On Sun, 7 Feb 2021 23:57:19 -0600 Samuel Holland samuel@sholland.org wrote:
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 samuel@sholland.org
Reviewed-by: Andre Przywara andre.przywara@arm.com
Queued for sunxi-next.
Cheers, Andre
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
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile index 0dfc0593fb1..4f9282a8b9b 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 00000000000..0c280d221ba --- /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 samuel@sholland.org
- */
+#include <clk-uclass.h> +#include <dm.h>
+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,
+};