brcm2708: add kernel 4.14 support

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.14 / 950-0279-BCM270X_DT-Add-sdio_overclock-parameter.patch

diff --git a/target/linux/brcm2708/patches-4.14/950-0279-BCM270X_DT-Add-sdio_overclock-parameter.patch b/target/linux/brcm2708/patches-4.14/950-0279-BCM270X_DT-Add-sdio_overclock-parameter.patch
new file mode 100644 (file)
index 0000000..fe1a31a
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.14/950-0279-BCM270X_DT-Add-sdio_overclock-parameter.patch
@@ -0,0 +1,38 @@
+From 3c015b0f686824f1b0815cc028665304ab0981d6 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 24 Apr 2018 14:28:33 +0100
+Subject: [PATCH 279/454] BCM270X_DT: Add sdio_overclock parameter
+
+The Arasan MMC interface is used on some RPis to drive the SDIO
+link to the WiFi controller. The downstream bcm2835-mmc driver,
+like the bcm2835-sdhost driver, can be over- (or under-) clocked.
+Add a common parameter - sdio_overclock - to all DTBs to control it.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/bcm2708-rpi.dtsi | 1 +
+ arch/arm/boot/dts/overlays/README  | 3 +++
+ 2 files changed, 4 insertions(+)
+
+--- a/arch/arm/boot/dts/bcm2708-rpi.dtsi
++++ b/arch/arm/boot/dts/bcm2708-rpi.dtsi
+@@ -115,6 +115,7 @@
+               sd_force_pio = <&sdhost>,"brcm,force-pio?";
+               sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
+               sd_debug     = <&sdhost>,"brcm,debug";
++              sdio_overclock = <&mmc>,"brcm,overclock-50:0";
+               axiperf      = <&axiperf>,"status";
+       };
+ };
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -139,6 +139,9 @@ Params:
+ 
+         sd_debug                Enable debug output from SD driver (default off)
+ 
++        sdio_overclock          Clock (in MHz) to use when the MMC framework
++                                requests 50MHz for the SDIO/WiFi interface.
++
+         tx_lpi_timer            Set the delay in microseconds between going idle
+                                 and entering the low power state (default 600).
+                                 Requires EEE to be enabled - see "eee".