scsi: ufs-mediatek: Add UFS support for Mediatek SoC chips

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Hello,

This patch series adds UFS M-PHY and UFS host driver support in MediaTek chipsets.

In the meantime, re-factors ufshcd_get_pwr_dev_param in vendors' drivers. This function is for vendors to decide finally agreed attributes for power mode change if vendors define
their host capability in struct ufs_dev_params. Because it is using by both ufs-qcom and ufs-hisi and also used in ufs-mediatek in this serious, simply re-factor it and then every vendors can reuse it.

Changes since v3:
-	dt-bindings: Use specific compatible name for both ufs-mediatek and phy-mtk-ufs, remove interrupt-parent and lanes-per-direction in ufs-mediatek, and fix descriptions.

Changes since v2:
-	Fix header style with SPDX-License-Identifier declaration used.
-	Simplify ufs-phy-mtk to single source file since we has one MPHY version now, and do fixes according to Chunfeng Yun's comments.
-	Add dt-bindings of ufs-phy-mtk.

Changes since v1:
-	Re-factor ufshcd_get_pwr_dev_param in mediatek/qcom/hisi vendor drivers.
-	Introduce ufs-phy-mtk to have a good extension capability for different power control flows in future different MPHY versions.
-	Bind ufs-phy-mtk and hook suitable callbacks in ufs-mediatek driver.
-	Use PA_LOCAL_TX_LCC_ENABLE attribute defined in unipro.h instead.
-	Do some minor format fixes.

Stanley Chu (7):
  scsi: ufs: Introduce ufshcd_get_pwr_dev_param
  scsi: ufs-qcom: Re-factor ufshcd_get_pwr_dev_param
  scsi: ufs-hisi: Re-factor ufshcd_get_pwr_dev_param
  dt-bindings: phy: Add document for phy-mtk-ufs
  dt-bindings: scsi: ufs: Add document for ufs-mediatek
  phy: mediatek: Add UFS M-PHY driver
  scsi: ufs-mediatek: Add UFS support for Mediatek SoC chips

 .../devicetree/bindings/phy/phy-mtk-ufs.txt   |  36 ++
 .../devicetree/bindings/ufs/ufs-mediatek.txt  |  44 +++
 drivers/phy/mediatek/Kconfig                  |   9 +
 drivers/phy/mediatek/Makefile                 |   1 +
 drivers/phy/mediatek/phy-mtk-ufs.c            | 239 ++++++++++++
 drivers/scsi/ufs/Kconfig                      |  14 +
 drivers/scsi/ufs/Makefile                     |   1 +
 drivers/scsi/ufs/ufs-hisi.c                   | 109 +-----
 drivers/scsi/ufs/ufs-mediatek.c               | 368 ++++++++++++++++++
 drivers/scsi/ufs/ufs-mediatek.h               |  54 +++
 drivers/scsi/ufs/ufs-qcom.c                   | 106 +----
 drivers/scsi/ufs/ufshcd-pltfrm.c              |  98 +++++
 drivers/scsi/ufs/ufshcd-pltfrm.h              |  21 +
 13 files changed, 893 insertions(+), 207 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/phy/phy-mtk-ufs.txt
 create mode 100644 Documentation/devicetree/bindings/ufs/ufs-mediatek.txt
 create mode 100644 drivers/phy/mediatek/phy-mtk-ufs.c
 create mode 100644 drivers/scsi/ufs/ufs-mediatek.c
 create mode 100644 drivers/scsi/ufs/ufs-mediatek.h




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