clk: sunxi: Add Allwinner R40 CLK driver

Add initial clock driver for Allwinner R40.

- Implement USB bus and USB clocks via ccu_clk_gate
  for R40, 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 R40, 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, 78 insertions, 0 deletions

diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
index 90af70d171..c45a4ba378 100644
--- a/drivers/clk/sunxi/Kconfig
+++ b/drivers/clk/sunxi/Kconfig
@@ -44,6 +44,13 @@ config CLK_SUN8I_A83T
 	  This enables common clock driver support for platforms based
 	  on Allwinner A83T SoC.
 
+config CLK_SUN8I_R40
+	bool "Clock driver for Allwinner R40"
+	default MACH_SUN8I_R40
+	help
+	  This enables common clock driver support for platforms based
+	  on Allwinner R40 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 4a254c8671..61f8b87396 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -11,5 +11,6 @@ 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_A83T) += clk_a83t.o
+obj-$(CONFIG_CLK_SUN8I_R40) += clk_r40.o
 obj-$(CONFIG_CLK_SUN8I_H3) += clk_h3.o
 obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o
diff --git a/drivers/clk/sunxi/clk_r40.c b/drivers/clk/sunxi/clk_r40.c
new file mode 100644
index 0000000000..cdf54da027
--- /dev/null
+++ b/drivers/clk/sunxi/clk_r40.c
@@ -0,0 +1,70 @@
+// 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-r40-ccu.h>
+#include <dt-bindings/reset/sun8i-r40-ccu.h>
+
+static struct ccu_clk_gate r40_gates[] = {
+	[CLK_BUS_OTG]		= GATE(0x060, BIT(25)),
+	[CLK_BUS_EHCI0]		= GATE(0x060, BIT(26)),
+	[CLK_BUS_EHCI1]		= GATE(0x060, BIT(27)),
+	[CLK_BUS_EHCI2]		= GATE(0x060, BIT(28)),
+	[CLK_BUS_OHCI0]		= GATE(0x060, BIT(29)),
+	[CLK_BUS_OHCI1]		= GATE(0x060, BIT(30)),
+	[CLK_BUS_OHCI2]		= GATE(0x060, BIT(31)),
+
+	[CLK_USB_PHY0]		= GATE(0x0cc, BIT(8)),
+	[CLK_USB_PHY1]		= GATE(0x0cc, BIT(9)),
+	[CLK_USB_PHY2]		= GATE(0x0cc, BIT(10)),
+	[CLK_USB_OHCI0]		= GATE(0x0cc, BIT(16)),
+	[CLK_USB_OHCI1]		= GATE(0x0cc, BIT(17)),
+	[CLK_USB_OHCI2]		= GATE(0x0cc, BIT(18)),
+};
+
+static struct ccu_reset r40_resets[] = {
+	[RST_USB_PHY0]		= RESET(0x0cc, BIT(0)),
+	[RST_USB_PHY1]		= RESET(0x0cc, BIT(1)),
+	[RST_USB_PHY2]		= RESET(0x0cc, BIT(2)),
+
+	[RST_BUS_OTG]		= RESET(0x2c0, BIT(25)),
+	[RST_BUS_EHCI0]		= RESET(0x2c0, BIT(26)),
+	[RST_BUS_EHCI1]		= RESET(0x2c0, BIT(27)),
+	[RST_BUS_EHCI2]		= RESET(0x2c0, BIT(28)),
+	[RST_BUS_OHCI0]		= RESET(0x2c0, BIT(29)),
+	[RST_BUS_OHCI1]		= RESET(0x2c0, BIT(30)),
+	[RST_BUS_OHCI2]		= RESET(0x2c0, BIT(31)),
+};
+
+static const struct ccu_desc r40_ccu_desc = {
+	.gates = r40_gates,
+	.resets = r40_resets,
+};
+
+static int r40_clk_bind(struct udevice *dev)
+{
+	return sunxi_reset_bind(dev, ARRAY_SIZE(r40_resets));
+}
+
+static const struct udevice_id r40_clk_ids[] = {
+	{ .compatible = "allwinner,sun8i-r40-ccu",
+	  .data = (ulong)&r40_ccu_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sun8i_r40) = {
+	.name		= "sun8i_r40_ccu",
+	.id		= UCLASS_CLK,
+	.of_match	= r40_clk_ids,
+	.priv_auto_alloc_size	= sizeof(struct ccu_priv),
+	.ops		= &sunxi_clk_ops,
+	.probe		= sunxi_clk_probe,
+	.bind		= r40_clk_bind,
+};