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-rw-r--r--target/linux/brcm2708/patches-4.19/950-0262-overlays-sdio-Add-enhanced-1-bit-support.patch107
1 files changed, 107 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0262-overlays-sdio-Add-enhanced-1-bit-support.patch b/target/linux/brcm2708/patches-4.19/950-0262-overlays-sdio-Add-enhanced-1-bit-support.patch
new file mode 100644
index 0000000000..42a9f112e9
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0262-overlays-sdio-Add-enhanced-1-bit-support.patch
@@ -0,0 +1,107 @@
+From 788109b357ddb30a95be72ce46dc22e2335131af Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Thu, 10 Jan 2019 15:27:56 +0000
+Subject: [PATCH] overlays: sdio: Add enhanced 1-bit support
+
+"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";
+ };
+ };