From 926eae604403acfa27ba5b072af458e87e634a50 Mon Sep 17 00:00:00 2001 From: Holger Brunck Date: Thu, 10 Feb 2022 18:48:23 +0100 Subject: dsa: mv88e6xxx: make serdes SGMII/Fiber tx amplitude configurable MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The mv88e6352, mv88e6240 and mv88e6176 have a serdes interface. This patch allows to configure the output swing to a desired value in the phy-handle of the port. The value which is peak to peak has to be specified in microvolts. As the chips only supports eight dedicated values we return EINVAL if the value in the DTS does not match one of these values. Signed-off-by: Holger Brunck Reviewed-by: Andrew Lunn Reviewed-by: Marek Behún Signed-off-by: David S. Miller --- drivers/net/dsa/mv88e6xxx/chip.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/net/dsa/mv88e6xxx/chip.h') diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h index 12aa637779f5..30b92a265613 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.h +++ b/drivers/net/dsa/mv88e6xxx/chip.h @@ -588,6 +588,10 @@ struct mv88e6xxx_ops { void (*serdes_get_regs)(struct mv88e6xxx_chip *chip, int port, void *_p); + /* SERDES SGMII/Fiber Output Amplitude */ + int (*serdes_set_tx_amplitude)(struct mv88e6xxx_chip *chip, int port, + int val); + /* Address Translation Unit operations */ int (*atu_get_hash)(struct mv88e6xxx_chip *chip, u8 *hash); int (*atu_set_hash)(struct mv88e6xxx_chip *chip, u8 hash); -- cgit