Fix a Kconfig warning that is causing lots of build errors
when USB_SUPPORT is not set.

USB_PHY depends on USB_SUPPORT but "select" doesn't care about
dependencies, so this driver should also depend on USB_SUPPORT.
It should not select USB_SUPPORT.

WARNING: unmet direct dependencies detected for USB_PHY
  Depends on [n]: USB_SUPPORT [=n]
  Selected by [m]:
  - USB_LGM_PHY [=m]
Signed-off-by: NRandy Dunlap <rdunlap@infradead.org>
Cc: Li Yin <yin1.li@intel.com>
Cc: Vadivel Murugan R <vadivel.muruganx.ramuthevar@linux.intel.com>
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/d1dd0ddd-3143-5777-1c63-195e1a32f237@infradead.orgSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add USB + SGMII/QSGMII multilink configuration sequences.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-14-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add PCIe + USB Unique SSC multilink configuration sequences.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-13-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add support for single link USB configuration.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-12-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add support for single link SGMII/QSGMII configuration.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-11-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Include PHY_PLL_CFG as a first register value to configure in
link_cmn_vals array values.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-10-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add support to configure link_cmn_vals and xcvr_diag_vals in case of single
link PHY configuration.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-9-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Prepare and enable clock in probe instead of phy_init.
Also, remove phy_exit callback.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-8-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

For multilink configuration, deassert PHY and link reset after PHY
registers are configured in probe and only check link status in
power_on callback.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-7-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Added support for multilink configuration of Torrent PHY. Currently,
maximum two links are supported. In case of multilink configuration,
PHY needs to be configured for both the protocols simultaneously at
the beginning as per the requirement of Torrent PHY.
Also, register sequences for PCIe + SGMII/QSGMII Unique SSC PHY multilink
configurations are added.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-6-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add definition for QSGMII phy type.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Acked-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1600327846-9733-5-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add support for PHY APB reset and make it optional.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-4-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Check if cmn_ready is set after both PLL0 and PLL1 are locked.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-3-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add single link PCIe register sequences in Torrent PHY driver.
Also, add support for getting SSC type from DT.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600327846-9733-2-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Torrent PHY can be used in different multi-link multi-protocol
configurations including protocols other than DisplayPort also,
such as PCIe, USB, SGMII, QSGMII etc. Update the bindings to have
support for these configurations.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600280911-9214-8-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add binding to specify Spread Spectrum Clocking mode used.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1600280911-9214-7-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add checking if total number of lanes for all subnodes is not greater than
number of lanes supported by PHY.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600280911-9214-6-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Added separate functions for regmap initialization of torrent PHY
generic registers and DP specific registers.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600280911-9214-5-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Enable support for multiple subnodes in torrent PHY to
include multi-link combinations.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600280911-9214-4-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use devm_platform_ioremap_resource() to get register addresses instead of
boilerplate code.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600280911-9214-3-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use of_device_get_match_data() to get driver data instead of boilerplate
code.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Link: https://lore.kernel.org/r/1600280911-9214-2-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add support for eMMC PHY on Intel Keem Bay SoC.
Signed-off-by: NWan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com>
Reviewed-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200913235522.4316-4-wan.ahmad.zainie.wan.mohamad@intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Binding description for Intel Keem Bay eMMC PHY.
Signed-off-by: NWan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200913235522.4316-3-wan.ahmad.zainie.wan.mohamad@intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Rename phy-intel-{combo,emmc}.c to phy-intel-lgm-{combo,emmc}.c
to make drivers/phy/intel directory more generic for future use.
Signed-off-by: NWan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com>
Reviewed-by: NRamuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Link: https://lore.kernel.org/r/20200913235522.4316-2-wan.ahmad.zainie.wan.mohamad@intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

The regmap_config structs are never modified and can be made const to
allow the compiler to put them in read-only memory.
Signed-off-by: NRikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200912204639.501669-4-rikard.falkeborn@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

cdns_nxp_sequence_pair[] are never modified and can be made const to allow
the compiler to put them in read-only memory.
Signed-off-by: NRikard Falkeborn <rikard.falkeborn@gmail.com>
Reviewed-by: NPeter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20200912204639.501669-3-rikard.falkeborn@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

The static cdns_reg_pairs and regmap_config structs are not modified and
can be made const. This allows the compiler to put them in read-only
memory.
Signed-off-by: NRikard Falkeborn <rikard.falkeborn@gmail.com>
Link: https://lore.kernel.org/r/20200912204639.501669-2-rikard.falkeborn@gmail.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Set Torrent PHY attributes bus_width, max_link_rate and mode
for DisplayPort.
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/1599805114-22063-3-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add new PHY attribute max_link_rate to struct phy_attrs. This indicates
maximum link rate supported by PHY (in Mbps).
Signed-off-by: NYuti Amonkar <yamonkar@cadence.com>
Signed-off-by: NSwapnil Jakhade <sjakhade@cadence.com>
Reviewed-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: NKishon Vijay Abraham I <kishon@ti.com>
Link: https://lore.kernel.org/r/1599805114-22063-2-git-send-email-sjakhade@cadence.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add support for USB PHY on Intel LGM SoC.
Signed-off-by: NRamuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Reviewed-by: NPhilipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20200828022312.52724-3-vadivel.muruganx.ramuthevar@linux.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Add the dt-schema to support USB PHY on Intel LGM SoC
Signed-off-by: NRamuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200828022312.52724-2-vadivel.muruganx.ramuthevar@linux.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Move ti,omap-usb2 to its own YAML schema.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200831142130.21836-1-rogerq@ti.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

On K3 AM654x/J721E platforms the Port MII mode selection register(s) have
similar format and placed in the System Control Module (SCM) module
sequentially as one register per port, but, depending SOC and CPSW
instance, the base offset and number of ports can be different.

Hence, add possibility to retrieve number of ports and base registers
offset from DT and support for max possible number of ports supported by K3
SoCs like J721E.
Signed-off-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20200828201943.29155-4-grygorii.strashko@ti.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use features mask during PHYs initialization to simplify code.
Signed-off-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20200828201943.29155-3-grygorii.strashko@ti.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Move phy initialization in separate function to improve code readability
and simplify future changes.
Signed-off-by: NGrygorii Strashko <grygorii.strashko@ti.com>
Link: https://lore.kernel.org/r/20200828201943.29155-2-grygorii.strashko@ti.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use readl_poll_timeout() to simplify code
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1598320987-25518-6-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use readl_poll_timeout() to simplify code
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1598320987-25518-5-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use readl_relaxed_poll_timeout() to simplify code, rename local function
read_poll_timeout() as poll_timeout() to avoid repeated definition
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1598320987-25518-4-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

Use readl_poll_timeout_atomic() to simplify code
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1598320987-25518-3-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: NVinod Koul <vkoul@kernel.org>