Messages in this thread | | | Subject | Re: [PATCH v1] can: mcp251xfd: Add some sysfs debug interfaces for registers r/w | From | Su <> | Date | Fri, 22 Jan 2021 16:04:21 +0800 |
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在 2021/1/22 下午3:22, Marc Kleine-Budde 写道: > On 1/22/21 7:22 AM, Su Yanjun wrote: >> When i debug mcp2518fd, some method to track registers is >> needed. This easy debug interface will be ok. > NACK > > As the driver uses regmap, everything should be there already. > > To read use: > > | cat /sys/kernel/debug/regmap/spi0.0-crc/registers > > Register write support for devices that are handles by proper kernel drivers is > a pure debugging tool, thus not enabled by default, not even with a Kconfig > switch. You have to enable it manually, have a look at commit: > > 09c6ecd39410 regmap: Add support for writing to regmap registers via debugfs
You're right.
Thank you
> > regards, > Marc >
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