commit 77bb5901aa535dcba477c2cc082f2196752382fd
Author: Philipp Zabel <philipp.zabel@gmail.com>
Date:   Tue Jun 10 08:33:59 2008 +0200

    PXA: support platform hook for serial_pxa_pm
    
    Some platforms may need to power up/down devices attached
    to the serial port. Provide them hooks to be called
    via serial_pxa_pm.
    
    Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>

diff --git a/arch/arm/mach-pxa/devices.c b/arch/arm/mach-pxa/devices.c
index abc161d..da3889c 100644
--- a/arch/arm/mach-pxa/devices.c
+++ b/arch/arm/mach-pxa/devices.c
@@ -16,6 +16,7 @@
 #include <asm/arch/pxa2xx_spi.h>
 #include <asm/arch/camera.h>
 #include <asm/arch/audio.h>
+#include <asm/arch/serial.h>
 
 #include "devices.h"
 #include "generic.h"
@@ -229,6 +230,26 @@ struct platform_device pxa_device_hwuart = {
 	.num_resources	= ARRAY_SIZE(pxa_resource_hwuart),
 };
 
+void __init pxa_set_ffuart_info(struct pxa_serial_platform_data *info)
+{
+	pxa_device_ffuart.dev.platform_data = info;
+}
+
+void __init pxa_set_btuart_info(struct pxa_serial_platform_data *info)
+{
+	pxa_device_btuart.dev.platform_data = info;
+}
+
+void __init pxa_set_stuart_info(struct pxa_serial_platform_data *info)
+{
+	pxa_device_stuart.dev.platform_data = info;
+}
+
+void __init pxa_set_hwuart_info(struct pxa_serial_platform_data *info)
+{
+	pxa_device_hwuart.dev.platform_data = info;
+}
+
 static struct resource pxai2c_resources[] = {
 	{
 		.start	= 0x40301680,
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index b4f7ffb..49323ec 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -48,7 +48,7 @@
 #include <asm/hardware.h>
 #include <asm/irq.h>
 #include <asm/arch/pxa-regs.h>
-
+#include <asm/arch/serial.h>
 
 struct uart_pxa_port {
 	struct uart_port        port;
@@ -549,11 +549,15 @@ serial_pxa_pm(struct uart_port *port, unsigned int state,
 	      unsigned int oldstate)
 {
 	struct uart_pxa_port *up = (struct uart_pxa_port *)port;
+	struct pxa_serial_platform_data *info = port->dev->platform_data;
 
 	if (!state)
 		clk_enable(up->clk);
 	else
 		clk_disable(up->clk);
+
+	if (info && info->pm)
+		info->pm(to_platform_device(port->dev), oldstate, state);
 }
 
 static void serial_pxa_release_port(struct uart_port *port)
diff --git a/include/asm-arm/arch-pxa/serial.h b/include/asm-arm/arch-pxa/serial.h
new file mode 100644
index 0000000..1cae3e9
--- /dev/null
+++ b/include/asm-arm/arch-pxa/serial.h
@@ -0,0 +1,23 @@
+#ifndef PXA_SERIAL_H
+#define PXA_SERIAL_H
+/*
+ * Copyright (C) 2008 Dmitry Baryshkov
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+struct pxa_serial_platform_data {
+	void (*pm)(struct platform_device *dev, unsigned int oldstate,
+			unsigned int state);
+};
+
+extern void pxa_set_ffuart_info(struct pxa_serial_platform_data *info);
+extern void pxa_set_btuart_info(struct pxa_serial_platform_data *info);
+extern void pxa_set_stuart_info(struct pxa_serial_platform_data *info);
+extern void pxa_set_hwuart_info(struct pxa_serial_platform_data *info);
+
+#endif
+