linux-kernel - [PATCH v3,0/4] drivers: uio: new driver uio_fsl_85xx_cache

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Date:   Thu, 16 Apr 2020 00:49:14 -0700
From:   Wang Wenhu <wenhu.wang@...o.com>
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        oss@...error.net, christophe.leroy@....fr,
        linuxppc-dev@...ts.ozlabs.org
Cc:     kernel@...o.com, Wang Wenhu <wenhu.wang@...o.com>
Subject: [PATCH v3,0/4] drivers: uio: new driver uio_fsl_85xx_cache_sram

This series add a new uio driver for freescale 85xx platforms to
access the Cache-Sram form user level. This is extremely helpful
for the user-space applications that require high performance memory
accesses.

It fixes the compile errors and warning of the hardware level drivers
and implements the uio driver in uio_fsl_85xx_cache_sram.c.

Changes since v1:
 * Addressed comments from Greg K-H
 * Moved kfree(info->name) into uio_info_free_internal()

Changes since v2:
 * Drop the patch that modifies Kconfigs of arch/powerpc/platforms
   and modified the sequence of patches:
    01:dropped, 02->03, 03->02, 04->01, 05->04
 * Addressed comments from Greg, Scott and Christophe
 * Use "uiomem->internal_addr" as if condition for sram memory free,
   and memset the uiomem entry
 * Modified of_match_table make the driver apart from Cache-Sram HW info
   which belong to the HW level driver fsl_85xx_cache_sram to match
 * Use roundup_pow_of_two for align calc(really learned a lot from Christophe)
 * Remove useless clear block of uiomem entries.
 * Use UIO_INFO_VER micro for info->version, and define it as
   "devicetree,pseudo", meaning this is pseudo device and probed from
   device tree configuration
 * Select FSL_85XX_CACHE_SRAM rather than depends on it

Wang Wenhu (4):
  powerpc: sysdev: fix compile error for fsl_85xx_l2ctlr
  powerpc: sysdev: fix compile error for fsl_85xx_cache_sram
  powerpc: sysdev: fix compile warning for fsl_85xx_cache_sram
  drivers: uio: new driver for fsl_85xx_cache_sram

 arch/powerpc/sysdev/fsl_85xx_cache_sram.c |   3 +-
 arch/powerpc/sysdev/fsl_85xx_l2ctlr.c     |   1 +
 drivers/uio/Kconfig                       |   9 ++
 drivers/uio/Makefile                      |   1 +
 drivers/uio/uio_fsl_85xx_cache_sram.c     | 158 ++++++++++++++++++++++
 5 files changed, 171 insertions(+), 1 deletion(-)
 create mode 100644 drivers/uio/uio_fsl_85xx_cache_sram.c

-- 
2.17.1