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108 lines
3.4 KiB
Diff
108 lines
3.4 KiB
Diff
From 788109b357ddb30a95be72ce46dc22e2335131af Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Thu, 10 Jan 2019 15:27:56 +0000
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Subject: [PATCH 303/806] overlays: sdio: Add enhanced 1-bit support
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"dtoverlay=sdio,bus_width=1,gpios_22_25" is equivalent to the sdio-1bit
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overlay, which is now deprecated.
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"dtoverlay=sdio,bus_width=1,gpios_34_37" enables 1-bit mode on GPIOs 34-37.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/README | 24 +++++++++++----------
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arch/arm/boot/dts/overlays/sdio-overlay.dts | 20 ++++++++++++++++-
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2 files changed, 32 insertions(+), 12 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -479,8 +479,7 @@ Params: <None>
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Name: bmp085_i2c-sensor
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Info: This overlay is now deprecated - see i2c-sensor
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-Load: dtoverlay=bmp085_i2c-sensor
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-Params: <None>
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+Load: <Deprecated>
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Name: dht11
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@@ -1737,7 +1736,8 @@ Params: overclock_50 Clock (i
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Name: sdio
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Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
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- and enables SDIO via GPIOs 22-27.
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+ and enables SDIO via GPIOs 22-27. An example of use in 1-bit mode is
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+ "dtoverlay=sdio,bus_width=1,gpios_22_25"
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Load: dtoverlay=sdio,<param>=<val>
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Params: sdio_overclock SDIO Clock (in MHz) to use when the MMC
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framework requests 50MHz
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@@ -1747,16 +1747,18 @@ Params: sdio_overclock SDIO Clo
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bus_width Set the SDIO host bus width (default 4 bits)
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+ gpios_22_25 Select GPIOs 22-25 for 1-bit mode. Must be used
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+ with bus_width=1. This replaces the sdio-1bit
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+ overlay, which is now deprecated.
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-Name: sdio-1bit
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-Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
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- and enables 1-bit SDIO via GPIOs 22-25.
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-Load: dtoverlay=sdio-1bit,<param>=<val>
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-Params: sdio_overclock SDIO Clock (in MHz) to use when the MMC
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- framework requests 50MHz
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+ gpios_34_37 Select GPIOs 34-37 for 1-bit mode. Must be used
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+ with bus_width=1.
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- poll_once Disable SDIO-device polling every second
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- (default on: polling once at boot-time)
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+
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+Name: sdio-1bit
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+Info: This overlay is now deprecated. Use
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+ "dtoverlay=sdio,bus_width=1,gpios_22_25" instead.
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+Load: <Deprecated>
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Name: sdtweak
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--- a/arch/arm/boot/dts/overlays/sdio-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/sdio-overlay.dts
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@@ -32,7 +32,7 @@
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pinctrl-names = "default";
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pinctrl-0 = <&sdio_ovl_pins>;
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non-removable;
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- bus-width = <1>;
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+ bus-width = <4>;
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};
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};
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};
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@@ -49,6 +49,22 @@
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};
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fragment@3 {
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+ target = <&sdio_ovl_pins>;
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+ __dormant__ {
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+ brcm,pins = <22 23 24 25>;
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+ brcm,pull = <0 2 2 2>;
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&sdio_ovl_pins>;
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+ __dormant__ {
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+ brcm,pins = <34 35 36 37>;
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+ brcm,pull = <0 2 2 2>;
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+ };
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+ };
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+
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+ fragment@6 {
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target-path = "/aliases";
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__overlay__ {
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mmc1 = "/soc/sdio@7e300000";
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@@ -59,5 +75,7 @@
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poll_once = <&sdio_ovl>,"non-removable?";
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bus_width = <&sdio_ovl>,"bus-width:0";
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sdio_overclock = <&sdio_ovl>,"brcm,overclock-50:0";
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+ gpios_22_25 = <0>,"=3";
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+ gpios_34_37 = <0>,"=4";
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};
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};
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