linux-kernel - Re: [PATCH v3 4/4] arm64: dts: rockchip: Add devicetree for Pine64 PineTab2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <ZbTNXL6s_wQugVC5@mecka.net>
Date: Sat, 27 Jan 2024 10:31:08 +0100
From: Manuel Traut <manut@...ka.net>
To: Jonas Karlman <jonas@...boo.se>
Cc: Ondřej Jirman <megi@....cz>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Jessica Zhang <quic_jesszhan@...cinc.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>, Sandy Huang <hjc@...k-chips.com>,
	Mark Yao <markyao0591@...il.com>,
	Diederik de Haas <didi.debian@...ow.org>,
	Segfault <awarnecke002@...mail.com>,
	Arnaud Ferraris <aferraris@...ian.org>,
	Danct12 <danct12@...eup.net>, dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v3 4/4] arm64: dts: rockchip: Add devicetree for Pine64
 PineTab2

Hi Jonas,

On Wed, Jan 03, 2024 at 03:19:25PM +0100, Jonas Karlman wrote:
> Hi Manuel,
> 
> On 2024-01-03 14:40, Manuel Traut wrote:
> > Hi Jonas and Ondřej,
> > 
> >>>> +&sfc {
> >>>> +	pinctrl-names = "default";
> >>>> +	pinctrl-0 = <&fspi_dual_io_pins>;
> >>>> +	status = "okay";
> >>>> +	#address-cells = <1>;
> >>>> +	#size-cells = <0>;
> >>>> +
> >>>> +	flash@0 {
> >>>> +		compatible = "jedec,spi-nor";
> >>>> +		reg = <0>;
> >>>> +		spi-max-frequency = <24000000>;
> >>>
> >>> That's a bit on the low side. The flash chip should work for all commands up to
> >>> 80MHz https://megous.com/dl/tmp/b428ad9b85ac4633.png and SGM3157YC6 switch
> >>> for the FSPI-CLK should have high enough bandwidth, too.
> >>
> >> I agree that this is a little bit on the low side, it was a safe rate
> >> that I used for U-Boot. U-Boot required an exact rate of the supported
> >> sfc clk rates: 24, 50, 75, 100, 125 or 150 MHz.
> >>
> >> Please also note that the SPI NOR flash chip used in PineTab2 is not a
> >> GigaDevice GD25LQ128E, it should be a SiliconKaiser SK25LP128, same as
> >> found in the Pine64 PinePhone Pro.
> > 
> > The schematics for v2.0 reference a GD25LQ128EWIGR. I never checked the jedec
> > id. How did you retrieve this information, or is it maybe a difference in v0.1
> > and 2.0?
> 
> This was when working on mainline U-Boot for the PineTab2 (and other
> rk356x devices). See [1] for a pending U-Boot patch that is waiting on a
> proper mainline linux devicetree for the PT2.
> 
> The JEDEC ID is reported as 0x257018 on my v2.0 production unit, and
> does not match the JEDEC ID for GD25LQ128E (0xc86018) referenced in
> the schematics.
> 
> I found that the JEDEC ID 0x257018 was referenced in prior patches
> related to the SK25LP128 SPI NOR flash chip used in Pine64 PinePhone Pro.
> 
> I have only ever tested the 24 MHz rate, but I am expecting that e.g.
> 100 MHz also should work. Will not be able to test on my PT2 until at
> earliest next week.
> 
> [1] https://github.com/Kwiboo/u-boot-rockchip/commit/66562d6eaf2c11a9f97fcdba379d3ceda8aa70ef

I found the time to verify that 100 MHz is also working.
Will include this in v4

Thanks for your help
Manuel