From: Mark Brown Date: Tue, 14 Feb 2023 18:04:11 +0000 (+0000) Subject: spi: STIG Mode Fixes for spi-cadence-qspi driver X-Git-Tag: v6.6.17~5383^2~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e97622254420ce5f03f3f3e6ad6ecbf86da248d9;p=platform%2Fkernel%2Flinux-rpi.git spi: STIG Mode Fixes for spi-cadence-qspi driver Merge series from Dhruva Gole : * Reset the CMD_CTRL Register, without which read/writes in STIG mode were failing in some cases. The issue came to light while using STIG Mode for small reads. * Also add a flag that can allow us to do direct reads but distinguish direct writes, thus enabling us to disable writes in DAC mode in some cases that require it. (Like to write to some connected Flash registers) * Fix register reads in STIG mode and also use STIG mode while reading flash registers. Currently if you try to read a register while in STIG mode there is no support for ADDR and thus naturally a register never gets read from the flash. This patch series has been tested on a TI AM625-SK-EVM with both a quad spi nor flash (s25hs) and OSPI NOR Flash (s28hs). Output of ltp-ddt test, "DD_RW_ERASESIZE_UBIFS" run with s25hs512t flash: ... [ 2.334068] spi-nor spi0.0: s25hs512t (65536 Kbytes) [ 2.339185] 7 fixed-partitions partitions found on MTD device fc40000.spi.0 [ 2.346158] Creating 7 MTD partitions on "fc40000.spi.0": [ 2.351555] 0x000000000000-0x000000080000 : "ospi.tiboot3" [ 2.358344] 0x000000080000-0x000000280000 : "ospi.tispl" [ 2.364788] 0x000000280000-0x000000680000 : "ospi.u-boot" [ 2.371311] 0x000000680000-0x0000006c0000 : "ospi.env" [ 2.377519] 0x0000006c0000-0x000000700000 : "ospi.env.backup" [ 2.384419] 0x000000800000-0x000003fc0000 : "ospi.rootfs" [ 2.390890] 0x000003fc0000-0x000004000000 : "ospi.phypattern" ..snip.. Test Start Time: Wed Jan 11 21:14:31 2023 ----------------------------------------- Testcase Result Exit Value -------- ------ ---------- OSPI_S_FUNC_DD_RW_ERASESIZE_UBIFS PASS 0 ----------------------------------------------- Total Tests: 1 Total Skipped Tests: 0 Total Failures: 0 Kernel Version: 6.2.0-rc1-00040-g700d796a94e0-dirty Machine Architecture: aarch64 Hostname: am62xx-evm --- e97622254420ce5f03f3f3e6ad6ecbf86da248d9