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authorRafael Gago <rafael.gago@gmail.com>2017-07-31 10:46:43 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-08-28 20:51:20 +0200
commit6e0a5de2136b26bd0b3501f2f362abfffeb47d1e (patch)
tree7ee3baed1bbcf78c70c378a3cb909c1583a6041a /include/linux/serial_8250.h
parenta6845e1e1b781933ed7f54919f5ea4a108d1b9f2 (diff)
serial: 8250: Use hrtimers for rs485 delays
Previously the timers where based on the classic timers, giving a too coarse resolution on systems with configs of less than 1000 HZ. This patch changes the rs485 timers to hrtimers. Signed-off-by: Rafael Gago Castano <rgc@hms.se> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/serial_8250.h')
-rw-r--r--include/linux/serial_8250.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
index 61fbb440449c..a27ef5f56431 100644
--- a/include/linux/serial_8250.h
+++ b/include/linux/serial_8250.h
@@ -80,9 +80,10 @@ struct uart_8250_ops {
};
struct uart_8250_em485 {
- struct timer_list start_tx_timer; /* "rs485 start tx" timer */
- struct timer_list stop_tx_timer; /* "rs485 stop tx" timer */
- struct timer_list *active_timer; /* pointer to active timer */
+ struct hrtimer start_tx_timer; /* "rs485 start tx" timer */
+ struct hrtimer stop_tx_timer; /* "rs485 stop tx" timer */
+ struct hrtimer *active_timer; /* pointer to active timer */
+ struct uart_8250_port *port; /* for hrtimer callbacks */
};
/*