0fce2e02a2
The new OST has one global timer and two or four percpu timers, so there will be three combinations in the upcoming new OST driver: the original GLOBAL_TIMER + PERCPU_TIMER, the new GLOBAL_TIMER + PERCPU_TIMER0/1 and GLOBAL_TIMER + PERCPU_TIMER0/1/2/3, For this, add the macro definition about OST_CLK_PERCPU_TIMER0/1/2/3. And in order to ensure that all the combinations work normally, the original ABI values of OST_CLK_PERCPU_TIMER and OST_CLK_GLOBAL_TIMER need to be exchanged to ensure that in any combinations, the clock can be registered (by calling clk_hw_register()) from index 0. Before this patch, OST_CLK_PERCPU_TIMER and OST_CLK_GLOBAL_TIMER are only used in two places, one is when using "assigned-clocks" to configure the clocks in the DTS file; the other is when registering the clocks in the sysost driver. When the values of these two ABIs are exchanged, the ABI value used by sysost driver when registering the clock, and the ABI value used by DTS when configuring the clock using "assigned-clocks" will also change accordingly. Therefore, there is no situation that causes the wrong clock to the configured. Therefore, exchanging ABI values will not cause errors in the existing codes when registering and configuring the clocks. Currently, in the mainline, only X1000 and X1830 are using sysost driver, and the upcoming X2000 will also use sysost driver. This patch has been tested on all three SoCs and all works fine. Tested-by: 周正 (Zhou Zheng) <sernia.zhou@foxmail.com> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20201026155842.10196-2-zhouyanjie@wanyeetech.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.