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From f6031fa472bf8ce9eaba902b00cd2af3d00f0fb4 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Fri, 12 Feb 2016 15:38:00 +0000
Subject: [PATCH] BCM270X_DT: Add dtparams for the SD interface
Add new base dtparams sd_overclock, sd_force_pio, sd_pio_limit
and sd_debug.
---
arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 4 ++++
arch/arm/boot/dts/bcm2708-rpi-b.dts | 4 ++++
arch/arm/boot/dts/bcm2708-rpi-cm.dts | 1 -
arch/arm/boot/dts/bcm2708-rpi-cm.dtsi | 13 +++++++++++++
arch/arm/boot/dts/bcm2708_common.dtsi | 2 ++
arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 4 ++++
arch/arm/boot/dts/overlays/README | 11 ++++++++++-
arch/arm/boot/dts/overlays/mmc-overlay.dts | 1 -
arch/arm/boot/dts/overlays/sdhost-overlay.dts | 27 +++++++++++++-------------
arch/arm/boot/dts/overlays/sdtweak-overlay.dts | 14 ++++++-------
10 files changed, 58 insertions(+), 23 deletions(-)
--- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
@@ -141,5 +141,9 @@
audio = <&audio>,"status";
watchdog = <&watchdog>,"status";
random = <&random>,"status";
+ sd_overclock = <&sdhost>,"brcm,overclock-50:0";
+ sd_force_pio = <&sdhost>,"brcm,force-pio?";
+ sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
+ sd_debug = <&sdhost>,"brcm,debug";
};
};
--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
@@ -131,5 +131,9 @@
audio = <&audio>,"status";
watchdog = <&watchdog>,"status";
random = <&random>,"status";
+ sd_overclock = <&sdhost>,"brcm,overclock-50:0";
+ sd_force_pio = <&sdhost>,"brcm,force-pio?";
+ sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
+ sd_debug = <&sdhost>,"brcm,debug";
};
};
--- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts
+++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts
@@ -97,6 +97,5 @@
i2c0_baudrate = <&i2c0>,"clock-frequency:0";
i2c1_baudrate = <&i2c1>,"clock-frequency:0";
i2c2_baudrate = <&i2c2>,"clock-frequency:0";
- core_freq = <&clk_core>,"clock-frequency:0";
};
};
--- a/arch/arm/boot/dts/bcm2708-rpi-cm.dtsi
+++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dtsi
@@ -7,6 +7,13 @@
};
};
+&gpio {
+ sdhost_pins: sdhost_pins {
+ brcm,pins = <48 49 50 51 52 53>;
+ brcm,function = <4>; /* alt0 */
+ };
+};
+
&leds {
act_led: act {
label = "led0";
@@ -29,6 +36,8 @@
/ {
__overrides__ {
+ core_freq = <&clk_core>,"clock-frequency:0";
+
act_led_gpio = <&act_led>,"gpios:4";
act_led_activelow = <&act_led>,"gpios:8";
act_led_trigger = <&act_led>,"linux,default-trigger";
@@ -36,5 +45,9 @@
audio = <&audio>,"status";
watchdog = <&watchdog>,"status";
random = <&random>,"status";
+ sd_overclock = <&sdhost>,"brcm,overclock-50:0";
+ sd_force_pio = <&sdhost>,"brcm,force-pio?";
+ sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
+ sd_debug = <&sdhost>,"brcm,debug";
};
};
--- a/arch/arm/boot/dts/bcm2708_common.dtsi
+++ b/arch/arm/boot/dts/bcm2708_common.dtsi
@@ -135,6 +135,7 @@
dmas = <&dma 13>,
<&dma 13>;
dma-names = "tx", "rx";
+ brcm,overclock-50 = <0>;
brcm,pio-limit = <1>;
status = "disabled";
};
@@ -203,6 +204,7 @@
dmas = <&dma 11>,
<&dma 11>;
dma-names = "tx", "rx";
+ brcm,overclock-50 = <0>;
status = "disabled";
};
--- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
+++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
@@ -141,5 +141,9 @@
audio = <&audio>,"status";
watchdog = <&watchdog>,"status";
random = <&random>,"status";
+ sd_overclock = <&sdhost>,"brcm,overclock-50:0";
+ sd_force_pio = <&sdhost>,"brcm,force-pio?";
+ sd_pio_limit = <&sdhost>,"brcm,pio-limit:0";
+ sd_debug = <&sdhost>,"brcm,debug";
};
};
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -112,6 +112,16 @@ Params:
random Set to "on" to enable the hardware random
number generator (default "on")
+ sd_overclock Clock (in MHz) to use when the MMC framework
+ requests 50MHz
+
+ sd_force_pio Disable DMA support for SD driver (default off)
+
+ sd_pio_limit Number of blocks above which to use DMA for
+ SD card (default 1)
+
+ sd_debug Enable debug output from SD driver (default off)
+
uart0 Set to "off" to disable uart0 (default "on")
watchdog Set to "on" to enable the hardware watchdog
@@ -443,7 +453,6 @@ Info: Selects the bcm2835-mmc SD/MMC d
Load: dtoverlay=mmc,<param>=<val>
Params: overclock_50 Clock (in MHz) to use when the MMC framework
requests 50MHz
- force_pio Disable DMA support
Name: mz61581
--- a/arch/arm/boot/dts/overlays/mmc-overlay.dts
+++ b/arch/arm/boot/dts/overlays/mmc-overlay.dts
@@ -34,6 +34,5 @@
__overrides__ {
overclock_50 = <&frag0>,"brcm,overclock-50:0";
- force_pio = <&frag0>,"brcm,force-pio?";
};
};
--- a/arch/arm/boot/dts/overlays/sdhost-overlay.dts
+++ b/arch/arm/boot/dts/overlays/sdhost-overlay.dts
@@ -1,19 +1,14 @@
/dts-v1/;
/plugin/;
+/* Provide backwards compatible aliases for the old sdhost dtparams. */
+
/{
compatible = "brcm,bcm2708";
fragment@0 {
- target = <&mmc>;
- __overlay__ {
- status = "disabled";
- };
- };
-
- fragment@1 {
target = <&sdhost>;
- frag1: __overlay__ {
+ frag0: __overlay__ {
brcm,overclock-50 = <0>;
brcm,pio-limit = <1>;
brcm,debug-flags = <0>;
@@ -21,11 +16,17 @@
};
};
+ fragment@1 {
+ target = <&mmc>;
+ __overlay__ {
+ status = "disabled";
+ };
+ };
+
__overrides__ {
- overclock_50 = <&frag1>,"brcm,overclock-50:0";
- force_pio = <&frag1>,"brcm,force-pio?";
- pio_limit = <&frag1>,"brcm,pio-limit:0";
- debug = <&frag1>,"brcm,debug?";
- debug_flags = <&frag1>,"brcm,debug-flags:0";
+ overclock_50 = <&frag0>,"brcm,overclock-50:0";
+ force_pio = <&frag0>,"brcm,force-pio?";
+ pio_limit = <&frag0>,"brcm,pio-limit:0";
+ debug = <&frag0>,"brcm,debug?";
};
};
--- a/arch/arm/boot/dts/overlays/sdtweak-overlay.dts
+++ b/arch/arm/boot/dts/overlays/sdtweak-overlay.dts
@@ -1,23 +1,23 @@
/dts-v1/;
/plugin/;
+/* Provide backwards compatible aliases for the old sdhost dtparams. */
+
/{
compatible = "brcm,bcm2708";
fragment@0 {
target = <&sdhost>;
- frag1: __overlay__ {
+ frag0: __overlay__ {
brcm,overclock-50 = <0>;
brcm,pio-limit = <1>;
- brcm,debug-flags = <0>;
};
};
__overrides__ {
- overclock_50 = <&frag1>,"brcm,overclock-50:0";
- force_pio = <&frag1>,"brcm,force-pio?";
- pio_limit = <&frag1>,"brcm,pio-limit:0";
- debug = <&frag1>,"brcm,debug?";
- debug_flags = <&frag1>,"brcm,debug-flags:0";
+ overclock_50 = <&frag0>,"brcm,overclock-50:0";
+ force_pio = <&frag0>,"brcm,force-pio?";
+ pio_limit = <&frag0>,"brcm,pio-limit:0";
+ debug = <&frag0>,"brcm,debug?";
};
};
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