| 123456789101112131415161718192021222324252627282930313233343536373839404142 |
- From f2c83096a1292894329f8c3855be4a21f31efa44 Mon Sep 17 00:00:00 2001
- From: Andrew Litt <ajlitt@splunge.net>
- Date: Mon, 11 Jan 2016 07:55:54 +0000
- Subject: [PATCH] SDIO-overlay: add bus_width parameter
- Allow setting of the SDIO bus width capability of the bcm2835-mmc
- host. This is helpful when only a 1 bit wide bus is connected
- between host and device but both host and device advertise 4 bit
- mode.
- ---
- arch/arm/boot/dts/overlays/README | 2 ++
- arch/arm/boot/dts/overlays/sdio-overlay.dts | 2 ++
- 2 files changed, 4 insertions(+)
- --- a/arch/arm/boot/dts/overlays/README
- +++ b/arch/arm/boot/dts/overlays/README
- @@ -634,6 +634,8 @@ Params: overclock_50 Clock (
- poll_once Disable SDIO-device polling every second
- (default on: polling once at boot-time)
-
- + bus_width Set the SDIO host bus width (default 4 bits)
- +
-
- Name: sdtweak
- Info: Tunes the bcm2835-sdhost SD/MMC driver
- --- a/arch/arm/boot/dts/overlays/sdio-overlay.dts
- +++ b/arch/arm/boot/dts/overlays/sdio-overlay.dts
- @@ -11,6 +11,7 @@
- pinctrl-names = "default";
- pinctrl-0 = <&sdio_pins>;
- non-removable;
- + bus-width = <4>;
- status = "okay";
- };
- };
- @@ -28,5 +29,6 @@
-
- __overrides__ {
- poll_once = <&sdio_mmc>,"non-removable?";
- + bus_width = <&sdio_mmc>,"bus-width:0";
- };
- };
|
