bcm53xx: backport Broadcom's iProc QSPI driver

This driver has been added instead of improving spi-bcm53xx. It has some
advantages: allows SPI speed control & hopefully doesn't have bug that
was stopping us from using multiple SPI messages for writing flash data.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 84 insertions, 0 deletions

diff --git a/target/linux/bcm53xx/patches-4.4/083-0002-spi-brcmstb-qspi-Broadcom-settop-platform-driver.patch b/target/linux/bcm53xx/patches-4.4/083-0002-spi-brcmstb-qspi-Broadcom-settop-platform-driver.patch
new file mode 100644
index 0000000000..476b11cdc8
--- /dev/null
+++ b/target/linux/bcm53xx/patches-4.4/083-0002-spi-brcmstb-qspi-Broadcom-settop-platform-driver.patch
@@ -0,0 +1,84 @@
+From 44f95d87a6187f5027568bbcdce491713d7de5e5 Mon Sep 17 00:00:00 2001
+From: Kamal Dasu <kdasu.kdev@gmail.com>
+Date: Wed, 24 Aug 2016 18:04:24 -0400
+Subject: [PATCH] spi: brcmstb-qspi: Broadcom settop platform driver
+
+Adding the settop SoC platfrom driver, this driver is compatible
+with the settop MSPI+BSPI and MSPI only blocks implemented on the
+SoCs. Driver calls the spi-bcm-qspi probe(), remove() and pm_ops.
+
+Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
+Signed-off-by: Mark Brown <broonie@kernel.org>
+---
+ drivers/spi/Makefile           |  2 +-
+ drivers/spi/spi-brcmstb-qspi.c | 53 ++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 54 insertions(+), 1 deletion(-)
+ create mode 100644 drivers/spi/spi-brcmstb-qspi.c
+
+--- a/drivers/spi/Makefile
++++ b/drivers/spi/Makefile
+@@ -19,7 +19,7 @@ obj-$(CONFIG_SPI_BCM2835AUX)		+= spi-bcm
+ obj-$(CONFIG_SPI_BCM53XX)		+= spi-bcm53xx.o
+ obj-$(CONFIG_SPI_BCM63XX)		+= spi-bcm63xx.o
+ obj-$(CONFIG_SPI_BCM63XX_HSSPI)		+= spi-bcm63xx-hsspi.o
+-obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-bcm-qspi.o
++obj-$(CONFIG_SPI_BCM_QSPI)		+= spi-brcmstb-qspi.o spi-bcm-qspi.o
+ obj-$(CONFIG_SPI_BFIN5XX)		+= spi-bfin5xx.o
+ obj-$(CONFIG_SPI_ADI_V3)                += spi-adi-v3.o
+ obj-$(CONFIG_SPI_BFIN_SPORT)		+= spi-bfin-sport.o
+--- /dev/null
++++ b/drivers/spi/spi-brcmstb-qspi.c
+@@ -0,0 +1,53 @@
++/*
++ * Copyright 2016 Broadcom
++ *
++ * 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 (the "GPL").
++ *
++ * 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 version 2 (GPLv2) for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * version 2 (GPLv2) along with this source code.
++ */
++
++#include <linux/device.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/of.h>
++#include "spi-bcm-qspi.h"
++
++static const struct of_device_id brcmstb_qspi_of_match[] = {
++	{ .compatible = "brcm,spi-brcmstb-qspi" },
++	{ .compatible = "brcm,spi-brcmstb-mspi" },
++	{},
++};
++MODULE_DEVICE_TABLE(of, brcmstb_qspi_of_match);
++
++static int brcmstb_qspi_probe(struct platform_device *pdev)
++{
++	return bcm_qspi_probe(pdev, NULL);
++}
++
++static int brcmstb_qspi_remove(struct platform_device *pdev)
++{
++	return bcm_qspi_remove(pdev);
++}
++
++static struct platform_driver brcmstb_qspi_driver = {
++	.probe			= brcmstb_qspi_probe,
++	.remove			= brcmstb_qspi_remove,
++	.driver = {
++		.name		= "brcmstb_qspi",
++		.pm		= &bcm_qspi_pm_ops,
++		.of_match_table = brcmstb_qspi_of_match,
++	}
++};
++module_platform_driver(brcmstb_qspi_driver);
++
++MODULE_LICENSE("GPL v2");
++MODULE_AUTHOR("Kamal Dasu");
++MODULE_DESCRIPTION("Broadcom SPI driver for settop SoC");