]> git.dujemihanovic.xyz Git - u-boot.git/commitdiff
clk: Add clock driver for Amlogic A1
authorIgor Prusov <ivprusov@salutedevices.com>
Mon, 25 Sep 2023 15:52:09 +0000 (18:52 +0300)
committerNeil Armstrong <neil.armstrong@linaro.org>
Thu, 12 Oct 2023 11:39:41 +0000 (13:39 +0200)
This patch adds basic clock driver for Amlogic A1 Family which supports
enabling/disabling some gates, getting frequencies and setting rate
with limited reparenting.

Signed-off-by: Igor Prusov <ivprusov@salutedevices.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Link: https://lore.kernel.org/r/20230925155209.130671-3-ivprusov@salutedevices.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
arch/arm/include/asm/arch-meson/clock-a1.h [new file with mode: 0644]
drivers/clk/meson/Kconfig
drivers/clk/meson/Makefile
drivers/clk/meson/a1.c [new file with mode: 0644]

diff --git a/arch/arm/include/asm/arch-meson/clock-a1.h b/arch/arm/include/asm/arch-meson/clock-a1.h
new file mode 100644 (file)
index 0000000..f6795f5
--- /dev/null
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2018 - AmLogic, Inc.
+ * Copyright 2023 (C) SberDevices, Inc.
+ */
+
+#ifndef _ARCH_MESON_CLOCK_A1_H_
+#define _ARCH_MESON_CLOCK_A1_H_
+
+/*
+ * Clock controller register offsets
+ */
+#define A1_SYS_OSCIN_CTRL              0x0
+#define A1_SYS_CLK_CTRL0               0x10
+#define A1_SYS_CLK_EN0                 0x1c
+#define A1_SAR_ADC_CLK_CTR             0xc0
+#define A1_SPIFC_CLK_CTRL              0xd8
+#define A1_USB_BUSCLK_CTRL             0xdc
+#define A1_SD_EMMC_CLK_CTRL            0xe0
+
+#define A1_ANACTRL_FIXPLL_CTRL0                0x0
+
+#endif /* _ARCH_MESON_CLOCK_A1_H_ */
index 994b44ad7ab81f4c24539ae2e7263b01ac361ff6..cdc9d6f76cea986ed2225500c66781a99018d031 100644 (file)
@@ -21,3 +21,11 @@ config CLK_MESON_G12A
        help
          Enable clock support for the Amlogic G12A SoC family, such as
          the S905X/D2
+
+config CLK_MESON_A1
+       bool "Enable clock support for Amlogic A1"
+       depends on CLK && ARCH_MESON
+       default MESON_A1
+       help
+         Enable clock support for the Amlogic A1 SoC family, such as
+         the A113L
index a486b13e9ce757b31aac148b9170be3b47e83d70..d975f07aab002c570635b9ed8772ff06e5bb7b77 100644 (file)
@@ -8,3 +8,4 @@ obj-$(CONFIG_CLK_MESON_AXG) += axg.o
 obj-$(CONFIG_CLK_MESON_AXG) += axg-ao.o
 obj-$(CONFIG_CLK_MESON_G12A) += g12a.o
 obj-$(CONFIG_CLK_MESON_G12A) += g12a-ao.o
+obj-$(CONFIG_CLK_MESON_A1) += a1.o
diff --git a/drivers/clk/meson/a1.c b/drivers/clk/meson/a1.c
new file mode 100644 (file)
index 0000000..3aec42f
--- /dev/null
@@ -0,0 +1,723 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2023 SberDevices, Inc.
+ * Author: Igor Prusov <ivprusov@salutedevices.com>
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <regmap.h>
+#include <asm/arch/clock-a1.h>
+#include <dt-bindings/clock/amlogic,a1-pll-clkc.h>
+#include <dt-bindings/clock/amlogic,a1-peripherals-clkc.h>
+#include "clk_meson.h"
+
+/*
+ * This driver supports both PLL and peripherals clock sources.
+ * Following operations are supported:
+ * - calculating clock frequency on a limited tree
+ * - reading muxes and dividers
+ * - enabling/disabling gates without propagation
+ * - reparenting without rate propagation, only on muxes
+ * - setting rates with limited reparenting, only on dividers with mux parent
+ */
+
+#define NR_CLKS                                154
+#define NR_PLL_CLKS                    11
+
+/* External clock IDs. Those should not overlap with regular IDs */
+#define EXTERNAL_XTAL                  (NR_CLKS + 0)
+#define EXTERNAL_FCLK_DIV2             (NR_CLKS + 1)
+#define EXTERNAL_FCLK_DIV3             (NR_CLKS + 2)
+#define EXTERNAL_FCLK_DIV5             (NR_CLKS + 3)
+#define EXTERNAL_FCLK_DIV7             (NR_CLKS + 4)
+
+#define EXTERNAL_FIXPLL_IN             (NR_PLL_CLKS + 1)
+
+#define SET_PARM_VALUE(_priv, _parm, _val)                             \
+       regmap_update_bits((_priv)->map, (_parm)->reg_off,              \
+                          SETPMASK((_parm)->width, (_parm)->shift),    \
+                          (_val) << (_parm)->shift)
+
+#define GET_PARM_VALUE(_priv, _parm)                                   \
+({                                                                     \
+       uint _reg;                                                      \
+       regmap_read((_priv)->map, (_parm)->reg_off, &_reg);             \
+       PARM_GET((_parm)->width, (_parm)->shift, _reg);                 \
+})
+
+struct meson_clk {
+       struct regmap *map;
+};
+
+/**
+ * enum meson_clk_type - The type of clock
+ * @MESON_CLK_ANY: Special value that matches any clock type
+ * @MESON_CLK_GATE: This clock is a gate
+ * @MESON_CLK_MUX: This clock is a multiplexer
+ * @MESON_CLK_DIV: This clock is a configurable divider
+ * @MESON_CLK_FIXED_DIV: This clock is a configurable divider
+ * @MESON_CLK_EXTERNAL: This is an external clock from different clock provider
+ * @MESON_CLK_PLL: This is a PLL
+ */
+enum meson_clk_type {
+       MESON_CLK_ANY = 0,
+       MESON_CLK_GATE,
+       MESON_CLK_MUX,
+       MESON_CLK_DIV,
+       MESON_CLK_FIXED_DIV,
+       MESON_CLK_EXTERNAL,
+       MESON_CLK_PLL,
+};
+
+/**
+ * struct meson_clk_info - The parameters defining a clock
+ * @name: Name of the clock
+ * @parm: Register bits description for muxes and dividers
+ * @div: Fixed divider value
+ * @parents: List of parent clock IDs
+ * @type: Clock type
+ */
+struct meson_clk_info {
+       const char *name;
+       union {
+               const struct parm *parm;
+               u8 div;
+       };
+       const unsigned int *parents;
+       const enum meson_clk_type type;
+};
+
+/**
+ * struct meson_clk_data - Clocks supported by clock provider
+ * @num_clocks: Number of clocks
+ * @clocks: Array of clock descriptions
+ *
+ */
+struct meson_clk_data {
+       const u8 num_clocks;
+       const struct meson_clk_info **clocks;
+};
+
+/* Clock description initialization macros */
+
+/* A multiplexer */
+#define CLK_MUX(_name, _reg, _shift, _width, ...)                      \
+       (&(struct meson_clk_info){                                      \
+               .parents = (const unsigned int[])__VA_ARGS__,           \
+               .parm = &(struct parm) {                                \
+                       .reg_off = (_reg),                              \
+                       .shift = (_shift),                              \
+                       .width = (_width),                              \
+               },                                                      \
+               .name = (_name),                                        \
+               .type = MESON_CLK_MUX,                                  \
+       })
+
+/* A divider with an integral divisor */
+#define CLK_DIV(_name, _reg, _shift, _width, _parent)                  \
+       (&(struct meson_clk_info){                                      \
+               .parents = (const unsigned int[]) { (_parent) },        \
+               .parm = &(struct parm) {                                \
+                       .reg_off = (_reg),                              \
+                       .shift = (_shift),                              \
+                       .width = (_width),                              \
+               },                                                      \
+               .name = (_name),                                        \
+               .type = MESON_CLK_DIV,                                  \
+       })
+
+/* A fixed divider */
+#define CLK_DIV_FIXED(_name, _div, _parent)                            \
+       (&(struct meson_clk_info){                                      \
+               .parents = (const unsigned int[]) { (_parent) },        \
+               .div = (_div),                                          \
+               .name = (_name),                                        \
+               .type = MESON_CLK_FIXED_DIV,                            \
+       })
+
+/* An external clock */
+#define CLK_EXTERNAL(_name)                                            \
+       (&(struct meson_clk_info){                                      \
+               .name = (_name),                                        \
+               .parents = (const unsigned int[]) { -ENOENT },          \
+               .type = MESON_CLK_EXTERNAL,                             \
+       })
+
+/* A clock gate */
+#define CLK_GATE(_name, _reg, _shift, _parent)                         \
+       (&(struct meson_clk_info){                                      \
+               .parents = (const unsigned int[]) { (_parent) },        \
+               .parm = &(struct parm) {                                \
+                       .reg_off = (_reg),                              \
+                       .shift = (_shift),                              \
+                       .width = 1,                                     \
+               },                                                      \
+               .name = (_name),                                        \
+               .type = MESON_CLK_GATE,                                 \
+       })
+
+/* A PLL clock */
+#define CLK_PLL(_name, _parent, ...)                                   \
+       (&(struct meson_clk_info){                                      \
+               .name = (_name),                                        \
+               .parents = (const unsigned int[]) { (_parent) },        \
+               .parm = (const struct parm[])__VA_ARGS__,               \
+               .type = MESON_CLK_PLL,                                  \
+       })
+
+/* A1 peripherals clocks */
+static const struct meson_clk_info *meson_clocks[] = {
+       [CLKID_SPIFC_SEL] = CLK_MUX("spifc_sel", A1_SPIFC_CLK_CTRL, 9, 2, {
+               EXTERNAL_FCLK_DIV2,
+               EXTERNAL_FCLK_DIV3,
+               EXTERNAL_FCLK_DIV5,
+               -ENOENT,
+       }),
+       [CLKID_SPIFC_SEL2] = CLK_MUX("spifc_sel2", A1_SPIFC_CLK_CTRL, 15, 1, {
+               CLKID_SPIFC_DIV,
+               EXTERNAL_XTAL,
+       }),
+       [CLKID_USB_BUS_SEL] = CLK_MUX("usb_bus_sel", A1_USB_BUSCLK_CTRL, 9, 2, {
+               -ENOENT,
+               CLKID_SYS,
+               EXTERNAL_FCLK_DIV3,
+               EXTERNAL_FCLK_DIV5,
+       }),
+       [CLKID_SYS] = CLK_MUX("sys", A1_SYS_CLK_CTRL0, 31, 1, {
+               CLKID_SYS_A,
+               CLKID_SYS_B,
+       }),
+       [CLKID_SYS_A_SEL] = CLK_MUX("sys_a_sel", A1_SYS_CLK_CTRL0, 10, 3, {
+               -ENOENT,
+               EXTERNAL_FCLK_DIV2,
+               EXTERNAL_FCLK_DIV3,
+               EXTERNAL_FCLK_DIV5,
+               -ENOENT,
+               -ENOENT,
+               -ENOENT,
+               -ENOENT,
+       }),
+       [CLKID_SYS_B_SEL] = CLK_MUX("sys_b_sel", A1_SYS_CLK_CTRL0, 26, 3, {
+               -ENOENT,
+               EXTERNAL_FCLK_DIV2,
+               EXTERNAL_FCLK_DIV3,
+               EXTERNAL_FCLK_DIV5,
+               -ENOENT,
+               -ENOENT,
+               -ENOENT,
+               -ENOENT,
+       }),
+
+       [CLKID_SPIFC_DIV] = CLK_DIV("spifc_div", A1_SPIFC_CLK_CTRL, 0, 8,
+               CLKID_SPIFC_SEL
+       ),
+       [CLKID_USB_BUS_DIV] = CLK_DIV("usb_bus_div", A1_USB_BUSCLK_CTRL, 0, 8,
+               CLKID_USB_BUS_SEL
+       ),
+       [CLKID_SYS_A_DIV] = CLK_DIV("sys_a_div", A1_SYS_CLK_CTRL0, 0, 10,
+               CLKID_SYS_A_SEL
+       ),
+       [CLKID_SYS_B_DIV] = CLK_DIV("sys_b_div", A1_SYS_CLK_CTRL0, 16, 10,
+               CLKID_SYS_B_SEL
+       ),
+
+       [CLKID_SPIFC] = CLK_GATE("spifc", A1_SPIFC_CLK_CTRL, 8,
+               CLKID_SPIFC_SEL2
+       ),
+       [CLKID_USB_BUS] = CLK_GATE("usb_bus", A1_USB_BUSCLK_CTRL, 8,
+               CLKID_USB_BUS_DIV
+       ),
+       [CLKID_SYS_A] = CLK_GATE("sys_a", A1_SYS_CLK_CTRL0, 13,
+               CLKID_SYS_A_DIV
+       ),
+       [CLKID_SYS_B] = CLK_GATE("sys_b", A1_SYS_CLK_CTRL0, 29,
+               CLKID_SYS_B_DIV
+       ),
+       [CLKID_FIXPLL_IN] = CLK_GATE("fixpll_in", A1_SYS_OSCIN_CTRL, 1,
+               EXTERNAL_XTAL
+       ),
+       [CLKID_SARADC] = CLK_GATE("saradc", A1_SAR_ADC_CLK_CTR, 8,
+               -ENOENT
+       ),
+       [CLKID_SARADC_EN] = CLK_GATE("saradc_en", A1_SYS_CLK_EN0, 13,
+               CLKID_SYS
+       ),
+
+       [EXTERNAL_XTAL] = CLK_EXTERNAL("xtal"),
+       [EXTERNAL_FCLK_DIV2] = CLK_EXTERNAL("fclk_div2"),
+       [EXTERNAL_FCLK_DIV3] = CLK_EXTERNAL("fclk_div3"),
+       [EXTERNAL_FCLK_DIV5] = CLK_EXTERNAL("fclk_div5"),
+       [EXTERNAL_FCLK_DIV7] = CLK_EXTERNAL("fclk_div7"),
+};
+
+/* A1 PLL clocks */
+static const struct meson_clk_info *meson_pll_clocks[] = {
+       [EXTERNAL_FIXPLL_IN] = CLK_EXTERNAL("fixpll_in"),
+
+       [CLKID_FIXED_PLL_DCO] = CLK_PLL("fixed_pll_dco", EXTERNAL_FIXPLL_IN, {
+                       {A1_ANACTRL_FIXPLL_CTRL0, 0, 8},
+                       {A1_ANACTRL_FIXPLL_CTRL0, 10, 5},
+       }),
+
+       [CLKID_FCLK_DIV2_DIV] = CLK_DIV_FIXED("fclk_div2_div", 2,
+               CLKID_FIXED_PLL
+       ),
+       [CLKID_FCLK_DIV3_DIV] = CLK_DIV_FIXED("fclk_div3_div", 3,
+               CLKID_FIXED_PLL
+       ),
+       [CLKID_FCLK_DIV5_DIV] = CLK_DIV_FIXED("fclk_div5_div", 5,
+               CLKID_FIXED_PLL
+       ),
+       [CLKID_FCLK_DIV7_DIV] = CLK_DIV_FIXED("fclk_div7_div", 7,
+               CLKID_FIXED_PLL
+       ),
+
+       [CLKID_FIXED_PLL] = CLK_GATE("fixed_pll", A1_ANACTRL_FIXPLL_CTRL0, 20,
+               CLKID_FIXED_PLL_DCO
+       ),
+       [CLKID_FCLK_DIV2] = CLK_GATE("fclk_div2", A1_ANACTRL_FIXPLL_CTRL0, 21,
+               CLKID_FCLK_DIV2_DIV
+       ),
+       [CLKID_FCLK_DIV3] = CLK_GATE("fclk_div3", A1_ANACTRL_FIXPLL_CTRL0, 22,
+               CLKID_FCLK_DIV3_DIV
+       ),
+       [CLKID_FCLK_DIV5] = CLK_GATE("fclk_div5", A1_ANACTRL_FIXPLL_CTRL0, 23,
+               CLKID_FCLK_DIV5_DIV
+       ),
+       [CLKID_FCLK_DIV7] = CLK_GATE("fclk_div7", A1_ANACTRL_FIXPLL_CTRL0, 24,
+               CLKID_FCLK_DIV7_DIV
+       ),
+};
+
+static const struct meson_clk_info *meson_clk_get_info(struct clk *clk, ulong id,
+                                                      enum meson_clk_type type)
+{
+       struct meson_clk_data *data;
+       const struct meson_clk_info *info;
+
+       data = (struct meson_clk_data *)dev_get_driver_data(clk->dev);
+       if (id >= data->num_clocks)
+               return ERR_PTR(-EINVAL);
+
+       info = data->clocks[id];
+       if (!info)
+               return ERR_PTR(-ENOENT);
+
+       if (type != MESON_CLK_ANY && type != info->type)
+               return ERR_PTR(-EINVAL);
+
+       return info;
+}
+
+static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id);
+
+static int meson_set_gate(struct clk *clk, bool on)
+{
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+       const struct meson_clk_info *info;
+
+       debug("%s: %sabling %lu\n", __func__, on ? "en" : "dis", clk->id);
+
+       info = meson_clk_get_info(clk, clk->id, MESON_CLK_ANY);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       SET_PARM_VALUE(priv, info->parm, on);
+
+       return 0;
+}
+
+static int meson_clk_enable(struct clk *clk)
+{
+       return meson_set_gate(clk, true);
+}
+
+static int meson_clk_disable(struct clk *clk)
+{
+       return meson_set_gate(clk, false);
+}
+
+static ulong meson_div_get_rate(struct clk *clk, unsigned long id)
+{
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+       u16 n;
+       ulong rate;
+       const struct meson_clk_info *info;
+
+       info = meson_clk_get_info(clk, id, MESON_CLK_DIV);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       /* Actual divider value is (field value + 1), hence the increment */
+       n = GET_PARM_VALUE(priv, info->parm) + 1;
+
+       rate = meson_clk_get_rate_by_id(clk, info->parents[0]);
+
+       return rate / n;
+}
+
+static int meson_clk_get_parent(struct clk *clk, unsigned long id)
+{
+       uint reg = 0;
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+       const struct meson_clk_info *info;
+
+       info = meson_clk_get_info(clk, id, MESON_CLK_ANY);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       /* For muxes we read currently selected parent from register,
+        * for other types there is always only one element in parents array.
+        */
+       if (info->type == MESON_CLK_MUX) {
+               reg = GET_PARM_VALUE(priv, info->parm);
+               if (IS_ERR_VALUE(reg))
+                       return reg;
+       }
+
+       return info->parents[reg];
+}
+
+static ulong meson_pll_get_rate(struct clk *clk, unsigned long id)
+{
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+       const struct meson_clk_info *info;
+       const struct parm *pm, *pn;
+       ulong parent_rate_mhz;
+       unsigned int parent;
+       u16 n, m;
+
+       info = meson_clk_get_info(clk, id, MESON_CLK_ANY);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       pm = &info->parm[0];
+       pn = &info->parm[1];
+
+       n = GET_PARM_VALUE(priv, pn);
+       m = GET_PARM_VALUE(priv, pm);
+
+       if (n == 0)
+               return -EINVAL;
+
+       parent = info->parents[0];
+       parent_rate_mhz = meson_clk_get_rate_by_id(clk, parent) / 1000000;
+
+       return parent_rate_mhz * m / n * 1000000;
+}
+
+static ulong meson_clk_get_rate_by_id(struct clk *clk, unsigned long id)
+{
+       ulong rate, parent;
+       const struct meson_clk_info *info;
+
+       if (IS_ERR_VALUE(id))
+               return id;
+
+       info = meson_clk_get_info(clk, id, MESON_CLK_ANY);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       switch (info->type) {
+       case MESON_CLK_PLL:
+               rate = meson_pll_get_rate(clk, id);
+               break;
+       case MESON_CLK_GATE:
+       case MESON_CLK_MUX:
+               parent = meson_clk_get_parent(clk, id);
+               rate = meson_clk_get_rate_by_id(clk, parent);
+               break;
+       case MESON_CLK_DIV:
+               rate = meson_div_get_rate(clk, id);
+               break;
+       case MESON_CLK_FIXED_DIV:
+               parent = meson_clk_get_parent(clk, id);
+               rate = meson_clk_get_rate_by_id(clk, parent) / info->div;
+               break;
+       case MESON_CLK_EXTERNAL: {
+               int ret;
+               struct clk external_clk;
+
+               ret = clk_get_by_name(clk->dev, info->name, &external_clk);
+               if (ret)
+                       return ret;
+
+               rate = clk_get_rate(&external_clk);
+               break;
+       }
+       default:
+               rate = -EINVAL;
+               break;
+       }
+
+       return rate;
+}
+
+static ulong meson_clk_get_rate(struct clk *clk)
+{
+       return meson_clk_get_rate_by_id(clk, clk->id);
+}
+
+/* This implements rate propagation for dividers placed after multiplexer:
+ *  ---------|\
+ *     ..... | |---DIV--
+ *  ---------|/
+ */
+static ulong meson_composite_set_rate(struct clk *clk, ulong id, ulong rate)
+{
+       unsigned int i, best_div_val;
+       unsigned long best_delta, best_parent;
+       const struct meson_clk_info *div;
+       const struct meson_clk_info *mux;
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+
+       div = meson_clk_get_info(clk, id, MESON_CLK_DIV);
+       if (IS_ERR(div))
+               return PTR_ERR(div);
+
+       mux = meson_clk_get_info(clk, div->parents[0], MESON_CLK_MUX);
+       if (IS_ERR(mux))
+               return PTR_ERR(mux);
+
+       best_parent = -EINVAL;
+       best_delta = ULONG_MAX;
+       for (i = 0; i < (1 << mux->parm->width); i++) {
+               unsigned long parent_rate, delta;
+               unsigned int div_val;
+
+               parent_rate = meson_clk_get_rate_by_id(clk, mux->parents[i]);
+               if (IS_ERR_VALUE(parent_rate))
+                       continue;
+
+               /* If overflow, try to use max divider value */
+               div_val = min(DIV_ROUND_CLOSEST(parent_rate, rate),
+                             (1UL << div->parm->width));
+
+               delta = abs(rate - (parent_rate / div_val));
+               if (delta < best_delta) {
+                       best_delta = delta;
+                       best_div_val = div_val;
+                       best_parent = i;
+               }
+       }
+
+       if (IS_ERR_VALUE(best_parent))
+               return best_parent;
+
+       SET_PARM_VALUE(priv, mux->parm, best_parent);
+       /* Divider is set to (field value + 1), hence the decrement */
+       SET_PARM_VALUE(priv, div->parm, best_div_val - 1);
+
+       return 0;
+}
+
+static ulong meson_clk_set_rate_by_id(struct clk *clk, unsigned int id, ulong rate);
+
+static ulong meson_mux_set_rate(struct clk *clk, unsigned long id, ulong rate)
+{
+       int i;
+       ulong ret = -EINVAL;
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+       const struct meson_clk_info *info;
+
+       info = meson_clk_get_info(clk, id, MESON_CLK_MUX);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       for (i = 0; i < (1 << info->parm->width); i++) {
+               ret = meson_clk_set_rate_by_id(clk, info->parents[i], rate);
+               if (!ret) {
+                       SET_PARM_VALUE(priv, info->parm, i);
+                       break;
+               }
+       }
+
+       return ret;
+}
+
+/* Rate propagation is implemented for a subcection of a clock tree, that is
+ * required at boot stage.
+ */
+static ulong meson_clk_set_rate_by_id(struct clk *clk, unsigned int id, ulong rate)
+{
+       switch (id) {
+       case CLKID_SPIFC_DIV:
+       case CLKID_USB_BUS_DIV:
+               return meson_composite_set_rate(clk, id, rate);
+       case CLKID_SPIFC:
+       case CLKID_USB_BUS: {
+               unsigned long parent = meson_clk_get_parent(clk, id);
+
+               return meson_clk_set_rate_by_id(clk, parent, rate);
+       }
+       case CLKID_SPIFC_SEL2:
+               return meson_mux_set_rate(clk, id, rate);
+       }
+
+       return -EINVAL;
+}
+
+static ulong meson_clk_set_rate(struct clk *clk, ulong rate)
+{
+       return meson_clk_set_rate_by_id(clk, clk->id, rate);
+}
+
+static int meson_mux_set_parent_by_id(struct clk *clk, unsigned int parent_id)
+{
+       unsigned int i, parent_index;
+       struct meson_clk *priv = dev_get_priv(clk->dev);
+       const struct meson_clk_info *info;
+
+       info = meson_clk_get_info(clk, clk->id, MESON_CLK_MUX);
+       if (IS_ERR(info))
+               return PTR_ERR(info);
+
+       parent_index = -EINVAL;
+       for (i = 0; i < (1 << info->parm->width); i++) {
+               if (parent_id == info->parents[i]) {
+                       parent_index = i;
+                       break;
+               }
+       }
+
+       if (IS_ERR_VALUE(parent_index))
+               return parent_index;
+
+       SET_PARM_VALUE(priv, info->parm, parent_index);
+
+       return 0;
+}
+
+static int meson_clk_set_parent(struct clk *clk, struct clk *parent_clk)
+{
+       return meson_mux_set_parent_by_id(clk, parent_clk->id);
+}
+
+static struct clk_ops meson_clk_ops = {
+       .disable        = meson_clk_disable,
+       .enable         = meson_clk_enable,
+       .get_rate       = meson_clk_get_rate,
+       .set_rate       = meson_clk_set_rate,
+       .set_parent     = meson_clk_set_parent,
+};
+
+static int meson_clk_probe(struct udevice *dev)
+{
+       struct meson_clk *priv = dev_get_priv(dev);
+
+       return regmap_init_mem(dev_ofnode(dev), &priv->map);
+}
+
+struct meson_clk_data meson_a1_peripherals_info = {
+       .clocks = meson_clocks,
+       .num_clocks = ARRAY_SIZE(meson_clocks),
+};
+
+struct meson_clk_data meson_a1_pll_info = {
+       .clocks = meson_pll_clocks,
+       .num_clocks = ARRAY_SIZE(meson_pll_clocks),
+};
+
+static const struct udevice_id meson_clk_ids[] = {
+       {
+               .compatible = "amlogic,a1-peripherals-clkc",
+               .data = (ulong)&meson_a1_peripherals_info,
+       },
+       {
+               .compatible = "amlogic,a1-pll-clkc",
+               .data = (ulong)&meson_a1_pll_info,
+       },
+       { }
+};
+
+U_BOOT_DRIVER(meson_clk) = {
+       .name           = "meson-clk-a1",
+       .id             = UCLASS_CLK,
+       .of_match       = meson_clk_ids,
+       .priv_auto      = sizeof(struct meson_clk),
+       .ops            = &meson_clk_ops,
+       .probe          = meson_clk_probe,
+};
+
+static const char *meson_clk_get_name(struct clk *clk, int id)
+{
+       const struct meson_clk_info *info;
+
+       info = meson_clk_get_info(clk, id, MESON_CLK_ANY);
+
+       return IS_ERR(info) ? "unknown" : info->name;
+}
+
+static int meson_clk_dump(struct clk *clk)
+{
+       const struct meson_clk_info *info;
+       struct meson_clk *priv;
+       unsigned long rate;
+       char *state, frequency[80];
+       int parent;
+
+       priv = dev_get_priv(clk->dev);
+
+       info = meson_clk_get_info(clk, clk->id, MESON_CLK_ANY);
+       if (IS_ERR(info) || !info->name)
+               return -EINVAL;
+
+       rate = clk_get_rate(clk);
+       if (IS_ERR_VALUE(rate))
+               sprintf(frequency, "unknown");
+       else
+               sprintf(frequency, "%lu", rate);
+
+       if (info->type == MESON_CLK_GATE)
+               state = GET_PARM_VALUE(priv, info->parm) ? "enabled" : "disabled";
+       else
+               state = "N/A";
+
+       parent = meson_clk_get_parent(clk, clk->id);
+       printf("%15s%20s%20s%15s\n",
+              info->name,
+              frequency,
+              meson_clk_get_name(clk, parent),
+              state);
+
+       return 0;
+}
+
+static int meson_clk_dump_dev(struct udevice *dev)
+{
+       int i;
+       struct meson_clk_data *data;
+       const char *sep = "--------------------";
+
+       printf("%s:\n", dev->name);
+       printf("%.15s%s%s%.15s\n", sep, sep, sep, sep);
+       printf("%15s%20s%20s%15s\n", "clk", "frequency", "parent", "state");
+       printf("%.15s%s%s%.15s\n", sep, sep, sep, sep);
+
+       data = (struct meson_clk_data *)dev_get_driver_data(dev);
+       for (i = 0; i < data->num_clocks; i++) {
+               meson_clk_dump(&(struct clk){
+                       .dev = dev,
+                       .id = i
+               });
+       }
+
+       return 0;
+}
+
+int soc_clk_dump(void)
+{
+       struct udevice *dev;
+       int i = 0;
+
+       while (!uclass_get_device(UCLASS_CLK, i++, &dev)) {
+               if (dev->driver == DM_DRIVER_GET(meson_clk)) {
+                       meson_clk_dump_dev(dev);
+                       printf("\n");
+               }
+       }
+
+       return 0;
+}