4 files changed, 98 insertions, 27 deletions

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 3a6da80b081c..61fb8b6d19af 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -131,7 +131,8 @@ struct atmel_uart_char {
 struct atmel_uart_port {
         struct uart_port        uart;           /* uart */
         struct clk              *clk;           /* uart clock */
-        unsigned short          suspended;      /* is port suspended? */
+        int                     may_wakeup;     /* cached value of device_may_wakeup for times we need to disable it */
+        u32                     backup_imr;     /* IMR saved during suspend */
         int                     break_active;   /* break being received */
 
         short                   use_dma_rx;     /* enable PDC receiver */
@@ -984,8 +985,15 @@ static void atmel_serial_pm(struct uart_port *port, unsigned int state,
                  * This is called on uart_open() or a resume event.
                  */
                 clk_enable(atmel_port->clk);
+
+                /* re-enable interrupts if we disabled some on suspend */
+                UART_PUT_IER(port, atmel_port->backup_imr);
                 break;
         case 3:
+                /* Back up the interrupt mask and disable all interrupts */
+                atmel_port->backup_imr = UART_GET_IMR(port);
+                UART_PUT_IDR(port, -1);
+
                 /*
                  * Disable the peripheral clock for this serial port.
                  * This is called on uart_close() or a suspend event.
@@ -1475,13 +1483,12 @@ static int atmel_serial_suspend(struct platform_device *pdev,
                         cpu_relax();
         }
 
-        if (device_may_wakeup(&pdev->dev)
-            && !atmel_serial_clk_will_stop())
-                enable_irq_wake(port->irq);
-        else {
-                uart_suspend_port(&atmel_uart, port);
-                atmel_port->suspended = 1;
-        }
+        /* we can not wake up if we're running on slow clock */
+        atmel_port->may_wakeup = device_may_wakeup(&pdev->dev);
+        if (atmel_serial_clk_will_stop())
+                device_set_wakeup_enable(&pdev->dev, 0);
+
+        uart_suspend_port(&atmel_uart, port);
 
         return 0;
 }
@@ -1491,11 +1498,8 @@ static int atmel_serial_resume(struct platform_device *pdev)
         struct uart_port *port = platform_get_drvdata(pdev);
         struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
 
-        if (atmel_port->suspended) {
-                uart_resume_port(&atmel_uart, port);
-                atmel_port->suspended = 0;
-        } else
-                disable_irq_wake(port->irq);
+        uart_resume_port(&atmel_uart, port);
+        device_set_wakeup_enable(&pdev->dev, atmel_port->may_wakeup);
 
         return 0;
 }
@@ -1513,6 +1517,8 @@ static int __devinit atmel_serial_probe(struct platform_device *pdev)
         BUILD_BUG_ON(!is_power_of_2(ATMEL_SERIAL_RINGSIZE));
 
         port = &atmel_ports[pdev->id];
+        port->backup_imr = 0;
+
         atmel_init_port(port, pdev);
 
         if (!atmel_use_dma_rx(&port->uart)) {
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index 6a29f9330a73..3f90f1bbbbcd 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -127,8 +127,13 @@
 #define  UCR3_RXDSEN     (1<<6)  /* Receive status interrupt enable */
 #define  UCR3_AIRINTEN   (1<<5)  /* Async IR wake interrupt enable */
 #define  UCR3_AWAKEN     (1<<4)  /* Async wake interrupt enable */
-#define  UCR3_REF25      (1<<3)  /* Ref freq 25 MHz */
-#define  UCR3_REF30      (1<<2)  /* Ref Freq 30 MHz */
+#ifdef CONFIG_ARCH_IMX
+#define  UCR3_REF25      (1<<3)  /* Ref freq 25 MHz, only on mx1 */
+#define  UCR3_REF30      (1<<2)  /* Ref Freq 30 MHz, only on mx1 */
+#endif
+#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3
+#define  UCR3_RXDMUXSEL  (1<<2)  /* RXD Muxed Input Select, on mx2/mx3 */
+#endif
 #define  UCR3_INVT       (1<<1)  /* Inverted Infrared transmission */
 #define  UCR3_BPEN       (1<<0)  /* Preset registers enable */
 #define  UCR4_CTSTL_32   (32<<10) /* CTS trigger level (32 chars) */
@@ -445,7 +450,7 @@ static irqreturn_t imx_int(int irq, void *dev_id)
                         readl(sport->port.membase + UCR1) & UCR1_TXMPTYEN)
                 imx_txint(irq, dev_id);
 
-        if (sts & USR1_RTSS)
+        if (sts & USR1_RTSD)
                 imx_rtsint(irq, dev_id);
 
         return IRQ_HANDLED;
@@ -598,6 +603,12 @@ static int imx_startup(struct uart_port *port)
         temp |= (UCR2_RXEN | UCR2_TXEN);
         writel(temp, sport->port.membase + UCR2);
 
+#if defined CONFIG_ARCH_MX2 || defined CONFIG_ARCH_MX3
+        temp = readl(sport->port.membase + UCR3);
+        temp |= UCR3_RXDMUXSEL;
+        writel(temp, sport->port.membase + UCR3);
+#endif
+
         /*
          * Enable modem status interrupts
          */
@@ -1133,13 +1144,19 @@ static int serial_imx_probe(struct platform_device *pdev)
         if(pdata && (pdata->flags & IMXUART_HAVE_RTSCTS))
                 sport->have_rtscts = 1;
 
-        if (pdata->init)
-                pdata->init(pdev);
+        if (pdata->init) {
+                ret = pdata->init(pdev);
+                if (ret)
+                        goto clkput;
+        }
 
         uart_add_one_port(&imx_reg, &sport->port);
         platform_set_drvdata(pdev, &sport->port);
 
         return 0;
+clkput:
+        clk_put(sport->clk);
+        clk_disable(sport->clk);
 unmap:
         iounmap(sport->port.membase);
 free:
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
index f7a0d37c4221..abc00be55433 100644
--- a/drivers/serial/pxa.c
+++ b/drivers/serial/pxa.c
@@ -534,6 +534,11 @@ serial_pxa_set_termios(struct uart_port *port, struct ktermios *termios,
 
         serial_out(up, UART_IER, up->ier);
 
+        if (termios->c_cflag & CRTSCTS)
+                up->mcr |= UART_MCR_AFE;
+        else
+                up->mcr &= ~UART_MCR_AFE;
+
         serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
         serial_out(up, UART_DLL, quot & 0xff);          /* LS of divisor */
         serial_out(up, UART_DLM, quot >> 8);            /* MS of divisor */
diff --git a/drivers/serial/serial_ks8695.c b/drivers/serial/serial_ks8695.c
index b9cbfc87f616..998e89dc5aaf 100644
--- a/drivers/serial/serial_ks8695.c
+++ b/drivers/serial/serial_ks8695.c
@@ -63,8 +63,44 @@
 #define UART_DUMMY_LSR_RX       0x100
 #define UART_PORT_SIZE          (KS8695_USR - KS8695_URRB + 4)
 
-#define tx_enabled(port) ((port)->unused[0])
-#define rx_enabled(port) ((port)->unused[1])
+static inline int tx_enabled(struct uart_port *port)
+{
+        return port->unused[0] & 1;
+}
+
+static inline int rx_enabled(struct uart_port *port)
+{
+        return port->unused[0] & 2;
+}
+
+static inline int ms_enabled(struct uart_port *port)
+{
+        return port->unused[0] & 4;
+}
+
+static inline void ms_enable(struct uart_port *port, int enabled)
+{
+        if(enabled)
+                port->unused[0] |= 4;
+        else
+                port->unused[0] &= ~4;
+}
+
+static inline void rx_enable(struct uart_port *port, int enabled)
+{
+        if(enabled)
+                port->unused[0] |= 2;
+        else
+                port->unused[0] &= ~2;
+}
+
+static inline void tx_enable(struct uart_port *port, int enabled)
+{
+        if(enabled)
+                port->unused[0] |= 1;
+        else
+                port->unused[0] &= ~1;
+}
 
 
 #ifdef SUPPORT_SYSRQ
@@ -75,7 +111,7 @@ static void ks8695uart_stop_tx(struct uart_port *port)
 {
         if (tx_enabled(port)) {
                 disable_irq(KS8695_IRQ_UART_TX);
-                tx_enabled(port) = 0;
+                tx_enable(port, 0);
         }
 }
 
@@ -83,7 +119,7 @@ static void ks8695uart_start_tx(struct uart_port *port)
 {
         if (!tx_enabled(port)) {
                 enable_irq(KS8695_IRQ_UART_TX);
-                tx_enabled(port) = 1;
+                tx_enable(port, 1);
         }
 }
 
@@ -91,18 +127,24 @@ static void ks8695uart_stop_rx(struct uart_port *port)
 {
         if (rx_enabled(port)) {
                 disable_irq(KS8695_IRQ_UART_RX);
-                rx_enabled(port) = 0;
+                rx_enable(port, 0);
         }
 }
 
 static void ks8695uart_enable_ms(struct uart_port *port)
 {
-        enable_irq(KS8695_IRQ_UART_MODEM_STATUS);
+        if (!ms_enabled(port)) {
+                enable_irq(KS8695_IRQ_UART_MODEM_STATUS);
+                ms_enable(port,1);
+        }
 }
 
 static void ks8695uart_disable_ms(struct uart_port *port)
 {
-        disable_irq(KS8695_IRQ_UART_MODEM_STATUS);
+        if (ms_enabled(port)) {
+                disable_irq(KS8695_IRQ_UART_MODEM_STATUS);
+                ms_enable(port,0);
+        }
 }
 
 static irqreturn_t ks8695uart_rx_chars(int irq, void *dev_id)
@@ -285,8 +327,9 @@ static int ks8695uart_startup(struct uart_port *port)
         int retval;
 
         set_irq_flags(KS8695_IRQ_UART_TX, IRQF_VALID | IRQF_NOAUTOEN);
-        tx_enabled(port) = 0;
-        rx_enabled(port) = 1;
+        tx_enable(port, 0);
+        rx_enable(port, 1);
+        ms_enable(port, 1);
 
         /*
          * Allocate the IRQ