ipq806x: Add support for IPQ806x chip family

Patches are generated using the "format-patch" command from the
following location:
*https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base
*rev=0771849495b4128cac2faf7d49c85c729fc48b20
Patches numbered 76/77/102/103 have already been integrated in 3.14.12,
so they're not in this list.

All these patches are either integrated are pending integration into
kernel.org, therefore these patches should go away once the kernel
gets upgraded to 3.16.

Support is currently limited to AP148 board but can be extended to other
platforms in the future.

These changes do not cover ethernet connectivity.

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>

SVN-Revision: 42334

1 files changed, 835 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches/0060-i2c-qup-New-bus-driver-for-the-Qualcomm-QUP-I2C-cont.patch b/target/linux/ipq806x/patches/0060-i2c-qup-New-bus-driver-for-the-Qualcomm-QUP-I2C-cont.patch
new file mode 100644
index 0000000000..64993a3e8c
--- /dev/null
+++ b/target/linux/ipq806x/patches/0060-i2c-qup-New-bus-driver-for-the-Qualcomm-QUP-I2C-cont.patch
@@ -0,0 +1,835 @@
+From 226eff10dc11af5d6b1bc31e5cedc079aa564fb3 Mon Sep 17 00:00:00 2001
+From: Bjorn Andersson <bjorn.andersson@sonymobile.com>
+Date: Thu, 13 Mar 2014 19:07:43 -0700
+Subject: [PATCH 060/182] i2c: qup: New bus driver for the Qualcomm QUP I2C
+ controller
+
+This bus driver supports the QUP i2c hardware controller in the Qualcomm SOCs.
+The Qualcomm Universal Peripheral Engine (QUP) is a general purpose data path
+engine with input/output FIFOs and an embedded i2c mini-core. The driver
+supports FIFO mode (for low bandwidth applications) and block mode (interrupt
+generated for each block-size data transfer).
+
+Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
+Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
+Reviewed-by: Andy Gross <agross@codeaurora.org>
+Tested-by: Philip Elcan <pelcan@codeaurora.org>
+[wsa: removed needless IS_ERR_VALUE]
+Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
+---
+ drivers/i2c/busses/Kconfig   |   10 +
+ drivers/i2c/busses/Makefile  |    1 +
+ drivers/i2c/busses/i2c-qup.c |  768 ++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 779 insertions(+)
+ create mode 100644 drivers/i2c/busses/i2c-qup.c
+
+diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
+index de17c55..1886315 100644
+--- a/drivers/i2c/busses/Kconfig
++++ b/drivers/i2c/busses/Kconfig
+@@ -648,6 +648,16 @@ config I2C_PXA_SLAVE
+ 	  is necessary for systems where the PXA may be a target on the
+ 	  I2C bus.
+ 
++config I2C_QUP
++	tristate "Qualcomm QUP based I2C controller"
++	depends on ARCH_QCOM
++	help
++	  If you say yes to this option, support will be included for the
++	  built-in I2C interface on the Qualcomm SoCs.
++
++	  This driver can also be built as a module.  If so, the module
++	  will be called i2c-qup.
++
+ config I2C_RIIC
+ 	tristate "Renesas RIIC adapter"
+ 	depends on ARCH_SHMOBILE || COMPILE_TEST
+diff --git a/drivers/i2c/busses/Makefile b/drivers/i2c/busses/Makefile
+index a08931f..bf2257b 100644
+--- a/drivers/i2c/busses/Makefile
++++ b/drivers/i2c/busses/Makefile
+@@ -63,6 +63,7 @@ obj-$(CONFIG_I2C_PNX)		+= i2c-pnx.o
+ obj-$(CONFIG_I2C_PUV3)		+= i2c-puv3.o
+ obj-$(CONFIG_I2C_PXA)		+= i2c-pxa.o
+ obj-$(CONFIG_I2C_PXA_PCI)	+= i2c-pxa-pci.o
++obj-$(CONFIG_I2C_QUP)		+= i2c-qup.o
+ obj-$(CONFIG_I2C_RIIC)		+= i2c-riic.o
+ obj-$(CONFIG_I2C_S3C2410)	+= i2c-s3c2410.o
+ obj-$(CONFIG_I2C_S6000)		+= i2c-s6000.o
+diff --git a/drivers/i2c/busses/i2c-qup.c b/drivers/i2c/busses/i2c-qup.c
+new file mode 100644
+index 0000000..c9d5f78
+--- /dev/null
++++ b/drivers/i2c/busses/i2c-qup.c
+@@ -0,0 +1,768 @@
++/*
++ * Copyright (c) 2009-2013, The Linux Foundation. All rights reserved.
++ * Copyright (c) 2014, Sony Mobile Communications AB.
++ *
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2 and
++ * only version 2 as published by the Free Software Foundation.
++ *
++ * 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 <linux/clk.h>
++#include <linux/delay.h>
++#include <linux/err.h>
++#include <linux/i2c.h>
++#include <linux/interrupt.h>
++#include <linux/io.h>
++#include <linux/module.h>
++#include <linux/of.h>
++#include <linux/platform_device.h>
++#include <linux/pm_runtime.h>
++
++/* QUP Registers */
++#define QUP_CONFIG		0x000
++#define QUP_STATE		0x004
++#define QUP_IO_MODE		0x008
++#define QUP_SW_RESET		0x00c
++#define QUP_OPERATIONAL		0x018
++#define QUP_ERROR_FLAGS		0x01c
++#define QUP_ERROR_FLAGS_EN	0x020
++#define QUP_HW_VERSION		0x030
++#define QUP_MX_OUTPUT_CNT	0x100
++#define QUP_OUT_FIFO_BASE	0x110
++#define QUP_MX_WRITE_CNT	0x150
++#define QUP_MX_INPUT_CNT	0x200
++#define QUP_MX_READ_CNT		0x208
++#define QUP_IN_FIFO_BASE	0x218
++#define QUP_I2C_CLK_CTL		0x400
++#define QUP_I2C_STATUS		0x404
++
++/* QUP States and reset values */
++#define QUP_RESET_STATE		0
++#define QUP_RUN_STATE		1
++#define QUP_PAUSE_STATE		3
++#define QUP_STATE_MASK		3
++
++#define QUP_STATE_VALID		BIT(2)
++#define QUP_I2C_MAST_GEN	BIT(4)
++
++#define QUP_OPERATIONAL_RESET	0x000ff0
++#define QUP_I2C_STATUS_RESET	0xfffffc
++
++/* QUP OPERATIONAL FLAGS */
++#define QUP_I2C_NACK_FLAG	BIT(3)
++#define QUP_OUT_NOT_EMPTY	BIT(4)
++#define QUP_IN_NOT_EMPTY	BIT(5)
++#define QUP_OUT_FULL		BIT(6)
++#define QUP_OUT_SVC_FLAG	BIT(8)
++#define QUP_IN_SVC_FLAG		BIT(9)
++#define QUP_MX_OUTPUT_DONE	BIT(10)
++#define QUP_MX_INPUT_DONE	BIT(11)
++
++/* I2C mini core related values */
++#define QUP_CLOCK_AUTO_GATE	BIT(13)
++#define I2C_MINI_CORE		(2 << 8)
++#define I2C_N_VAL		15
++/* Most significant word offset in FIFO port */
++#define QUP_MSW_SHIFT		(I2C_N_VAL + 1)
++
++/* Packing/Unpacking words in FIFOs, and IO modes */
++#define QUP_OUTPUT_BLK_MODE	(1 << 10)
++#define QUP_INPUT_BLK_MODE	(1 << 12)
++#define QUP_UNPACK_EN		BIT(14)
++#define QUP_PACK_EN		BIT(15)
++
++#define QUP_REPACK_EN		(QUP_UNPACK_EN | QUP_PACK_EN)
++
++#define QUP_OUTPUT_BLOCK_SIZE(x)(((x) >> 0) & 0x03)
++#define QUP_OUTPUT_FIFO_SIZE(x)	(((x) >> 2) & 0x07)
++#define QUP_INPUT_BLOCK_SIZE(x)	(((x) >> 5) & 0x03)
++#define QUP_INPUT_FIFO_SIZE(x)	(((x) >> 7) & 0x07)
++
++/* QUP tags */
++#define QUP_TAG_START		(1 << 8)
++#define QUP_TAG_DATA		(2 << 8)
++#define QUP_TAG_STOP		(3 << 8)
++#define QUP_TAG_REC		(4 << 8)
++
++/* Status, Error flags */
++#define I2C_STATUS_WR_BUFFER_FULL	BIT(0)
++#define I2C_STATUS_BUS_ACTIVE		BIT(8)
++#define I2C_STATUS_ERROR_MASK		0x38000fc
++#define QUP_STATUS_ERROR_FLAGS		0x7c
++
++#define QUP_READ_LIMIT			256
++
++struct qup_i2c_dev {
++	struct device		*dev;
++	void __iomem		*base;
++	int			irq;
++	struct clk		*clk;
++	struct clk		*pclk;
++	struct i2c_adapter	adap;
++
++	int			clk_ctl;
++	int			out_fifo_sz;
++	int			in_fifo_sz;
++	int			out_blk_sz;
++	int			in_blk_sz;
++
++	unsigned long		one_byte_t;
++
++	struct i2c_msg		*msg;
++	/* Current posion in user message buffer */
++	int			pos;
++	/* I2C protocol errors */
++	u32			bus_err;
++	/* QUP core errors */
++	u32			qup_err;
++
++	struct completion	xfer;
++};
++
++static irqreturn_t qup_i2c_interrupt(int irq, void *dev)
++{
++	struct qup_i2c_dev *qup = dev;
++	u32 bus_err;
++	u32 qup_err;
++	u32 opflags;
++
++	bus_err = readl(qup->base + QUP_I2C_STATUS);
++	qup_err = readl(qup->base + QUP_ERROR_FLAGS);
++	opflags = readl(qup->base + QUP_OPERATIONAL);
++
++	if (!qup->msg) {
++		/* Clear Error interrupt */
++		writel(QUP_RESET_STATE, qup->base + QUP_STATE);
++		return IRQ_HANDLED;
++	}
++
++	bus_err &= I2C_STATUS_ERROR_MASK;
++	qup_err &= QUP_STATUS_ERROR_FLAGS;
++
++	if (qup_err) {
++		/* Clear Error interrupt */
++		writel(qup_err, qup->base + QUP_ERROR_FLAGS);
++		goto done;
++	}
++
++	if (bus_err) {
++		/* Clear Error interrupt */
++		writel(QUP_RESET_STATE, qup->base + QUP_STATE);
++		goto done;
++	}
++
++	if (opflags & QUP_IN_SVC_FLAG)
++		writel(QUP_IN_SVC_FLAG, qup->base + QUP_OPERATIONAL);
++
++	if (opflags & QUP_OUT_SVC_FLAG)
++		writel(QUP_OUT_SVC_FLAG, qup->base + QUP_OPERATIONAL);
++
++done:
++	qup->qup_err = qup_err;
++	qup->bus_err = bus_err;
++	complete(&qup->xfer);
++	return IRQ_HANDLED;
++}
++
++static int qup_i2c_poll_state_mask(struct qup_i2c_dev *qup,
++				   u32 req_state, u32 req_mask)
++{
++	int retries = 1;
++	u32 state;
++
++	/*
++	 * State transition takes 3 AHB clocks cycles + 3 I2C master clock
++	 * cycles. So retry once after a 1uS delay.
++	 */
++	do {
++		state = readl(qup->base + QUP_STATE);
++
++		if (state & QUP_STATE_VALID &&
++		    (state & req_mask) == req_state)
++			return 0;
++
++		udelay(1);
++	} while (retries--);
++
++	return -ETIMEDOUT;
++}
++
++static int qup_i2c_poll_state(struct qup_i2c_dev *qup, u32 req_state)
++{
++	return qup_i2c_poll_state_mask(qup, req_state, QUP_STATE_MASK);
++}
++
++static int qup_i2c_poll_state_valid(struct qup_i2c_dev *qup)
++{
++	return qup_i2c_poll_state_mask(qup, 0, 0);
++}
++
++static int qup_i2c_poll_state_i2c_master(struct qup_i2c_dev *qup)
++{
++	return qup_i2c_poll_state_mask(qup, QUP_I2C_MAST_GEN, QUP_I2C_MAST_GEN);
++}
++
++static int qup_i2c_change_state(struct qup_i2c_dev *qup, u32 state)
++{
++	if (qup_i2c_poll_state_valid(qup) != 0)
++		return -EIO;
++
++	writel(state, qup->base + QUP_STATE);
++
++	if (qup_i2c_poll_state(qup, state) != 0)
++		return -EIO;
++	return 0;
++}
++
++static int qup_i2c_wait_writeready(struct qup_i2c_dev *qup)
++{
++	unsigned long timeout;
++	u32 opflags;
++	u32 status;
++
++	timeout = jiffies + HZ;
++
++	for (;;) {
++		opflags = readl(qup->base + QUP_OPERATIONAL);
++		status = readl(qup->base + QUP_I2C_STATUS);
++
++		if (!(opflags & QUP_OUT_NOT_EMPTY) &&
++		    !(status & I2C_STATUS_BUS_ACTIVE))
++			return 0;
++
++		if (time_after(jiffies, timeout))
++			return -ETIMEDOUT;
++
++		usleep_range(qup->one_byte_t, qup->one_byte_t * 2);
++	}
++}
++
++static void qup_i2c_set_write_mode(struct qup_i2c_dev *qup, struct i2c_msg *msg)
++{
++	/* Number of entries to shift out, including the start */
++	int total = msg->len + 1;
++
++	if (total < qup->out_fifo_sz) {
++		/* FIFO mode */
++		writel(QUP_REPACK_EN, qup->base + QUP_IO_MODE);
++		writel(total, qup->base + QUP_MX_WRITE_CNT);
++	} else {
++		/* BLOCK mode (transfer data on chunks) */
++		writel(QUP_OUTPUT_BLK_MODE | QUP_REPACK_EN,
++		       qup->base + QUP_IO_MODE);
++		writel(total, qup->base + QUP_MX_OUTPUT_CNT);
++	}
++}
++
++static void qup_i2c_issue_write(struct qup_i2c_dev *qup, struct i2c_msg *msg)
++{
++	u32 addr = msg->addr << 1;
++	u32 qup_tag;
++	u32 opflags;
++	int idx;
++	u32 val;
++
++	if (qup->pos == 0) {
++		val = QUP_TAG_START | addr;
++		idx = 1;
++	} else {
++		val = 0;
++		idx = 0;
++	}
++
++	while (qup->pos < msg->len) {
++		/* Check that there's space in the FIFO for our pair */
++		opflags = readl(qup->base + QUP_OPERATIONAL);
++		if (opflags & QUP_OUT_FULL)
++			break;
++
++		if (qup->pos == msg->len - 1)
++			qup_tag = QUP_TAG_STOP;
++		else
++			qup_tag = QUP_TAG_DATA;
++
++		if (idx & 1)
++			val |= (qup_tag | msg->buf[qup->pos]) << QUP_MSW_SHIFT;
++		else
++			val = qup_tag | msg->buf[qup->pos];
++
++		/* Write out the pair and the last odd value */
++		if (idx & 1 || qup->pos == msg->len - 1)
++			writel(val, qup->base + QUP_OUT_FIFO_BASE);
++
++		qup->pos++;
++		idx++;
++	}
++}
++
++static int qup_i2c_write_one(struct qup_i2c_dev *qup, struct i2c_msg *msg)
++{
++	unsigned long left;
++	int ret;
++
++	qup->msg = msg;
++	qup->pos = 0;
++
++	enable_irq(qup->irq);
++
++	qup_i2c_set_write_mode(qup, msg);
++
++	ret = qup_i2c_change_state(qup, QUP_RUN_STATE);
++	if (ret)
++		goto err;
++
++	writel(qup->clk_ctl, qup->base + QUP_I2C_CLK_CTL);
++
++	do {
++		ret = qup_i2c_change_state(qup, QUP_PAUSE_STATE);
++		if (ret)
++			goto err;
++
++		qup_i2c_issue_write(qup, msg);
++
++		ret = qup_i2c_change_state(qup, QUP_RUN_STATE);
++		if (ret)
++			goto err;
++
++		left = wait_for_completion_timeout(&qup->xfer, HZ);
++		if (!left) {
++			writel(1, qup->base + QUP_SW_RESET);
++			ret = -ETIMEDOUT;
++			goto err;
++		}
++
++		if (qup->bus_err || qup->qup_err) {
++			if (qup->bus_err & QUP_I2C_NACK_FLAG)
++				dev_err(qup->dev, "NACK from %x\n", msg->addr);
++			ret = -EIO;
++			goto err;
++		}
++	} while (qup->pos < msg->len);
++
++	/* Wait for the outstanding data in the fifo to drain */
++	ret = qup_i2c_wait_writeready(qup);
++
++err:
++	disable_irq(qup->irq);
++	qup->msg = NULL;
++
++	return ret;
++}
++
++static void qup_i2c_set_read_mode(struct qup_i2c_dev *qup, int len)
++{
++	if (len < qup->in_fifo_sz) {
++		/* FIFO mode */
++		writel(QUP_REPACK_EN, qup->base + QUP_IO_MODE);
++		writel(len, qup->base + QUP_MX_READ_CNT);
++	} else {
++		/* BLOCK mode (transfer data on chunks) */
++		writel(QUP_INPUT_BLK_MODE | QUP_REPACK_EN,
++		       qup->base + QUP_IO_MODE);
++		writel(len, qup->base + QUP_MX_INPUT_CNT);
++	}
++}
++
++static void qup_i2c_issue_read(struct qup_i2c_dev *qup, struct i2c_msg *msg)
++{
++	u32 addr, len, val;
++
++	addr = (msg->addr << 1) | 1;
++
++	/* 0 is used to specify a length 256 (QUP_READ_LIMIT) */
++	len = (msg->len == QUP_READ_LIMIT) ? 0 : msg->len;
++
++	val = ((QUP_TAG_REC | len) << QUP_MSW_SHIFT) | QUP_TAG_START | addr;
++	writel(val, qup->base + QUP_OUT_FIFO_BASE);
++}
++
++
++static void qup_i2c_read_fifo(struct qup_i2c_dev *qup, struct i2c_msg *msg)
++{
++	u32 opflags;
++	u32 val = 0;
++	int idx;
++
++	for (idx = 0; qup->pos < msg->len; idx++) {
++		if ((idx & 1) == 0) {
++			/* Check that FIFO have data */
++			opflags = readl(qup->base + QUP_OPERATIONAL);
++			if (!(opflags & QUP_IN_NOT_EMPTY))
++				break;
++
++			/* Reading 2 words at time */
++			val = readl(qup->base + QUP_IN_FIFO_BASE);
++
++			msg->buf[qup->pos++] = val & 0xFF;
++		} else {
++			msg->buf[qup->pos++] = val >> QUP_MSW_SHIFT;
++		}
++	}
++}
++
++static int qup_i2c_read_one(struct qup_i2c_dev *qup, struct i2c_msg *msg)
++{
++	unsigned long left;
++	int ret;
++
++	/*
++	 * The QUP block will issue a NACK and STOP on the bus when reaching
++	 * the end of the read, the length of the read is specified as one byte
++	 * which limits the possible read to 256 (QUP_READ_LIMIT) bytes.
++	 */
++	if (msg->len > QUP_READ_LIMIT) {
++		dev_err(qup->dev, "HW not capable of reads over %d bytes\n",
++			QUP_READ_LIMIT);
++		return -EINVAL;
++	}
++
++	qup->msg = msg;
++	qup->pos  = 0;
++
++	enable_irq(qup->irq);
++
++	qup_i2c_set_read_mode(qup, msg->len);
++
++	ret = qup_i2c_change_state(qup, QUP_RUN_STATE);
++	if (ret)
++		goto err;
++
++	writel(qup->clk_ctl, qup->base + QUP_I2C_CLK_CTL);
++
++	ret = qup_i2c_change_state(qup, QUP_PAUSE_STATE);
++	if (ret)
++		goto err;
++
++	qup_i2c_issue_read(qup, msg);
++
++	ret = qup_i2c_change_state(qup, QUP_RUN_STATE);
++	if (ret)
++		goto err;
++
++	do {
++		left = wait_for_completion_timeout(&qup->xfer, HZ);
++		if (!left) {
++			writel(1, qup->base + QUP_SW_RESET);
++			ret = -ETIMEDOUT;
++			goto err;
++		}
++
++		if (qup->bus_err || qup->qup_err) {
++			if (qup->bus_err & QUP_I2C_NACK_FLAG)
++				dev_err(qup->dev, "NACK from %x\n", msg->addr);
++			ret = -EIO;
++			goto err;
++		}
++
++		qup_i2c_read_fifo(qup, msg);
++	} while (qup->pos < msg->len);
++
++err:
++	disable_irq(qup->irq);
++	qup->msg = NULL;
++
++	return ret;
++}
++
++static int qup_i2c_xfer(struct i2c_adapter *adap,
++			struct i2c_msg msgs[],
++			int num)
++{
++	struct qup_i2c_dev *qup = i2c_get_adapdata(adap);
++	int ret, idx;
++
++	ret = pm_runtime_get_sync(qup->dev);
++	if (ret)
++		goto out;
++
++	writel(1, qup->base + QUP_SW_RESET);
++	ret = qup_i2c_poll_state(qup, QUP_RESET_STATE);
++	if (ret)
++		goto out;
++
++	/* Configure QUP as I2C mini core */
++	writel(I2C_MINI_CORE | I2C_N_VAL, qup->base + QUP_CONFIG);
++
++	for (idx = 0; idx < num; idx++) {
++		if (msgs[idx].len == 0) {
++			ret = -EINVAL;
++			goto out;
++		}
++
++		if (qup_i2c_poll_state_i2c_master(qup)) {
++			ret = -EIO;
++			goto out;
++		}
++
++		if (msgs[idx].flags & I2C_M_RD)
++			ret = qup_i2c_read_one(qup, &msgs[idx]);
++		else
++			ret = qup_i2c_write_one(qup, &msgs[idx]);
++
++		if (ret)
++			break;
++
++		ret = qup_i2c_change_state(qup, QUP_RESET_STATE);
++		if (ret)
++			break;
++	}
++
++	if (ret == 0)
++		ret = num;
++out:
++
++	pm_runtime_mark_last_busy(qup->dev);
++	pm_runtime_put_autosuspend(qup->dev);
++
++	return ret;
++}
++
++static u32 qup_i2c_func(struct i2c_adapter *adap)
++{
++	return I2C_FUNC_I2C | (I2C_FUNC_SMBUS_EMUL & ~I2C_FUNC_SMBUS_QUICK);
++}
++
++static const struct i2c_algorithm qup_i2c_algo = {
++	.master_xfer	= qup_i2c_xfer,
++	.functionality	= qup_i2c_func,
++};
++
++static void qup_i2c_enable_clocks(struct qup_i2c_dev *qup)
++{
++	clk_prepare_enable(qup->clk);
++	clk_prepare_enable(qup->pclk);
++}
++
++static void qup_i2c_disable_clocks(struct qup_i2c_dev *qup)
++{
++	u32 config;
++
++	qup_i2c_change_state(qup, QUP_RESET_STATE);
++	clk_disable_unprepare(qup->clk);
++	config = readl(qup->base + QUP_CONFIG);
++	config |= QUP_CLOCK_AUTO_GATE;
++	writel(config, qup->base + QUP_CONFIG);
++	clk_disable_unprepare(qup->pclk);
++}
++
++static int qup_i2c_probe(struct platform_device *pdev)
++{
++	static const int blk_sizes[] = {4, 16, 32};
++	struct device_node *node = pdev->dev.of_node;
++	struct qup_i2c_dev *qup;
++	unsigned long one_bit_t;
++	struct resource *res;
++	u32 io_mode, hw_ver, size;
++	int ret, fs_div, hs_div;
++	int src_clk_freq;
++	int clk_freq = 100000;
++
++	qup = devm_kzalloc(&pdev->dev, sizeof(*qup), GFP_KERNEL);
++	if (!qup)
++		return -ENOMEM;
++
++	qup->dev = &pdev->dev;
++	init_completion(&qup->xfer);
++	platform_set_drvdata(pdev, qup);
++
++	of_property_read_u32(node, "clock-frequency", &clk_freq);
++
++	/* We support frequencies up to FAST Mode (400KHz) */
++	if (!clk_freq || clk_freq > 400000) {
++		dev_err(qup->dev, "clock frequency not supported %d\n",
++			clk_freq);
++		return -EINVAL;
++	}
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	qup->base = devm_ioremap_resource(qup->dev, res);
++	if (IS_ERR(qup->base))
++		return PTR_ERR(qup->base);
++
++	qup->irq = platform_get_irq(pdev, 0);
++	if (qup->irq < 0) {
++		dev_err(qup->dev, "No IRQ defined\n");
++		return qup->irq;
++	}
++
++	qup->clk = devm_clk_get(qup->dev, "core");
++	if (IS_ERR(qup->clk)) {
++		dev_err(qup->dev, "Could not get core clock\n");
++		return PTR_ERR(qup->clk);
++	}
++
++	qup->pclk = devm_clk_get(qup->dev, "iface");
++	if (IS_ERR(qup->pclk)) {
++		dev_err(qup->dev, "Could not get iface clock\n");
++		return PTR_ERR(qup->pclk);
++	}
++
++	qup_i2c_enable_clocks(qup);
++
++	/*
++	 * Bootloaders might leave a pending interrupt on certain QUP's,
++	 * so we reset the core before registering for interrupts.
++	 */
++	writel(1, qup->base + QUP_SW_RESET);
++	ret = qup_i2c_poll_state_valid(qup);
++	if (ret)
++		goto fail;
++
++	ret = devm_request_irq(qup->dev, qup->irq, qup_i2c_interrupt,
++			       IRQF_TRIGGER_HIGH, "i2c_qup", qup);
++	if (ret) {
++		dev_err(qup->dev, "Request %d IRQ failed\n", qup->irq);
++		goto fail;
++	}
++	disable_irq(qup->irq);
++
++	hw_ver = readl(qup->base + QUP_HW_VERSION);
++	dev_dbg(qup->dev, "Revision %x\n", hw_ver);
++
++	io_mode = readl(qup->base + QUP_IO_MODE);
++
++	/*
++	 * The block/fifo size w.r.t. 'actual data' is 1/2 due to 'tag'
++	 * associated with each byte written/received
++	 */
++	size = QUP_OUTPUT_BLOCK_SIZE(io_mode);
++	if (size > ARRAY_SIZE(blk_sizes))
++		return -EIO;
++	qup->out_blk_sz = blk_sizes[size] / 2;
++
++	size = QUP_INPUT_BLOCK_SIZE(io_mode);
++	if (size > ARRAY_SIZE(blk_sizes))
++		return -EIO;
++	qup->in_blk_sz = blk_sizes[size] / 2;
++
++	size = QUP_OUTPUT_FIFO_SIZE(io_mode);
++	qup->out_fifo_sz = qup->out_blk_sz * (2 << size);
++
++	size = QUP_INPUT_FIFO_SIZE(io_mode);
++	qup->in_fifo_sz = qup->in_blk_sz * (2 << size);
++
++	src_clk_freq = clk_get_rate(qup->clk);
++	fs_div = ((src_clk_freq / clk_freq) / 2) - 3;
++	hs_div = 3;
++	qup->clk_ctl = (hs_div << 8) | (fs_div & 0xff);
++
++	/*
++	 * Time it takes for a byte to be clocked out on the bus.
++	 * Each byte takes 9 clock cycles (8 bits + 1 ack).
++	 */
++	one_bit_t = (USEC_PER_SEC / clk_freq) + 1;
++	qup->one_byte_t = one_bit_t * 9;
++
++	dev_dbg(qup->dev, "IN:block:%d, fifo:%d, OUT:block:%d, fifo:%d\n",
++		qup->in_blk_sz, qup->in_fifo_sz,
++		qup->out_blk_sz, qup->out_fifo_sz);
++
++	i2c_set_adapdata(&qup->adap, qup);
++	qup->adap.algo = &qup_i2c_algo;
++	qup->adap.dev.parent = qup->dev;
++	qup->adap.dev.of_node = pdev->dev.of_node;
++	strlcpy(qup->adap.name, "QUP I2C adapter", sizeof(qup->adap.name));
++
++	ret = i2c_add_adapter(&qup->adap);
++	if (ret)
++		goto fail;
++
++	pm_runtime_set_autosuspend_delay(qup->dev, MSEC_PER_SEC);
++	pm_runtime_use_autosuspend(qup->dev);
++	pm_runtime_set_active(qup->dev);
++	pm_runtime_enable(qup->dev);
++	return 0;
++
++fail:
++	qup_i2c_disable_clocks(qup);
++	return ret;
++}
++
++static int qup_i2c_remove(struct platform_device *pdev)
++{
++	struct qup_i2c_dev *qup = platform_get_drvdata(pdev);
++
++	disable_irq(qup->irq);
++	qup_i2c_disable_clocks(qup);
++	i2c_del_adapter(&qup->adap);
++	pm_runtime_disable(qup->dev);
++	pm_runtime_set_suspended(qup->dev);
++	return 0;
++}
++
++#ifdef CONFIG_PM
++static int qup_i2c_pm_suspend_runtime(struct device *device)
++{
++	struct qup_i2c_dev *qup = dev_get_drvdata(device);
++
++	dev_dbg(device, "pm_runtime: suspending...\n");
++	qup_i2c_disable_clocks(qup);
++	return 0;
++}
++
++static int qup_i2c_pm_resume_runtime(struct device *device)
++{
++	struct qup_i2c_dev *qup = dev_get_drvdata(device);
++
++	dev_dbg(device, "pm_runtime: resuming...\n");
++	qup_i2c_enable_clocks(qup);
++	return 0;
++}
++#endif
++
++#ifdef CONFIG_PM_SLEEP
++static int qup_i2c_suspend(struct device *device)
++{
++	qup_i2c_pm_suspend_runtime(device);
++	return 0;
++}
++
++static int qup_i2c_resume(struct device *device)
++{
++	qup_i2c_pm_resume_runtime(device);
++	pm_runtime_mark_last_busy(device);
++	pm_request_autosuspend(device);
++	return 0;
++}
++#endif
++
++static const struct dev_pm_ops qup_i2c_qup_pm_ops = {
++	SET_SYSTEM_SLEEP_PM_OPS(
++		qup_i2c_suspend,
++		qup_i2c_resume)
++	SET_RUNTIME_PM_OPS(
++		qup_i2c_pm_suspend_runtime,
++		qup_i2c_pm_resume_runtime,
++		NULL)
++};
++
++static const struct of_device_id qup_i2c_dt_match[] = {
++	{ .compatible = "qcom,i2c-qup-v1.1.1" },
++	{ .compatible = "qcom,i2c-qup-v2.1.1" },
++	{ .compatible = "qcom,i2c-qup-v2.2.1" },
++	{}
++};
++MODULE_DEVICE_TABLE(of, qup_i2c_dt_match);
++
++static struct platform_driver qup_i2c_driver = {
++	.probe  = qup_i2c_probe,
++	.remove = qup_i2c_remove,
++	.driver = {
++		.name = "i2c_qup",
++		.owner = THIS_MODULE,
++		.pm = &qup_i2c_qup_pm_ops,
++		.of_match_table = qup_i2c_dt_match,
++	},
++};
++
++module_platform_driver(qup_i2c_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_ALIAS("platform:i2c_qup");
+-- 
+1.7.10.4
+