linux-dev/drivers/clk/sunxi-ng/Makefile, branch master

clk: sunxi-ng: Add support for the sun6i RTC clocks

2022-03-23T18:58:38Z

The RTC power domain in sun6i and newer SoCs manages the 16 MHz RC oscillator (called "IOSC" or "osc16M") and the optional 32 kHz crystal oscillator (called "LOSC" or "osc32k"). Starting with the H6, this power domain also handles the 24 MHz DCXO (called variously "HOSC", "dcxo24M", or "osc24M") as well. The H6 also adds a calibration circuit for IOSC. Later SoCs introduce further variations on the design: - H616 adds an additional mux for the 32 kHz fanout source. - R329 adds an additional mux for the RTC timekeeping clock, a clock for the SPI bus between power domains inside the RTC, and removes the IOSC calibration functionality. Take advantage of the CCU framework to handle this increased complexity. This driver is intended to be a drop-in replacement for the existing RTC clock provider. So some runtime adjustment of the clock parents is needed, both to handle hardware differences, and to support the old binding which omitted some of the input clocks. Signed-off-by: Samuel Holland Acked-by: Stephen Boyd Signed-off-by: Alexandre Belloni Link: https://lore.kernel.org/r/20220203021736.13434-6-samuel@sholland.org

clk: sunxi-ng: Add support for the D1 SoC clocks

2021-11-23T09:29:05Z

The D1 SoC contains a CCU and a R_CCU (PRCM CCU). Add support for them. Signed-off-by: Samuel Holland Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20211119043545.4010-7-samuel@sholland.org

clk: sunxi-ng: Allow the CCU core to be built as a module

2021-11-23T09:29:05Z

Like the individual CCU drivers, it can be beneficial for memory consumption of cross-platform configurations to only load the CCU core on the relevant platform. For example, a generic arm64 kernel sees the following improvement when building the CCU core and drivers as modules: before: text data bss dec hex filename 13882360 5251670 360800 19494830 12977ae vmlinux after: text data bss dec hex filename 13734787 5086442 360800 19182029 124b1cd vmlinux So the result is a 390KB total reduction in kernel image size. The one early clock provider (sun5i) requires the core to be built in. Now that loading the MMC driver will trigger loading the CCU core, the MMC timing mode functions do not need a compile-time fallback. Signed-off-by: Samuel Holland Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20211119033338.25486-5-samuel@sholland.org

clk: sunxi-ng: Allow drivers to be built as modules

2021-11-22T09:02:21Z

While it is useful to build all of the CCU drivers at once, only 1-3 of them will be loaded at a time, or possibly none of them if the kernel is booted on a non-sunxi platform. These CCU drivers are relatively large; 32-bit drivers have 30-50k of data each, while the 64-bit ones are 50-75k due to the increased pointer overhead. About half of that data comes from relocations. Let's allow the user to build these drivers as modules so only the necessary data is loaded. As a first step, convert the CCUs that are already platform drivers. When the drivers are built as modules, normally the file name becomes the module name. However, the current file names are inconsistent with the - name used everywhere else: the devicetree bindings, the platform driver names, and the Kconfig symbols. Use Makfile logic to rename the modules so they follow the usual pattern. Signed-off-by: Samuel Holland Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20211119033338.25486-3-samuel@sholland.org

clk: sunxi-ng: Add support for the Allwinner H616 CCU

2021-01-28T10:14:35Z

While the clocks are fairly similar to the H6, many differ in tiny details, so a separate clock driver seems indicated. Derived from the H6 clock driver, and adjusted according to the manual. Signed-off-by: Andre Przywara Acked-by: Maxime Ripard Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20210127172500.13356-4-andre.przywara@arm.com

clk: sunxi-ng: add support for the Allwinner A100 CCU

2020-08-25T08:52:18Z

Add support for a100 in the sunxi-ng CCU framework. Signed-off-by: Yangtao Li Signed-off-by: Maxime Ripard Acked-by: Rob Herring Link: https://lore.kernel.org/r/1eb41bf6c966a0e54820200650d27a5d4f2ac160.1595572867.git.frank@allwinnertech.com

clk: sunxi-ng: add support for suniv F1C100s SoC

2018-12-04T07:41:13Z

The suniv F1C100s SoC (the chip in some new F-series products of Allwinner) has a CCU which seems to be a stripped version of the CCU in SoCs after sun6i. Add support for the CCU. Signed-off-by: Mesih Kilinc Acked-by: Maxime Ripard Signed-off-by: Maxime Ripard

clk: sunxi-ng: replace lib-y with obj-y

2018-06-21T15:17:56Z

We had commit 06e226c7fb23 ("clk: sunxi-ng: Move all clock types to a library") and commit 799c43415442 ("kbuild: thin archives make default for all archs") in the same development cycle, from different trees. With migration to the thin archive, the entire drivers/clk/sunxi-ng/lib.a is linked to the vmlinux. This does not break build, but we do not get any size saving. However, we do not need to go back to the individual Kconfig options. The default configuration pulls in all (or most) of the CCU parts anyway. Also, once we enable CONFIG_LD_DEAD_CODE_DATA_ELIMINATION, we can simply list all files with obj-y, and the linker will drop all unused functions by itself. After the long discussion [1], people there agreed to fix this, but nobody sent a patch after all. I am doing it now. I lifted up CONFIG_SUNXI_CCU to drivers/clk/Makefile because everything in drivers/clk/sunxi-ng/ depends on SUNXI_CCU. [1] https://patchwork.kernel.org/patch/9796521/ Signed-off-by: Masahiro Yamada Acked-by: Stephen Boyd Signed-off-by: Maxime Ripard Acked-by: Chen-Yu Tsai Signed-off-by: Stephen Boyd

clk: sunxi-ng: add support for H6 PRCM CCU

2018-05-04T15:05:46Z

The H6 has clock/reset controls in PRCM part, like old SoCs such as H3 and A64. However, the PRCM CCU is rearranged; the register arragement is now similar to the main CCU of H6, and the PRCM now has two APB buses to control -- one is clocked from AHB clock derivde from AR100 clock, the other is clocked from the same mux with AR100 clock. Therefore a new driver is written for it. As there's no official document about the PRCM in H6, all the information are indirectly collected from BSP and parts of the document, and the information source is noted as comments in the driver's source code. If reliable information is provided furtherly, the driver needs to be rechecked. Signed-off-by: Icenowy Zheng Signed-off-by: Maxime Ripard

clk: sunxi-ng: add support for the Allwinner H6 CCU

2018-03-18T20:17:07Z

The Allwinner H6 SoC has a CCU which has been largely rearranged. Add support for it in the sunxi-ng CCU framework. Signed-off-by: Icenowy Zheng Acked-by: Maxime Ripard Signed-off-by: Maxime Ripard