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phy: Add LVDS configuration options 

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2071844
Depends: https://bugzilla.redhat.com/show_bug.cgi?id=2121508
Tested: This is one of a series of patch sets to enable Arm SystemReady IR
 support in the kernel for NXP i.MX8 platforms.  This set cleans up
 PHY handling for imx8m (and Tegra) in drivers/phy.  This set has been
 tested via simple boot tests, and of course the CI loop.  If the PHYs
 are not working, their devices aren't; everything appears to be
 working just fine.

commit 3abfaefb9a6dda5e0bfa6160f55abfd0e32d8b0a
Author: Liu Ying <victor.liu@nxp.com>
Date:   Tue Apr 19 09:08:49 2022 +0800

    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>
    (cherry picked from commit 3abfaefb9a6dda5e0bfa6160f55abfd0e32d8b0a)

Signed-off-by: Al Stone <ahs3@redhat.com>
This commit is contained in:
Al Stone 2022-10-13 10:24:02 -06:00
parent ece409e71a
commit 9f33cb631c
2 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
include/linux/phy/phy-lvds.h Normal file
View File

@ -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_ */

4
include/linux/phy/phy.h
View File

@ -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;
};
/**