mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
serial: sc16is7xx: Put IOControl register into regmap_volatile
According to the IOControl register bits description in the page 31 of the product datasheet, we know the bit 3 of IOControl register is softreset, this bit will self-clearing once the reset finish. In the probe, the softreset bit is set, and when we read this register from debugfs/regmap interface, we found the softreset bit is still setting, this confused us for a while. Finally we found this register is cached, to read the real value from register, we could put it into the regmap_volatile(). Signed-off-by: Hui Wang <hui.wang@canonical.com> Link: https://lore.kernel.org/r/20230724034727.17335-1-hui.wang@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
130a9571ae
commit
77a82cebf0
1 changed files with 1 additions and 0 deletions
|
@ -488,6 +488,7 @@ static bool sc16is7xx_regmap_volatile(struct device *dev, unsigned int reg)
|
|||
case SC16IS7XX_TXLVL_REG:
|
||||
case SC16IS7XX_RXLVL_REG:
|
||||
case SC16IS7XX_IOSTATE_REG:
|
||||
case SC16IS7XX_IOCONTROL_REG:
|
||||
return true;
|
||||
default:
|
||||
break;
|
||||
|
|
Loading…
Reference in a new issue