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6618e47895
It seems that ever since (536f6b9mmc: dw_mmc: Reset DMA before enabling IDMAC) landed upstream that SD cards have been very unhappy on rk3288-evb. They were a little unhappy before that change, but after that change they're REALLY unhappy. It turns out that the above fix happens to fix a corruption when reading card information during probe time. Without the fix we didn't detect that high speed SD cards could actually support high speed. With the fix we suddenly detect that they're high speed and we try to use them at 50MHz. That doesn't work so well on EVB with the default drive strength (maybe because there are two physical SD card slots hooked up to the same pin?). Fix the problem by bumping up the drive strength of the sdmmc lines. Signed-off-by: Doug Anderson <dianders@chromium.org> Fixes:536f6b91d2("mmc: dw_mmc: Reset DMA before enabling IDMAC") Signed-off-by: Heiko Stuebner <heiko@sntech.de>
220 lines
4.6 KiB
Plaintext
220 lines
4.6 KiB
Plaintext
/*
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <dt-bindings/pwm/pwm.h>
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#include "rk3288.dtsi"
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/ {
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memory {
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reg = <0x0 0x80000000>;
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};
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backlight {
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compatible = "pwm-backlight";
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brightness-levels = <
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0 1 2 3 4 5 6 7
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8 9 10 11 12 13 14 15
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16 17 18 19 20 21 22 23
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24 25 26 27 28 29 30 31
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32 33 34 35 36 37 38 39
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40 41 42 43 44 45 46 47
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48 49 50 51 52 53 54 55
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56 57 58 59 60 61 62 63
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64 65 66 67 68 69 70 71
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72 73 74 75 76 77 78 79
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80 81 82 83 84 85 86 87
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88 89 90 91 92 93 94 95
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96 97 98 99 100 101 102 103
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104 105 106 107 108 109 110 111
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112 113 114 115 116 117 118 119
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120 121 122 123 124 125 126 127
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128 129 130 131 132 133 134 135
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136 137 138 139 140 141 142 143
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144 145 146 147 148 149 150 151
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152 153 154 155 156 157 158 159
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160 161 162 163 164 165 166 167
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168 169 170 171 172 173 174 175
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176 177 178 179 180 181 182 183
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184 185 186 187 188 189 190 191
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192 193 194 195 196 197 198 199
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200 201 202 203 204 205 206 207
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208 209 210 211 212 213 214 215
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216 217 218 219 220 221 222 223
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224 225 226 227 228 229 230 231
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232 233 234 235 236 237 238 239
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240 241 242 243 244 245 246 247
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248 249 250 251 252 253 254 255>;
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default-brightness-level = <128>;
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enable-gpios = <&gpio7 2 GPIO_ACTIVE_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&bl_en>;
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pwms = <&pwm0 0 1000000 PWM_POLARITY_INVERTED>;
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};
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gpio-keys {
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compatible = "gpio-keys";
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#address-cells = <1>;
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#size-cells = <0>;
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autorepeat;
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pinctrl-names = "default";
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pinctrl-0 = <&pwrbtn>;
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button@0 {
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gpios = <&gpio0 5 GPIO_ACTIVE_LOW>;
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linux,code = <116>;
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label = "GPIO Key Power";
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linux,input-type = <1>;
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gpio-key,wakeup = <1>;
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debounce-interval = <100>;
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};
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};
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/* This turns on USB vbus for both host0 (ehci) and host1 (dwc2) */
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vcc_host: vcc-host-regulator {
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compatible = "regulator-fixed";
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enable-active-high;
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gpio = <&gpio0 14 GPIO_ACTIVE_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&host_vbus_drv>;
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regulator-name = "vcc_host";
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regulator-always-on;
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regulator-boot-on;
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};
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};
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&emmc {
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broken-cd;
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bus-width = <8>;
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cap-mmc-highspeed;
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disable-wp;
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non-removable;
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num-slots = <1>;
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pinctrl-names = "default";
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pinctrl-0 = <&emmc_clk &emmc_cmd &emmc_pwr &emmc_bus8>;
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status = "okay";
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};
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&sdmmc {
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bus-width = <4>;
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cap-mmc-highspeed;
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cap-sd-highspeed;
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card-detect-delay = <200>;
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disable-wp; /* wp not hooked up */
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num-slots = <1>;
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pinctrl-names = "default";
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pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_cd &sdmmc_bus4>;
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status = "okay";
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};
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&i2c0 {
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status = "okay";
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};
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&wdt {
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status = "okay";
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};
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&pwm0 {
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status = "okay";
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};
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&uart0 {
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status = "okay";
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};
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&uart1 {
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status = "okay";
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};
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&uart2 {
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status = "okay";
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};
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&uart3 {
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status = "okay";
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};
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&uart4 {
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status = "okay";
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};
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&tsadc {
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rockchip,hw-tshut-mode = <0>; /* tshut mode 0:CRU 1:GPIO */
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rockchip,hw-tshut-polarity = <0>; /* tshut polarity 0:LOW 1:HIGH */
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status = "okay";
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};
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&pinctrl {
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pcfg_pull_none_drv_8ma: pcfg-pull-none-drv-8ma {
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drive-strength = <8>;
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};
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pcfg_pull_up_drv_8ma: pcfg-pull-up-drv-8ma {
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bias-pull-up;
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drive-strength = <8>;
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};
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backlight {
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bl_en: bl-en {
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rockchip,pins = <7 2 RK_FUNC_GPIO &pcfg_pull_none>;
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};
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};
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buttons {
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pwrbtn: pwrbtn {
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rockchip,pins = <0 5 RK_FUNC_GPIO &pcfg_pull_up>;
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};
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};
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pmic {
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pmic_int: pmic-int {
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rockchip,pins = <RK_GPIO0 4 RK_FUNC_GPIO &pcfg_pull_up>;
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};
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};
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sdmmc {
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/*
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* Default drive strength isn't enough to achieve even
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* high-speed mode on EVB board so bump up to 8ma.
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*/
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sdmmc_bus4: sdmmc-bus4 {
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rockchip,pins = <6 16 RK_FUNC_1 &pcfg_pull_up_drv_8ma>,
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<6 17 RK_FUNC_1 &pcfg_pull_up_drv_8ma>,
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<6 18 RK_FUNC_1 &pcfg_pull_up_drv_8ma>,
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<6 19 RK_FUNC_1 &pcfg_pull_up_drv_8ma>;
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};
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sdmmc_clk: sdmmc-clk {
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rockchip,pins = <6 20 RK_FUNC_1 &pcfg_pull_none_drv_8ma>;
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};
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sdmmc_cmd: sdmmc-cmd {
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rockchip,pins = <6 21 RK_FUNC_1 &pcfg_pull_up_drv_8ma>;
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};
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};
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usb {
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host_vbus_drv: host-vbus-drv {
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rockchip,pins = <0 14 RK_FUNC_GPIO &pcfg_pull_none>;
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};
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};
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};
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&usb_host0_ehci {
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status = "okay";
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};
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&usb_host1 {
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status = "okay";
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};
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