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by BleakHouse
Thu Mar 14, 2019 10:04 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

In case it's helpful to anyone else compiling a kernel: It's necessary to apt-get install bison, flex and libssl-dev before attempting to build the kernel. If looking at vcdbg log and it's filled with memory allocation errors, try disabling the OpenGL driver, something in there is trying to allocate...
by BleakHouse
Thu Mar 14, 2019 3:52 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

Yes it shows at address 0x20 as I said in my original post. i2cdetect -y 1 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 20: 20 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- ...
by BleakHouse
Thu Mar 14, 2019 3:08 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

grep rmi4 /lib/modules/`uname -r`/modules.alias Returns nothing. [email protected]:~ $ sudo modprobe configs [email protected]:~ $ zcat /proc/config.gz | grep RMI4 CONFIG_RMI4_CORE=y CONFIG_RMI4_I2C=y CONFIG_RMI4_SPI=y CONFIG_RMI4_SMB=y CONFIG_RMI4_F03=y CONFIG_RMI4_F03_SERIO=y CONFIG_RMI4_2D_SENSOR=y CONFIG_RMI4_F11=...
by BleakHouse
Thu Mar 14, 2019 2:23 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

Yes, I am doing it again right now.
by BleakHouse
Thu Mar 14, 2019 2:17 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

Code: Select all

 zcat /proc/config.gz | grep RMI4
 CONFIG_RMI4_CORE is not set
"/lib/modules/4.19.27-v7+/kernel/drivers/input" does not contain a rmi4 directory.
by BleakHouse
Thu Mar 14, 2019 1:55 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

I have already run sudo depmod with no effect. The grep still returns nothing.
by BleakHouse
Thu Mar 14, 2019 12:18 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

Re: synaptics rmi4-i2c, driver doesn't load

Assuming this is true, have you updated the aliases file?

Code: Select all

$ grep rmi4 /lib/modules/`uname -r`/modules.alias
Did not return anything, so apparently not.
I have no idea how to do that.

Dan
by BleakHouse
Wed Mar 13, 2019 11:03 pm
Forum: Device Tree
Topic: synaptics rmi4-i2c, driver doesn't load
Replies: 16
Views: 1845

synaptics rmi4-i2c, driver doesn't load

I am trying to get a touchscreen to work on my Pi3. It has a Synaptics S7501B chip on it. I have not been able to find much information on it, but I believe it uses i2c as it's interface. I have it connected to the pi and i2cdetect sees it at address 0x20. I have written a device tree overlay and co...
by BleakHouse
Mon Feb 18, 2013 12:23 am
Forum: RISCOS
Topic: gcc and RISC OS
Replies: 95
Views: 19089

Re: gcc and RISC OS

This thread has gone many different places. It would be very helpful to me if someone could post some c code that reads and writes GPIOs. I can compile c.HelloWorld and have some code written under Raspbian that runs fine but I would like the OS to get out of the way. I think I'm in the right place....

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