[PATCH 2/4] phy: Add LVDS configuration options

From: Liu Ying <victor.liu@nxp.com>
To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
	dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org
Cc: kishon@ti.com, vkoul@kernel.org, robh+dt@kernel.org,
	a.hajda@samsung.com, narmstrong@baylibre.com,
	Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se,
	jernej.skrabec@siol.net, airlied@linux.ie, daniel@ffwll.ch,
	shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
	agx@sigxcpu.org, robert.chiras@nxp.com,
	martin.kepplinger@puri.sm
Subject: [PATCH 2/4] phy: Add LVDS configuration options
Date: Fri,  4 Dec 2020 15:33:42 +0800	[thread overview]
Message-ID: <1607067224-15616-3-git-send-email-victor.liu@nxp.com> (raw)
In-Reply-To: <1607067224-15616-1-git-send-email-victor.liu@nxp.com>

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>
---
 include/linux/phy/phy-lvds.h | 48 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/phy/phy.h      |  4 ++++
 2 files changed, 52 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 00000000..1b5b9d6
--- /dev/null
+++ b/include/linux/phy/phy-lvds.h
@@ -0,0 +1,48 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2020 NXP
+ */
+
+#ifndef __PHY_LVDS_H_
+#define __PHY_LVDS_H_
+
+/**
+ * struct phy_configure_opts_lvds - LVDS configuration set
+ *
+ * This structure is used to represent the configuration state of a
+ * LVDS phy.
+ */
+struct phy_configure_opts_lvds {
+	/**
+	 * @bits_per_lane_and_dclk_cycle:
+	 *
+	 * Number of bits per data lane and differential clock cycle.
+	 */
+	unsigned int bits_per_lane_and_dclk_cycle;
+
+	/**
+	 * @differential_clk_rate:
+	 *
+	 * Clock rate, in Hertz, of the LVDS differential clock.
+	 */
+	unsigned long differential_clk_rate;
+
+	/**
+	 * @lanes:
+	 *
+	 * Number of active, consecutive, data lanes, starting from
+	 * lane 0, used for the transmissions.
+	 */
+	unsigned int lanes;
+
+	/**
+	 * @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.
+	 */
+	bool is_slave;
+};
+
+#endif /* __PHY_LVDS_H_ */
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index e435bdb..d450b44 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;
@@ -51,10 +52,13 @@ enum phy_mode {
  *		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;
 };
 
 /**
-- 
2.7.4

