mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
39 lines
1.5 KiB
Diff
39 lines
1.5 KiB
Diff
|
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".
|