9453e097b8
[ Upstream commit a429c60baefd95ab43a2ce7f25d5b2d7a2e431df ]
The IMX8MN platform does not have any video processing unit (VPU), and
indeed in the reference manual (document IMX8MNRM Rev 2, 07/2022) there
is no occurrence of its pll. From an analysis of the code and the RM
itself, I think vpu pll is used instead of m7 alternate pll, probably
for copy and paste of code taken from modules of similar architectures.
As an example for all, if we consider the second row of the "Clock Root"
table of chapter 5 (Clocks and Power Management) of the RM:
Clock Root offset Source Select (CCM_TARGET_ROOTn[MUX])
... ... ...
ARM_M7_CLK_ROOT 0x8080 000 - 24M_REF_CLK
001 - SYSTEM_PLL2_DIV5
010 - SYSTEM_PLL2_DIV4
011 - M7_ALT_PLL_CLK
100 - SYSTEM_PLL1_CLK
101 - AUDIO_PLL1_CLK
110 - VIDEO_PLL_CLK
111 - SYSTEM_PLL3_CLK
... ... ...
but in the source code, the imx8mn_m7_sels clocks list contains vpu_pll
for the source select bits 011b.
So, let's rename "vpu_pll" to "m7_alt_pll" to be consistent with the RM.
The IMX8MN_VPU_* constants have not been removed to ensure backward
compatibility of the patch.
No functional changes intended.
Fixes: 96d6392b54dbb ("clk: imx: Add support for i.MX8MN clock driver")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Acked-by: Marco Felsch <m.felsch@pengutronix.de>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20221117113637.1978703-2-dario.binacchi@amarulasolutions.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
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.