Add Intel ComboPhy driver

This patch series adds Intel ComboPhy driver, respective yaml schemas

Changes on v9:
Add Acked-By: Vinod Koul <[email protected]>

Fix compiler warning
drivers/phy/intel/phy-intel-combo.c:229:6: warning: cb_mode may be used uninitialized in this function [-Wmaybe-uninitialized]
ret = regmap_write(cbphy->hsiocfg, REG_COMBO_MODE(cbphy->bid), cb_mode); ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/phy/intel/phy-intel-combo.c:204:24: note: cb_mode was declared here
enum intel_combo_mode cb_mode;

Changes on v8:
As per PHY Maintainer's request add description in comments for doing register access through register map framework.

Changes on v7:
As per System control driver maintainer's inputs remove
fwnode_to_regmap() definition and use device_node_get_regmap()

Changes on v6:
Rebase patches on the latest maintainer's branch
https://git.kernel.org/pub/scm/linux/kernel/git/kishon/linux-phy.git/?h=phy-for-5.7
Dilip Kota (3):
dt-bindings: phy: Add PHY_TYPE_XPCS definition
dt-bindings: phy: Add YAML schemas for Intel ComboPhy
phy: intel: Add driver support for ComboPhy

 .../devicetree/bindings/phy/intel,combo-phy.yaml   | 101 ++++
 drivers/phy/intel/Kconfig                          |  14 +
 drivers/phy/intel/Makefile                         |   1 +
 drivers/phy/intel/phy-intel-combo.c                | 632 +++++++++++++++++++++
 include/dt-bindings/phy/phy.h                      |   1 +
 5 files changed, 749 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/phy/intel,combo-phy.yaml
 create mode 100644 drivers/phy/intel/phy-intel-combo.c

2.11.0