phy: add a NO-OP phy driver

This driver is used to stub PHY operations in a driver (USB, SATA).
This is useful when the 'client' driver (USB, SATA, ...) uses the PHY
framework and there is no actual PHY harwdare to drive.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

diff --git a/Documentation/devicetree/bindings/phy/no-op.txt b/Documentation/devicetree/bindings/phy/no-op.txt
new file mode 100644 (file)
index 0000000..a338112
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/no-op.txt
@@ -0,0 +1,16 @@
+NOP PHY driver
+
+This driver is used to stub PHY operations in a driver (USB, SATA).
+This is useful when the 'client' driver (USB, SATA, ...) uses the PHY framework
+and there is no actual PHY harwdare to drive.
+
+Required properties:
+- compatible     : must contain "nop-phy"
+- #phy-cells     : must contain <0>
+
+Example:
+
+nop_phy {
+       compatible = "nop-phy";
+       #phy-cells = <0>;
+};

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 7841554d091937c85d9aa5c0d118f8350785578f..98f2a1b04713f3dcc192aecc2299cb510e4523bf 100644 (file)
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -41,6 +41,24 @@ config PHY_SANDBOX
          This select a dummy sandbox PHY driver. It used only to implement
          the unit tests for the phy framework
 
+config NOP_PHY
+       bool "NOP PHY driver"
+       depends on PHY
+       help
+         Support for a no-op PHY driver (stubbed PHY driver).
+
+         This is useful when a driver uses the PHY framework but no real PHY
+         hardware exists.
+
+config SPL_NOP_PHY
+       bool "NOP PHY driver in SPL"
+       depends on SPL_PHY
+       help
+         Support for a no-op PHY driver (stubbed PHY driver) in the SPL.
+
+         This is useful when a driver uses the PHY framework but no real PHY
+         hardware exists.
+
 config PIPE3_PHY
        bool "Support omap's PIPE3 PHY"
        depends on PHY && ARCH_OMAP2PLUS

diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 6ce96d2cccb0c9cfd1ec11428d0b4f2545baa5f6..ab56c46bb45f8f012c94f8d331a2dabedaa97582 100644 (file)
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -6,5 +6,6 @@
 #
 
 obj-$(CONFIG_$(SPL_)PHY) += phy-uclass.o
+obj-$(CONFIG_$(SPL_)NOP_PHY) += nop-phy.o
 obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o
 obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o

diff --git a/drivers/phy/nop-phy.c b/drivers/phy/nop-phy.c
new file mode 100644 (file)
index 0000000..2201cc3
--- /dev/null
+++ b/drivers/phy/nop-phy.c
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ * Written by Jean-Jacques Hiblot  <jjhiblot@ti.com>
+ *
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <generic-phy.h>
+
+static const struct udevice_id nop_phy_ids[] = {
+       { .compatible = "nop-phy" },
+       { }
+};
+
+static struct phy_ops nop_phy_ops = {
+};
+
+U_BOOT_DRIVER(nop_phy) = {
+       .name   = "nop_phy",
+       .id     = UCLASS_PHY,
+       .of_match = nop_phy_ids,
+       .ops = &nop_phy_ops,
+};