Thread (9 messages) 9 messages, 2 authors, 2019-03-20

Re: [PATCH 2/4] clk: meson: meson8b: use a sparate clock table for Meson8m2

From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: 2019-03-20 20:38:46
Also in: linux-amlogic, linux-clk, linux-devicetree, lkml

Hi Neil,

On Wed, Mar 20, 2019 at 9:15 AM Neil Armstrong [off-list ref] wrote:
Hi,

There is a typo in the subject "s/sparate/separate/" !
good catch - I'll wait until the weekend and send a fixed version then!
On 19/03/2019 22:51, Martin Blumenstingl wrote:
quoted
Meson8, Meson8b and Meson8m2 implement a similar clock controller.
However, there are a few differences between the three actual IP blocks.

One example where Meson8m2 differs from Meson8b is the VPU clock setup:
- the VPU input mux can choose between "fclk_div4", "fclk_div3",
  "fclk_div5" and "fclk_div7" on Meson8b
- however, on Meson8m2 it can choose between "fclk_div4", "fclk_div3",
  "fclk_div5" and "gp_pll" (GP_PLL only exists on Meson8m2, it's the
  predecessor of the GP0_PLL clock on GXBB/GXL/GXM))
By curiosity, what is the default (maximum) setup ? On GX & G12A, fclk_div3 is the default/max setup.
u-boot on my Meson8m2 board uses GP_PLL as input (364MHz)
u-boot on my Meson8b (Odroid-C1) uses fclk_div7 as input (approx. 364MHz)
if you want I can look up the divider (I don't remember it from the
top of my head)

[...]
Apart the typo in the subject,
Reviewed-by: Neil Armstrong <redacted>
thank you!


Regards
Martin

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