i.MX ProcessorsのトピックRe: how to setup GPMI NAND timing

how to setup GPMI NAND timing

x10 — Mon, 27 Aug 2012 08:54:14 GMT

Hi, all

In Linux gpmi nand driver for imx28evk, I can not find the code to setup timing parameters into hardware registers. For example, in gpmi-nfc-hal-v1.c, the funtion set_timing(...) doesn't really write nfc's hardware registers, the function is as follows:

/**
* set_timing() - Configures the NFC timing.
*
* @this: Per-device data.
* @timing: The timing of interest.
*/
static int set_timing(struct gpmi_nfc_data *this,
const struct gpmi_nfc_timing *timing)
{
struct nfc_hal *nfc = this->nfc;

/* Accept the new timing. */

nfc->timing = *timing;

/* Return success. */

return 0;

}

Some helps are needed for me to figure this problem out. Thanks very much.

Cheng Shi

Emtronix

Re: how to setup GPMI NAND timing

x10 — Fri, 31 Aug 2012 09:06:45 GMT

I'm sure that no real NAND timing setup is done in gpmi_nfc_hal_v1.c. As there are default settings which can work on most of Nandflash chips, all the nandflash r/w work ok.

Re: how to setup GPMI NAND timing

HuangShijie — Fri, 12 Oct 2012 01:49:39 GMT

yes.

But if the EDO mode is enabled with the ONFI nand.

The timing setting will be changed.

You can read the latest Linus's kernel for reference.