clk: sunxi: Add Allwinner A23/A33 CLK driver

Add initial clock driver for Allwinner A23/A33.

- Implement USB bus and USB clocks via ccu_clk_gate table
  for A23/A33, so it can accessed in common clk enable and
  disable functions from clk_sunxi.c
- Implement USB bus and USB resets via ccu_reset table
  for A23/A33, so it can accessed in common reset deassert
  and assert functions from reset-sunxi.c

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>

3 files changed, 71 insertions, 0 deletions

diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
index 535b0dc02c..38ff99d345 100644
--- a/drivers/clk/sunxi/Kconfig
+++ b/drivers/clk/sunxi/Kconfig
@@ -30,6 +30,13 @@ config CLK_SUN6I_A31
 	  This enables common clock driver support for platforms based
 	  on Allwinner A31/A31s SoC.
 
+config CLK_SUN8I_A23
+	bool "Clock driver for Allwinner A23/A33"
+	default MACH_SUN8I_A23 || MACH_SUN8I_A33
+	help
+	  This enables common clock driver support for platforms based
+	  on Allwinner A23/A33 SoC.
+
 config CLK_SUN8I_H3
 	bool "Clock driver for Allwinner H3/H5"
 	default MACH_SUNXI_H3_H5
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
index 3cf0071b0c..6924897036 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -9,5 +9,6 @@ obj-$(CONFIG_CLK_SUNXI) += clk_sunxi.o
 obj-$(CONFIG_CLK_SUN4I_A10) += clk_a10.o
 obj-$(CONFIG_CLK_SUN5I_A10S) += clk_a10s.o
 obj-$(CONFIG_CLK_SUN6I_A31) += clk_a31.o
+obj-$(CONFIG_CLK_SUN8I_A23) += clk_a23.o
 obj-$(CONFIG_CLK_SUN8I_H3) += clk_h3.o
 obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o
diff --git a/drivers/clk/sunxi/clk_a23.c b/drivers/clk/sunxi/clk_a23.c
new file mode 100644
index 0000000000..2a504ebdad
--- /dev/null
+++ b/drivers/clk/sunxi/clk_a23.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2018 Amarula Solutions B.V.
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/arch/ccu.h>
+#include <dt-bindings/clock/sun8i-a23-a33-ccu.h>
+#include <dt-bindings/reset/sun8i-a23-a33-ccu.h>
+
+static struct ccu_clk_gate a23_gates[] = {
+	[CLK_BUS_OTG]		= GATE(0x060, BIT(24)),
+	[CLK_BUS_EHCI]		= GATE(0x060, BIT(26)),
+	[CLK_BUS_OHCI]		= GATE(0x060, BIT(29)),
+
+	[CLK_USB_PHY0]		= GATE(0x0cc, BIT(8)),
+	[CLK_USB_PHY1]		= GATE(0x0cc, BIT(9)),
+	[CLK_USB_HSIC]		= GATE(0x0cc, BIT(10)),
+	[CLK_USB_HSIC_12M]	= GATE(0x0cc, BIT(11)),
+	[CLK_USB_OHCI]		= GATE(0x0cc, BIT(16)),
+};
+
+static struct ccu_reset a23_resets[] = {
+	[RST_USB_PHY0]		= RESET(0x0cc, BIT(0)),
+	[RST_USB_PHY1]		= RESET(0x0cc, BIT(1)),
+	[RST_USB_HSIC]		= RESET(0x0cc, BIT(2)),
+
+	[RST_BUS_OTG]		= RESET(0x2c0, BIT(24)),
+	[RST_BUS_EHCI]		= RESET(0x2c0, BIT(26)),
+	[RST_BUS_OHCI]		= RESET(0x2c0, BIT(29)),
+};
+
+static const struct ccu_desc a23_ccu_desc = {
+	.gates = a23_gates,
+	.resets = a23_resets,
+};
+
+static int a23_clk_bind(struct udevice *dev)
+{
+	return sunxi_reset_bind(dev, ARRAY_SIZE(a23_resets));
+}
+
+static const struct udevice_id a23_clk_ids[] = {
+	{ .compatible = "allwinner,sun8i-a23-ccu",
+	  .data = (ulong)&a23_ccu_desc },
+	{ .compatible = "allwinner,sun8i-a33-ccu",
+	  .data = (ulong)&a23_ccu_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sun8i_a23) = {
+	.name		= "sun8i_a23_ccu",
+	.id		= UCLASS_CLK,
+	.of_match	= a23_clk_ids,
+	.priv_auto_alloc_size	= sizeof(struct ccu_priv),
+	.ops		= &sunxi_clk_ops,
+	.probe		= sunxi_clk_probe,
+	.bind		= a23_clk_bind,
+};