7 files changed, 32 insertions, 11 deletions

diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 247d89478f24..f590afc1f673 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -107,18 +107,18 @@ static void omap_uart_set_noidle(struct platform_device *pdev)
         omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO);
 }
 
-static void omap_uart_set_forceidle(struct platform_device *pdev)
+static void omap_uart_set_smartidle(struct platform_device *pdev)
 {
         struct omap_device *od = to_omap_device(pdev);
 
-        omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_FORCE);
+        omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_SMART);
 }
 
 #else
 static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable)
 {}
 static void omap_uart_set_noidle(struct platform_device *pdev) {}
-static void omap_uart_set_forceidle(struct platform_device *pdev) {}
+static void omap_uart_set_smartidle(struct platform_device *pdev) {}
 #endif /* CONFIG_PM */
 
 #ifdef CONFIG_OMAP_MUX
@@ -349,7 +349,7 @@ void __init omap_serial_init_port(struct omap_board_data *bdata,
         omap_up.uartclk = OMAP24XX_BASE_BAUD * 16;
         omap_up.flags = UPF_BOOT_AUTOCONF;
         omap_up.get_context_loss_count = omap_pm_get_dev_context_loss_count;
-        omap_up.set_forceidle = omap_uart_set_forceidle;
+        omap_up.set_forceidle = omap_uart_set_smartidle;
         omap_up.set_noidle = omap_uart_set_noidle;
         omap_up.enable_wakeup = omap_uart_enable_wakeup;
         omap_up.dma_rx_buf_size = info->dma_rx_buf_size;
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c
index 9f50c4e3c2be..9b7336fcfbb3 100644
--- a/drivers/tty/serial/8250/8250.c
+++ b/drivers/tty/serial/8250/8250.c
@@ -45,7 +45,7 @@
 #include "8250.h"
 
 #ifdef CONFIG_SPARC
-#include "suncore.h"
+#include "../suncore.h"
 #endif
 
 /*
diff --git a/drivers/tty/serial/8250/m32r_sio.c b/drivers/tty/serial/m32r_sio.c
index 94a6792bf97b..94a6792bf97b 100644
--- a/drivers/tty/serial/8250/m32r_sio.c
+++ b/drivers/tty/serial/m32r_sio.c
diff --git a/drivers/tty/serial/8250/m32r_sio.h b/drivers/tty/serial/m32r_sio.h
index e9b7e11793b1..e9b7e11793b1 100644
--- a/drivers/tty/serial/8250/m32r_sio.h
+++ b/drivers/tty/serial/m32r_sio.h
diff --git a/drivers/tty/serial/8250/m32r_sio_reg.h b/drivers/tty/serial/m32r_sio_reg.h
index 4671473793e3..4671473793e3 100644
--- a/drivers/tty/serial/8250/m32r_sio_reg.h
+++ b/drivers/tty/serial/m32r_sio_reg.h
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 1c2426931484..f80904145fd4 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -46,6 +46,13 @@
 
 #define DEFAULT_CLK_SPEED 48000000 /* 48Mhz*/
 
+/* SCR register bitmasks */
+#define OMAP_UART_SCR_RX_TRIG_GRANU1_MASK               (1 << 7)
+
+/* FCR register bitmasks */
+#define OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT                6
+#define OMAP_UART_FCR_RX_FIFO_TRIG_MASK                 (0x3 << 6)
+
 static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS];
 
 /* Forward declaration of functions */
@@ -129,6 +136,7 @@ static void serial_omap_enable_ms(struct uart_port *port)
 static void serial_omap_stop_tx(struct uart_port *port)
 {
         struct uart_omap_port *up = (struct uart_omap_port *)port;
+        struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
 
         if (up->use_dma &&
                 up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) {
@@ -151,6 +159,9 @@ static void serial_omap_stop_tx(struct uart_port *port)
                 serial_out(up, UART_IER, up->ier);
         }
 
+        if (!up->use_dma && pdata->set_forceidle)
+                pdata->set_forceidle(up->pdev);
+
         pm_runtime_mark_last_busy(&up->pdev->dev);
         pm_runtime_put_autosuspend(&up->pdev->dev);
 }
@@ -279,6 +290,7 @@ static inline void serial_omap_enable_ier_thri(struct uart_omap_port *up)
 static void serial_omap_start_tx(struct uart_port *port)
 {
         struct uart_omap_port *up = (struct uart_omap_port *)port;
+        struct omap_uart_port_info *pdata = up->pdev->dev.platform_data;
         struct circ_buf *xmit;
         unsigned int start;
         int ret = 0;
@@ -286,6 +298,8 @@ static void serial_omap_start_tx(struct uart_port *port)
         if (!up->use_dma) {
                 pm_runtime_get_sync(&up->pdev->dev);
                 serial_omap_enable_ier_thri(up);
+                if (pdata->set_noidle)
+                        pdata->set_noidle(up->pdev);
                 pm_runtime_mark_last_busy(&up->pdev->dev);
                 pm_runtime_put_autosuspend(&up->pdev->dev);
                 return;
@@ -726,8 +740,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
         quot = serial_omap_get_divisor(port, baud);
 
         /* calculate wakeup latency constraint */
-        up->calc_latency = (1000000 * up->port.fifosize) /
-                                (1000 * baud / 8);
+        up->calc_latency = (USEC_PER_SEC * up->port.fifosize) / (baud / 8);
         up->latency = up->calc_latency;
         schedule_work(&up->qos_work);
 
@@ -811,14 +824,21 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios,
         up->mcr = serial_in(up, UART_MCR);
         serial_out(up, UART_MCR, up->mcr | UART_MCR_TCRTLR);
         /* FIFO ENABLE, DMA MODE */
-        serial_out(up, UART_FCR, up->fcr);
-        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
+
+        up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK;
 
         if (up->use_dma) {
                 serial_out(up, UART_TI752_TLR, 0);
-                up->scr |= (UART_FCR_TRIGGER_4 | UART_FCR_TRIGGER_8);
+                up->scr |= UART_FCR_TRIGGER_4;
+        } else {
+                /* Set receive FIFO threshold to 1 byte */
+                up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK;
+                up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT);
         }
 
+        serial_out(up, UART_FCR, up->fcr);
+        serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B);
+
         serial_out(up, UART_OMAP_SCR, up->scr);
 
         serial_out(up, UART_EFR, up->efr);
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index f96f37b5fec6..c55e5fb16fa3 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1593,7 +1593,8 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
 #define S5PV210_SERIAL_DRV_DATA (kernel_ulong_t)NULL
 #endif
 
-#ifdef CONFIG_CPU_EXYNOS4210
+#if defined(CONFIG_CPU_EXYNOS4210) || defined(CONFIG_SOC_EXYNOS4212) || \
+        defined(CONFIG_SOC_EXYNOS4412) || defined(CONFIG_SOC_EXYNOS5250)
 static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = {
         .info = &(struct s3c24xx_uart_info) {
                 .name           = "Samsung Exynos4 UART",