ARM: dts: am57xx: Disable voltage switching for SD card

If UHS speed modes are enabled, a compatible SD card switches down to
1.8V during enumeration. If after this a software reboot/crash takes
place and on-chip ROM tries to enumerate the SD card, the difference in
IO voltages (host @ 3.3V and card @ 1.8V) may end up damaging the card.

The fix for this is to have support for power cycling the card in
hardware (with a PORz/soft-reset line causing a power cycle of the
card). Because the beaglebone X15 (rev A,B and C), am57xx-idks and
am57xx-evms don't have this capability, disable voltage switching for
these boards.

The major effect of this is that the maximum supported speed
mode is now high speed(50 MHz) down from SDR104(200 MHz).

commit 88a748419b84 ("ARM: dts: am57xx-idk: Remove support for voltage
switching for SD card") did this only for idk boards. Do it for all
affected boards.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am571x-idk.dts b/arch/arm/boot/dts/am571x-idk.dts
index 66116ad3f9f4cf14e2d113983af63e3d91b8b58a..0a043908215c2ffaa39538cd8af6e6538acbed37 100644 (file)
--- a/arch/arm/boot/dts/am571x-idk.dts
+++ b/arch/arm/boot/dts/am571x-idk.dts
@@ -178,14 +178,9 @@
 };
 
 &mmc1 {
-       pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50", "sdr104";
+       pinctrl-names = "default", "hs";
        pinctrl-0 = <&mmc1_pins_default_no_clk_pu>;
        pinctrl-1 = <&mmc1_pins_hs>;
-       pinctrl-2 = <&mmc1_pins_sdr12>;
-       pinctrl-3 = <&mmc1_pins_sdr25>;
-       pinctrl-4 = <&mmc1_pins_sdr50>;
-       pinctrl-5 = <&mmc1_pins_ddr50_rev20 &mmc1_iodelay_ddr50_conf>;
-       pinctrl-6 = <&mmc1_pins_sdr104 &mmc1_iodelay_sdr104_rev20_conf>;
 };
 
 &mmc2 {

diff --git a/arch/arm/boot/dts/am572x-idk.dts b/arch/arm/boot/dts/am572x-idk.dts
index 4f835222c266bf907475d710d765e946101221e1..8663a9416af68cfd5b581ef2680de9f625d5bf20 100644 (file)
--- a/arch/arm/boot/dts/am572x-idk.dts
+++ b/arch/arm/boot/dts/am572x-idk.dts
@@ -19,14 +19,9 @@
 };
 
 &mmc1 {
-       pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50", "sdr104";
+       pinctrl-names = "default", "hs";
        pinctrl-0 = <&mmc1_pins_default_no_clk_pu>;
        pinctrl-1 = <&mmc1_pins_hs>;
-       pinctrl-2 = <&mmc1_pins_sdr12>;
-       pinctrl-3 = <&mmc1_pins_sdr25>;
-       pinctrl-4 = <&mmc1_pins_sdr50>;
-       pinctrl-5 = <&mmc1_pins_ddr50 &mmc1_iodelay_ddr_rev20_conf>;
-       pinctrl-6 = <&mmc1_pins_sdr104 &mmc1_iodelay_sdr104_rev20_conf>;
 };
 
 &mmc2 {

diff --git a/arch/arm/boot/dts/am574x-idk.dts b/arch/arm/boot/dts/am574x-idk.dts
index dc5141c35610e9596ee5e6fb3272bedc95e426c3..7935d70874ce2b9558a1c0410c40ff4d40633e9e 100644 (file)
--- a/arch/arm/boot/dts/am574x-idk.dts
+++ b/arch/arm/boot/dts/am574x-idk.dts
@@ -24,14 +24,9 @@
 };
 
 &mmc1 {
-       pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50", "sdr104";
+       pinctrl-names = "default", "hs";
        pinctrl-0 = <&mmc1_pins_default_no_clk_pu>;
        pinctrl-1 = <&mmc1_pins_hs>;
-       pinctrl-2 = <&mmc1_pins_default>;
-       pinctrl-3 = <&mmc1_pins_hs>;
-       pinctrl-4 = <&mmc1_pins_sdr50>;
-       pinctrl-5 = <&mmc1_pins_ddr50 &mmc1_iodelay_ddr_conf>;
-       pinctrl-6 = <&mmc1_pins_ddr50 &mmc1_iodelay_sdr104_conf>;
 };
 
 &mmc2 {

diff --git a/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi b/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
index 2341a56ebab928efe5fd3f23cdbecbe46e1082af..0cdfd2853ba87dae75af83ae545e213ad565eaaf 100644 (file)
--- a/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
+++ b/arch/arm/boot/dts/am57xx-beagle-x15-common.dtsi
@@ -433,6 +433,7 @@
 
        bus-width = <4>;
        cd-gpios = <&gpio6 27 GPIO_ACTIVE_LOW>; /* gpio 219 */
+       no-1-8-v;
 };
 
 &mmc2 {

diff --git a/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts b/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
index 5a77b334923d051f6943730b8d51849fe6161596..34c69965821bb5d20fe941d2cd5f95343f777338 100644 (file)
--- a/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15-revb1.dts
@@ -19,14 +19,9 @@
 };
 
 &mmc1 {
-       pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50", "sdr104";
+       pinctrl-names = "default", "hs";
        pinctrl-0 = <&mmc1_pins_default>;
        pinctrl-1 = <&mmc1_pins_hs>;
-       pinctrl-2 = <&mmc1_pins_sdr12>;
-       pinctrl-3 = <&mmc1_pins_sdr25>;
-       pinctrl-4 = <&mmc1_pins_sdr50>;
-       pinctrl-5 = <&mmc1_pins_ddr50 &mmc1_iodelay_ddr_rev11_conf>;
-       pinctrl-6 = <&mmc1_pins_sdr104 &mmc1_iodelay_sdr104_rev11_conf>;
        vmmc-supply = <&vdd_3v3>;
        vqmmc-supply = <&ldo1_reg>;
 };

diff --git a/arch/arm/boot/dts/am57xx-beagle-x15-revc.dts b/arch/arm/boot/dts/am57xx-beagle-x15-revc.dts
index 17c41da3b55f1c7d94460f98647f0fdb084a9dbe..ccd99160bbdfb869451f1a53001068369eb98936 100644 (file)
--- a/arch/arm/boot/dts/am57xx-beagle-x15-revc.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15-revc.dts
@@ -19,14 +19,9 @@
 };
 
 &mmc1 {
-       pinctrl-names = "default", "hs", "sdr12", "sdr25", "sdr50", "ddr50", "sdr104";
+       pinctrl-names = "default", "hs";
        pinctrl-0 = <&mmc1_pins_default>;
        pinctrl-1 = <&mmc1_pins_hs>;
-       pinctrl-2 = <&mmc1_pins_sdr12>;
-       pinctrl-3 = <&mmc1_pins_sdr25>;
-       pinctrl-4 = <&mmc1_pins_sdr50>;
-       pinctrl-5 = <&mmc1_pins_ddr50 &mmc1_iodelay_ddr_rev20_conf>;
-       pinctrl-6 = <&mmc1_pins_sdr104 &mmc1_iodelay_sdr104_rev20_conf>;
        vmmc-supply = <&vdd_3v3>;
        vqmmc-supply = <&ldo1_reg>;
 };