spi-fsl-lpspi: i.MX93 ERR051608

[Clark Wang]

Hi Stefan,

So sorry. The patch for this limitation appears to have been missed during the integration.
The limitation is still present in i.MX93.

Thank you very much for bringing this to our attention!
The patch will be integrated recently.

Best Regards,
Clark Wang

> -----Original Message-----
> From: Stefan Wahren <wahrenst at gmx.net>
> Sent: 2024年8月16日 21:52
> To: Fabio Estevam <festevam at gmail.com>; Clark Wang
> <xiaoning.wang at nxp.com>
> Cc: Shawn Guo <shawnguo at kernel.org>; imx at lists.linux.dev; Sascha Hauer
> <s.hauer at pengutronix.de>; Pengutronix Kernel Team
> <kernel at pengutronix.de>; Linux ARM <linux-arm-kernel at lists.infradead.org>
> Subject: spi-fsl-lpspi: i.MX93 ERR051608
> 
> Hi,
> 
> according to the latest i.MX93 errata [1] the prescale bits in TCR
> register are limit to 0 or 1 (ERR051608). The workaround paragraph
> states that there is a software workaround in imx_5.15 (vendor tree).
> 
> Looking at the mainline driver [2] doesn't look like this
> limitation/errata has been addressed.
> 
> Can someone point me to the vendor workaround, because i cannot find it
> in the linux-imx repo?
> Or do i miss something?
> 
> Best regards
> 
> [1] -
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww
> .nxp.com%2Fdocs%2Fen%2Ferrata%2Fi.MX93_1P87f.pdf&data=05%7C02%7
> Cxiaoning.wang%40nxp.com%7Cdfc189caa5884c9d148d08dcbdfa950f%7C6
> 86ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C638594131142301013%
> 7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLC
> JBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=Bw%2BS1alIJOf
> ZQiGT1e9D7bRnqyRfV8ds3x4Ndybbb3s%3D&reserved=0
> [2] -
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Felixir.
> bootlin.com%2Flinux%2Fv6.11-rc3%2Fsource%2Fdrivers%2Fspi%2Fspi-fsl-lps
> pi.c%23L318&data=05%7C02%7Cxiaoning.wang%40nxp.com%7Cdfc189caa
> 5884c9d148d08dcbdfa950f%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0
> %7C0%7C638594131142311055%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiM
> C4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7
> C%7C%7C&sdata=SsX%2BXTLdR7muT1E030eRLxQo1yjMt4R0GuuVF7Xthws
> %3D&reserved=0