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Diffstat (limited to 'target/linux/brcm63xx/patches-4.9/001-4.12-07-mdio_bus-Issue-GPIO-RESET-to-PHYs.patch')
-rw-r--r--target/linux/brcm63xx/patches-4.9/001-4.12-07-mdio_bus-Issue-GPIO-RESET-to-PHYs.patch192
1 files changed, 0 insertions, 192 deletions
diff --git a/target/linux/brcm63xx/patches-4.9/001-4.12-07-mdio_bus-Issue-GPIO-RESET-to-PHYs.patch b/target/linux/brcm63xx/patches-4.9/001-4.12-07-mdio_bus-Issue-GPIO-RESET-to-PHYs.patch
deleted file mode 100644
index eb72f6a82c..0000000000
--- a/target/linux/brcm63xx/patches-4.9/001-4.12-07-mdio_bus-Issue-GPIO-RESET-to-PHYs.patch
+++ /dev/null
@@ -1,192 +0,0 @@
-From 69226896ad636b94f6d2e55d75ff21a29c4de83b Mon Sep 17 00:00:00 2001
-From: Roger Quadros <rogerq@ti.com>
-Date: Fri, 21 Apr 2017 16:15:38 +0300
-Subject: [PATCH] mdio_bus: Issue GPIO RESET to PHYs.
-
-Some boards [1] leave the PHYs at an invalid state
-during system power-up or reset thus causing unreliability
-issues with the PHY which manifests as PHY not being detected
-or link not functional. To fix this, these PHYs need to be RESET
-via a GPIO connected to the PHY's RESET pin.
-
-Some boards have a single GPIO controlling the PHY RESET pin of all
-PHYs on the bus whereas some others have separate GPIOs controlling
-individual PHY RESETs.
-
-In both cases, the RESET de-assertion cannot be done in the PHY driver
-as the PHY will not probe till its reset is de-asserted.
-So do the RESET de-assertion in the MDIO bus driver.
-
-[1] - am572x-idk, am571x-idk, a437x-idk
-
-Signed-off-by: Roger Quadros <rogerq@ti.com>
-Signed-off-by: David S. Miller <davem@davemloft.net>
----
- Documentation/devicetree/bindings/net/mdio.txt | 33 ++++++++++++++++++
- drivers/net/phy/mdio_bus.c | 47 ++++++++++++++++++++++++++
- drivers/of/of_mdio.c | 7 ++++
- include/linux/phy.h | 7 ++++
- 4 files changed, 94 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/net/mdio.txt
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/net/mdio.txt
-@@ -0,0 +1,33 @@
-+Common MDIO bus properties.
-+
-+These are generic properties that can apply to any MDIO bus.
-+
-+Optional properties:
-+- reset-gpios: List of one or more GPIOs that control the RESET lines
-+ of the PHYs on that MDIO bus.
-+- reset-delay-us: RESET pulse width in microseconds as per PHY datasheet.
-+
-+A list of child nodes, one per device on the bus is expected. These
-+should follow the generic phy.txt, or a device specific binding document.
-+
-+Example :
-+This example shows these optional properties, plus other properties
-+required for the TI Davinci MDIO driver.
-+
-+ davinci_mdio: ethernet@0x5c030000 {
-+ compatible = "ti,davinci_mdio";
-+ reg = <0x5c030000 0x1000>;
-+ #address-cells = <1>;
-+ #size-cells = <0>;
-+
-+ reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
-+ reset-delay-us = <2>; /* PHY datasheet states 1us min */
-+
-+ ethphy0: ethernet-phy@1 {
-+ reg = <1>;
-+ };
-+
-+ ethphy1: ethernet-phy@3 {
-+ reg = <3>;
-+ };
-+ };
---- a/drivers/net/phy/mdio_bus.c
-+++ b/drivers/net/phy/mdio_bus.c
-@@ -22,8 +22,11 @@
- #include <linux/init.h>
- #include <linux/delay.h>
- #include <linux/device.h>
-+#include <linux/gpio.h>
-+#include <linux/gpio/consumer.h>
- #include <linux/of_device.h>
- #include <linux/of_mdio.h>
-+#include <linux/of_gpio.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
-@@ -304,6 +307,7 @@ int __mdiobus_register(struct mii_bus *b
- {
- struct mdio_device *mdiodev;
- int i, err;
-+ struct gpio_desc *gpiod;
-
- if (NULL == bus || NULL == bus->name ||
- NULL == bus->read || NULL == bus->write)
-@@ -329,6 +333,35 @@ int __mdiobus_register(struct mii_bus *b
- if (bus->reset)
- bus->reset(bus);
-
-+ /* de-assert bus level PHY GPIO resets */
-+ if (bus->num_reset_gpios > 0) {
-+ bus->reset_gpiod = devm_kcalloc(&bus->dev,
-+ bus->num_reset_gpios,
-+ sizeof(struct gpio_desc *),
-+ GFP_KERNEL);
-+ if (!bus->reset_gpiod)
-+ return -ENOMEM;
-+ }
-+
-+ for (i = 0; i < bus->num_reset_gpios; i++) {
-+ gpiod = devm_gpiod_get_index(&bus->dev, "reset", i,
-+ GPIOD_OUT_LOW);
-+ if (IS_ERR(gpiod)) {
-+ err = PTR_ERR(gpiod);
-+ if (err != -ENOENT) {
-+ dev_err(&bus->dev,
-+ "mii_bus %s couldn't get reset GPIO\n",
-+ bus->id);
-+ return err;
-+ }
-+ } else {
-+ bus->reset_gpiod[i] = gpiod;
-+ gpiod_set_value_cansleep(gpiod, 1);
-+ udelay(bus->reset_delay_us);
-+ gpiod_set_value_cansleep(gpiod, 0);
-+ }
-+ }
-+
- for (i = 0; i < PHY_MAX_ADDR; i++) {
- if ((bus->phy_mask & (1 << i)) == 0) {
- struct phy_device *phydev;
-@@ -354,6 +387,13 @@ error:
- mdiodev->device_remove(mdiodev);
- mdiodev->device_free(mdiodev);
- }
-+
-+ /* Put PHYs in RESET to save power */
-+ for (i = 0; i < bus->num_reset_gpios; i++) {
-+ if (bus->reset_gpiod[i])
-+ gpiod_set_value_cansleep(bus->reset_gpiod[i], 1);
-+ }
-+
- device_del(&bus->dev);
- return err;
- }
-@@ -375,6 +415,13 @@ void mdiobus_unregister(struct mii_bus *
- mdiodev->device_remove(mdiodev);
- mdiodev->device_free(mdiodev);
- }
-+
-+ /* Put PHYs in RESET to save power */
-+ for (i = 0; i < bus->num_reset_gpios; i++) {
-+ if (bus->reset_gpiod[i])
-+ gpiod_set_value_cansleep(bus->reset_gpiod[i], 1);
-+ }
-+
- device_del(&bus->dev);
- }
- EXPORT_SYMBOL(mdiobus_unregister);
---- a/drivers/of/of_mdio.c
-+++ b/drivers/of/of_mdio.c
-@@ -22,6 +22,8 @@
- #include <linux/of_net.h>
- #include <linux/module.h>
-
-+#define DEFAULT_GPIO_RESET_DELAY 10 /* in microseconds */
-+
- MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
- MODULE_LICENSE("GPL");
-
-@@ -220,6 +222,11 @@ int of_mdiobus_register(struct mii_bus *
-
- mdio->dev.of_node = np;
-
-+ /* Get bus level PHY reset GPIO details */
-+ mdio->reset_delay_us = DEFAULT_GPIO_RESET_DELAY;
-+ of_property_read_u32(np, "reset-delay-us", &mdio->reset_delay_us);
-+ mdio->num_reset_gpios = of_gpio_named_count(np, "reset-gpios");
-+
- /* Register the MDIO bus */
- rc = mdiobus_register(mdio);
- if (rc)
---- a/include/linux/phy.h
-+++ b/include/linux/phy.h
-@@ -193,6 +193,13 @@ struct mii_bus {
- * matching its address
- */
- int irq[PHY_MAX_ADDR];
-+
-+ /* GPIO reset pulse width in microseconds */
-+ int reset_delay_us;
-+ /* Number of reset GPIOs */
-+ int num_reset_gpios;
-+ /* Array of RESET GPIO descriptors */
-+ struct gpio_desc **reset_gpiod;
- };
- #define to_mii_bus(d) container_of(d, struct mii_bus, dev)
-