need help with GPIO
Laxmikant Rashinkar
lk.atwork at yahoo.com
Tue Sep 2 11:21:03 EST 2008
Hi,
I have a MPC8347 based embedded PC running Linux 2.6.27.
I am trying to access a NAND device connected to the LBC and UPM.
The Ready/Busy* pin of the NAND device is connected to the built in GPIO-1 on pin 4 (input).
When I try to access the NAND device, the function of_get_gpio() from drivers/of/gpio.c gets called, and
it reports that my GPIO is not registered. Here are the actual debug messages:
LK_DEBUG: gpio.c : of_get_gpio : name=upm type=<NULL> index=0
LK_DEBUG: gpio.c : of_get_gpio : got property
LK_DEBUG: gpio.c : of_get_gpio : nr_cell=3
LK_DEBUG: gpio.c : of_get_gpio : gc.name=gpio-controller gc.type=<NULL> gc->Data=0x0
LK_DEBUG: gpio.c : of_get_gpio : /localbus/upm at 1,0: gpio controller /soc8349 at e0000000/gpio-controller at e0000c00: is not registered
When I check in /proc/device-tree/soc8349 at e0000000/, I find that entries are present for both GPIOs are present.
Here are debug registration messages, indicating that gpio registered successfully:
##### LK_DEBUG: of_plat_dev_create : NAME=soc8349
##### LK_DEBUG: of_plat_dev_create : NAME=wdt
##### LK_DEBUG: of_plat_dev_create : NAME=i2c
##### LK_DEBUG: of_plat_dev_create : NAME=i2c
##### LK_DEBUG: of_plat_dev_create : NAME=spi
##### LK_DEBUG: of_plat_dev_create : NAME=dma
##### LK_DEBUG: of_plat_dev_create : NAME=usb
##### LK_DEBUG: of_plat_dev_create : NAME=usb
##### LK_DEBUG: of_plat_dev_create : NAME=mdio
##### LK_DEBUG: of_plat_dev_create : NAME=ethernet
##### LK_DEBUG: of_plat_dev_create : NAME=ethernet
##### LK_DEBUG: of_plat_dev_create : NAME=serial
##### LK_DEBUG: of_plat_dev_create : NAME=serial
##### LK_DEBUG: of_plat_dev_create : NAME=crypto
##### LK_DEBUG: of_plat_dev_create : NAME=pic
##### LK_DEBUG: of_plat_dev_create : NAME=gpio-controller
##### LK_DEBUG: of_plat_dev_create : NAME=gpio-controller
##### LK_DEBUG: of_plat_dev_create : NAME=localbus
##### LK_DEBUG: of_plat_dev_create : NAME=upm
Most probably something is wrong in my device tree (listed below). Can someone please point me in the right direction?
thanks a lot for your help.
LK
-------------------------------------------------------------
/*
* MPC8349E MDS Device Tree Source
*
* Copyright 2005, 2006 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
/dts-v1/;
/ {
model = "MPC8349EMDS";
compatible = "MPC8349EMDS", "MPC834xMDS", "MPC83xxMDS";
#address-cells = <1>;
#size-cells = <1>;
aliases {
ethernet0 = &enet0;
ethernet1 = &enet1;
serial0 = &serial0;
serial1 = &serial1;
pci0 = &pci0;
pci1 = &pci1;
};
cpus {
#address-cells = <1>;
#size-cells = <0>;
PowerPC,8349 at 0 {
device_type = "cpu";
reg = <0x0>;
d-cache-line-size = <32>;
i-cache-line-size = <32>;
d-cache-size = <32768>;
i-cache-size = <32768>;
timebase-frequency = <0>; // from bootloader
bus-frequency = <0>; // from bootloader
clock-frequency = <0>; // from bootloader
};
};
memory {
device_type = "memory";
reg = <0x00000000 0x10000000>; // 256MB at 0
};
bcsr at e2400000 {
device_type = "board-control";
reg = <0xe2400000 0x8000>;
};
soc8349 at e0000000 {
#address-cells = <1>;
#size-cells = <1>;
device_type = "soc";
compatible = "simple-bus";
ranges = <0x0 0xe0000000 0x00100000>;
reg = <0xe0000000 0x00000200>;
bus-frequency = <0>;
wdt at 200 {
device_type = "watchdog";
compatible = "mpc83xx_wdt";
reg = <0x200 0x100>;
};
i2c at 3000 {
#address-cells = <1>;
#size-cells = <0>;
cell-index = <0>;
compatible = "fsl-i2c";
reg = <0x3000 0x100>;
interrupts = <14 0x8>;
interrupt-parent = <&ipic>;
dfsrr;
rtc at 68 {
compatible = "dallas,ds1374";
reg = <0x68>;
};
};
i2c at 3100 {
#address-cells = <1>;
#size-cells = <0>;
cell-index = <1>;
compatible = "fsl-i2c";
reg = <0x3100 0x100>;
interrupts = <15 0x8>;
interrupt-parent = <&ipic>;
dfsrr;
};
spi at 7000 {
cell-index = <0>;
compatible = "fsl,spi";
reg = <0x7000 0x1000>;
interrupts = <16 0x8>;
interrupt-parent = <&ipic>;
mode = "cpu";
};
dma at 82a8 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,mpc8349-dma", "fsl,elo-dma";
reg = <0x82a8 4>;
ranges = <0 0x8100 0x1a8>;
interrupt-parent = <&ipic>;
interrupts = <71 8>;
cell-index = <0>;
dma-channel at 0 {
compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
reg = <0 0x80>;
interrupt-parent = <&ipic>;
interrupts = <71 8>;
};
dma-channel at 80 {
compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
reg = <0x80 0x80>;
interrupt-parent = <&ipic>;
interrupts = <71 8>;
};
dma-channel at 100 {
compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
reg = <0x100 0x80>;
interrupt-parent = <&ipic>;
interrupts = <71 8>;
};
dma-channel at 180 {
compatible = "fsl,mpc8349-dma-channel", "fsl,elo-dma-channel";
reg = <0x180 0x28>;
interrupt-parent = <&ipic>;
interrupts = <71 8>;
};
};
/* phy type (ULPI or SERIAL) are only types supported for MPH */
/* port = 0 or 1 */
usb at 22000 {
compatible = "fsl-usb2-mph";
reg = <0x22000 0x1000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <&ipic>;
interrupts = <39 0x8>;
phy_type = "ulpi";
port1;
};
/* phy type (ULPI, UTMI, UTMI_WIDE, SERIAL) */
usb at 23000 {
compatible = "fsl-usb2-dr";
reg = <0x23000 0x1000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <&ipic>;
interrupts = <38 0x8>;
dr_mode = "otg";
phy_type = "ulpi";
};
mdio at 24520 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,gianfar-mdio";
reg = <0x24520 0x20>;
phy0: ethernet-phy at 0 {
interrupt-parent = <&ipic>;
interrupts = <17 0x8>;
reg = <0x1>;
device_type = "ethernet-phy";
};
phy1: ethernet-phy at 1 {
interrupt-parent = <&ipic>;
interrupts = <18 0x8>;
reg = <0x2>;
device_type = "ethernet-phy";
};
};
enet0: ethernet at 24000 {
cell-index = <0>;
device_type = "network";
model = "TSEC";
compatible = "gianfar";
reg = <0x24000 0x1000>;
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <32 0x8 33 0x8 34 0x8>;
interrupt-parent = <&ipic>;
phy-handle = <&phy0>;
linux,network-index = <0>;
};
enet1: ethernet at 25000 {
cell-index = <1>;
device_type = "network";
model = "TSEC";
compatible = "gianfar";
reg = <0x25000 0x1000>;
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <35 0x8 36 0x8 37 0x8>;
interrupt-parent = <&ipic>;
phy-handle = <&phy1>;
linux,network-index = <1>;
};
serial0: serial at 4500 {
cell-index = <0>;
device_type = "serial";
compatible = "ns16550";
reg = <0x4500 0x100>;
clock-frequency = <0>;
interrupts = <9 0x8>;
interrupt-parent = <&ipic>;
};
serial1: serial at 4600 {
cell-index = <1>;
device_type = "serial";
compatible = "ns16550";
reg = <0x4600 0x100>;
clock-frequency = <0>;
interrupts = <10 0x8>;
interrupt-parent = <&ipic>;
};
crypto at 30000 {
compatible = "fsl,sec2.0";
reg = <0x30000 0x10000>;
interrupts = <11 0x8>;
interrupt-parent = <&ipic>;
fsl,num-channels = <4>;
fsl,channel-fifo-len = <24>;
fsl,exec-units-mask = <0x7e>;
fsl,descriptor-types-mask = <0x01010ebf>;
};
/* IPIC
* interrupts cell = <intr #, sense>
* sense values match linux IORESOURCE_IRQ_* defines:
* sense == 8: Level, low assertion
* sense == 2: Edge, high-to-low change
*/
ipic: pic at 700 {
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <2>;
reg = <0x700 0x100>;
device_type = "ipic";
};
gpio1: gpio-controller at e0000c00 {
#gpio-cells = <2>;
compatible = "fsl,mpc8349-gpio-bank";
reg = <0xe0000c00 0x100>;
gpio-controller;
};
gpio2: gpio-controller at e0000d00 {
#gpio-cells = <2>;
compatible = "fsl,mpc8349-gpio-bank";
reg = <0xe0000d00 0x100>;
gpio-controller;
};
};
localbus {
compatible = "fsl,pq3-localbus", "simple-bus";
#address-cells = <2>;
#size-cells = <1>;
reg = <0xe0005000 0x100000>; // BRx, ORx, etc.
upm at 1,0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,upm-nand";
reg = <3 0xa0000000 0x800>;
fsl,upm-addr-offset = <0x10>;
fsl,upm-cmd-offset = <0x08>;
gpios = <&gpio1 4 0>;
nand at 0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "fsl,lbc-nand";
partition at 0 {
label = "EVERYTHING";
reg = <0x00000000 0x01000000>;
};
};
};
};
pci0: pci at e0008500 {
cell-index = <1>;
interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
interrupt-map = <
/* IDSEL 0x11 */
0x8800 0x0 0x0 0x1 &ipic 20 0x8
0x8800 0x0 0x0 0x2 &ipic 21 0x8
0x8800 0x0 0x0 0x3 &ipic 22 0x8
0x8800 0x0 0x0 0x4 &ipic 23 0x8
/* IDSEL 0x12 */
0x9000 0x0 0x0 0x1 &ipic 22 0x8
0x9000 0x0 0x0 0x2 &ipic 23 0x8
0x9000 0x0 0x0 0x3 &ipic 20 0x8
0x9000 0x0 0x0 0x4 &ipic 21 0x8
/* IDSEL 0x13 */
0x9800 0x0 0x0 0x1 &ipic 23 0x8
0x9800 0x0 0x0 0x2 &ipic 20 0x8
0x9800 0x0 0x0 0x3 &ipic 21 0x8
0x9800 0x0 0x0 0x4 &ipic 22 0x8
/* IDSEL 0x15 */
0xa800 0x0 0x0 0x1 &ipic 20 0x8
0xa800 0x0 0x0 0x2 &ipic 21 0x8
0xa800 0x0 0x0 0x3 &ipic 22 0x8
0xa800 0x0 0x0 0x4 &ipic 23 0x8
/* IDSEL 0x16 */
0xb000 0x0 0x0 0x1 &ipic 23 0x8
0xb000 0x0 0x0 0x2 &ipic 20 0x8
0xb000 0x0 0x0 0x3 &ipic 21 0x8
0xb000 0x0 0x0 0x4 &ipic 22 0x8
/* IDSEL 0x17 */
0xb800 0x0 0x0 0x1 &ipic 22 0x8
0xb800 0x0 0x0 0x2 &ipic 23 0x8
0xb800 0x0 0x0 0x3 &ipic 20 0x8
0xb800 0x0 0x0 0x4 &ipic 21 0x8
/* IDSEL 0x18 */
0xc000 0x0 0x0 0x1 &ipic 21 0x8
0xc000 0x0 0x0 0x2 &ipic 22 0x8
0xc000 0x0 0x0 0x3 &ipic 23 0x8
0xc000 0x0 0x0 0x4 &ipic 20 0x8>;
interrupt-parent = <&ipic>;
interrupts = <66 0x8>;
bus-range = <0 0>;
ranges = <0x02000000 0x0 0x90000000 0x90000000 0x0 0x10000000
0x42000000 0x0 0x80000000 0x80000000 0x0 0x10000000
0x01000000 0x0 0x00000000 0xe2000000 0x0 0x00100000>;
clock-frequency = <66666666>;
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
reg = <0xe0008500 0x100>;
compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
pci1: pci at e0008600 {
cell-index = <2>;
interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
interrupt-map = <
/* IDSEL 0x11 */
0x8800 0x0 0x0 0x1 &ipic 20 0x8
0x8800 0x0 0x0 0x2 &ipic 21 0x8
0x8800 0x0 0x0 0x3 &ipic 22 0x8
0x8800 0x0 0x0 0x4 &ipic 23 0x8
/* IDSEL 0x12 */
0x9000 0x0 0x0 0x1 &ipic 22 0x8
0x9000 0x0 0x0 0x2 &ipic 23 0x8
0x9000 0x0 0x0 0x3 &ipic 20 0x8
0x9000 0x0 0x0 0x4 &ipic 21 0x8
/* IDSEL 0x13 */
0x9800 0x0 0x0 0x1 &ipic 23 0x8
0x9800 0x0 0x0 0x2 &ipic 20 0x8
0x9800 0x0 0x0 0x3 &ipic 21 0x8
0x9800 0x0 0x0 0x4 &ipic 22 0x8
/* IDSEL 0x15 */
0xa800 0x0 0x0 0x1 &ipic 20 0x8
0xa800 0x0 0x0 0x2 &ipic 21 0x8
0xa800 0x0 0x0 0x3 &ipic 22 0x8
0xa800 0x0 0x0 0x4 &ipic 23 0x8
/* IDSEL 0x16 */
0xb000 0x0 0x0 0x1 &ipic 23 0x8
0xb000 0x0 0x0 0x2 &ipic 20 0x8
0xb000 0x0 0x0 0x3 &ipic 21 0x8
0xb000 0x0 0x0 0x4 &ipic 22 0x8
/* IDSEL 0x17 */
0xb800 0x0 0x0 0x1 &ipic 22 0x8
0xb800 0x0 0x0 0x2 &ipic 23 0x8
0xb800 0x0 0x0 0x3 &ipic 20 0x8
0xb800 0x0 0x0 0x4 &ipic 21 0x8
/* IDSEL 0x18 */
0xc000 0x0 0x0 0x1 &ipic 21 0x8
0xc000 0x0 0x0 0x2 &ipic 22 0x8
0xc000 0x0 0x0 0x3 &ipic 23 0x8
0xc000 0x0 0x0 0x4 &ipic 20 0x8>;
interrupt-parent = <&ipic>;
interrupts = <67 0x8>;
bus-range = <0 0>;
ranges = <0x02000000 0x0 0xb0000000 0xb0000000 0x0 0x10000000
0x42000000 0x0 0xa0000000 0xa0000000 0x0 0x10000000
0x01000000 0x0 0x00000000 0xe2100000 0x0 0x00100000>;
clock-frequency = <66666666>;
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
reg = <0xe0008600 0x100>;
compatible = "fsl,mpc8349-pci";
device_type = "pci";
};
chosen {
linux,stdout-path = &serial0;
};
};
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