[OpenWrt-Devel] [PATCH 1/2] brcm2708: update patches to latest version
Álvaro Fernández Rojas
noltari at gmail.com
Wed Mar 9 14:32:10 EST 2016
As usual these patches were extracted from the raspberry repo:
https://github.com/raspberrypi/linux/commits/rpi-4.4.y
- Disable unused MFD RPISENSE driver.
- Disable ethernet HW checksums in order to avoid kernel exceptions.
Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
---
target/linux/brcm2708/modules.mk | 7 +-
...port-for-the-CONFIG_CMDLINE_EXTEND-option.patch | 0
...171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch | 96 ++++++++++++
...BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch | 117 ++++++++++++++
...-Pi3-DT-Add-dtparams-for-the-SD-interface.patch | 25 +++
.../0174-vchiq_arm-Tweak-the-logging-output.patch | 75 +++++++++
...bcm2835-sdhost-Only-claim-one-DMA-channel.patch | 160 +++++++++++++++++++
...76-bcm2835-mmc-Only-claim-one-DMA-channel.patch | 170 +++++++++++++++++++++
.../0177-config-rebuild-with-savedefconfig.patch | 28 ++++
.../0178-config-Add-module-for-mcp3422-ADC.patch | 30 ++++
...-Pi3-DT-Add-pull-ups-on-the-UART-RX-lines.patch | 40 +++++
.../patches-4.4/1000-mfd-rpisense-disable.patch | 10 ++
.../1001-smsc95xx-disable-hw-csum.patch | 11 ++
13 files changed, 763 insertions(+), 6 deletions(-)
mode change 100755 => 100644 target/linux/brcm2708/patches-4.4/0051-fdt-Add-support-for-the-CONFIG_CMDLINE_EXTEND-option.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0172-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0173-Pi3-DT-Add-dtparams-for-the-SD-interface.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0174-vchiq_arm-Tweak-the-logging-output.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0175-bcm2835-sdhost-Only-claim-one-DMA-channel.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0176-bcm2835-mmc-Only-claim-one-DMA-channel.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0177-config-rebuild-with-savedefconfig.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0178-config-Add-module-for-mcp3422-ADC.patch
create mode 100644 target/linux/brcm2708/patches-4.4/0179-Pi3-DT-Add-pull-ups-on-the-UART-RX-lines.patch
create mode 100644 target/linux/brcm2708/patches-4.4/1000-mfd-rpisense-disable.patch
create mode 100644 target/linux/brcm2708/patches-4.4/1001-smsc95xx-disable-hw-csum.patch
diff --git a/target/linux/brcm2708/modules.mk b/target/linux/brcm2708/modules.mk
index 2802c1d..04e6aa9 100644
--- a/target/linux/brcm2708/modules.mk
+++ b/target/linux/brcm2708/modules.mk
@@ -274,7 +274,6 @@ define KernelPackage/spi-bcm2835
SUBMENU:=$(SPI_MENU)
TITLE:=BCM2835 SPI controller driver
KCONFIG:=\
- CONFIG_BCM2708_SPIDEV=n \
CONFIG_SPI=y \
CONFIG_SPI_BCM2835 \
CONFIG_SPI_MASTER=y
@@ -293,7 +292,6 @@ define KernelPackage/spi-bcm2835-aux
SUBMENU:=$(SPI_MENU)
TITLE:=BCM2835 Aux SPI controller driver
KCONFIG:=\
- CONFIG_BCM2708_SPIDEV=n \
CONFIG_SPI=y \
CONFIG_SPI_BCM2835AUX \
CONFIG_SPI_MASTER=y
@@ -331,8 +329,7 @@ define KernelPackage/i2c-bcm2708
$(call i2c_defaults,$(I2C_BCM2708_MODULES),59)
TITLE:=Broadcom BCM2708 I2C master controller driver
KCONFIG+= \
- CONFIG_I2C_BCM2708_BAUDRATE=100000 \
- CONFIG_MFD_RPISENSE_CORE=n
+ CONFIG_I2C_BCM2708_BAUDRATE=100000
DEPENDS:=@TARGET_brcm2708 +kmod-i2c-core
endef
@@ -348,8 +345,6 @@ I2C_BCM2835_MODULES:=\
define KernelPackage/i2c-bcm2835
$(call i2c_defaults,$(I2C_BCM2835_MODULES),59)
TITLE:=Broadcom BCM2835 I2C master controller driver
- KCONFIG+= \
- CONFIG_MFD_RPISENSE_CORE=n
DEPENDS:=@TARGET_brcm2708 +kmod-i2c-core
endef
diff --git a/target/linux/brcm2708/patches-4.4/0051-fdt-Add-support-for-the-CONFIG_CMDLINE_EXTEND-option.patch b/target/linux/brcm2708/patches-4.4/0051-fdt-Add-support-for-the-CONFIG_CMDLINE_EXTEND-option.patch
old mode 100755
new mode 100644
diff --git a/target/linux/brcm2708/patches-4.4/0171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch b/target/linux/brcm2708/patches-4.4/0171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch
new file mode 100644
index 0000000..d00439e
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0171-BCM270X_DT-Add-pi3-disable-bt-overlay.patch
@@ -0,0 +1,96 @@
+From 42a9bb566fe376a1add4b3780c1b830f64500faa Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Wed, 2 Mar 2016 10:59:05 +0000
+Subject: [PATCH 171/180] BCM270X_DT: Add pi3-disable-bt overlay
+
+Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15. To disable
+the systemd service that initialises the modem so it doesn't use the UART:
+
+ sudo systemctl disable hciuart
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 8 ++++
+ .../boot/dts/overlays/pi3-disable-bt-overlay.dts | 48 ++++++++++++++++++++++
+ 3 files changed, 57 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -39,6 +39,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can0-o
+ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
++dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -496,6 +496,14 @@ Params: speed Display
+ [ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
+
+
++Name: pi3-disable-bt
++Info: Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
++ N.B. To disable the systemd service that initialises the modem so it
++ doesn't use the UART, use 'sudo systemctl disable hciuart'.
++Load: dtoverlay=pi3-disable-bt
++Params: <None>
++
++
+ Name: piscreen
+ Info: PiScreen display by OzzMaker.com
+ Load: dtoverlay=piscreen,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/pi3-disable-bt-overlay.dts
+@@ -0,0 +1,48 @@
++/dts-v1/;
++/plugin/;
++
++/* Disable Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15.
++ To disable the systemd service that initialises the modem so it doesn't use
++ the UART:
++
++ sudo systemctl disable hciuart
++*/
++
++/{
++ compatible = "brcm,bcm2708";
++
++ fragment at 0 {
++ target = <&uart1>;
++ __overlay__ {
++ status = "disabled";
++ };
++ };
++
++ fragment at 1 {
++ target = <&uart0>;
++ __overlay__ {
++ pinctrl-names = "default";
++ pinctrl-0 = <&uart0_pins>;
++ status = "okay";
++ };
++ };
++
++ fragment at 2 {
++ target = <&gpio>;
++ __overlay__ {
++ uart0_pins: uart0_pins {
++ brcm,pins = <14 15>;
++ brcm,function = <4>; /* alt0 */
++ brcm,pull = <0 2>;
++ };
++ };
++ };
++
++ fragment at 3 {
++ target-path = "/aliases";
++ __overlay__ {
++ serial0 = "/soc/uart at 7e201000";
++ serial1 = "/soc/uart at 7e215040";
++ };
++ };
++};
diff --git a/target/linux/brcm2708/patches-4.4/0172-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch b/target/linux/brcm2708/patches-4.4/0172-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch
new file mode 100644
index 0000000..3e1031c
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0172-BCM270X_DT-Add-pi3-miniuart-bt-DT-overlay.patch
@@ -0,0 +1,117 @@
+From 3b93a5e60a2272bea6b50561c6e871dde5295dfb Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Mon, 7 Mar 2016 09:53:03 +0000
+Subject: [PATCH 172/180] BCM270X_DT: Add pi3-miniuart-bt DT overlay
+
+Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
+UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
+usable baudrate.
+
+It is also necessary to edit /lib/systemd/system/hciuart.server and
+replace ttyAMA0 with ttyS0.
+
+If cmdline.txt uses the alias serial0 to refer to the user-accessable port
+then the firmware will replace with the appropriate port whether or not
+this overlay is used.
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 10 ++++
+ .../boot/dts/overlays/pi3-miniuart-bt-overlay.dts | 61 ++++++++++++++++++++++
+ 3 files changed, 72 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -40,6 +40,7 @@ dtb-$(RPI_DT_OVERLAYS) += mcp2515-can1-o
+ dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += pi3-disable-bt-overlay.dtb
++dtb-$(RPI_DT_OVERLAYS) += pi3-miniuart-bt-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -504,6 +504,16 @@ Load: dtoverlay=pi3-disable-bt
+ Params: <None>
+
+
++Name: pi3-miniuart-bt
++Info: Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
++ UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
++ usable baudrate.
++ N.B. It is also necessary to edit /lib/systemd/system/hciuart.server
++ and replace ttyAMA0 with ttyS0.
++Load: dtoverlay=pi3-miniuart-bt
++Params: <None>
++
++
+ Name: piscreen
+ Info: PiScreen display by OzzMaker.com
+ Load: dtoverlay=piscreen,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
+@@ -0,0 +1,61 @@
++/dts-v1/;
++/plugin/;
++
++/* Switch Pi3 Bluetooth function to use the mini-UART (ttyS0) and restore
++ UART0/ttyAMA0 over GPIOs 14 & 15. Note that this may reduce the maximum
++ usable baudrate.
++
++ It is also necessary to edit /lib/systemd/system/hciuart.server and
++ replace ttyAMA0 with ttyS0.
++
++ If cmdline.txt uses the alias serial0 to refer to the user-accessable port
++ then the firmware will replace with the appropriate port whether or not
++ this overlay is used.
++*/
++
++/{
++ compatible = "brcm,bcm2708";
++
++ fragment at 0 {
++ target = <&uart0>;
++ __overlay__ {
++ pinctrl-names = "default";
++ pinctrl-0 = <&uart0_pins>;
++ status = "okay";
++ };
++ };
++
++ fragment at 1 {
++ target = <&uart1>;
++ __overlay__ {
++ pinctrl-names = "default";
++ pinctrl-0 = <&uart1_pins>;
++ status = "okay";
++ };
++ };
++
++ fragment at 2 {
++ target = <&gpio>;
++ __overlay__ {
++ uart0_pins: uart0_pins {
++ brcm,pins = <14 15>;
++ brcm,function = <4>; /* alt0 */
++ brcm,pull = <0 2>;
++ };
++
++ uart1_pins: uart1_pins {
++ brcm,pins = <32 33>;
++ brcm,function = <2>; /* alt5=UART1 */
++ brcm,pull = <0 0>;
++ };
++ };
++ };
++
++ fragment at 3 {
++ target-path = "/aliases";
++ __overlay__ {
++ serial0 = "/soc/uart at 7e201000";
++ serial1 = "/soc/uart at 7e215040";
++ };
++ };
++};
diff --git a/target/linux/brcm2708/patches-4.4/0173-Pi3-DT-Add-dtparams-for-the-SD-interface.patch b/target/linux/brcm2708/patches-4.4/0173-Pi3-DT-Add-dtparams-for-the-SD-interface.patch
new file mode 100644
index 0000000..f9e4767
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0173-Pi3-DT-Add-dtparams-for-the-SD-interface.patch
@@ -0,0 +1,25 @@
+From c8b56d0359160d2aec2ab3168ef9d7c080ae9841 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Mon, 7 Mar 2016 13:38:39 +0000
+Subject: [PATCH 173/180] Pi3 DT: Add dtparams for the SD interface
+
+Add new base dtparams sd_overclock, sd_force_pio, sd_pio_limit
+and sd_debug. These were missed out of the initial Pi3 DTB.
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+@@ -188,5 +188,9 @@
+ audio = <&audio>,"status";
+ watchdog = <&watchdog>,"status";
+ random = <&random>,"status";
++ sd_overclock = <&sdhost>,"brcm,overclock-50:0";
++ sd_force_pio = <&sdhost>,"brcm,force-pio?";
++ sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
++ sd_debug = <&sdhost>,"brcm,debug";
+ };
+ };
diff --git a/target/linux/brcm2708/patches-4.4/0174-vchiq_arm-Tweak-the-logging-output.patch b/target/linux/brcm2708/patches-4.4/0174-vchiq_arm-Tweak-the-logging-output.patch
new file mode 100644
index 0000000..536c6ce
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0174-vchiq_arm-Tweak-the-logging-output.patch
@@ -0,0 +1,75 @@
+From 48f3f7707a43b019e14216cec7376eba21972f9b Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Mon, 7 Mar 2016 15:05:11 +0000
+Subject: [PATCH 174/180] vchiq_arm: Tweak the logging output
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ .../vc04_services/interface/vchiq_arm/vchiq_core.c | 31 +++++++++-------------
+ 1 file changed, 13 insertions(+), 18 deletions(-)
+
+--- a/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
++++ b/drivers/misc/vc04_services/interface/vchiq_arm/vchiq_core.c
+@@ -891,16 +891,14 @@ queue_message(VCHIQ_STATE_T *state, VCHI
+ error_count);
+ return VCHIQ_ERROR;
+ }
+- if (i == 0) {
+- if (SRVTRACE_ENABLED(service,
+- VCHIQ_LOG_INFO))
+- vchiq_log_dump_mem("Sent", 0,
+- header->data + pos,
+- min(64u,
+- elements[0].size));
+- }
+ }
+
++ if (SRVTRACE_ENABLED(service,
++ VCHIQ_LOG_INFO))
++ vchiq_log_dump_mem("Sent", 0,
++ header->data,
++ min(16, pos));
++
+ spin_lock("a_spinlock);
+ service_quota->message_use_count++;
+
+@@ -1039,16 +1037,13 @@ queue_message_sync(VCHIQ_STATE_T *state,
+ error_count);
+ return VCHIQ_ERROR;
+ }
+- if (i == 0) {
+- if (vchiq_sync_log_level >=
+- VCHIQ_LOG_TRACE)
+- vchiq_log_dump_mem("Sent Sync",
+- 0, header->data + pos,
+- min(64u,
+- elements[0].size));
+- }
+ }
+
++ if (vchiq_sync_log_level >= VCHIQ_LOG_TRACE)
++ vchiq_log_dump_mem("Sent Sync",
++ 0, header->data,
++ min(16, pos));
++
+ VCHIQ_SERVICE_STATS_INC(service, ctrl_tx_count);
+ VCHIQ_SERVICE_STATS_ADD(service, ctrl_tx_bytes, size);
+ } else {
+@@ -1720,7 +1715,7 @@ parse_rx_slots(VCHIQ_STATE_T *state)
+ remoteport, localport, size);
+ if (size > 0)
+ vchiq_log_dump_mem("Rcvd", 0, header->data,
+- min(64, size));
++ min(16, size));
+ }
+
+ if (((unsigned int)header & VCHIQ_SLOT_MASK) + calc_stride(size)
+@@ -2187,7 +2182,7 @@ sync_func(void *v)
+ remoteport, localport, size);
+ if (size > 0)
+ vchiq_log_dump_mem("Rcvd", 0, header->data,
+- min(64, size));
++ min(16, size));
+ }
+
+ switch (type) {
diff --git a/target/linux/brcm2708/patches-4.4/0175-bcm2835-sdhost-Only-claim-one-DMA-channel.patch b/target/linux/brcm2708/patches-4.4/0175-bcm2835-sdhost-Only-claim-one-DMA-channel.patch
new file mode 100644
index 0000000..fb68bcb
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0175-bcm2835-sdhost-Only-claim-one-DMA-channel.patch
@@ -0,0 +1,160 @@
+From 06c169985c0884ce67377c79d27383e23f41e2cd Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Mon, 7 Mar 2016 16:46:39 +0000
+Subject: [PATCH 175/180] bcm2835-sdhost: Only claim one DMA channel
+
+With both MMC controllers enabled there are few DMA channels left. The
+bcm2835-sdhost driver only uses DMA in one direction at a time, so it
+doesn't need to claim two channels.
+
+See: https://github.com/raspberrypi/linux/issues/1327
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ arch/arm/boot/dts/bcm2708_common.dtsi | 5 +--
+ drivers/mmc/host/bcm2835-sdhost.c | 70 ++++++++++++++++++++++++-----------
+ 2 files changed, 50 insertions(+), 25 deletions(-)
+
+--- a/arch/arm/boot/dts/bcm2708_common.dtsi
++++ b/arch/arm/boot/dts/bcm2708_common.dtsi
+@@ -136,9 +136,8 @@
+ reg = <0x7e202000 0x100>;
+ interrupts = <2 24>;
+ clocks = <&clk_core>;
+- dmas = <&dma 13>,
+- <&dma 13>;
+- dma-names = "tx", "rx";
++ dmas = <&dma 13>;
++ dma-names = "rx-tx";
+ brcm,overclock-50 = <0>;
+ brcm,pio-limit = <1>;
+ status = "disabled";
+--- a/drivers/mmc/host/bcm2835-sdhost.c
++++ b/drivers/mmc/host/bcm2835-sdhost.c
+@@ -185,9 +185,10 @@ struct bcm2835_host {
+ unsigned int debug:1; /* Enable debug output */
+
+ /*DMA part*/
+- struct dma_chan *dma_chan_rx; /* DMA channel for reads */
+- struct dma_chan *dma_chan_tx; /* DMA channel for writes */
+- struct dma_chan *dma_chan; /* Channel in used */
++ struct dma_chan *dma_chan_rxtx; /* DMA channel for reads and writes */
++ struct dma_chan *dma_chan; /* Channel in use */
++ struct dma_slave_config dma_cfg_rx;
++ struct dma_slave_config dma_cfg_tx;
+ struct dma_async_tx_descriptor *dma_desc;
+ u32 dma_dir;
+ u32 drain_words;
+@@ -771,12 +772,11 @@ static void bcm2835_sdhost_prepare_dma(s
+ log_event("PRD<", (u32)data, 0);
+ pr_debug("bcm2835_sdhost_prepare_dma()\n");
+
++ dma_chan = host->dma_chan_rxtx;
+ if (data->flags & MMC_DATA_READ) {
+- dma_chan = host->dma_chan_rx;
+ dir_data = DMA_FROM_DEVICE;
+ dir_slave = DMA_DEV_TO_MEM;
+ } else {
+- dma_chan = host->dma_chan_tx;
+ dir_data = DMA_TO_DEVICE;
+ dir_slave = DMA_MEM_TO_DEV;
+ }
+@@ -813,6 +813,12 @@ static void bcm2835_sdhost_prepare_dma(s
+ host->drain_words = len/4;
+ }
+
++ /* The parameters have already been validated, so this will not fail */
++ (void)dmaengine_slave_config(dma_chan,
++ (dir_data == DMA_FROM_DEVICE) ?
++ &host->dma_cfg_rx :
++ &host->dma_cfg_tx);
++
+ len = dma_map_sg(dma_chan->device->dev, data->sg, data->sg_len,
+ dir_data);
+
+@@ -1805,28 +1811,46 @@ int bcm2835_sdhost_add_host(struct bcm28
+ spin_lock_init(&host->lock);
+
+ if (host->allow_dma) {
+- if (IS_ERR_OR_NULL(host->dma_chan_tx) ||
+- IS_ERR_OR_NULL(host->dma_chan_rx)) {
+- pr_err("%s: unable to initialise DMA channels. "
++ if (IS_ERR_OR_NULL(host->dma_chan_rxtx)) {
++ pr_err("%s: unable to initialise DMA channel. "
+ "Falling back to PIO\n",
+ mmc_hostname(mmc));
+ host->use_dma = false;
+ } else {
+- host->use_dma = true;
+-
+ cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ cfg.slave_id = 13; /* DREQ channel */
+
++ /* Validate the slave configurations */
++
+ cfg.direction = DMA_MEM_TO_DEV;
+ cfg.src_addr = 0;
+ cfg.dst_addr = host->bus_addr + SDDATA;
+- ret = dmaengine_slave_config(host->dma_chan_tx, &cfg);
+
+- cfg.direction = DMA_DEV_TO_MEM;
+- cfg.src_addr = host->bus_addr + SDDATA;
+- cfg.dst_addr = 0;
+- ret = dmaengine_slave_config(host->dma_chan_rx, &cfg);
++ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
++
++ if (ret == 0) {
++ host->dma_cfg_tx = cfg;
++
++ cfg.direction = DMA_DEV_TO_MEM;
++ cfg.src_addr = host->bus_addr + SDDATA;
++ cfg.dst_addr = 0;
++
++ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
++ }
++
++ if (ret == 0) {
++ host->dma_cfg_rx = cfg;
++
++ host->use_dma = true;
++ } else {
++ pr_err("%s: unable to configure DMA channel. "
++ "Falling back to PIO\n",
++ mmc_hostname(mmc));
++ dma_release_channel(host->dma_chan_rxtx);
++ host->dma_chan_rxtx = NULL;
++ host->use_dma = false;
++ }
+ }
+ } else {
+ host->use_dma = false;
+@@ -1948,19 +1972,21 @@ static int bcm2835_sdhost_probe(struct p
+
+ if (host->allow_dma) {
+ if (node) {
+- host->dma_chan_tx =
+- dma_request_slave_channel(dev, "tx");
+- host->dma_chan_rx =
+- dma_request_slave_channel(dev, "rx");
++ host->dma_chan_rxtx =
++ dma_request_slave_channel(dev, "rx-tx");
++ if (!host->dma_chan_rxtx)
++ host->dma_chan_rxtx =
++ dma_request_slave_channel(dev, "tx");
++ if (!host->dma_chan_rxtx)
++ host->dma_chan_rxtx =
++ dma_request_slave_channel(dev, "rx");
+ } else {
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ /* we don't care about the channel, any would work */
+ dma_cap_set(DMA_SLAVE, mask);
+- host->dma_chan_tx =
+- dma_request_channel(mask, NULL, NULL);
+- host->dma_chan_rx =
++ host->dma_chan_rxtx =
+ dma_request_channel(mask, NULL, NULL);
+ }
+ }
diff --git a/target/linux/brcm2708/patches-4.4/0176-bcm2835-mmc-Only-claim-one-DMA-channel.patch b/target/linux/brcm2708/patches-4.4/0176-bcm2835-mmc-Only-claim-one-DMA-channel.patch
new file mode 100644
index 0000000..8f224fa
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0176-bcm2835-mmc-Only-claim-one-DMA-channel.patch
@@ -0,0 +1,170 @@
+From af80d75abc7604cd9eb1788b0171148d000db09d Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Tue, 8 Mar 2016 09:49:16 +0000
+Subject: [PATCH 176/180] bcm2835-mmc: Only claim one DMA channel
+
+With both MMC controllers enabled there are few DMA channels left. The
+bcm2835-mmc driver only uses DMA in one direction at a time, so it
+doesn't need to claim two channels.
+
+See: https://github.com/raspberrypi/linux/issues/1327
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ arch/arm/boot/dts/bcm2708_common.dtsi | 5 +--
+ drivers/mmc/host/bcm2835-mmc.c | 69 +++++++++++++++++++++++++----------
+ 2 files changed, 51 insertions(+), 23 deletions(-)
+
+--- a/arch/arm/boot/dts/bcm2708_common.dtsi
++++ b/arch/arm/boot/dts/bcm2708_common.dtsi
+@@ -232,9 +232,8 @@
+ reg = <0x7e300000 0x100>;
+ interrupts = <2 30>;
+ clocks = <&clk_mmc>;
+- dmas = <&dma 11>,
+- <&dma 11>;
+- dma-names = "tx", "rx";
++ dmas = <&dma 11>;
++ dma-names = "rx-tx";
+ brcm,overclock-50 = <0>;
+ status = "disabled";
+ };
+--- a/drivers/mmc/host/bcm2835-mmc.c
++++ b/drivers/mmc/host/bcm2835-mmc.c
+@@ -108,8 +108,9 @@ struct bcm2835_host {
+ u32 shadow;
+
+ /*DMA part*/
+- struct dma_chan *dma_chan_rx; /* DMA channel for reads */
+- struct dma_chan *dma_chan_tx; /* DMA channel for writes */
++ struct dma_chan *dma_chan_rxtx; /* DMA channel for reads and writes */
++ struct dma_slave_config dma_cfg_rx;
++ struct dma_slave_config dma_cfg_tx;
+ struct dma_async_tx_descriptor *tx_desc; /* descriptor */
+
+ bool have_dma;
+@@ -342,7 +343,7 @@ static void bcm2835_mmc_dma_complete(voi
+
+ if (host->data && !(host->data->flags & MMC_DATA_WRITE)) {
+ /* otherwise handled in SDHCI IRQ */
+- dma_chan = host->dma_chan_rx;
++ dma_chan = host->dma_chan_rxtx;
+ dir_data = DMA_FROM_DEVICE;
+
+ dma_unmap_sg(dma_chan->device->dev,
+@@ -493,16 +494,21 @@ static void bcm2835_mmc_transfer_dma(str
+ if (host->blocks == 0)
+ return;
+
++ dma_chan = host->dma_chan_rxtx;
+ if (host->data->flags & MMC_DATA_READ) {
+- dma_chan = host->dma_chan_rx;
+ dir_data = DMA_FROM_DEVICE;
+ dir_slave = DMA_DEV_TO_MEM;
+ } else {
+- dma_chan = host->dma_chan_tx;
+ dir_data = DMA_TO_DEVICE;
+ dir_slave = DMA_MEM_TO_DEV;
+ }
+
++ /* The parameters have already been validated, so this will not fail */
++ (void)dmaengine_slave_config(dma_chan,
++ (dir_data == DMA_FROM_DEVICE) ?
++ &host->dma_cfg_rx :
++ &host->dma_cfg_tx);
++
+ BUG_ON(!dma_chan->device);
+ BUG_ON(!dma_chan->device->dev);
+ BUG_ON(!host->data->sg);
+@@ -936,7 +942,7 @@ static void bcm2835_mmc_data_irq(struct
+ if (host->data->flags & MMC_DATA_WRITE) {
+ /* IRQ handled here */
+
+- dma_chan = host->dma_chan_tx;
++ dma_chan = host->dma_chan_rxtx;
+ dir_data = DMA_TO_DEVICE;
+ dma_unmap_sg(dma_chan->device->dev,
+ host->data->sg, host->data->sg_len,
+@@ -1316,28 +1322,47 @@ static int bcm2835_mmc_add_host(struct b
+ dev_info(dev, "Forcing PIO mode\n");
+ host->have_dma = false;
+ #else
+- if (IS_ERR_OR_NULL(host->dma_chan_tx) ||
+- IS_ERR_OR_NULL(host->dma_chan_rx)) {
+- dev_err(dev, "%s: Unable to initialise DMA channels. Falling back to PIO\n",
++ if (IS_ERR_OR_NULL(host->dma_chan_rxtx)) {
++ dev_err(dev, "%s: Unable to initialise DMA channel. Falling back to PIO\n",
+ DRIVER_NAME);
+ host->have_dma = false;
+ } else {
+- dev_info(dev, "DMA channels allocated");
+- host->have_dma = true;
++ dev_info(dev, "DMA channel allocated");
+
+ cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ cfg.slave_id = 11; /* DREQ channel */
+
++ /* Validate the slave configurations */
++
+ cfg.direction = DMA_MEM_TO_DEV;
+ cfg.src_addr = 0;
+ cfg.dst_addr = host->bus_addr + SDHCI_BUFFER;
+- ret = dmaengine_slave_config(host->dma_chan_tx, &cfg);
+
+- cfg.direction = DMA_DEV_TO_MEM;
+- cfg.src_addr = host->bus_addr + SDHCI_BUFFER;
+- cfg.dst_addr = 0;
+- ret = dmaengine_slave_config(host->dma_chan_rx, &cfg);
++ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
++
++ if (ret == 0) {
++ host->dma_cfg_tx = cfg;
++
++ cfg.direction = DMA_DEV_TO_MEM;
++ cfg.src_addr = host->bus_addr + SDHCI_BUFFER;
++ cfg.dst_addr = 0;
++
++ ret = dmaengine_slave_config(host->dma_chan_rxtx, &cfg);
++ }
++
++ if (ret == 0) {
++ host->dma_cfg_rx = cfg;
++
++ host->use_dma = true;
++ } else {
++ pr_err("%s: unable to configure DMA channel. "
++ "Faling back to PIO\n",
++ mmc_hostname(mmc));
++ dma_release_channel(host->dma_chan_rxtx);
++ host->dma_chan_rxtx = NULL;
++ host->use_dma = false;
++ }
+ }
+ #endif
+ mmc->max_segs = 128;
+@@ -1416,16 +1441,20 @@ static int bcm2835_mmc_probe(struct plat
+
+ #ifndef FORCE_PIO
+ if (node) {
+- host->dma_chan_tx = dma_request_slave_channel(dev, "tx");
+- host->dma_chan_rx = dma_request_slave_channel(dev, "rx");
++ host->dma_chan_rxtx = dma_request_slave_channel(dev, "rx-tx");
++ if (!host->dma_chan_rxtx)
++ host->dma_chan_rxtx =
++ dma_request_slave_channel(dev, "tx");
++ if (!host->dma_chan_rxtx)
++ host->dma_chan_rxtx =
++ dma_request_slave_channel(dev, "rx");
+ } else {
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ /* we don't care about the channel, any would work */
+ dma_cap_set(DMA_SLAVE, mask);
+- host->dma_chan_tx = dma_request_channel(mask, NULL, NULL);
+- host->dma_chan_rx = dma_request_channel(mask, NULL, NULL);
++ host->dma_chan_rxtx = dma_request_channel(mask, NULL, NULL);
+ }
+ #endif
+ clk = devm_clk_get(dev, NULL);
diff --git a/target/linux/brcm2708/patches-4.4/0177-config-rebuild-with-savedefconfig.patch b/target/linux/brcm2708/patches-4.4/0177-config-rebuild-with-savedefconfig.patch
new file mode 100644
index 0000000..34eedc1
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0177-config-rebuild-with-savedefconfig.patch
@@ -0,0 +1,28 @@
+From 0b65dbd40ad6b3d7cc979e8b7817f74b823f66ef Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix at gmail.com>
+Date: Tue, 8 Mar 2016 17:08:39 +0000
+Subject: [PATCH 177/180] config: rebuild with savedefconfig
+
+---
+ arch/arm/configs/bcm2709_defconfig | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/arch/arm/configs/bcm2709_defconfig
++++ b/arch/arm/configs/bcm2709_defconfig
+@@ -593,7 +593,6 @@ CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+ CONFIG_SERIAL_OF_PLATFORM=y
+ CONFIG_TTY_PRINTK=y
+ CONFIG_HW_RANDOM=y
+-CONFIG_HW_RANDOM_BCM2835=y
+ CONFIG_RAW_DRIVER=y
+ CONFIG_I2C=y
+ CONFIG_I2C_CHARDEV=m
+@@ -1112,7 +1111,7 @@ CONFIG_EXTCON=m
+ CONFIG_EXTCON_ARIZONA=m
+ CONFIG_IIO=m
+ CONFIG_IIO_BUFFER=y
+-CONFIG_IIO_BUFFER_CB=y
++CONFIG_IIO_BUFFER_CB=m
+ CONFIG_IIO_KFIFO_BUF=m
+ CONFIG_MCP320X=m
+ CONFIG_DHT11=m
diff --git a/target/linux/brcm2708/patches-4.4/0178-config-Add-module-for-mcp3422-ADC.patch b/target/linux/brcm2708/patches-4.4/0178-config-Add-module-for-mcp3422-ADC.patch
new file mode 100644
index 0000000..d6c1a75
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0178-config-Add-module-for-mcp3422-ADC.patch
@@ -0,0 +1,30 @@
+From 1e19acaf4b88ee6dcbe8843a07a04edf177be7c3 Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix at gmail.com>
+Date: Tue, 8 Mar 2016 17:06:33 +0000
+Subject: [PATCH 178/180] config: Add module for mcp3422 ADC
+
+---
+ arch/arm/configs/bcm2709_defconfig | 1 +
+ arch/arm/configs/bcmrpi_defconfig | 1 +
+ 2 files changed, 2 insertions(+)
+
+--- a/arch/arm/configs/bcm2709_defconfig
++++ b/arch/arm/configs/bcm2709_defconfig
+@@ -1114,6 +1114,7 @@ CONFIG_IIO_BUFFER=y
+ CONFIG_IIO_BUFFER_CB=m
+ CONFIG_IIO_KFIFO_BUF=m
+ CONFIG_MCP320X=m
++CONFIG_MCP3422=m
+ CONFIG_DHT11=m
+ CONFIG_PWM_BCM2835=m
+ CONFIG_RASPBERRYPI_FIRMWARE=y
+--- a/arch/arm/configs/bcmrpi_defconfig
++++ b/arch/arm/configs/bcmrpi_defconfig
+@@ -1121,6 +1121,7 @@ CONFIG_IIO_BUFFER=y
+ CONFIG_IIO_BUFFER_CB=m
+ CONFIG_IIO_KFIFO_BUF=m
+ CONFIG_MCP320X=m
++CONFIG_MCP3422=m
+ CONFIG_DHT11=m
+ CONFIG_PWM_BCM2835=m
+ CONFIG_RASPBERRYPI_FIRMWARE=y
diff --git a/target/linux/brcm2708/patches-4.4/0179-Pi3-DT-Add-pull-ups-on-the-UART-RX-lines.patch b/target/linux/brcm2708/patches-4.4/0179-Pi3-DT-Add-pull-ups-on-the-UART-RX-lines.patch
new file mode 100644
index 0000000..794a7bb
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0179-Pi3-DT-Add-pull-ups-on-the-UART-RX-lines.patch
@@ -0,0 +1,40 @@
+From e064caf725672cb95cc8327f4dc55d3de257cd74 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil at raspberrypi.org>
+Date: Tue, 8 Mar 2016 16:18:57 +0000
+Subject: [PATCH 179/180] Pi3 DT: Add pull-ups on the UART RX lines
+
+Signed-off-by: Phil Elwell <phil at raspberrypi.org>
+---
+ arch/arm/boot/dts/bcm2710-rpi-3-b.dts | 4 ++--
+ arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts | 2 +-
+ 2 files changed, 3 insertions(+), 3 deletions(-)
+
+--- a/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
++++ b/arch/arm/boot/dts/bcm2710-rpi-3-b.dts
+@@ -53,13 +53,13 @@
+ uart0_pins: uart0_pins {
+ brcm,pins = <32 33>;
+ brcm,function = <7>; /* alt3=UART0 */
+- brcm,pull = <0 0>;
++ brcm,pull = <0 2>;
+ };
+
+ uart1_pins: uart1_pins {
+ brcm,pins = <14 15>;
+ brcm,function = <2>; /* alt5=UART1 */
+- brcm,pull = <0 0>;
++ brcm,pull = <0 2>;
+ };
+ };
+
+--- a/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
++++ b/arch/arm/boot/dts/overlays/pi3-miniuart-bt-overlay.dts
+@@ -46,7 +46,7 @@
+ uart1_pins: uart1_pins {
+ brcm,pins = <32 33>;
+ brcm,function = <2>; /* alt5=UART1 */
+- brcm,pull = <0 0>;
++ brcm,pull = <0 2>;
+ };
+ };
+ };
diff --git a/target/linux/brcm2708/patches-4.4/1000-mfd-rpisense-disable.patch b/target/linux/brcm2708/patches-4.4/1000-mfd-rpisense-disable.patch
new file mode 100644
index 0000000..164e844
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/1000-mfd-rpisense-disable.patch
@@ -0,0 +1,10 @@
+--- a/drivers/mfd/Kconfig
++++ b/drivers/mfd/Kconfig
+@@ -13,6 +13,7 @@ config MFD_CORE
+ config MFD_RPISENSE_CORE
+ tristate "Raspberry Pi Sense HAT core functions"
+ depends on I2C
++ depends on BROKEN
+ select MFD_CORE
+ help
+ This is the core driver for the Raspberry Pi Sense HAT. This provides
diff --git a/target/linux/brcm2708/patches-4.4/1001-smsc95xx-disable-hw-csum.patch b/target/linux/brcm2708/patches-4.4/1001-smsc95xx-disable-hw-csum.patch
new file mode 100644
index 0000000..eff1f00
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/1001-smsc95xx-disable-hw-csum.patch
@@ -0,0 +1,11 @@
+--- a/drivers/net/usb/smsc95xx.c
++++ b/drivers/net/usb/smsc95xx.c
+@@ -42,7 +42,7 @@
+ #define LAN95XX_EEPROM_MAGIC (0x9500)
+ #define EEPROM_MAC_OFFSET (0x01)
+ #define DEFAULT_TX_CSUM_ENABLE (true)
+-#define DEFAULT_RX_CSUM_ENABLE (true)
++#define DEFAULT_RX_CSUM_ENABLE (false)
+ #define SMSC95XX_INTERNAL_PHY_ID (1)
+ #define SMSC95XX_TX_OVERHEAD (8)
+ #define SMSC95XX_TX_OVERHEAD_CSUM (12)
--
1.9.1
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