f696ba6b12
[ Upstream commit fb59ee37cfe20d10d19568899d1458a58361246c ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
40 lines
1.0 KiB
Plaintext
40 lines
1.0 KiB
Plaintext
/*
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* Copyright (C) 2014-2016 Texas Instruments Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "am57xx-beagle-x15-common.dtsi"
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/ {
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model = "TI AM5728 BeagleBoard-X15 rev B1";
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};
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&tpd12s015 {
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gpios = <&gpio7 10 GPIO_ACTIVE_HIGH>, /* gpio7_10, CT CP HPD */
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<&gpio2 30 GPIO_ACTIVE_HIGH>, /* gpio2_30, LS OE */
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<&gpio7 12 GPIO_ACTIVE_HIGH>; /* gpio7_12/sp1_cs2, HPD */
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};
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&mmc1 {
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pinctrl-names = "default", "hs";
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pinctrl-0 = <&mmc1_pins_default>;
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pinctrl-1 = <&mmc1_pins_hs>;
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vmmc-supply = <&vdd_3v3>;
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vqmmc-supply = <&ldo1_reg>;
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};
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&mmc2 {
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pinctrl-names = "default", "hs", "ddr_1_8v";
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pinctrl-0 = <&mmc2_pins_default>;
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pinctrl-1 = <&mmc2_pins_hs>;
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pinctrl-2 = <&mmc2_pins_ddr_3_3v_rev11 &mmc2_iodelay_ddr_3_3v_rev11_conf>;
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};
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/* errata i880 "Ethernet RGMII2 Limited to 10/100 Mbps" */
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&phy1 {
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max-speed = <100>;
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};
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