From 728e74a46fd4166935f2079b619007eaad98c9a5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Tue, 12 Jun 2018 11:58:37 +0200 Subject: [PATCH] serial: imx: fix comment about UCR2_SRST and its handling for shadowing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Reviewed-by: Stefan Agner Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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); -- GitLab