Tool/software:
root@phyboard-lyra-am62xx-3:proc# dmesg | grep gpmc [ 0.988619] omap-gpmc 3b000000.memory-controller: GPMC revision 6.0 [ 0.995093] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000 [ 1.001760] omap-gpmc 3b000000.memory-controller: /bus@f0000/memory-controller@3b000000/sram@51000000 has malformed 'reg' property [ 1.013801] omap-gpmc 3b000000.memory-controller: failed to probe DT child 'sram': -19
gpmc0_pins_default: gpmc0-pins-default {
pinctrl-single,pins = <
AM62X_IOPAD(0x00b8, PIN_OUTPUT, 1) /* (U22) VOUT0_DATA0.GPMC0_A0 */
AM62X_IOPAD(0x00bc, PIN_OUTPUT, 1) /* (V24) VOUT0_DATA1.GPMC0_A1 */
AM62X_IOPAD(0x00e0, PIN_OUTPUT, 1) /* (V20) VOUT0_DATA10.GPMC0_A10 */
AM62X_IOPAD(0x00e4, PIN_OUTPUT, 1) /* (AA23) VOUT0_DATA11.GPMC0_A11 */
AM62X_IOPAD(0x00c0, PIN_OUTPUT, 1) /* (W25) VOUT0_DATA2.GPMC0_A2 */
AM62X_IOPAD(0x00c4, PIN_OUTPUT, 1) /* (W24) VOUT0_DATA3.GPMC0_A3 */
AM62X_IOPAD(0x00c8, PIN_OUTPUT, 1) /* (Y25) VOUT0_DATA4.GPMC0_A4 */
AM62X_IOPAD(0x00cc, PIN_OUTPUT, 1) /* (Y24) VOUT0_DATA5.GPMC0_A5 */
AM62X_IOPAD(0x00d0, PIN_OUTPUT, 1) /* (Y23) VOUT0_DATA6.GPMC0_A6 */
AM62X_IOPAD(0x00d4, PIN_OUTPUT, 1) /* (AA25) VOUT0_DATA7.GPMC0_A7 */
AM62X_IOPAD(0x00d8, PIN_OUTPUT, 1) /* (V21) VOUT0_DATA8.GPMC0_A8 */
AM62X_IOPAD(0x00dc, PIN_OUTPUT, 1) /* (W21) VOUT0_DATA9.GPMC0_A9 */
AM62X_IOPAD(0x003c, PIN_INPUT, 0) /* (M25) GPMC0_AD0 */
AM62X_IOPAD(0x0040, PIN_INPUT, 0) /* (N23) GPMC0_AD1 */
AM62X_IOPAD(0x0064, PIN_INPUT, 0) /* (T25) GPMC0_AD10 */
AM62X_IOPAD(0x0068, PIN_INPUT, 0) /* (R21) GPMC0_AD11 */
AM62X_IOPAD(0x006c, PIN_INPUT, 0) /* (T22) GPMC0_AD12 */
AM62X_IOPAD(0x0070, PIN_INPUT, 0) /* (T24) GPMC0_AD13 */
AM62X_IOPAD(0x0074, PIN_INPUT, 0) /* (U25) GPMC0_AD14 */
AM62X_IOPAD(0x0078, PIN_INPUT, 0) /* (U24) GPMC0_AD15 */
AM62X_IOPAD(0x0044, PIN_INPUT, 0) /* (N24) GPMC0_AD2 */
AM62X_IOPAD(0x0048, PIN_INPUT, 0) /* (N25) GPMC0_AD3 */
AM62X_IOPAD(0x004c, PIN_INPUT, 0) /* (P24) GPMC0_AD4 */
AM62X_IOPAD(0x0050, PIN_INPUT, 0) /* (P22) GPMC0_AD5 */
AM62X_IOPAD(0x0054, PIN_INPUT, 0) /* (P21) GPMC0_AD6 */
AM62X_IOPAD(0x0058, PIN_INPUT, 0) /* (R23) GPMC0_AD7 */
AM62X_IOPAD(0x005c, PIN_INPUT, 0) /* (R24) GPMC0_AD8 */
AM62X_IOPAD(0x0060, PIN_INPUT, 0) /* (R25) GPMC0_AD9 */
AM62X_IOPAD(0x0098, PIN_INPUT, 0) /* (U23) GPMC0_WAIT0 */
AM62X_IOPAD(0x00b0, PIN_OUTPUT, 0) /* (K22) GPMC0_CSn2 */
AM62X_IOPAD(0x0088, PIN_OUTPUT, 0) /* (L24) GPMC0_OEn_REn */
AM62X_IOPAD(0x008c, PIN_OUTPUT, 0) /* (L25) GPMC0_WEn */
>;
};
&gpmc0 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&gpmc0_pins_default>;
ranges = <2 0 0x0 0x52000000 0x40000>;
#address-cells = <2>;
#size-cells = <1>;
sram@08000000 {
compatible = "cypress,cy7c02av";
reg = <2 0 0x00080000>; /* CS2, 512KB memory */
#address-cells = <1>;
#size-cells = <1>;
gpmc,cs = <2>;
gpmc,device-width = <2>; /* 16-bit DPRAM */
gpmc,mux-add-data = <0>; /* No address/data mux */
gpmc,wait-pin = <0>; /* No wait pin required */
/* Corrected Timing Parameters for 25 ns cycle */
gpmc,cs-on-ns = <10>;
gpmc,cs-rd-off-ns = <30>;
gpmc,cs-wr-off-ns = <30>;
gpmc,adv-on-ns = <0>;
gpmc,adv-rd-off-ns = <30>;
gpmc,adv-wr-off-ns = <30>;
gpmc,we-on-ns = <10>;
gpmc,we-off-ns = <30>;
gpmc,oe-on-ns = <10>;
gpmc,oe-off-ns = <30>;
gpmc,rd-cycle-ns = <25>;
gpmc,wr-cycle-ns = <25>;
gpmc,access-ns = <20>;
gpmc,wr-access-ns = <20>;
gpmc,cycle2cycle-delay-ns = <10>;
gpmc,wr-data-mux-bus-ns = <10>;
gpmc,bus-turnaround-ns = <10>;
/* Removed unsupported burst settings */
};
};
