Re: [PATCH 6/7] ARM: socfpga: Enable Arria10 OCRAM ECC on startup

Dinh Nguyen
2016-03-30T17:18:41Z

On Wed, 30 Mar 2016, tthayer@opensource.altera.com wrote:

> From: Thor Thayer <tthayer@opensource.altera.com>
>
> Enable ECC for Arria10 On-Chip RAM on machine startup. The ECC has to be
> enabled before data is stored in memory otherwise the ECC will fail
> on reads.
>
> Signed-off-by: Thor Thayer <tthayer@opensource.altera.com>
> ---

[snip]

> +
> +void socfpga_init_arria10_ocram_ecc(void)
> +{
> + struct device_node *np;
> + int ret;
> +
> + /* Find the OCRAM EDAC device tree node */
> + np = of_find_compatible_node(NULL, NULL, "altr,socfpga-a10-ocram-ecc");
> + if (!np) {
> + pr_err("Unable to find socfpga-a10-ocram-ecc\n");
> + return;
> + }
> +
> + ret = altr_init_a10_ecc_block(np, A10_SYSMGR_ECC_INTSTAT_OCRAM,
> + ALTR_A10_OCRAM_ECC_EN_CTL, 0);

I think this is a no-no, you shouldn't be making a call directly into the driver
from here.

BR,
Dinh