < A9_MCLK_CLK_NUM; clkid++) {
+		if (clkid == A9_CLK_MCLK_0_PRE_DIV ||
+		    clkid == A9_CLK_MCLK_1_PRE_DIV) {
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 0, 0, pdata, &pnum);
+			if (ret)
+				return ret;
+		} else if (clkid == A9_CLK_MCLK_0_SEL ||
+			   clkid == A9_CLK_MCLK_1_SEL) {
+			ret = of_aml_clk_get_parent_data(dev, hw_data->hws,
+							 1, 4, &pdata[1], &pnum);
+			if (ret)
+				return ret;
+
+			/* Add the clock source for channel 0 of mclk0/1_sel */
+			pdata[0].hw = hw_data->hws[clkid - 1];
+			pnum += 1;
+
+			clk = to_aml_clk(hw_data->hws[clkid]);
+			ret = of_aml_clk_misc_set_parent_table(dev, clk, 1, 4);
+			if (ret)
+				return ret;
+		} else {
+			pnum = 1;
+			/*
+			 *The parent-child relationship among sub-clocks follows
+			 * this order:
+			 *  - hw_data->hws[0] -> ... -> hw_data->hws[n].
+			 */
+			pdata[0].hw = hw_data->hws[clkid - 1];
+		}
+
+		memcpy(&init, hw_data->hws[clkid]->init, sizeof(init));
+		init.name = of_aml_clk_get_name_index(np, clkid);
+		if (!init.name)
+			return -EINVAL;
+
+		init.num_parents = pnum;
+		init.parent_data = pdata;
+		hw_data->hws[clkid]->init = &init;
+		ret = of_aml_clk_register(dev, hw_data->hws[clkid], clkid);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int aml_clk_get_clk_data_size(enum aml_clk_type type)
+{
+	switch (type) {
+	case AML_CLKTYPE_MUX:
+		return sizeof(struct aml_clk_mux_data);
+
+	case AML_CLKTYPE_DIV:
+		return sizeof(struct aml_clk_divider_data);
+
+	case AML_CLKTYPE_GATE:
+		return sizeof(struct aml_clk_gate_data);
+
+	case AML_CLKTYPE_COMPOSITE:
+		return sizeof(struct aml_clk_composite_data);
+
+	case AML_CLKTYPE_NOGLITCH:
+		return sizeof(struct aml_clk_noglitch_data);
+
+	case AML_CLKTYPE_DUALDIV:
+		return sizeof(struct aml_clk_dualdiv_data);
+
+	case AML_CLKTYPE_PLL:
+		return sizeof(struct aml_pll_data);
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static struct clk_hw_onecell_data *
+aml_clk_misc_alloc_hw_data(struct device *dev, struct regmap *regmap,
+			   struct clk_hw_onecell_data *hw_data_tmp)
+{
+	struct device_node *np = dev_of_node(dev);
+	int clk_num;
+	int ret, clkid;
+	struct clk_hw_onecell_data *hw_data;
+	struct aml_clk *clk;
+	struct aml_clk *clk_tmp;
+
+	clk_num = of_aml_clk_get_count(np);
+	if (clk_num != hw_data_tmp->num)
+		return ERR_PTR(-EINVAL);
+
+	hw_data = devm_kzalloc(dev, struct_size(hw_data, hws, clk_num),
+			       GFP_KERNEL);
+	if (!hw_data)
+		return ERR_PTR(-ENOMEM);
+
+	hw_data->num = clk_num;
+	for (clkid = 0; clkid < clk_num; clkid++) {
+		clk_tmp = to_aml_clk(hw_data_tmp->hws[clkid]);
+		clk = devm_kmemdup(dev, clk_tmp, sizeof(*clk), GFP_KERNEL);
+		if (!clk)
+			return ERR_PTR(-ENOMEM);
+
+		clk->map = regmap;
+		hw_data->hws[clkid] = &clk->hw;
+		ret = aml_clk_get_clk_data_size(clk_tmp->type);
+		if (ret < 0)
+			return ERR_PTR(ret);
+
+		clk->data = devm_kmemdup(dev, clk_tmp->data, ret, GFP_KERNEL);
+		if (!clk->data)
+			return ERR_PTR(-ENOMEM);
+	}
+
+	return hw_data;
+}
+
+static int of_aml_clk_misc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct regmap *regmap;
+	int ret;
+	struct clk_hw_onecell_data *hw_data, *hw_data_tmp;
+
+	/*
+	 * NOTE: Here, the pointer returned by of_device_get_match_data() points
+	 * to non-const data, and the hw_data parameter passed to
+	 * devm_of_clk_add_hw_provider() is also of type (void *).
+	 */
+	hw_data_tmp = (void *)of_device_get_match_data(dev);
+	if (!hw_data_tmp)
+		return -EFAULT;
+
+	regmap = aml_clk_regmap_init(pdev);
+	if (IS_ERR_OR_NULL(regmap))
+		return -EIO;
+
+	hw_data = aml_clk_misc_alloc_hw_data(dev, regmap, hw_data_tmp);
+	if (IS_ERR(hw_data))
+		return PTR_ERR(hw_data);
+
+	of_aml_clk_regs_init(dev);
+	if (hw_data_tmp == &a9_eth_clk_hw_data)
+		ret = of_aml_clk_eth_init_register(dev, hw_data);
+	else if (hw_data_tmp == &a9_dualdiv_clk_hw_data)
+		ret = of_aml_clk_dualdiv_init_register(dev, hw_data);
+	else if (hw_data_tmp == &a9_mclk_clk_hw_data)
+		ret = of_aml_clk_mclk_init_register(dev, hw_data);
+	else
+		ret = of_aml_clk_misc_init_register(dev, hw_data);
+	if (ret)
+		return ret;
+
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+					   hw_data);
+}
+
+static const struct of_device_id of_aml_clk_misc_match_table[] = {
+	{
+		.compatible = "amlogic,a9-sc-ccu",
+		.data = &a9_sc_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-ts-ccu",
+		.data = &a9_ts_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-genout-ccu",
+		.data = &a9_genout_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-clk12_24m-ccu",
+		.data = &a9_clk12_24m_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-vapb_ge2d-ccu",
+		.data = &a9_vapbge2d_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-di-ccu",
+		.data = &a9_di_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-eth-ccu",
+		.data = &a9_eth_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-dualdivmux-ccu",
+		.data = &a9_dualdiv_clk_hw_data,
+	},
+	{
+		.compatible = "amlogic,a9-mclk-ccu",
+		.data = &a9_mclk_clk_hw_data,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, of_aml_clk_misc_match_table);
+
+static struct platform_driver of_aml_clk_misc_driver = {
+	.probe		= of_aml_clk_misc_probe,
+	.driver		= {
+		.name	= "aml-misc-clk",
+		.of_match_table = of_aml_clk_misc_match_table,
+	},
+};
+module_platform_driver(of_aml_clk_misc_driver);
+
+MODULE_DESCRIPTION("Amlogic A9 Misc Clock Control Units Driver");
+MODULE_AUTHOR("Chuan Liu <chuan.liu@amlogic.com>");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("CLK_AMLOGIC");

-- 
2.42.0