From ef9042f99062f4fca179853bdd68101c97f8c5f0 Mon Sep 17 00:00:00 2001
From: Liu Ying <victor.liu@nxp.com>
Date: Tue, 19 Apr 2022 09:08:49 +0800
Subject: phy: Add LVDS configuration options
Git-commit: 3abfaefb9a6dda5e0bfa6160f55abfd0e32d8b0a
Patch-mainline: v5.19-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849

This patch allows LVDS PHYs to be configured through
the generic functions and through a custom structure
added to the generic union.

The parameters added here are based on common LVDS PHY
implementation practices.  The set of parameters
should cover all potential users.

Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Vinod Koul <vkoul@kernel.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Link: https://lore.kernel.org/r/20220419010852.452169-3-victor.liu@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 include/linux/phy/phy-lvds.h | 32 ++++++++++++++++++++++++++++++++
 include/linux/phy/phy.h      |  4 ++++
 2 files changed, 36 insertions(+)
 create mode 100644 include/linux/phy/phy-lvds.h

diff --git a/include/linux/phy/phy-lvds.h b/include/linux/phy/phy-lvds.h
new file mode 100644
index 000000000000..09931d080a6d
--- /dev/null
+++ b/include/linux/phy/phy-lvds.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2020,2022 NXP
+ */
+
+#ifndef __PHY_LVDS_H_
+#define __PHY_LVDS_H_
+
+/**
+ * struct phy_configure_opts_lvds - LVDS configuration set
+ * @bits_per_lane_and_dclk_cycle:	Number of bits per lane per differential
+ *					clock cycle.
+ * @differential_clk_rate:		Clock rate, in Hertz, of the LVDS
+ *					differential clock.
+ * @lanes:				Number of active, consecutive,
+ *					data lanes, starting from lane 0,
+ *					used for the transmissions.
+ * @is_slave:				Boolean, true if the phy is a slave
+ *					which works together with a master
+ *					phy to support dual link transmission,
+ *					otherwise a regular phy or a master phy.
+ *
+ * This structure is used to represent the configuration state of a LVDS phy.
+ */
+struct phy_configure_opts_lvds {
+	unsigned int	bits_per_lane_and_dclk_cycle;
+	unsigned long	differential_clk_rate;
+	unsigned int	lanes;
+	bool		is_slave;
+};
+
+#endif /* __PHY_LVDS_H_ */
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index f3286f4cd306..b1413757fcc3 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -17,6 +17,7 @@
 #include <linux/regulator/consumer.h>
 
 #include <linux/phy/phy-dp.h>
+#include <linux/phy/phy-lvds.h>
 #include <linux/phy/phy-mipi-dphy.h>
 
 struct phy;
@@ -57,10 +58,13 @@ enum phy_media {
  *		the MIPI_DPHY phy mode.
  * @dp:		Configuration set applicable for phys supporting
  *		the DisplayPort protocol.
+ * @lvds:	Configuration set applicable for phys supporting
+ *		the LVDS phy mode.
  */
 union phy_configure_opts {
 	struct phy_configure_opts_mipi_dphy	mipi_dphy;
 	struct phy_configure_opts_dp		dp;
+	struct phy_configure_opts_lvds		lvds;
 };
 
 /**
-- 
2.38.1