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Message-Id: <20200416074141.3555-1-wenhu.wang@vivo.com>
Date: Thu, 16 Apr 2020 00:41:37 -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
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