TCAN4550: tcan4x5x driver giving unsupported version

Hi Pooja,

Since we already have a thread on this topic, let's consolidate the discussion there:

https://e2e.ti.com/support/interface/f/138/p/855657/3171152

Regards,
Max

hiii

i checked with the code in my dts file mram_cgf is as below

bosch,mram-cfg = <0x0 3 2 1 6 03 24 1>;
this configuration done by the M_CAN user manual CREL register..our  TCAN4550GYR part support m_can version " Bosch M_CAN Controller Area Network Revision 3.2.1.1 (3/24/2016)"

so i configure same but then also it is giving error as "tcan4x5x spi0.0: Unsupported version number:  0"

please help me to solve this error.

user manual i reffered

github.com/.../mcan_users_manual_v302.pdf

Hi Pooja,

You have the MRAM version correct.  Where did you find the syntax for how to set the bosch,mram-cfg parameter?  I'm wondering if there may be some error there.

Max

hi

Throgh this document i configured the mram  configuration. here they given the example of the configuration of maram CREL register

github.com/.../mcan_users_manual_v302.pdf

but i am not getting where i am going wrong

Hi Pooja,

Here is the code in the driver that checks the core release version:

static int m_can_check_core_release(struct m_can_classdev *cdev)
{
	u32 crel_reg;
	u8 rel;
	u8 step;
	int res;

	/* Read Core Release Version and split into version number
	 * Example: Version 3.2.1 => rel = 3; step = 2; substep = 1;
	 */
	crel_reg = m_can_read(cdev, M_CAN_CREL);
	rel = (u8)((crel_reg & CREL_REL_MASK) >> CREL_REL_SHIFT);
	step = (u8)((crel_reg & CREL_STEP_MASK) >> CREL_STEP_SHIFT);

	if (rel == 3) {
		/* M_CAN v3.x.y: create return value */
		res = 30 + step;
	} else {
		/* Unsupported M_CAN version */
		res = 0;
	}

	return res;
}

Can you see if the "rel," "step," and "substep" variables are getting assigned properly (to 3, 2, and 1 respectively)?

Regards,
Max

Hiii,

No,I am getting (0 0 0 ) for that,,,,how it is reading this values? It is reading from dts file or by hardware?????

hello,

Help me out to solve this issue,here i am  getting

crel_reg = 0;

rel =0;

step =0;

so how i have to get  value 3.2.1.i gone through whole code but where i am going wrong i am not getting.