diff mbox series

[U-Boot,v2,02/53] clk: Add Allwinner A64 CLK driver

Message ID 20180810060711.6547-3-jagan@amarulasolutions.com
State Superseded
Delegated to: Jagannadha Sutradharudu Teki
Headers show
Series clk: Add Allwinner CLK, RESET support | expand

Commit Message

Jagan Teki Aug. 10, 2018, 6:06 a.m. UTC 
Add initial clock driver for Allwinner A64.

Implement USB clock enable and disable functions for
OHCI, EHCI, OTG and USBPHY gate and clock registers.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
 arch/arm/include/asm/arch-sunxi/ccu.h | 47 ++++++++++++++++++++
 drivers/clk/Kconfig                   |  1 +
 drivers/clk/Makefile                  |  1 +
 drivers/clk/sunxi/Kconfig             | 18 ++++++++
 drivers/clk/sunxi/Makefile            |  9 ++++
 drivers/clk/sunxi/clk_a64.c           | 62 +++++++++++++++++++++++++++
 drivers/clk/sunxi/clk_sunxi.c         | 58 +++++++++++++++++++++++++
 7 files changed, 196 insertions(+)
 create mode 100644 arch/arm/include/asm/arch-sunxi/ccu.h
 create mode 100644 drivers/clk/sunxi/Kconfig
 create mode 100644 drivers/clk/sunxi/Makefile
 create mode 100644 drivers/clk/sunxi/clk_a64.c
 create mode 100644 drivers/clk/sunxi/clk_sunxi.c
diff mbox series

Patch

diff --git a/arch/arm/include/asm/arch-sunxi/ccu.h b/arch/arm/include/asm/arch-sunxi/ccu.h
new file mode 100644
index 0000000000..f628c893de
--- /dev/null
+++ b/arch/arm/include/asm/arch-sunxi/ccu.h
@@ -0,0 +1,47 @@ 
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (C) 2018 Amarula Solutions.
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ */
+
+#ifndef _ASM_ARCH_CCU_H
+#define _ASM_ARCH_CCU_H
+
+/**
+ * ccu_clk_map - common clock unit clock map
+ *
+ * @off:		ccu clock offset
+ * @bit:		ccu clock bit value
+ * @ccu_clk_set_rate:	ccu clock set rate func
+ */
+struct ccu_clk_map {
+	u16 off;
+	u32 bit;
+	int (*ccu_clk_set_rate)(void *base, u32 bit, ulong rate);
+};
+
+/**
+ * struct ccu_desc - common clock unit descriptor
+ *
+ * @clks:		mapping clocks descriptor
+ * @num_clks:		number of mapped clocks
+ */
+struct ccu_desc {
+	struct ccu_clk_map *clks;
+	unsigned long num_clks;
+};
+
+/**
+ * struct sunxi_clk_priv - sunxi clock private structure
+ *
+ * @base:	base address
+ * @desc:	ccu descriptor
+ */
+struct sunxi_clk_priv {
+	void *base;
+	const struct ccu_desc *desc;
+};
+
+extern struct clk_ops sunxi_clk_ops;
+
+#endif /* _ASM_ARCH_CCU_H */
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index a99abed9e9..b4992e9ff1 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -88,6 +88,7 @@  source "drivers/clk/exynos/Kconfig"
 source "drivers/clk/mvebu/Kconfig"
 source "drivers/clk/owl/Kconfig"
 source "drivers/clk/renesas/Kconfig"
+source "drivers/clk/sunxi/Kconfig"
 source "drivers/clk/tegra/Kconfig"
 source "drivers/clk/uniphier/Kconfig"
 
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index 146283c723..7cefcd99a0 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -11,6 +11,7 @@  obj-y += tegra/
 obj-$(CONFIG_ARCH_ASPEED) += aspeed/
 obj-$(CONFIG_ARCH_MESON) += clk_meson.o
 obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
+obj-$(CONFIG_ARCH_SUNXI) += sunxi/
 obj-$(CONFIG_CLK_AT91) += at91/
 obj-$(CONFIG_CLK_MVEBU) += mvebu/
 obj-$(CONFIG_CLK_BCM6345) += clk_bcm6345.o
diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
new file mode 100644
index 0000000000..bf5ecb3801
--- /dev/null
+++ b/drivers/clk/sunxi/Kconfig
@@ -0,0 +1,18 @@ 
+config CLK_SUNXI
+	bool "Clock support for Allwinner SoCs"
+	depends on CLK && ARCH_SUNXI
+	default y
+	help
+	  This enables support for common clock driver API on Allwinner
+	  SoCs.
+
+if CLK_SUNXI
+
+config CLK_SUN50I_A64
+	bool "Clock driver for Allwinner A64"
+	default MACH_SUN50I
+	help
+	  This enables common clock driver support for platforms based
+	  on Allwinner A64 SoC.
+
+endif # CLK_SUNXI
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
new file mode 100644
index 0000000000..fb20d28333
--- /dev/null
+++ b/drivers/clk/sunxi/Makefile
@@ -0,0 +1,9 @@ 
+#
+# Copyright (C) 2018 Amarula Solutions.
+#
+# SPDX-License-Identifier:      GPL-2.0+
+#
+
+obj-$(CONFIG_CLK_SUNXI) += clk_sunxi.o
+
+obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o
diff --git a/drivers/clk/sunxi/clk_a64.c b/drivers/clk/sunxi/clk_a64.c
new file mode 100644
index 0000000000..9393a01ccf
--- /dev/null
+++ b/drivers/clk/sunxi/clk_a64.c
@@ -0,0 +1,62 @@ 
+// 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/sun50i-a64-ccu.h>
+
+static struct ccu_clk_map a64_clks[] = {
+	[CLK_BUS_OTG]		= { 0x060, BIT(23), NULL },
+	[CLK_BUS_EHCI0]		= { 0x060, BIT(24), NULL },
+	[CLK_BUS_EHCI1]		= { 0x060, BIT(25), NULL },
+	[CLK_BUS_OHCI0]		= { 0x060, BIT(28), NULL },
+	[CLK_BUS_OHCI1]		= { 0x060, BIT(29), NULL },
+
+	[CLK_USB_PHY0]		= { 0x0cc, BIT(8), NULL },
+	[CLK_USB_PHY1]		= { 0x0cc, BIT(9), NULL },
+	[CLK_USB_HSIC]		= { 0x0cc, BIT(10), NULL },
+	[CLK_USB_HSIC_12M]	= { 0x0cc, BIT(11), NULL },
+	[CLK_USB_OHCI0]		= { 0x0cc, BIT(16), NULL },
+	[CLK_USB_OHCI1]		= { 0x0cc, BIT(17), NULL },
+};
+
+static const struct ccu_desc sun50i_a64_ccu_desc = {
+	.clks = a64_clks,
+	.num_clks = ARRAY_SIZE(a64_clks),
+};
+
+static int a64_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 const struct udevice_id a64_clk_ids[] = {
+	{ .compatible = "allwinner,sun50i-a64-ccu",
+	  .data = (ulong)&sun50i_a64_ccu_desc },
+	{ }
+};
+
+U_BOOT_DRIVER(clk_sun50i_a64) = {
+	.name		= "sun50i_a64_ccu",
+	.id		= UCLASS_CLK,
+	.of_match	= a64_clk_ids,
+	.priv_auto_alloc_size	= sizeof(struct sunxi_clk_priv),
+	.ops		= &sunxi_clk_ops,
+	.probe		= a64_clk_probe,
+};
diff --git a/drivers/clk/sunxi/clk_sunxi.c b/drivers/clk/sunxi/clk_sunxi.c
new file mode 100644
index 0000000000..791b1ac7f2
--- /dev/null
+++ b/drivers/clk/sunxi/clk_sunxi.c
@@ -0,0 +1,58 @@ 
+// 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/io.h>
+#include <asm/arch/ccu.h>
+#include <linux/log2.h>
+
+static int sunxi_clk_enable(struct clk *clk)
+{
+	struct sunxi_clk_priv *priv = dev_get_priv(clk->dev);
+	struct ccu_clk_map *map = &priv->desc->clks[clk->id];
+	u32 reg;
+
+	if (!map->off || !map->bit) {
+		debug("%s (CLK#%ld) unhandled\n", __func__, clk->id);
+		return 0;
+	}
+
+	debug("%s(#%ld) off#0x%x, BIT(%d)\n", __func__,
+	      clk->id, map->off, ilog2(map->bit));
+
+	reg = readl(priv->base + map->off);
+	writel(reg | map->bit, priv->base + map->off);
+
+	return 0;
+}
+
+static int sunxi_clk_disable(struct clk *clk)
+{
+	struct sunxi_clk_priv *priv = dev_get_priv(clk->dev);
+	struct ccu_clk_map *map = &priv->desc->clks[clk->id];
+	u32 reg;
+
+	if (!map->off || !map->bit) {
+		debug("%s (CLK#%ld) unhandled\n", __func__, clk->id);
+		return 0;
+	}
+
+	debug("%s(#%ld) off#0x%x, BIT(%d)\n", __func__,
+	      clk->id, map->off, ilog2(map->bit));
+
+	reg = readl(priv->base + map->off);
+	writel(reg & ~map->bit, priv->base + map->off);
+
+	return 0;
+}
+
+struct clk_ops sunxi_clk_ops = {
+	.enable = sunxi_clk_enable,
+	.disable = sunxi_clk_disable,
+};