diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0279-BCM270X_DT-Add-sdio_overclock-parameter.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0279-BCM270X_DT-Add-sdio_overclock-parameter.patch | 38 |
1 files changed, 38 insertions, 0 deletions
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 index 0000000000..fe1a31ace1 --- /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". |