need help with GPIO
Marco Stornelli
marco.stornelli at coritel.it
Tue Sep 2 16:39:05 EST 2008
Laxmikant Rashinkar ha scritto:
> 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";
> };
>
Here you are using absolute addresses but you should use an offset from
a base reg address, in your case e0000000.
> gpio1: gpio-controller at e0000c00 {
gpio1: gpio-controller at c00 {
> #gpio-cells = <2>;
> compatible = "fsl,mpc8349-gpio-bank";
reg = <0xc00 0x100>;
> reg = <0xe0000c00 0x100>;
> gpio-controller;
> };
>
gpio2: gpio-controller at d00 {
> gpio2: gpio-controller at e0000d00 {
> #gpio-cells = <2>;
> compatible = "fsl,mpc8349-gpio-bank";
reg = <0xd00 0x100>;
> 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;
> };
> };
>
>
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Linuxppc-embedded mailing list
> Linuxppc-embedded at ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-embedded
--
Marco Stornelli
Embedded Software Engineer
CoRiTeL - Consorzio di Ricerca sulle Telecomunicazioni
http://www.coritel.it
marco.stornelli at coritel.it
+39 06 72582838
More information about the Linuxppc-embedded
mailing list