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| author |   Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2018-06-12 11:58:37 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-06-28 21:02:38 +0900 |
| commit | 728e74a46fd4166935f2079b619007eaad98c9a5 (patch) | |
| tree | 9e813922312937eb58c14b05ee808ac1b6a336af /drivers/tty/serial | |
| parent | Linux 4.18-rc2 (diff) | |
| download | linux-dev-728e74a46fd4166935f2079b619007eaad98c9a5.tar.xz linux-dev-728e74a46fd4166935f2079b619007eaad98c9a5.zip | |
serial: imx: fix comment about UCR2_SRST and its handling for shadowing
Initially when register shadowing was introduced (commit 3a0ab62f43de
("serial: imx: implement shadow registers for UCRx and UFCR")) the logic
to handle UCR2_SRST was wrong but documented consistently. Later the
handling was fixed, but the comment was not. This change makes up leeway
for the latter.
Fixes: 0aa821d846c0 ("serial: imx: fix cached UCR2 read on software reset")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/imx.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 4e853570ea80..3f2b33ecf30a 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -314,7 +314,8 @@ static u32 imx_uart_readl(struct imx_port *sport, u32 offset) /* * UCR2_SRST is the only bit in the cached registers that might * differ from the value that was last written. As it only - * clears after being set, reread conditionally. + * automatically becomes one after being cleared, reread + * conditionally. */ if (!(sport->ucr2 & UCR2_SRST)) sport->ucr2 = readl(sport->port.membase + offset); |