The Cadence D-PHY can be configured in Tx (DSI) mode or Rx (CSI) mode.
Both modes have a different programming sequence and share little among
them. In addition, a PHY configured in Tx mode cannot be used in Rx mode
and vice versa. For this reason, create a separate driver for the Rx
mode to make it easier to read and maintain.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://lore.kernel.org/r/20220301111621.2992275-2-p.yadav@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Sierra has two PLLs, PLL_CMNLC and PLL_CMNLC1 and each of these PLLs has
two inputs, plllc_refclk (input from pll0_refclk) and refrcv (input from
pll1_refclk). Model PLL_CMNLC and PLL_CMNLC1 as clocks so that it's
possible to select one of these two inputs from device tree.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/20210319124128.13308-13-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
cmn_refclk_<p/m> lines in Torrent SERDES is used for connecting external
reference clock. cmn_refclk_<p/m> can also be configured to output the
reference clock. Model this derived reference clock as a "clock" so that
platforms like AM642 EVM can enable it.
This is used by PCIe to use the same refclk both in local SERDES
and remote device. Add support here to drive refclk out.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Reviewed-by: Swapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/20210310120840.16447-7-kishon@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Cadence SALVO PHY is a 28nm product, and is only used for USB3 & USB2.
According to the Cadence, this PHY is a legacy Module, and Sierra and
Torrent are later evolutions from it, and their sequence overlap is
minimal, meaning we cannot reuse either (Sierra & Torrent) of the PHY
drivers.
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Rename Cadence DP PHY driver from phy-cadence-dp to phy-cadence-torrent
to make it more generic for future use. Modifiy Makefile and Kconfig
accordingly. Also, change driver compatible from "cdns,dp-phy" to
"cdns,torrent-phy".This will not affect ABI as the driver has never
been functional, and therefore do not exist in any active use case.
Signed-off-by: Yuti Amonkar <yamonkar@cadence.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cadence has designed a D-PHY that can be used by the, currently in tree,
DSI bridge (DRM), CSI Transceiver and CSI Receiver (v4l2) drivers.
Only the DSI driver has an ad-hoc driver for that phy at the moment, while
the v4l2 drivers are completely missing any phy support. In order to make
that phy support available to all these drivers, without having to
duplicate that code three times, let's create a generic phy framework
driver.
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Add a Sierra PHY driver with PCIe and USB support.
The PHY has multiple lanes, which can be configured into
groups, and a generic PHY device is created for each group.
There are two resets controlling the overall PHY block, one
to enable the APB interface for programming registers, and
another to enable the PHY itself. Additionally there are
resets for each PHY lane.
The PHY can be configured in hardware to read register
settings from ROM, or they can be written by the driver.
The sequence of operation on startup is to enable the APB
bus, write the PHY registers (if required) for each lane
group, and then enable the PHY. Each group of lanes
can then be individually controlled using the power_on()/
power_off() function for that generic PHY
Signed-off-by: Alan Douglas <adouglas@cadence.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Add driver for the Cadence SD0801 "Torrent" PHY used with the Cadence MHDP
DisplayPort Tx controller.
Integration with the MHDP driver will be the subject of another commit.
Signed-off-by: Scott Telford <stelford@cadence.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
