Hello All,
I have mpc8313erdb evaluation board and writing GPIO driver for it. I
know that it is not possible to use directly hardware_irq_number given
from the processor manual. In my case hardware _irq_number is 74 (for
GPIO). As request_irq uses the virtual irq.
So to know or determine what virtual irq it gives I tried with
irq_create_mapping and passed host = NULL and hwirq = 74.
virt_irq = irq_create_mapping (NULL, 74);
the value it gives me is the same as hwirq no. i.e. 74. also the
module is inserted properly and the GPIO is toggling.
1. Here I would like to ask is the way I have done is right ? ? ?
especially the host parameter I have set to NULL; as in this case it
uses default controller, so I chose to use NULL.
2. Also I would like to ask how I can determine the virtual irq using
irq_of_parse_and_map (struct device_node *dev, int index) ? ? ?
here I am not getting what I should pass *dev and index ? ? ? as in my
mpc8313erdb.dts I could not find any node name 'gpio' so I do not know
what I can use ...
Kindly please acknowledge ... thank you ...
Following is the content of mpc8313erdb.dts
###################### Start #############################
/*
* MPC8313E RDB Device Tree Source */
/ {
model = "MPC8313ERDB";
compatible = "mpc83xx";
#address-cells = <1>;
#size-cells = <1>;
cpus {
#cpus = <1>;
#address-cells = <1>;
#size-cells = <0>;
PowerPC,8...@0 {
device_type = "cpu";
reg = <0>;
d-cache-line-size = <20>; // 32 bytes
i-cache-line-size = <20>; // 32 bytes
d-cache-size = <4000>; // L1, 16K
i-cache-size = <4000>; // L1, 16K
timebase-frequency = <0>; // from bootloader
bus-frequency = <0>; // from bootloader
clock-frequency = <0>; // from bootloader
32-bit;
};
};
memory {
device_type = "memory";
reg = <00000000 08000000>; // 128MB at 0
};
nand0 {
device_type = "nand";
compatible = "fsl-nand";
linux,phandle = <301>;
reg = <e2800000 2000>;
/*partitions = "nand0:1m(u-boot)ro,3m(kernel),-(jffs2)";*/
};
soc8...@e0000000 {
#address-cells = <1>;
#size-cells = <1>;
#interrupt-cells = <2>;
device_type = "soc";
ranges = <0 e0000000 00100000>;
reg = <e0000000 00000200>;
bus-frequency = <0>;
w...@200 {
device_type = "watchdog";
compatible = "mpc83xx_wdt";
reg = <200 100>;
};
i...@3000 {
device_type = "i2c";
compatible = "fsl-i2c";
reg = <3000 100>;
interrupts = <e 8>;
interrupt-parent = <700>;
dfsrr;
};
i...@3100 {
device_type = "i2c";
compatible = "fsl-i2c";
reg = <3100 100>;
interrupts = <f 8>;
interrupt-parent = <700>;
dfsrr;
};
s...@7000 {
device_type = "spi";
compatible = "mpc83xx_spi";
reg = <7000 1000>;
interrupts = <10 8>;
interrupt-parent = <700>;
mode = <0>;
};
/* phy type (ULPI, UTMI, UTMI_WIDE, SERIAL) */
u...@23000 {
device_type = "usb";
compatible = "fsl-usb2-dr";
reg = <23000 1000>;
#address-cells = <1>;
#size-cells = <0>;
interrupt-parent = <700>;
interrupts = <26 2>;
phy_type = "utmi_wide";
control_init = <00000280>; // UTMI ext 48 MHz clk
sleep = <b00 00300000>;
};
m...@24520 {
device_type = "mdio";
compatible = "gianfar";
reg = <24520 20>;
#address-cells = <1>;
#size-cells = <0>;
linux,phandle = <24520>;
ethernet-...@1 {
linux,phandle = <2452001>;
interrupt-parent = <700>;
interrupts = <13 2>;
reg = <1>;
device_type = "ethernet-phy";
};
ethernet-...@4 {
linux,phandle = <2452004>;
interrupt-parent = <700>;
interrupts = <14 2>;
reg = <4>;
device_type = "ethernet-phy";
};
};
ether...@24000 {
device_type = "network";
model = "eTSEC";
compatible = "gianfar";
reg = <24000 1000>;
regs_1588 = <24000 24fff>;
address = [ 00 00 00 00 00 00 ];
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <25 8 24 8 23 8>;
interrupt-parent = <700>;
phy-handle = <2452001>;
sleep = <b00 20000000>;
fsl,magic-packet;
};
ether...@25000 {
#address-cells = <1>;
#size-cells = <0>;
device_type = "network";
model = "eTSEC";
compatible = "gianfar";
reg = <25000 1000>;
regs_1588 = <24000 24fff>;
address = [ 00 00 00 00 00 00 ];
local-mac-address = [ 00 00 00 00 00 00 ];
interrupts = <22 8 21 8 20 8>;
interrupt-parent = <700>;
phy-handle = <2452004>;
sleep = <b00 10000000>;
fsl,magic-packet;
};
ser...@4500 {
device_type = "serial";
compatible = "ns16550";
reg = <4500 100>;
clock-frequency = <0>;
interrupts = <9 8>;
interrupt-parent = <700>;
};
ser...@4600 {
device_type = "serial";
compatible = "ns16550";
reg = <4600 100>;
clock-frequency = <0>;
interrupts = <a 8>;
interrupt-parent = <700>;
};
p...@8500 {
interrupt-map-mask = <f800 0 0 7>;
interrupt-map = <
/* IDSEL 0x0E -mini PCI */
7000 0 0 1 700 12 8
7000 0 0 2 700 12 8
7000 0 0 3 700 12 8
7000 0 0 4 700 12 8
/* IDSEL 0x0F - PCI slot */
7800 0 0 1 700 11 8
7800 0 0 2 700 12 8
7800 0 0 3 700 11 8
7800 0 0 4 700 12 8>;
interrupt-parent = <700>;
interrupts = <42 8>;
bus-range = <0 0>;
ranges = <02000000 0 90000000 90000000 0 10000000
42000000 0 80000000 80000000 0 10000000
01000000 0 00000000 e2000000 0 00100000>;
clock-frequency = <3f940aa>;
#interrupt-cells = <1>;
#size-cells = <2>;
#address-cells = <3>;
reg = <8500 100>;
compatible = "83xx";
device_type = "pci";
sleep = <b00 00010000>;
};
/* May need to remove if on a part without crypto engine */
cry...@30000 {
device_type = "crypto";
model = "SEC2";
compatible = "talitos";
reg = <30000 10000>;
interrupts = <b 8>;
interrupt-parent = <700>;
num-channels = <4>;
channel-fifo-len = <18>;
exec-units-mask = <0000007e>;
/* desc mask is for rev2.0,
* we need runtime fixup for >2.0 */
descriptor-types-mask = <01010ebf>;
sleep = <b00 03000000>;
};
/* IPIC
* interrupts cell = <intr #, sense>
* sense values match linux IORESOURCE_IRQ_* defines:
* sense == 8: Level, low assertion
* sense == 2: Edge, high-to-low change
*/
p...@700 {
linux,phandle = <700>;
interrupt-controller;
#address-cells = <0>;
#interrupt-cells = <2>;
reg = <700 100>;
built-in;
device_type = "ipic";
};
e...@5000 {
linux,phandle = <5000>;
device_type = "elbc";
compatible = "fsl-elbc";
reg = <5000 1000>;
interrupts = <4d 8>;
interrupt-parent = <700>;
};
po...@b00 {
linux,phandle = <b00>;
device_type = "power";
compatible = "fsl,mpc831x-pmc", "fsl,mpc83xx-pmc";
reg = <b00 100
a00 100>;
interrupts = <50 8>;
interrupt-parent = <700>;
};
ti...@500 {
linux,phandle = <500>;
device_type = "timer";
compatible = "fsl,mpc831x-gtm", "fsl,mpc83xx-gtm";
reg = <500 100>;
interrupts = <48 8>;
interrupt-parent = <700>;
};
};
};
Kind Regards,
Vijay Nikam
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