phy: Add LVDS configuration options

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>

diff --git a/include/linux/phy/phy-lvds.h b/include/linux/phy/phy-lvds.h
new file mode 100644 (file)
index 0000000..09931d0
--- /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 f3286f4..b141375 100644 (file)
--- 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;
 };
 
 /**