brcm2708: add kernel 4.14 support

Patch generation process:
- rebase rpi/rpi-4.14.y on v4.14.89 from linux-stable
- git format-patch v4.14.89

Patches skipped during rebase:
- lan78xx: Read MAC address from DT if present
- lan78xx: Enable LEDs and auto-negotiation
- Revert "softirq: Let ksoftirqd do its job"
- sc16is7xx: Fix for multi-channel stall
- lan78xx: Ignore DT MAC address if already valid
- lan78xx: Simple patch to prevent some crashes
- tcp_write_queue_purge clears all the SKBs in the write queue
- Revert "lan78xx: Simple patch to prevent some crashes"
- lan78xx: Connect phy early
- Arm: mm: ftrace: Only set text back to ro after kernel has been marked ro
- Revert "Revert "softirq: Let ksoftirqd do its job""
- ASoC: cs4265: SOC_SINGLE register value error fix
- Revert "ASoC: cs4265: SOC_SINGLE register value error fix"
- Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends"
- Revert "Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends""

Patches dropped after rebase:
- net: Add non-mainline source for rtl8192cu wlan
- net: Fix rtl8192cu build errors on other platforms
- brcm: adds support for BCM43341 wifi
- brcmfmac: Mute expected startup 'errors'
- ARM64: Fix build break for RTL8187/RTL8192CU wifi
- ARM64: Enable RTL8187/RTL8192CU wifi in build config
- This is the driver for Sony CXD2880 DVB-T2/T tuner + demodulator
- brcmfmac: add CLM download support
- brcmfmac: request_firmware_direct is quieter
- Sets the BCDC priority to constant 0
- brcmfmac: Disable ARP offloading when promiscuous
- brcmfmac: Avoid possible out-of-bounds read
- brcmfmac: Delete redundant length check
- net: rtl8192cu: Normalize indentation
- net: rtl8192cu: Fix implicit fallthrough warnings
- Revert "Sets the BCDC priority to constant 0"
- media: cxd2880: Bump to match 4.18.y version
- media: cxd2880-spi: Bump to match 4.18.y version
- Revert "mm: alloc_contig: re-allow CMA to compact FS pages"
- Revert "Revert "mm: alloc_contig: re-allow CMA to compact FS pages""
- cxd2880: CXD2880_SPI_DRV should select DVB_CXD2880 with
  MEDIA_SUBDRV_AUTOSELECT
- 950-0421-HID-hid-bigbenff-driver-for-BigBen-Interactive-PS3OF.patch
- 950-0453-Add-hid-bigbenff-to-list-of-have_special_driver-for-.patch

Make I2C built-in instead of modular as in upstream defconfig; also the
easiest way to get MFD_ARIZONA enabled, which is required by
kmod-sound-soc-rpi-cirrus.
Add missing compatible strings from
4.9/960-add-rasbperrypi-compatible.patch, using upstream names for
compute modules.
Add extra patch to enable the LEDs on lan78xx.

Compile-tested: bcm2708, bcm2709, bcm2710 (with CONFIG_ALL_KMODS=y)
Runtime-tested: bcm2708, bcm2710

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

1 files changed, 206 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.14/950-0234-firmware-raspberrypi-Add-a-get_throttled-sysfs-file.patch b/target/linux/brcm2708/patches-4.14/950-0234-firmware-raspberrypi-Add-a-get_throttled-sysfs-file.patch
new file mode 100644
index 0000000000..ad6ea4b999
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.14/950-0234-firmware-raspberrypi-Add-a-get_throttled-sysfs-file.patch
@@ -0,0 +1,206 @@
+From 83a8df1b7fff284fc3c2277c8051f53acde2e64f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
+Date: Sat, 24 Feb 2018 13:41:25 +0100
+Subject: [PATCH 234/454] firmware/raspberrypi: Add a get_throttled sysfs file
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Under-voltage due to inadequate power supplies is a recurring problem for
+new Raspberry Pi users. There are visual indications that an
+under-voltage situation is occuring like blinking power led and a
+lightning icon on the desktop (not shown when using the vc4 driver), but
+for new users it's not obvious that this signifies a critical situation.
+
+This patch provides a twofold improvement to the situation:
+
+Firstly it logs under-voltage events to the kernel log. This provides
+information also for headless installations.
+
+Secondly it provides a sysfs file to read the value. This improves on
+'vcgencmd' by providing change notification. Userspace can poll on the
+file and be notified of changes to the value.
+A script can poll the file and use dbus notification to put a windows on
+the desktop with information about the severity with a recommendation to
+change the power supply. A link to more information can also be provided.
+Only changes to the sticky bits are reported (cleared between readings).
+
+Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
+---
+ drivers/firmware/raspberrypi.c             | 108 +++++++++++++++++++++
+ include/soc/bcm2835/raspberrypi-firmware.h |   1 +
+ 2 files changed, 109 insertions(+)
+
+--- a/drivers/firmware/raspberrypi.c
++++ b/drivers/firmware/raspberrypi.c
+@@ -14,6 +14,7 @@
+ #include <linux/module.h>
+ #include <linux/of_platform.h>
+ #include <linux/platform_device.h>
++#include <linux/workqueue.h>
+ #include <soc/bcm2835/raspberrypi-firmware.h>
+ 
+ #define MBOX_MSG(chan, data28)		(((data28) & ~0xf) | ((chan) & 0xf))
+@@ -21,11 +22,14 @@
+ #define MBOX_DATA28(msg)		((msg) & ~0xf)
+ #define MBOX_CHAN_PROPERTY		8
+ 
++#define UNDERVOLTAGE_BIT		BIT(0)
++
+ struct rpi_firmware {
+ 	struct mbox_client cl;
+ 	struct mbox_chan *chan; /* The property channel. */
+ 	struct completion c;
+ 	u32 enabled;
++	struct delayed_work get_throttled_poll_work;
+ };
+ 
+ static struct platform_device *g_pdev;
+@@ -166,6 +170,101 @@ int rpi_firmware_property(struct rpi_fir
+ }
+ EXPORT_SYMBOL_GPL(rpi_firmware_property);
+ 
++static int rpi_firmware_get_throttled(struct rpi_firmware *fw, u32 *value)
++{
++	static ktime_t old_timestamp;
++	static u32 old_value;
++	u32 new_sticky, old_sticky, new_uv, old_uv;
++	ktime_t new_timestamp;
++	s64 elapsed_ms;
++	int ret;
++
++	if (!fw)
++		return -EBUSY;
++
++	/*
++	 * We can't run faster than the sticky shift (100ms) since we get
++	 * flipping in the sticky bits that are cleared.
++	 * This happens on polling, so just return the previous value.
++	 */
++	new_timestamp = ktime_get();
++	elapsed_ms = ktime_ms_delta(new_timestamp, old_timestamp);
++	if (elapsed_ms < 150) {
++		*value = old_value;
++		return 0;
++	}
++	old_timestamp = new_timestamp;
++
++	/* Clear sticky bits */
++	*value = 0xffff;
++
++	ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_THROTTLED,
++				    value, sizeof(*value));
++	if (ret)
++		return ret;
++
++	new_sticky = *value >> 16;
++	old_sticky = old_value >> 16;
++	old_value = *value;
++
++	/* Only notify about changes in the sticky bits */
++	if (new_sticky == old_sticky)
++		return 0;
++
++	new_uv = new_sticky & UNDERVOLTAGE_BIT;
++	old_uv = old_sticky & UNDERVOLTAGE_BIT;
++
++	if (new_uv != old_uv) {
++		if (new_uv)
++			pr_crit("Under-voltage detected! (0x%08x)\n", *value);
++		else
++			pr_info("Voltage normalised (0x%08x)\n", *value);
++	}
++
++	sysfs_notify(&fw->cl.dev->kobj, NULL, "get_throttled");
++
++	return 0;
++}
++
++static void get_throttled_poll(struct work_struct *work)
++{
++	struct rpi_firmware *fw = container_of(work, struct rpi_firmware,
++					       get_throttled_poll_work.work);
++	u32 dummy;
++	int ret;
++
++	ret = rpi_firmware_get_throttled(fw, &dummy);
++	if (ret)
++		pr_debug("%s: Failed to read value (%d)", __func__, ret);
++
++	schedule_delayed_work(&fw->get_throttled_poll_work, 2 * HZ);
++}
++
++static ssize_t get_throttled_show(struct device *dev,
++				  struct device_attribute *attr, char *buf)
++{
++	struct rpi_firmware *fw = dev_get_drvdata(dev);
++	u32 value;
++	int ret;
++
++	ret = rpi_firmware_get_throttled(fw, &value);
++	if (ret)
++		return ret;
++
++	return sprintf(buf, "%x\n", value);
++}
++
++static DEVICE_ATTR_RO(get_throttled);
++
++static struct attribute *rpi_firmware_dev_attrs[] = {
++	&dev_attr_get_throttled.attr,
++	NULL,
++};
++
++static const struct attribute_group rpi_firmware_dev_group = {
++	.attrs = rpi_firmware_dev_attrs,
++};
++
+ static void
+ rpi_firmware_print_firmware_revision(struct rpi_firmware *fw)
+ {
+@@ -190,6 +289,11 @@ static int rpi_firmware_probe(struct pla
+ {
+ 	struct device *dev = &pdev->dev;
+ 	struct rpi_firmware *fw;
++	int ret;
++
++	ret = devm_device_add_group(dev, &rpi_firmware_dev_group);
++	if (ret)
++		return ret;
+ 
+ 	fw = devm_kzalloc(dev, sizeof(*fw), GFP_KERNEL);
+ 	if (!fw)
+@@ -208,12 +312,15 @@ static int rpi_firmware_probe(struct pla
+ 	}
+ 
+ 	init_completion(&fw->c);
++	INIT_DELAYED_WORK(&fw->get_throttled_poll_work, get_throttled_poll);
+ 
+ 	platform_set_drvdata(pdev, fw);
+ 	g_pdev = pdev;
+ 
+ 	rpi_firmware_print_firmware_revision(fw);
+ 
++	schedule_delayed_work(&fw->get_throttled_poll_work, 0);
++
+ 	return 0;
+ }
+ 
+@@ -221,6 +328,7 @@ static int rpi_firmware_remove(struct pl
+ {
+ 	struct rpi_firmware *fw = platform_get_drvdata(pdev);
+ 
++	cancel_delayed_work_sync(&fw->get_throttled_poll_work);
+ 	mbox_free_channel(fw->chan);
+ 	g_pdev = NULL;
+ 
+--- a/include/soc/bcm2835/raspberrypi-firmware.h
++++ b/include/soc/bcm2835/raspberrypi-firmware.h
+@@ -77,6 +77,7 @@ enum rpi_firmware_property_tag {
+ 	RPI_FIRMWARE_GET_EDID_BLOCK =                         0x00030020,
+ 	RPI_FIRMWARE_GET_CUSTOMER_OTP =                       0x00030021,
+ 	RPI_FIRMWARE_GET_DOMAIN_STATE =                       0x00030030,
++	RPI_FIRMWARE_GET_THROTTLED =                          0x00030046,
+ 	RPI_FIRMWARE_SET_CLOCK_STATE =                        0x00038001,
+ 	RPI_FIRMWARE_SET_CLOCK_RATE =                         0x00038002,
+ 	RPI_FIRMWARE_SET_VOLTAGE =                            0x00038003,