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

André Przywara
2019-01-10T23:55:23Z

On 10/01/2019 18:40, Jagan Teki wrote:
> 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>

Compared against the manual, boot tested on Pine H64.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>

Cheers,
Andre.

> ---
> 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,
> +};
>