clk: sunxi: Add a driver for the legacy A31/A23/A33 PRCM

Signed-off-by: Samuel Holland <samuel@sholland.org>

drivers/clk/sunxi/Kconfig

@@ -38,12 +38,21 @@ config CLK_SUN6I_A31
 	  This enables common clock driver support for platforms based
 	  on Allwinner A31/A31s SoC.
 
+config CLK_SUN6I_A31_APB0
+	bool "Clock driver for Allwinner A31 generation PRCM (legacy)"
+	default MACH_SUN6I || MACH_SUN8I_A23 || MACH_SUN8I_A33
+	help
+	  This enables common clock driver support for the PRCM
+	  in Allwinner A31/A31s/A23/A33 SoCs using the legacy PRCM
+	  MFD binding.
+
 config CLK_SUN6I_A31_R
-	bool "Clock driver for Allwinner A31 generation PRCM"
+	bool "Clock driver for Allwinner A31 generation PRCM (CCU)"
 	default SUNXI_GEN_SUN6I
 	help
 	  This enables common clock driver support for the PRCM
-	  in Allwinner A31/A31s/A23/A33/A83T/H3/A64/H5 SoCs.
+	  in Allwinner A31/A31s/A23/A33/A83T/H3/A64/H5 SoCs using
+	  the new CCU binding.
 
 config CLK_SUN8I_A23
 	bool "Clock driver for Allwinner A23/A33"

drivers/clk/sunxi/Makefile

@@ -12,6 +12,7 @@ obj-$(CONFIG_CLK_SUNIV_F1C100S) += clk_f1c100s.o
 obj-$(CONFIG_CLK_SUN4I_A10) += clk_a10.o
 obj-$(CONFIG_CLK_SUN5I_A10S) += clk_a10s.o
 obj-$(CONFIG_CLK_SUN6I_A31) += clk_a31.o
+obj-$(CONFIG_CLK_SUN6I_A31_APB0) += clk_a31_apb0.o
 obj-$(CONFIG_CLK_SUN6I_A31_R) += clk_a31_r.o
 obj-$(CONFIG_CLK_SUN8I_A23) += clk_a23.o
 obj-$(CONFIG_CLK_SUN8I_A83T) += clk_a83t.o

drivers/clk/sunxi/clk_a31_apb0.c

@@ -0,0 +1,97 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) Samuel Holland <samuel@sholland.org>
+ */
+
+#include <clk-uclass.h>
+#include <dm.h>
+#include <clk/sunxi.h>
+#include <linux/bitops.h>
+
+static struct ccu_clk_gate sun6i_apb0_gates[] = {
+	[0]	= GATE(0x028, BIT(0)),
+	[1]	= GATE(0x028, BIT(1)),
+	[2]	= GATE(0x028, BIT(2)),
+	[3]	= GATE(0x028, BIT(3)),
+	[4]	= GATE(0x028, BIT(4)),
+	[5]	= GATE(0x028, BIT(5)),
+	[6]	= GATE(0x028, BIT(6)),
+	[7]	= GATE(0x028, BIT(7)),
+};
+
+static struct ccu_reset sun6i_apb0_resets[] = {
+	[0]	= RESET(0x0b0, BIT(0)),
+	[1]	= RESET(0x0b0, BIT(1)),
+	[2]	= RESET(0x0b0, BIT(2)),
+	[3]	= RESET(0x0b0, BIT(3)),
+	[4]	= RESET(0x0b0, BIT(4)),
+	[5]	= RESET(0x0b0, BIT(5)),
+	[6]	= RESET(0x0b0, BIT(6)),
+	[7]	= RESET(0x0b0, BIT(7)),
+};
+
+const struct ccu_desc sun6i_apb0_clk_desc = {
+	.gates = sun6i_apb0_gates,
+	.resets = sun6i_apb0_resets,
+	.num_gates = ARRAY_SIZE(sun6i_apb0_gates),
+	.num_resets = ARRAY_SIZE(sun6i_apb0_resets),
+};
+
+static int sun6i_apb0_of_to_plat(struct udevice *dev)
+{
+	struct ccu_plat *plat = dev_get_plat(dev);
+
+	plat->base = dev_read_addr_ptr(dev->parent);
+	if (!plat->base)
+		return -ENOMEM;
+
+	plat->desc = (const struct ccu_desc *)dev_get_driver_data(dev);
+	if (!plat->desc)
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct udevice_id sun6i_apb0_clk_ids[] = {
+	{ .compatible = "allwinner,sun6i-a31-apb0-gates-clk",
+	  .data = (ulong)&sun6i_apb0_clk_desc },
+	{ .compatible = "allwinner,sun8i-a23-apb0-gates-clk",
+	  .data = (ulong)&sun6i_apb0_clk_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(sun6i_apb0_clk) = {
+	.name		= "sun6i_apb0_clk",
+	.id		= UCLASS_CLK,
+	.of_match	= sun6i_apb0_clk_ids,
+	.of_to_plat	= sun6i_apb0_of_to_plat,
+	.plat_auto	= sizeof(struct ccu_plat),
+	.ops		= &sunxi_clk_ops,
+};
+
+static const struct udevice_id sun6i_apb0_reset_ids[] = {
+	{ .compatible = "allwinner,sun6i-a31-clock-reset",
+	  .data = (ulong)&sun6i_apb0_clk_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(sun6i_apb0_reset) = {
+	.name		= "sun6i_apb0_reset",
+	.id		= UCLASS_RESET,
+	.of_match	= sun6i_apb0_reset_ids,
+	.of_to_plat	= sun6i_apb0_of_to_plat,
+	.plat_auto	= sizeof(struct ccu_plat),
+	.ops		= &sunxi_reset_ops,
+};
+
+static const struct udevice_id sun6i_prcm_mfd_ids[] = {
+	{ .compatible = "allwinner,sun6i-a31-prcm" },
+	{ .compatible = "allwinner,sun8i-a23-prcm" },
+	{ }
+};
+
+U_BOOT_DRIVER(sun6i_prcm_mfd) = {
+	.name		= "sun6i_prcm_mfd",
+	.id		= UCLASS_SIMPLE_BUS,
+	.of_match	= sun6i_prcm_mfd_ids,
+};

include/clk/sunxi.h

@@ -86,5 +86,6 @@ struct ccu_plat {
 };
 
 extern struct clk_ops sunxi_clk_ops;
+extern struct reset_ops sunxi_reset_ops;
 
 #endif /* _CLK_SUNXI_H */