[U-Boot] [PATCH v3 05/58] clk: sunxi: Add Allwinner A10/A20 CLK driver

[Jagan Teki]

Add initial clock driver for Allwinner A10/A20.

- Implement USB ahb and USB clocks via ccu_clk_map descriptor
  for A10/A20, so it can accessed in common clk enable and disable
  functions from clk_sunxi.c
- Implement USB resets via ccu_reset_map descriptor for A10/A20,
  so it can accessed in common reset deassert and assert functions
  from reset-sunxi.c

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 drivers/clk/sunxi/Kconfig   |  7 ++++
 drivers/clk/sunxi/Makefile  |  1 +
 drivers/clk/sunxi/clk_a10.c | 77 +++++++++++++++++++++++++++++++++++++
 3 files changed, 85 insertions(+)
 create mode 100644 drivers/clk/sunxi/clk_a10.c

diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
index c3713bbac2..fbbf94ef55 100644
--- a/drivers/clk/sunxi/Kconfig
+++ b/drivers/clk/sunxi/Kconfig
@@ -9,6 +9,13 @@ config CLK_SUNXI
 
 if CLK_SUNXI
 
+config CLK_SUN4I_A10
+	bool "Clock driver for Allwinner A10/A20"
+	default MACH_SUN4I || MACH_SUN7I
+	help
+	  This enables common clock driver support for platforms based
+	  on Allwinner A10/A20 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 dec49f27a1..bba830922f 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -6,5 +6,6 @@
 
 obj-$(CONFIG_CLK_SUNXI) += clk_sunxi.o
 
+obj-$(CONFIG_CLK_SUN4I_A10) += clk_a10.o
 obj-$(CONFIG_CLK_SUN8I_H3) += clk_h3.o
 obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o
diff --git a/drivers/clk/sunxi/clk_a10.c b/drivers/clk/sunxi/clk_a10.c
new file mode 100644
index 0000000000..7492e1367a
--- /dev/null
+++ b/drivers/clk/sunxi/clk_a10.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2018 Amarula Solutions.
+ * Author: Jagan Teki <jagan at amarulasolutions.com>
+ */
+
+#include <common.h>
+#include <clk-uclass.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/arch/ccu.h>
+#include <dt-bindings/clock/sun4i-a10-ccu.h>
+#include <dt-bindings/reset/sun4i-a10-ccu.h>
+
+static struct ccu_clk_map a10_clks[] = {
+	[CLK_AHB_OTG]		= { 0x060, BIT(0), NULL },
+	[CLK_AHB_EHCI0]		= { 0x060, BIT(1), NULL },
+	[CLK_AHB_OHCI0]		= { 0x060, BIT(2), NULL },
+	[CLK_AHB_EHCI1]		= { 0x060, BIT(3), NULL },
+	[CLK_AHB_OHCI1]		= { 0x060, BIT(4), NULL },
+
+	[CLK_USB_OHCI0]		= { 0x0cc, BIT(6), NULL },
+	[CLK_USB_OHCI1]		= { 0x0cc, BIT(7), NULL },
+	[CLK_USB_PHY]		= { 0x0cc, BIT(8), NULL },
+};
+
+static struct ccu_reset_map a10_resets[] = {
+	[RST_USB_PHY0]		= { 0x0cc, BIT(0) },
+	[RST_USB_PHY1]		= { 0x0cc, BIT(1) },
+	[RST_USB_PHY2]		= { 0x0cc, BIT(2) },
+};
+
+static const struct ccu_desc sun4i_a10_ccu_desc = {
+	.clks = a10_clks,
+	.num_clks = ARRAY_SIZE(a10_clks),
+
+	.resets = a10_resets,
+	.num_resets =  ARRAY_SIZE(a10_resets),
+};
+
+static int a10_clk_probe(struct udevice *dev)
+{
+	struct sunxi_clk_priv *priv = dev_get_priv(dev);
+
+	priv->base = dev_read_addr_ptr(dev);
+	if (!priv->base)
+		return -ENOMEM;
+
+	priv->desc = (const struct ccu_desc *)dev_get_driver_data(dev);
+	if (!priv->desc)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int a10_clk_bind(struct udevice *dev)
+{
+	return sunxi_reset_bind(dev, 22);
+}
+
+static const struct udevice_id a10_clk_ids[] = {
+	{ .compatible = "allwinner,sun4i-a10-ccu",
+          .data = (ulong)&sun4i_a10_ccu_desc },
+	{ .compatible = "allwinner,sun7i-a20-ccu",
+          .data = (ulong)&sun4i_a10_ccu_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sun4i_a10) = {
+	.name		= "sun4i_a10_ccu",
+	.id		= UCLASS_CLK,
+	.of_match	= a10_clk_ids,
+	.priv_auto_alloc_size	= sizeof(struct sunxi_clk_priv),
+	.ops		= &sunxi_clk_ops,
+	.probe		= a10_clk_probe,
+	.bind		= a10_clk_bind,
+};
-- 
2.18.0.321.gffc6fa0e3