linux-kernel - Re: [PATCH v3 3/3] nvmem: rockchip-otp: Add support for rk3562

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Message-ID: <aYS5ATObatoDnKFs@1wt.eu>
Date: Thu, 5 Feb 2026 16:36:33 +0100
From: Willy Tarreau <w@....eu>
To: Heiko Stübner <heiko@...ech.de>
Cc: Kever Yang <kever.yang@...k-chips.com>, linux-rockchip@...ts.infradead.org,
        Finley Xiao <finley.xiao@...k-chips.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: Re: [PATCH v3 3/3] nvmem: rockchip-otp: Add support for rk3562

Hi Heiko,

On Thu, Feb 05, 2026 at 01:50:34PM +0100, Heiko Stübner wrote:
> Hi Willy,
> 
> Am Montag, 28. Juli 2025, 21:01:54 Mitteleuropäische Normalzeit schrieb Willy Tarreau:
> > On Tue, Apr 15, 2025 at 06:32:03PM +0800, Kever Yang wrote:
> > > From: Finley Xiao <finley.xiao@...k-chips.com>
> > > 
> > > This adds the necessary data for handling otp on the rk3562.
> > > 
> > > Signed-off-by: Finley Xiao <finley.xiao@...k-chips.com>
> > > Signed-off-by: Kever Yang <kever.yang@...k-chips.com>
> > 
> > Successfully tested with Jonas' patches on top of it on my
> > Radxa E20C (RK3528):
> > 
> > Tested-by: Willy Tarreau <w@....eu>
> 
> as you replied to the rk3562 variant, does that mean the rk3528
> uses the same variant data?

Now you make me doubt, I'll have to recheck the original message
in its series and the patches that I had applied. I seem to
rememeber there were certain common patches between the two but
I don't remember which ones, and it's also possibly that I replied
by accident to the wrong message in the series or that I mistook
one patch for another when comparing them :-/

Ah, I seem to have found it, there's indeed the 3562 in my local
patches and the 3528 as well, both of which rely on the 3568 one:

  commit a68433c468c8a9d4789641eb6a40ae571fb7f01f
  Author: Finley Xiao <finley.xiao@...k-chips.com>
  Date:   Tue Apr 15 18:32:03 2025 +0800

    nvmem: rockchip-otp: Add support for RK3562
    
    This adds the necessary data for handling otp on the rk3562.
    
    Signed-off-by: Finley Xiao <finley.xiao@...k-chips.com>
    Signed-off-by: Kever Yang <kever.yang@...k-chips.com>
    Reviewed-by: Heiko Stuebner <heiko@...ech.de>
    Signed-off-by: Jonas Karlman <jonas@...boo.se>

and:

  commit 249b07e24d3d1d47b7ec23d5f09a56837b66d7f5
  Author: Jonas Karlman <jonas@...boo.se>
  Date:   Sun Mar 16 00:05:45 2025 +0000

    nvmem: rockchip-otp: Add support for RK3528
    
    Add support for the OTP controller in RK3528. The OTPC is similar to the
    OTPC in RK3562 and RK3568, exept for a missing phy clock and reset.
    
    Signed-off-by: Jonas Karlman <jonas@...boo.se>

It's very possible that I visually mistook one for the other when
responding to the series, and if so, I'm really sorry about that!

The former relies on rk3568_data and the latter on rk3528_data, which
is defined like this:

+static const char * const rk3528_otp_clocks[] = {
+       "otp", "apb_pclk", "sbpi",
+};
+
+static const struct rockchip_data rk3528_data = {
+       .size = 0x80,
+       .word_size = sizeof(u16),
+       .clks = rk3528_otp_clocks,
+       .num_clks = ARRAY_SIZE(rk3528_otp_clocks),
+       .reg_read = rk3568_otp_read,
+};

Looks like the patches originally come from this branch that I
manually cherry-picked:

  https://github.com/Kwiboo/linux-rockchip/commits/next-20250620-rk3528

I have one extra E20C that's not yet in prod if you're interested in
me running some specific tests. It will not happen quickly but just let
me know if I can help, as it's a nice little machine.

Willy