2019-09-19 14:43:19 +00:00
|
|
|
From 788109b357ddb30a95be72ce46dc22e2335131af Mon Sep 17 00:00:00 2001
|
2019-07-09 18:32:28 +00:00
|
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
|
|
|
Date: Thu, 10 Jan 2019 15:27:56 +0000
|
2019-12-23 12:42:55 +00:00
|
|
|
Subject: [PATCH] overlays: sdio: Add enhanced 1-bit support
|
2019-07-09 18:32:28 +00:00
|
|
|
|
|
|
|
|
"dtoverlay=sdio,bus_width=1,gpios_22_25" is equivalent to the sdio-1bit
|
|
|
|
|
overlay, which is now deprecated.
|
|
|
|
|
|
|
|
|
|
"dtoverlay=sdio,bus_width=1,gpios_34_37" enables 1-bit mode on GPIOs 34-37.
|
|
|
|
|
|
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
|
|
|
|
|
---
|
|
|
|
|
arch/arm/boot/dts/overlays/README | 24 +++++++++++----------
|
|
|
|
|
arch/arm/boot/dts/overlays/sdio-overlay.dts | 20 ++++++++++++++++-
|
|
|
|
|
2 files changed, 32 insertions(+), 12 deletions(-)
|
|
|
|
|
|
|
|
|
|
--- a/arch/arm/boot/dts/overlays/README
|
|
|
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
|
|
|
|
@@ -479,8 +479,7 @@ Params: <None>
|
|
|
|
|
|
|
|
|
|
Name: bmp085_i2c-sensor
|
|
|
|
|
Info: This overlay is now deprecated - see i2c-sensor
|
|
|
|
|
-Load: dtoverlay=bmp085_i2c-sensor
|
|
|
|
|
-Params: <None>
|
|
|
|
|
+Load: <Deprecated>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Name: dht11
|
|
|
|
|
@@ -1737,7 +1736,8 @@ Params: overclock_50 Clock (i
|
|
|
|
|
|
|
|
|
|
Name: sdio
|
|
|
|
|
Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
|
|
|
|
|
- and enables SDIO via GPIOs 22-27.
|
|
|
|
|
+ and enables SDIO via GPIOs 22-27. An example of use in 1-bit mode is
|
|
|
|
|
+ "dtoverlay=sdio,bus_width=1,gpios_22_25"
|
|
|
|
|
Load: dtoverlay=sdio,<param>=<val>
|
|
|
|
|
Params: sdio_overclock SDIO Clock (in MHz) to use when the MMC
|
|
|
|
|
framework requests 50MHz
|
|
|
|
|
@@ -1747,16 +1747,18 @@ Params: sdio_overclock SDIO Clo
|
|
|
|
|
|
|
|
|
|
bus_width Set the SDIO host bus width (default 4 bits)
|
|
|
|
|
|
|
|
|
|
+ gpios_22_25 Select GPIOs 22-25 for 1-bit mode. Must be used
|
|
|
|
|
+ with bus_width=1. This replaces the sdio-1bit
|
|
|
|
|
+ overlay, which is now deprecated.
|
|
|
|
|
|
|
|
|
|
-Name: sdio-1bit
|
|
|
|
|
-Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
|
|
|
|
|
- and enables 1-bit SDIO via GPIOs 22-25.
|
|
|
|
|
-Load: dtoverlay=sdio-1bit,<param>=<val>
|
|
|
|
|
-Params: sdio_overclock SDIO Clock (in MHz) to use when the MMC
|
|
|
|
|
- framework requests 50MHz
|
|
|
|
|
+ gpios_34_37 Select GPIOs 34-37 for 1-bit mode. Must be used
|
|
|
|
|
+ with bus_width=1.
|
|
|
|
|
|
|
|
|
|
- poll_once Disable SDIO-device polling every second
|
|
|
|
|
- (default on: polling once at boot-time)
|
|
|
|
|
+
|
|
|
|
|
+Name: sdio-1bit
|
|
|
|
|
+Info: This overlay is now deprecated. Use
|
|
|
|
|
+ "dtoverlay=sdio,bus_width=1,gpios_22_25" instead.
|
|
|
|
|
+Load: <Deprecated>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Name: sdtweak
|
|
|
|
|
--- a/arch/arm/boot/dts/overlays/sdio-overlay.dts
|
|
|
|
|
+++ b/arch/arm/boot/dts/overlays/sdio-overlay.dts
|
|
|
|
|
@@ -32,7 +32,7 @@
|
|
|
|
|
pinctrl-names = "default";
|
|
|
|
|
pinctrl-0 = <&sdio_ovl_pins>;
|
|
|
|
|
non-removable;
|
|
|
|
|
- bus-width = <1>;
|
|
|
|
|
+ bus-width = <4>;
|
|
|
|
|
};
|
|
|
|
|
};
|
|
|
|
|
};
|
|
|
|
|
@@ -49,6 +49,22 @@
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
fragment@3 {
|
|
|
|
|
+ target = <&sdio_ovl_pins>;
|
|
|
|
|
+ __dormant__ {
|
|
|
|
|
+ brcm,pins = <22 23 24 25>;
|
|
|
|
|
+ brcm,pull = <0 2 2 2>;
|
|
|
|
|
+ };
|
|
|
|
|
+ };
|
|
|
|
|
+
|
|
|
|
|
+ fragment@4 {
|
|
|
|
|
+ target = <&sdio_ovl_pins>;
|
|
|
|
|
+ __dormant__ {
|
|
|
|
|
+ brcm,pins = <34 35 36 37>;
|
|
|
|
|
+ brcm,pull = <0 2 2 2>;
|
|
|
|
|
+ };
|
|
|
|
|
+ };
|
|
|
|
|
+
|
|
|
|
|
+ fragment@6 {
|
|
|
|
|
target-path = "/aliases";
|
|
|
|
|
__overlay__ {
|
|
|
|
|
mmc1 = "/soc/sdio@7e300000";
|
|
|
|
|
@@ -59,5 +75,7 @@
|
|
|
|
|
poll_once = <&sdio_ovl>,"non-removable?";
|
|
|
|
|
bus_width = <&sdio_ovl>,"bus-width:0";
|
|
|
|
|
sdio_overclock = <&sdio_ovl>,"brcm,overclock-50:0";
|
|
|
|
|
+ gpios_22_25 = <0>,"=3";
|
|
|
|
|
+ gpios_34_37 = <0>,"=4";
|
|
|
|
|
};
|
|
|
|
|
};
|
