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51996952b8
The GPIO controller available on RZ/G3S (but also on RZ/G2L) supports
setting the power source for Ethernet pins. Based on the interface b/w
the Ethernet controller and the Ethernet PHY, and on board design, a
specific power source needs to be selected. The GPIO controller
supports 1.8V, 2.5V, and 3.3V power source selection for the Ethernet
pins. This can be selected though the ETHx_POC registers (x={0, 1}).
Adjust the driver to support this, and to do proper instantiation for
the RZ/G3S and RZ/G2L SoCs. On RZ/G2L only the get operation has been
tested at the moment.
While at it, as the power registers on RZ/G2L support access sizes of 8
bits, and these registers on RZ/G3S support access sizes of 8/16/32
bits, replace writel()/readl() on these registers with writeb()/readb().
This should allow us to use the same code on both SoCs w/o any issues.
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20231207070700.4156557-6-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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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.