From 78841462d72fe7038cb7ea48adecc6fc395f2dc5 Mon Sep 17 00:00:00 2001 From: Jarkko Nikula <jhnikula@gmail.com> Date: Mon, 24 Jan 2011 17:51:22 +0200 Subject: [PATCH] serial: omap-serial: Enable the UART wake-up bits always OMAP can do also dynamic idling so wake-up enable register should be set also while system is running. If UART_OMAP_WER is not set, then for instance the RX activity cannot wake up the UART port that is sleeping. This RX wake-up feature was working when the 8250 driver was used instead of omap-serial. Reason for this is that the 8250 doesn't set the UART_OMAP_WER and then arch/arm/mach-omap2/pm34xx.c ends up saving and restoring the reset default which is the same than value OMAP_UART_WER_MOD_WKUP here. Fix this by moving the conditional UART_OMAP_WER write from serial_omap_pm into serial_omap_startup where wake-up bits are set unconditionally. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Cc: Govindraj.R <govindraj.raja@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> --- drivers/tty/serial/omap-serial.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 699b34446a55f..763537943a530 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -520,6 +520,9 @@ static int serial_omap_startup(struct uart_port *port) up->ier = UART_IER_RLSI | UART_IER_RDI; serial_out(up, UART_IER, up->ier); + /* Enable module level wake up */ + serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP); + up->port_activity = jiffies; return 0; } @@ -827,9 +830,6 @@ serial_omap_pm(struct uart_port *port, unsigned int state, serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); serial_out(up, UART_EFR, efr); serial_out(up, UART_LCR, 0); - /* Enable module level wake up */ - serial_out(up, UART_OMAP_WER, - (state != 0) ? OMAP_UART_WER_MOD_WKUP : 0); } static void serial_omap_release_port(struct uart_port *port) -- GitLab