These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 12 insertions, 33 deletions

diff --git a/kernel/drivers/tty/serial/omap-serial.c b/kernel/drivers/tty/serial/omap-serial.c
index f9d192f67..9745fb8b7 100644
--- a/kernel/drivers/tty/serial/omap-serial.c
+++ b/kernel/drivers/tty/serial/omap-serial.c
@@ -38,6 +38,7 @@
 #include <linux/serial_core.h>
 #include <linux/irq.h>
 #include <linux/pm_runtime.h>
+#include <linux/pm_wakeirq.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
 #include <linux/gpio.h>
@@ -160,7 +161,6 @@ struct uart_omap_port {
 	unsigned long		port_activity;
 	int			context_loss_cnt;
 	u32			errata;
-	u8			wakeups_enabled;
 	u32			features;
 
 	int			rts_gpio;
@@ -199,6 +199,7 @@ static inline void serial_omap_clear_fifos(struct uart_omap_port *up)
 	serial_out(up, UART_FCR, 0);
 }
 
+#ifdef CONFIG_PM
 static int serial_omap_get_context_loss_count(struct uart_omap_port *up)
 {
 	struct omap_uart_port_info *pdata = dev_get_platdata(up->dev);
@@ -209,33 +210,17 @@ static int serial_omap_get_context_loss_count(struct uart_omap_port *up)
 	return pdata->get_context_loss_count(up->dev);
 }
 
-static inline void serial_omap_enable_wakeirq(struct uart_omap_port *up,
-				       bool enable)
-{
-	if (!up->wakeirq)
-		return;
-
-	if (enable)
-		enable_irq(up->wakeirq);
-	else
-		disable_irq_nosync(up->wakeirq);
-}
-
+/* REVISIT: Remove this when omap3 boots in device tree only mode */
 static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable)
 {
 	struct omap_uart_port_info *pdata = dev_get_platdata(up->dev);
 
-	if (enable == up->wakeups_enabled)
-		return;
-
-	serial_omap_enable_wakeirq(up, enable);
-	up->wakeups_enabled = enable;
-
 	if (!pdata || !pdata->enable_wakeup)
 		return;
 
 	pdata->enable_wakeup(up->dev, enable);
 }
+#endif /* CONFIG_PM */
 
 /*
  * Calculate the absolute difference between the desired and actual baud
@@ -750,13 +735,11 @@ static int serial_omap_startup(struct uart_port *port)
 
 	/* Optional wake-up IRQ */
 	if (up->wakeirq) {
-		retval = request_irq(up->wakeirq, serial_omap_irq,
-				     up->port.irqflags, up->name, up);
+		retval = dev_pm_set_dedicated_wake_irq(up->dev, up->wakeirq);
 		if (retval) {
 			free_irq(up->port.irq, up);
 			return retval;
 		}
-		disable_irq(up->wakeirq);
 	}
 
 	dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line);
@@ -845,8 +828,7 @@ static void serial_omap_shutdown(struct uart_port *port)
 	pm_runtime_mark_last_busy(up->dev);
 	pm_runtime_put_autosuspend(up->dev);
 	free_irq(up->port.irq, up);
-	if (up->wakeirq)
-		free_irq(up->wakeirq, up);
+	dev_pm_clear_wake_irq(up->dev);
 }
 
 static void serial_omap_uart_qos_work(struct work_struct *work)
@@ -1139,13 +1121,6 @@ serial_omap_pm(struct uart_port *port, unsigned int state,
 	serial_out(up, UART_EFR, efr);
 	serial_out(up, UART_LCR, 0);
 
-	if (!device_may_wakeup(up->dev)) {
-		if (!state)
-			pm_runtime_forbid(up->dev);
-		else
-			pm_runtime_allow(up->dev);
-	}
-
 	pm_runtime_mark_last_busy(up->dev);
 	pm_runtime_put_autosuspend(up->dev);
 }
@@ -1364,7 +1339,7 @@ static inline void serial_omap_add_console_port(struct uart_omap_port *up)
 
 /* Enable or disable the rs485 support */
 static int
-serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
+serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485)
 {
 	struct uart_omap_port *up = to_uart_omap_port(port);
 	unsigned int mode;
@@ -1377,8 +1352,12 @@ serial_omap_config_rs485(struct uart_port *port, struct serial_rs485 *rs485conf)
 	up->ier = 0;
 	serial_out(up, UART_IER, 0);
 
+	/* Clamp the delays to [0, 100ms] */
+	rs485->delay_rts_before_send = min(rs485->delay_rts_before_send, 100U);
+	rs485->delay_rts_after_send  = min(rs485->delay_rts_after_send, 100U);
+
 	/* store new config */
-	port->rs485 = *rs485conf;
+	port->rs485 = *rs485;
 
 	/*
 	 * Just as a precaution, only allow rs485