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authorSascha Hauer <s.hauer@pengutronix.de>2016-09-29 12:51:23 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2016-09-29 14:27:06 +0200
commit068bc903c134722767913657a938e592a1fed1d6 (patch)
tree8fd4fa0a8e5082f1ee7d8a309ca907cf015fb31d /drivers/phy
parent081554dca90cdc59d6ca64f83125e741078ea0d9 (diff)
downloadbarebox-068bc903c134722767913657a938e592a1fed1d6.tar.gz
phy: Add usb-nop-xceiv support
Add a nop usb transcveiver driver. At the moment it does nothing, so is nothing more than a driver to satisfy the device tree dependencies. clk / vbus-regulator / vbus-detect-gpio support can be added later. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/phy')
-rw-r--r--drivers/phy/Kconfig15
-rw-r--r--drivers/phy/Makefile1
-rw-r--r--drivers/phy/usb-nop-xceiv.c104
3 files changed, 116 insertions, 4 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index e9461e1..b0c8b9b 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -2,9 +2,7 @@
# PHY
#
-menu "PHY Subsystem"
-
-config GENERIC_PHY
+menuconfig GENERIC_PHY
bool "PHY Core"
help
Generic PHY support.
@@ -15,4 +13,13 @@ config GENERIC_PHY
phy users can obtain reference to the PHY. All the users of this
framework should select this config.
-endmenu
+if GENERIC_PHY
+
+config USB_NOP_XCEIV
+ bool "Generic USB nop phy"
+ help
+ This driver is to be used by all the usb transceiver which are either
+ built-in with usb ip or which are autonomous and doesn't require any
+ phy programming such as ISP1x04 etc.
+
+endif
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 74514ae..8fc8595 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -3,3 +3,4 @@
#
obj-$(CONFIG_GENERIC_PHY) += phy-core.o
+obj-$(CONFIG_USB_NOP_XCEIV) += usb-nop-xceiv.o
diff --git a/drivers/phy/usb-nop-xceiv.c b/drivers/phy/usb-nop-xceiv.c
new file mode 100644
index 0000000..606e098
--- /dev/null
+++ b/drivers/phy/usb-nop-xceiv.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2016 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <of.h>
+#include <errno.h>
+#include <driver.h>
+#include <malloc.h>
+#include <usb/phy.h>
+#include <linux/phy/phy.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+struct nop_usbphy {
+ struct usb_phy usb_phy;
+ struct phy *phy;
+ struct phy_provider *provider;
+};
+
+static struct phy *nop_usbphy_xlate(struct device_d *dev,
+ struct of_phandle_args *args)
+{
+ struct nop_usbphy *nopphy = dev->priv;
+
+ return nopphy->phy;
+}
+
+static struct usb_phy *nop_usbphy_to_usbphy(struct phy *phy)
+{
+ struct nop_usbphy *nopphy = phy_get_drvdata(phy);
+
+ return &nopphy->usb_phy;
+}
+
+static const struct phy_ops nop_phy_ops = {
+ .to_usbphy = nop_usbphy_to_usbphy,
+};
+
+static int nop_usbphy_probe(struct device_d *dev)
+{
+ int ret;
+ struct nop_usbphy *nopphy;
+
+ nopphy = xzalloc(sizeof(*nopphy));
+
+ dev->priv = nopphy;
+
+ /* FIXME: Add clk support */
+ /* FIXME: Add vbus regulator support */
+ /* FIXME: Add vbus-detect-gpio support */
+
+ nopphy->usb_phy.dev = dev;
+ nopphy->phy = phy_create(dev, NULL, &nop_phy_ops, NULL);
+ if (IS_ERR(nopphy->phy)) {
+ ret = PTR_ERR(nopphy->phy);
+ goto err_free;
+ }
+
+ phy_set_drvdata(nopphy->phy, nopphy);
+
+ nopphy->provider = of_phy_provider_register(dev, nop_usbphy_xlate);
+ if (IS_ERR(nopphy->provider)) {
+ ret = PTR_ERR(nopphy->provider);
+ goto err_free;
+ }
+
+ return 0;
+err_free:
+ free(nopphy);
+
+ return ret;
+};
+
+static __maybe_unused struct of_device_id nop_usbphy_dt_ids[] = {
+ {
+ .compatible = "usb-nop-xceiv",
+ }, {
+ /* sentinel */
+ },
+};
+
+static struct driver_d nop_usbphy_driver = {
+ .name = "usb-nop-xceiv",
+ .probe = nop_usbphy_probe,
+ .of_compatible = DRV_OF_COMPAT(nop_usbphy_dt_ids),
+};
+
+static int nop_usbphy_init(void)
+{
+ return platform_driver_register(&nop_usbphy_driver);
+}
+fs_initcall(nop_usbphy_init);