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
