From: Domen Puncer <domen.puncer@telargo•com>
To: linuxppc-embedded@ozlabs•org
Subject: [PATCH 2/7] mpc52xx suspend: UART
Date: Thu, 1 Mar 2007 08:55:04 +0100 [thread overview]
Message-ID: <20070301075504.GB17184@moe.telargo.com> (raw)
In-Reply-To: <20070301075323.GP4397@moe.telargo.com>
MPC52xx uart power management.
Not sure how exactly this should be written, but this seems
to work, and works around a few seconds delay in resume.
Signed-off-by: Domen Puncer <domen.puncer@telargo•com>
Index: grant.git/drivers/serial/mpc52xx_uart.c
===================================================================
--- grant.git.orig/drivers/serial/mpc52xx_uart.c
+++ grant.git/drivers/serial/mpc52xx_uart.c
@@ -418,6 +418,22 @@ mpc52xx_uart_verify_port(struct uart_por
return 0;
}
+/* just Reenable TX and RX */
+static void mpc52xx_uart_pm(struct uart_port *port, unsigned int state, unsigned int oldstate)
+{
+ struct mpc52xx_psc __iomem *psc = PSC(port);
+ unsigned long flags;
+
+ /* Get the lock */
+ spin_lock_irqsave(&port->lock, flags);
+
+ /* Reenable TX & RX */
+ out_8(&psc->command,MPC52xx_PSC_TX_ENABLE);
+ out_8(&psc->command,MPC52xx_PSC_RX_ENABLE);
+
+ /* We're all set, release the lock */
+ spin_unlock_irqrestore(&port->lock, flags);
+}
static struct uart_ops mpc52xx_uart_ops = {
.tx_empty = mpc52xx_uart_tx_empty,
@@ -432,8 +448,10 @@ static struct uart_ops mpc52xx_uart_ops
.startup = mpc52xx_uart_startup,
.shutdown = mpc52xx_uart_shutdown,
.set_termios = mpc52xx_uart_set_termios,
-/* .pm = mpc52xx_uart_pm, Not supported yet */
-/* .set_wake = mpc52xx_uart_set_wake, Not supported yet */
+
+ .pm = mpc52xx_uart_pm,
+/* .set_wake = mpc52xx_uart_set_wake,*/
+
.type = mpc52xx_uart_type,
.release_port = mpc52xx_uart_release_port,
.request_port = mpc52xx_uart_request_port,
next prev parent reply other threads:[~2007-03-01 7:55 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-01 7:53 [PATCH 0/7] MPC5200 and Lite5200b low power modes Domen Puncer
2007-03-01 7:54 ` [PATCH 1/7] mpc52xx suspend: bestcomm Domen Puncer
2007-03-01 7:55 ` Domen Puncer [this message]
2007-03-01 7:55 ` [PATCH 3/7] mpc52xx suspend: FEC (ethernet) Domen Puncer
2007-03-01 7:56 ` [PATCH 4/7] mpc52xx suspend: USB Domen Puncer
2007-03-01 7:56 ` [PATCH 5/7] mpc52xx suspend: deep-sleep Domen Puncer
2007-03-01 7:57 ` [PATCH 6/7] lite5200b suspend: PIC Domen Puncer
2007-03-01 7:59 ` [u-boot patch] support lite5200b wakeup in u-boot Domen Puncer
2007-03-01 8:49 ` Stefan Roese
2007-03-01 8:00 ` [PATCH 7/7] lite5200b suspend: low-power mode Domen Puncer
2007-03-02 18:57 ` Scott Wood
2007-03-03 7:15 ` Domen Puncer
2007-03-01 14:25 ` [PATCH 0/7] MPC5200 and Lite5200b low power modes Grant Likely
2007-03-01 14:51 ` New Bestcomm/FEC patches (was: Re: [PATCH 0/7] MPC5200 and Lite5200b low power modes) Bartlomiej Sieka
2007-03-02 7:31 ` Domen Puncer
2007-03-02 21:35 ` [PATCH 0/7] MPC5200 and Lite5200b low power modes Sylvain Munaut
2007-03-03 7:33 ` Domen Puncer
2007-03-03 19:58 ` Endianness versus too many byte swaps?? Charles Krinke
2007-03-05 10:53 ` [PATCH 0/7] MPC5200 and Lite5200b low power modes Domen Puncer
2007-03-05 10:58 ` Sylvain Munaut
2007-03-05 20:21 ` Domen Puncer
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