[U-Boot] [PATCH v6 13/20] clk: sunxi: Add Allwinner H6 CLK driver

Jagan Teki
2019-01-10T18:40:09Z

Add initial clock driver for Allwinner H6.

- Implement UART bus clocks via ccu_clk_gate table for
H6, so it can accessed in common clk enable and disable
functions from clk_sunxi.c
- Implement UART bus resets via ccu_reset table for H6,
so it can accessed in common reset deassert and assert
functions from reset-sunxi.c

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
---
drivers/clk/sunxi/Kconfig | 7 +++++
drivers/clk/sunxi/Makefile | 1 +
drivers/clk/sunxi/clk_h6.c | 53 ++++++++++++++++++++++++++++++++++++++
3 files changed, 61 insertions(+)
create mode 100644 drivers/clk/sunxi/clk_h6.c

diff --git a/drivers/clk/sunxi/Kconfig b/drivers/clk/sunxi/Kconfig
index a6f84e9e56..cb11c7c21e 100644
--- a/drivers/clk/sunxi/Kconfig
+++ b/drivers/clk/sunxi/Kconfig
@@ -65,6 +65,13 @@ config CLK_SUN8I_H3
This enables common clock driver support for platforms based
on Allwinner H3/H5 SoC.

+config CLK_SUN50I_H6
+ bool "Clock driver for Allwinner H6"
+ default MACH_SUN50I_H6
+ help
+ This enables common clock driver support for platforms based
+ on Allwinner H6 SoC.
+
config CLK_SUN50I_A64
bool "Clock driver for Allwinner A64"
default MACH_SUN50I
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
index fbd43527a6..794aa2461c 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -14,4 +14,5 @@ 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-$(CONFIG_CLK_SUN50I_H6) += clk_h6.o
obj-$(CONFIG_CLK_SUN50I_A64) += clk_a64.o
diff --git a/drivers/clk/sunxi/clk_h6.c b/drivers/clk/sunxi/clk_h6.c
new file mode 100644
index 0000000000..0da3a40e3d
--- /dev/null
+++ b/drivers/clk/sunxi/clk_h6.c
@@ -0,0 +1,53 @@
+// 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-h6-ccu.h>
+#include <dt-bindings/reset/sun50i-h6-ccu.h>
+
+static struct ccu_clk_gate h6_gates[] = {
+ [CLK_BUS_UART0] = GATE(0x90c, BIT(0)),
+ [CLK_BUS_UART1] = GATE(0x90c, BIT(1)),
+ [CLK_BUS_UART2] = GATE(0x90c, BIT(2)),
+ [CLK_BUS_UART3] = GATE(0x90c, BIT(3)),
+};
+
+static struct ccu_reset h6_resets[] = {
+ [RST_BUS_UART0] = RESET(0x90c, BIT(16)),
+ [RST_BUS_UART1] = RESET(0x90c, BIT(17)),
+ [RST_BUS_UART2] = RESET(0x90c, BIT(18)),
+ [RST_BUS_UART3] = RESET(0x90c, BIT(19)),
+};
+
+static const struct ccu_desc h6_ccu_desc = {
+ .gates = h6_gates,
+ .resets = h6_resets,
+};
+
+static int h6_clk_bind(struct udevice *dev)
+{
+ return sunxi_reset_bind(dev, ARRAY_SIZE(h6_resets));
+}
+
+static const struct udevice_id h6_ccu_ids[] = {
+ { .compatible = "allwinner,sun50i-h6-ccu",
+ .data = (ulong)&h6_ccu_desc },
+ { }
+};
+
+U_BOOT_DRIVER(clk_sun50i_h6) = {
+ .name = "sun50i_h6_ccu",
+ .id = UCLASS_CLK,
+ .of_match = h6_ccu_ids,
+ .priv_auto_alloc_size = sizeof(struct ccu_priv),
+ .ops = &sunxi_clk_ops,
+ .probe = sunxi_clk_probe,
+ .bind = h6_clk_bind,
+};
--
2.18.0.321.gffc6fa0e3