clk: sunxi: Add Allwinner V3S CLK driver

Add initial clock driver for Allwinner V3S.

- Implement USB bus and USB clocks via ccu_clk_gate table
  for V3S, 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 V3S, 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>

drivers/clk/sunxi/Kconfig

@@ -51,6 +51,13 @@ config CLK_SUN8I_R40
 	  This enables common clock driver support for platforms based
 	  on Allwinner R40 SoC.
 
+config CLK_SUN8I_V3S
+	bool "Clock driver for Allwinner V3S"
+	default MACH_SUN8I_V3S
+	help
+	  This enables common clock driver support for platforms based
+	  on Allwinner V3S SoC.
+
 config CLK_SUN8I_H3
 	bool "Clock driver for Allwinner H3/H5"
 	default MACH_SUNXI_H3_H5

drivers/clk/sunxi/Makefile

@@ -12,5 +12,6 @@ obj-$(CONFIG_CLK_SUN6I_A31) += clk_a31.o
 obj-$(CONFIG_CLK_SUN8I_A23) += clk_a23.o
 obj-$(CONFIG_CLK_SUN8I_A83T) += clk_a83t.o
 obj-$(CONFIG_CLK_SUN8I_R40) += clk_r40.o
+obj-$(CONFIG_CLK_SUN8I_V3S) += clk_v3s.o
 obj-$(CONFIG_CLK_SUN8I_H3) += clk_h3.o
 obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o

drivers/clk/sunxi/clk_v3s.c

@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2018 Amarula Solutions.
+ * 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-v3s-ccu.h>
+#include <dt-bindings/reset/sun8i-v3s-ccu.h>
+
+static struct ccu_clk_gate v3s_gates[] = {
+	[CLK_BUS_OTG]		= GATE(0x060, BIT(24)),
+
+	[CLK_USB_PHY0]          = GATE(0x0cc, BIT(8)),
+};
+
+static struct ccu_reset v3s_resets[] = {
+	[RST_USB_PHY0]		= RESET(0x0cc, BIT(0)),
+
+	[RST_BUS_OTG]		= RESET(0x2c0, BIT(24)),
+};
+
+static const struct ccu_desc v3s_ccu_desc = {
+	.gates = v3s_gates,
+	.resets = v3s_resets,
+};
+
+static int v3s_clk_bind(struct udevice *dev)
+{
+	return sunxi_reset_bind(dev, ARRAY_SIZE(v3s_resets));
+}
+
+static const struct udevice_id v3s_clk_ids[] = {
+	{ .compatible = "allwinner,sun8i-v3s-ccu",
+	  .data = (ulong)&v3s_ccu_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sun8i_v3s) = {
+	.name		= "sun8i_v3s_ccu",
+	.id		= UCLASS_CLK,
+	.of_match	= v3s_clk_ids,
+	.priv_auto_alloc_size	= sizeof(struct ccu_priv),
+	.ops		= &sunxi_clk_ops,
+	.probe		= sunxi_clk_probe,
+	.bind		= v3s_clk_bind,
+};