openwrt/target/linux/brcm2708/patches-4.14/950-0277-overlays-Add-combine-option-to-i2c-overlays.patch
Stijn Tintel f5919b65d4 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>
2018-12-18 23:19:21 +02:00

105 lines
3.7 KiB
Diff

From 1b02fe3ab446613cadcfac08d611b90becb02189 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 18 Apr 2018 17:04:23 +0100
Subject: [PATCH 277/454] overlays: Add 'combine' option to i2c overlays
The i2c0-bcm2708 and i2c1-bcm2708 overlays allow the I2C pin usage to
be changed. The names also suggest they revert to the old i2c_bcm2708
driver, but they don't. The newer i2c_bcm2835 driver forces
transactions to be combined where possible, but this breaks some
devices.
Add an option to disable transaction combining, which is currently
implemented by reverting to the old driver.
See: https://github.com/raspberrypi/firmware/issues/828
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/README | 12 ++++++++++--
arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts | 8 ++++++++
arch/arm/boot/dts/overlays/i2c1-bcm2708-overlay.dts | 9 +++++++++
3 files changed, 27 insertions(+), 2 deletions(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -865,8 +865,9 @@ Params: addr Set the
Name: i2c0-bcm2708
-Info: Enable the i2c_bcm2708 driver for the i2c0 bus. Not all pin combinations
- are usable on all platforms.
+Info: Change i2c0 pin usage. Not all pin combinations are usable on all
+ platforms - platforms other then Compute Modules can only use this
+ to disable transaction combining.
Load: dtoverlay=i2c0-bcm2708,<param>=<val>
Params: sda0_pin GPIO pin for SDA0 (deprecated - use pins_*)
scl0_pin GPIO pin for SCL0 (deprecated - use pins_*)
@@ -874,15 +875,22 @@ Params: sda0_pin GPIO pin
pins_28_29 Use pins 28 and 29
pins_44_45 Use pins 44 and 45
pins_46_47 Use pins 46 and 47
+ combine Allow transactions to be combined (default
+ "yes")
Name: i2c1-bcm2708
+Info: Change i2c1 pin usage. Not all pin combinations are usable on all
+ platforms - platforms other then Compute Modules can only use this
+ to disable transaction combining.
Info: Enable the i2c_bcm2708 driver for the i2c1 bus
Load: dtoverlay=i2c1-bcm2708,<param>=<val>
Params: sda1_pin GPIO pin for SDA1 (2 or 44 - default 2)
scl1_pin GPIO pin for SCL1 (3 or 45 - default 3)
pin_func Alternative pin function (4 (alt0), 6 (alt2) -
default 4)
+ combine Allow transactions to be combined (default
+ "yes")
Name: i2s-gpio28-31
--- a/arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c0-bcm2708-overlay.dts
@@ -50,6 +50,13 @@
};
};
+ fragment@5 {
+ target = <&i2c0>;
+ __dormant__ {
+ compatible = "brcm,bcm2708-i2c";
+ };
+ };
+
__overrides__ {
sda0_pin = <&frag1>,"brcm,pins:0";
scl0_pin = <&frag1>,"brcm,pins:4";
@@ -57,5 +64,6 @@
pins_28_29 = <0>,"-1+2-3-4";
pins_44_45 = <0>,"-1-2+3-4";
pins_46_47 = <0>,"-1-2-3+4";
+ combine = <0>, "!5";
};
};
--- a/arch/arm/boot/dts/overlays/i2c1-bcm2708-overlay.dts
+++ b/arch/arm/boot/dts/overlays/i2c1-bcm2708-overlay.dts
@@ -26,9 +26,18 @@
brcm,function = <4>; /* alt 0 */
};
};
+
+ fragment@2 {
+ target = <&i2c1>;
+ __dormant__ {
+ compatible = "brcm,bcm2708-i2c";
+ };
+ };
+
__overrides__ {
sda1_pin = <&pins>,"brcm,pins:0";
scl1_pin = <&pins>,"brcm,pins:4";
pin_func = <&pins>,"brcm,function:0";
+ combine = <0>, "!2";
};
};