[RFC PATCH v3 7/9] ethtool: add support to get/set CAN bit time register

[Dario Binacchi <dario.binacchi@amarulasolutions.com>]

Add ethtool support to get/set tunable values from/to the CAN bit time
register (btr).

CC: Marc Kleine-Budde <mkl@pengutronix.de>
CC: linux-can@vger.kernel.org
Suggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

(no changes since v1)

 include/uapi/linux/ethtool.h | 1 +
 net/ethtool/common.c         | 1 +
 net/ethtool/ioctl.c          | 1 +
 3 files changed, 3 insertions(+)

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index e0f0ee9bc89e..a2d24f689124 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -232,6 +232,7 @@ enum tunable_id {
 	ETHTOOL_TX_COPYBREAK,
 	ETHTOOL_PFC_PREVENTION_TOUT, /* timeout in msecs */
 	ETHTOOL_TX_COPYBREAK_BUF_SIZE,
+	ETHTOOL_CAN_BTR,
 	/*
 	 * Add your fresh new tunable attribute above and remember to update
 	 * tunable_strings[] in net/ethtool/common.c
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 566adf85e658..78f23b898243 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -90,6 +90,7 @@ tunable_strings[__ETHTOOL_TUNABLE_COUNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_TX_COPYBREAK]	= "tx-copybreak",
 	[ETHTOOL_PFC_PREVENTION_TOUT] = "pfc-prevention-tout",
 	[ETHTOOL_TX_COPYBREAK_BUF_SIZE] = "tx-copybreak-buf-size",
+	[ETHTOOL_CAN_BTR] = "can-btr",
 };
 
 const char
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 326e14ee05db..17b69d6fcab4 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2403,6 +2403,7 @@ static int ethtool_get_module_eeprom(struct net_device *dev,
 static int ethtool_tunable_valid(const struct ethtool_tunable *tuna)
 {
 	switch (tuna->id) {
+	case ETHTOOL_CAN_BTR:
 	case ETHTOOL_RX_COPYBREAK:
 	case ETHTOOL_TX_COPYBREAK:
 	case ETHTOOL_TX_COPYBREAK_BUF_SIZE:
-- 
2.32.0