From 9078b67f3c968cbc3142432decc93a51780b4642 Mon Sep 17 00:00:00 2001 From: Samuel Holland Date: Sun, 7 Feb 2021 23:57:19 -0600 Subject: clk: sunxi: Add a dummy clock driver for the RTC The 32kHz clock ("LOSC") on sunxi SoCs is provided by the RTC. It is used, among other things, by the XHCI controller in the H6. To be able to call clk_get_bulk() on the XHCI controller, some device needs to provide all referenced clocks. Since LOSC is a fixed-rate always-on clock, implementation is trivial. Signed-off-by: Samuel Holland Reviewed-by: Andre Przywara Signed-off-by: Andre Przywara --- drivers/clk/sunxi/Makefile | 2 ++ drivers/clk/sunxi/clk_sun6i_rtc.c | 35 +++++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) create mode 100644 drivers/clk/sunxi/clk_sun6i_rtc.c (limited to 'drivers') diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile index 0dfc059..4f9282a 100644 --- a/drivers/clk/sunxi/Makefile +++ b/drivers/clk/sunxi/Makefile @@ -6,6 +6,8 @@ obj-$(CONFIG_CLK_SUNXI) += clk_sunxi.o +obj-$(CONFIG_CLK_SUNXI) += clk_sun6i_rtc.o + obj-$(CONFIG_CLK_SUN4I_A10) += clk_a10.o obj-$(CONFIG_CLK_SUN5I_A10S) += clk_a10s.o obj-$(CONFIG_CLK_SUN6I_A31) += clk_a31.o diff --git a/drivers/clk/sunxi/clk_sun6i_rtc.c b/drivers/clk/sunxi/clk_sun6i_rtc.c new file mode 100644 index 0000000..0c280d2 --- /dev/null +++ b/drivers/clk/sunxi/clk_sun6i_rtc.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Copyright (C) 2018 Amarula Solutions. + * Copyright (C) 2020 Samuel Holland + */ + +#include +#include + +static int clk_sun6i_rtc_enable(struct clk *clk) +{ + return 0; +} + +static const struct clk_ops clk_sun6i_rtc_ops = { + .enable = clk_sun6i_rtc_enable, +}; + +static const struct udevice_id sun6i_rtc_ids[] = { + { .compatible = "allwinner,sun6i-a31-rtc" }, + { .compatible = "allwinner,sun8i-a23-rtc" }, + { .compatible = "allwinner,sun8i-h3-rtc" }, + { .compatible = "allwinner,sun8i-r40-rtc" }, + { .compatible = "allwinner,sun8i-v3-rtc" }, + { .compatible = "allwinner,sun50i-h5-rtc" }, + { .compatible = "allwinner,sun50i-h6-rtc" }, + { } +}; + +U_BOOT_DRIVER(clk_sun6i_rtc) = { + .name = "clk_sun6i_rtc", + .id = UCLASS_CLK, + .of_match = sun6i_rtc_ids, + .ops = &clk_sun6i_rtc_ops, +}; -- cgit v1.1