diff options
Diffstat (limited to 'target/linux/mvebu/patches-4.4/129-phy-add-I2C-mdio-bus.patch')
| -rw-r--r-- | target/linux/mvebu/patches-4.4/129-phy-add-I2C-mdio-bus.patch | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/target/linux/mvebu/patches-4.4/129-phy-add-I2C-mdio-bus.patch b/target/linux/mvebu/patches-4.4/129-phy-add-I2C-mdio-bus.patch deleted file mode 100644 index 13f8ecfcd4..0000000000 --- a/target/linux/mvebu/patches-4.4/129-phy-add-I2C-mdio-bus.patch +++ /dev/null @@ -1,163 +0,0 @@ -From 7f36ac946bfbd4090b8b94be3661b41ac73e21f4 Mon Sep 17 00:00:00 2001 -From: Russell King <rmk+kernel@arm.linux.org.uk> -Date: Fri, 25 Sep 2015 17:43:52 +0100 -Subject: [PATCH 717/744] phy: add I2C mdio bus - -Add an I2C MDIO bus bridge library, to allow phylib to access PHYs which -are connected to an I2C bus instead of the more conventional MDIO bus. -Such PHYs can be found in SFP adapters and SFF modules. - -Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> ---- - drivers/net/phy/Kconfig | 10 ++++++ - drivers/net/phy/Makefile | 1 + - drivers/net/phy/mdio-i2c.c | 90 ++++++++++++++++++++++++++++++++++++++++++++++ - drivers/net/phy/mdio-i2c.h | 19 ++++++++++ - 4 files changed, 120 insertions(+) - create mode 100644 drivers/net/phy/mdio-i2c.c - create mode 100644 drivers/net/phy/mdio-i2c.h - ---- a/drivers/net/phy/Kconfig -+++ b/drivers/net/phy/Kconfig -@@ -233,6 +233,16 @@ config MDIO_GPIO - To compile this driver as a module, choose M here: the module - will be called mdio-gpio. - -+config MDIO_I2C -+ tristate -+ depends on I2C -+ help -+ Support I2C based PHYs. This provides a MDIO bus bridged -+ to I2C to allow PHYs connected in I2C mode to be accessed -+ using the existing infrastructure. -+ -+ This is library mode. -+ - config MDIO_OCTEON - tristate "Support for MDIO buses on Octeon and ThunderX SOCs" - depends on 64BIT ---- a/drivers/net/phy/Makefile -+++ b/drivers/net/phy/Makefile -@@ -41,6 +41,7 @@ obj-$(CONFIG_SWCONFIG_B53) += b53/ - obj-$(CONFIG_FIXED_PHY) += fixed_phy.o - obj-$(CONFIG_MDIO_BITBANG) += mdio-bitbang.o - obj-$(CONFIG_MDIO_GPIO) += mdio-gpio.o -+obj-$(CONFIG_MDIO_I2C) += mdio-i2c.o - obj-$(CONFIG_NATIONAL_PHY) += national.o - obj-$(CONFIG_DP83640_PHY) += dp83640.o - obj-$(CONFIG_DP83848_PHY) += dp83848.o ---- /dev/null -+++ b/drivers/net/phy/mdio-i2c.c -@@ -0,0 +1,90 @@ -+/* -+ * MDIO I2C bridge -+ * -+ * Copyright (C) 2015 Russell King -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+#include <linux/i2c.h> -+#include <linux/phy.h> -+ -+#include "mdio-i2c.h" -+ -+static int i2c_mii_read(struct mii_bus *bus, int phy_id, int reg) -+{ -+ struct i2c_adapter *i2c = bus->priv; -+ struct i2c_msg msgs[2]; -+ u8 data[2], dev_addr = reg; -+ int bus_addr, ret; -+ -+ bus_addr = 0x40 + phy_id; -+ if (bus_addr == 0x50 || bus_addr == 0x51) -+ return 0xffff; -+ -+ msgs[0].addr = bus_addr; -+ msgs[0].flags = 0; -+ msgs[0].len = 1; -+ msgs[0].buf = &dev_addr; -+ msgs[1].addr = bus_addr; -+ msgs[1].flags = I2C_M_RD; -+ msgs[1].len = sizeof(data); -+ msgs[1].buf = data; -+ -+ ret = i2c_transfer(i2c, msgs, ARRAY_SIZE(msgs)); -+ if (ret != ARRAY_SIZE(msgs)) -+ return 0xffff; -+ -+ return data[0] << 8 | data[1]; -+} -+ -+static int i2c_mii_write(struct mii_bus *bus, int phy_id, int reg, u16 val) -+{ -+ struct i2c_adapter *i2c = bus->priv; -+ struct i2c_msg msg; -+ int bus_addr, ret; -+ u8 data[3]; -+ -+ bus_addr = 0x40 + phy_id; -+ if (bus_addr == 0x50 || bus_addr == 0x51) -+ return 0; -+ -+ data[0] = reg; -+ data[1] = val >> 8; -+ data[2] = val; -+ -+ msg.addr = bus_addr; -+ msg.flags = 0; -+ msg.len = 3; -+ msg.buf = data; -+ -+ ret = i2c_transfer(i2c, &msg, 1); -+ -+ return ret < 0 ? ret : 0; -+} -+ -+struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c) -+{ -+ struct mii_bus *mii; -+ -+ if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) -+ return ERR_PTR(-EINVAL); -+ -+ mii = mdiobus_alloc(); -+ if (!mii) -+ return ERR_PTR(-ENOMEM); -+ -+ snprintf(mii->id, MII_BUS_ID_SIZE, "i2c:%s", dev_name(parent)); -+ mii->parent = parent; -+ mii->read = i2c_mii_read; -+ mii->write = i2c_mii_write; -+ mii->priv = i2c; -+ -+ return mii; -+} -+EXPORT_SYMBOL_GPL(mdio_i2c_alloc); -+ -+MODULE_AUTHOR("Russell King"); -+MODULE_DESCRIPTION("MDIO I2C bridge library"); -+MODULE_LICENSE("GPL v2"); ---- /dev/null -+++ b/drivers/net/phy/mdio-i2c.h -@@ -0,0 +1,19 @@ -+/* -+ * MDIO I2C bridge -+ * -+ * Copyright (C) 2015 Russell King -+ * -+ * This program is free software; you can redistribute it and/or modify -+ * it under the terms of the GNU General Public License version 2 as -+ * published by the Free Software Foundation. -+ */ -+#ifndef MDIO_I2C_H -+#define MDIO_I2C_H -+ -+struct device; -+struct i2c_adapter; -+struct mii_bus; -+ -+struct mii_bus *mdio_i2c_alloc(struct device *parent, struct i2c_adapter *i2c); -+ -+#endif |