QuickJack
commented
8 years ago Still present in 4.1.17-bone-rt-r19. Here is my modified .dts file:
/*
* optargs=capemgr.disable_partno=BB-BONE-EMMC-2G
* "arch/arm/boot/dts/am335x-boneblack.dts", find the section starting
* with "&mmc2 {" and in section change status = "okay" into "disabled".
* do once : mmc dev 1
* mmc rstn 1
* in uBoot or in uEnv and then delete
*/
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
/* identification */
part-number = "BB-BONE-LOGIBONE";
version = "00A3";
/* state the resources this cape uses */
exclusive-use =
/* the pin header uses */
"P8.25", /* gpmc: gpmc_ad0 */
"P8.24", /* gpmc: gpmc_ad1 */
"P8.5", /* gpmc: gpmc_ad2 */
"P8.6", /* gpmc: gpmc_ad3 */
"P8.23", /* gpmc: gpmc_ad4 */
"P8.22", /* gpmc: gpmc_ad5 */
"P8.3", /* gpmc: gpmc_ad6 */
"P8.4", /* gpmc: gpmc_ad7 */
"P8.19", /* gpmc: gpmc_ad8 */
"P8.13", /* gpmc: gpmc_ad9 */
"P8.14", /* gpmc: gpmc_ad10 */
"P8.17", /* gpmc: gpmc_ad11 */
"P8.12", /* gpmc: gpmc_ad12 */
"P8.11", /* gpmc: gpmc_ad13 */
"P8.16", /* gpmc: gpmc_ad14 */
"P8.15", /* gpmc: gpmc_ad15 */
"P9.13", /* gpmc: gpmc_wpn */
"P8.21", /* gpmc: gpmc_csn1 */
"P8.18", /* gpmc: gpmc_clk */
"P8.7", /* gpmc: gpmc_advn_ale */
"P8.8", /* gpmc: gpmc_oen_ren */
"P8.10", /* gpmc: gpmc_wen */
"P8.9", /* gpmc: gpmc_ben0_cle */
"gpmc";
/* the reset pin */
/*"eMMC_RSTn";*/
#address-cells = <1>;
#size-cells = <1>;
fragment@0 {
target = <&am33xx_pinmux>;
__overlay__ {
gpmc_pins: pinmux_gpmc_pins {
pinctrl-single,pins = <
0x000 0x30 /* gpmc_ad0.gpmc_ad0 MODE0 | INPUT | PULLUP */
0x004 0x30 /* gpmc_ad1.gpmc_ad1 MODE0 | INPUT | PULLUP */
0x008 0x30 /* gpmc_ad2.gpmc_ad2 MODE0 | INPUT | PULLUP */
0x00C 0x30 /* gpmc_ad3.gpmc_ad3 MODE0 | INPUT | PULLUP */
0x010 0x30 /* gpmc_ad4.gpmc_ad4 MODE0 | INPUT | PULLUP */
0x014 0x30 /* gpmc_ad5.gpmc_ad5 MODE0 | INPUT | PULLUP */
0x018 0x30 /* gpmc_ad6.gpmc_ad6 MODE0 | INPUT | PULLUP */
0x01C 0x30 /* gpmc_ad7.gpmc_ad7 MODE0 | INPUT | PULLUP */
0x020 0x30 /* gpmc_ad8.gpmc_ad8 MODE0 | INPUT | PULLUP */
0x024 0x30 /* gpmc_ad9.gpmc_ad9 MODE0 | INPUT | PULLUP */
0x028 0x30 /* gpmc_ad10.gpmc_ad10 MODE0 | INPUT | PULLUP */
0x02C 0x30 /* gpmc_ad11.gpmc_ad11 MODE0 | INPUT | PULLUP */
0x030 0x30 /* gpmc_ad12.gpmc_ad12 MODE0 | INPUT | PULLUP */
0x034 0x30 /* gpmc_ad13.gpmc_ad13 MODE0 | INPUT | PULLUP */
0x038 0x30 /* gpmc_ad14.gpmc_ad14 MODE0 | INPUT | PULLUP */
0x03C 0x30 /* gpmc_ad15.gpmc_ad15 MODE0 | INPUT | PULLUP */
0x080 0x08 /* gpmc_cscn1.gpmc_cscn1 MODE0 | OUTPUT */
0x08C 0x28 /* gpmc_clk.gpmc_clk MODE0 | INPUT */
0x090 0x08 /* gpmc_advn_ale.gpmc_advn_ale MODE0 | OUTPUT */
0x094 0x08 /* gpmc_oen_ren.gpmc_oen_ren MODE0 | OUTPUT */
0x098 0x08 /* gpmc_wen.gpmc_wen MODE0 | OUTPUT */
0x09C 0x08 /* gpmc_ben0_cle.gpmc_ben0_cle MODE0 | OUTPUT */
0x078 0x08 /* gpmc_ben1_cle.gpmc_ben1_cle MODE0 | OUTPUT */
>;
};
fpga_config_pins: pinmux_fpga_config_pins {
pinctrl-single,pins = <
/* config clk and data */
0x198 0x37 /* spi1_d1 MODE3 | INPUT | PULLUP , serial data config */
0x190 0x37 /* spi1_sclk MODE3 | INPUT | PULLUP, serial clock config */
>;
};
};
};
fragment@1 {
target = <&gpmc>;
depth = <1>; /* only create devices on depth 1 */
/* stupid warnings */
#address-cells = <1>;
#size-cells = <1>;
__overlay__ {
status = "okay";
#address-cells = <2>;
#size-cells = <1>;
pinctrl-names = "default";
pinctrl-0 = <&gpmc_pins>;
/* chip select ranges */
ranges = <1 0 0x01000000 0x1000000>;
camera{
compatible = "logibone";
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&fpga_config_pins>;
/*reset = <&rstctl 0 0>;*/
/*reset-names = "eMMC_RSTn-LOGIBONE";*/
reg = <1 0 0x01000000>; /*CSn1*/
bank-width = <2>; /* GPMC_CONFIG1_DEVICESIZE(1) */
/*gpmc,burst-write;*/
gpmc,burst-read;
gpmc,burst-wrap;
gpmc,sync-read; /* GPMC_CONFIG1_READTYPE_ASYNC */
gpmc,sync-write; /* GPMC_CONFIG1_WRITETYPE_ASYNC */
gpmc,clk-activation-ns = <0>; /* GPMC_CONFIG1_CLKACTIVATIONTIME(2) */
gpmc,burst-length = <16>; /* GPMC_CONFIG1_PAGE_LEN(2) */
gpmc,mux-add-data = <2>; /* GPMC_CONFIG1_MUXTYPE(2) */
gpmc,sync-clk-ps = <20000>; /* CONFIG2 */
gpmc,cs-on-ns = <0>;
gpmc,cs-rd-off-ns = <100>;
gpmc,cs-wr-off-ns = <60>;
gpmc,adv-on-ns = <0>; /* CONFIG3 */
gpmc,adv-rd-off-ns = <20>;
gpmc,adv-wr-off-ns = <20>;
gpmc,we-on-ns = <20>; /* CONFIG4 */
gpmc,we-off-ns = <60>;
gpmc,oe-on-ns = <20>;
gpmc,oe-off-ns = <100>;
gpmc,page-burst-access-ns = <20>; /* CONFIG 5 */
gpmc,access-ns = <80>;
gpmc,rd-cycle-ns = <120>;
gpmc,wr-cycle-ns = <80>;
gpmc,wr-access-ns = <40>; /* CONFIG 6 */
gpmc,wr-data-mux-bus-ns = <20>;
/*gpmc,bus-turnaround-ns = <40>;*/ /* CONFIG6:3:0 = 4 */
/*gpmc,cycle2cycle-samecsen;*/ /* CONFIG6:7 = 1 */
/*gpmc,cycle2cycle-delay-ns = <40>;*/ /* CONFIG6:11:8 = 4 */
/* not using dma engine yet, but we can get the channel number here */
dmas = <&edma 20>;
dma-names = "logibone";
fpga,config {
i2c-adapter = <&i2c2>;
/* need it to stop the whinning */
#address-cells = <1>;
#size-cells = <0>;
/* fake i2c device node */
pca9534 {
compatible = "logibone";
reg = <0x24>;
};
};
};
};
};
fragment@2 {
target = <&spi0>;
__overlay__ {
#address-cells = <1>;
#size-cells = <0>;
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&fpga_config_pins>;
spi0_0{
#address-cells = <1>;
#size-cells = <0>;
compatible = "spidev";
reg = <0>;
spi-max-frequency = <16000000>;
spi-cpha;
};
spi0_1{
#address-cells = <1>;
#size-cells = <0>;
compatible = "spidev";
reg = <1>;
spi-max-frequency = <16000000>;
// Mode 0 (CPOL = 0, CPHA = 0)
};
};
};
};
RobertCNelson
jcdevel
I am testing this using the Logibone Cape. I am using am335x-boneblack-overlay.dtb during boot. This should disable eMMC as well as HDMI (Video/Audio). I have modified the original .dts file by commenting out the eEMMC reset pin which would otherwise cause a conflict.
I am measung at pin P8.10 (GPMC_WEN). When writing to /dev/logibone_mem this pin should get asserted. This works fine using the old Kernel 3.8 but fails using Kernel 4.1.x+.
Is there any example for using the GPMC under Kernel 4.1.x+?