From: Sebastian Reichel <sre@kernel.org>
To: Sebastian Reichel <sre@kernel.org>,
Marcel Holtmann <marcel@holtmann.org>,
Gustavo Padovan <gustavo@padovan.org>,
Johan Hedberg <johan.hedberg@gmail.com>,
Rob Herring <robh+dt@kernel.org>
Cc: Samuel Thibault <samuel.thibault@ens-lyon.org>,
Pavel Machek <pavel@ucw.cz>, Tony Lindgren <tony@atomide.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>, Mark Rutland <mark.rutland@arm.com>,
linux-bluetooth@vger.kernel.org, linux-serial@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCHv3 04/10] serdev: add helpers for cts and rts handling
Date: Tue, 28 Mar 2017 17:59:33 +0200 [thread overview]
Message-ID: <20170328155939.31566-5-sre@kernel.org> (raw)
In-Reply-To: <20170328155939.31566-1-sre@kernel.org>
Add serdev helper functions for handling of cts and rts
lines using the serdev's tiocm functions.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
---
Changes since PATCHv2:
* use time_is_after_jiffies(xyz) instead of !time_after(jiffies, xyz)
* drop OUT2 handling in rts function
---
include/linux/serdev.h | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index e29a270f603c..37395b8eb8f1 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -16,6 +16,7 @@
#include <linux/types.h>
#include <linux/device.h>
#include <linux/termios.h>
+#include <linux/delay.h>
struct serdev_controller;
struct serdev_device;
@@ -254,6 +255,36 @@ static inline int serdev_device_write_room(struct serdev_device *sdev)
#endif /* CONFIG_SERIAL_DEV_BUS */
+static inline bool serdev_device_get_cts(struct serdev_device *serdev)
+{
+ int status = serdev_device_get_tiocm(serdev);
+ return !!(status & TIOCM_CTS);
+}
+
+static inline int serdev_device_wait_for_cts(struct serdev_device *serdev, bool state, int timeout_ms)
+{
+ unsigned long timeout;
+ bool signal;
+
+ timeout = jiffies + msecs_to_jiffies(timeout_ms);
+ while (time_is_after_jiffies(timeout)) {
+ signal = serdev_device_get_cts(serdev);
+ if (signal == state)
+ return 0;
+ usleep_range(1000, 2000);
+ }
+
+ return -ETIMEDOUT;
+}
+
+static inline int serdev_device_set_rts(struct serdev_device *serdev, bool enable)
+{
+ if (enable)
+ return serdev_device_set_tiocm(serdev, TIOCM_RTS, 0);
+ else
+ return serdev_device_set_tiocm(serdev, 0, TIOCM_RTS);
+}
+
/*
* serdev hooks into TTY core
*/
--
2.11.0
next prev parent reply other threads:[~2017-03-28 16:00 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-28 15:59 [PATCHv3 00/10] Nokia H4+ support Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 01/10] tty: serial: omap: add UPF_BOOT_AUTOCONF flag for DT init Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 02/10] serdev: add serdev_device_wait_until_sent Sebastian Reichel
2017-04-08 16:57 ` Greg Kroah-Hartman
2017-04-10 13:46 ` Rob Herring
2017-04-10 14:03 ` Greg Kroah-Hartman
2017-04-10 16:12 ` Rob Herring
2017-04-10 17:10 ` Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 03/10] serdev: implement get/set tiocm Sebastian Reichel
2017-03-28 15:59 ` Sebastian Reichel [this message]
2017-03-28 15:59 ` [PATCHv3 05/10] Bluetooth: hci_uart: add support for word alignment Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 06/10] Bluetooth: hci_uart: add serdev driver support library Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 07/10] Bluetooth: hci_serdev: do not open device in hci open Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 08/10] Bluetooth: hci_serdev: allow modular drivers Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 09/10] dt-bindings: net: bluetooth: Add nokia-bluetooth Sebastian Reichel
2017-03-28 15:59 ` [PATCHv3 10/10] Bluetooth: add nokia driver Sebastian Reichel
2017-03-29 21:17 ` [PATCHv3 00/10] Nokia H4+ support Rob Herring
2017-03-29 21:33 ` Marcel Holtmann
2017-03-31 13:33 ` Greg Kroah-Hartman
2017-04-05 18:16 ` Rob Herring
2017-04-05 20:28 ` Pavel Machek
2017-04-10 23:10 ` Sebastian Reichel
2017-04-11 11:36 ` Marcel Holtmann
2017-04-11 14:06 ` Greg Kroah-Hartman
2017-04-12 20:19 ` Marcel Holtmann
2017-04-13 0:26 ` Sebastian Reichel
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