On Fri, 9 Nov 2018 10:30:41 +0530
Naga Sureshkumar Relli <naga.sureshkumar.re...@xilinx.com> wrote:

> +static int anfc_setup_data_interface(struct nand_chip *chip, int csline,
> +                                  const struct nand_data_interface *conf)
> +{
> +     struct anfc_nand_controller *nfc = to_anfc(chip->controller);
> +     struct anfc_nand_chip *achip = to_anfc_nand(chip);
> +     int err;
> +     const struct nand_sdr_timings *sdr;
> +     u32 inftimeval;
> +     bool change_sdr_clk = false;
> +
> +     if (csline == NAND_DATA_IFACE_CHECK_ONLY)
> +             return 0;
> +
> +     /*
> +      * If the controller is already in the same mode as flash device
> +      * then no need to change the timing mode again.
> +      */
> +     sdr = nand_get_sdr_timings(conf);
> +     if (IS_ERR(sdr))
> +             return PTR_ERR(sdr);
> +
> +     if (sdr->mode < 0)
> +             return -ENOTSUPP;
> +
> +     inftimeval = sdr->mode & 7;
> +     if (sdr->mode >= 2 && sdr->mode <= 5)
> +             change_sdr_clk = true;
> +     /*
> +      * SDR timing modes 2-5 will not work for the arasan nand when
> +      * freq > 90 MHz, so reduce the freq in SDR modes 2-5 to < 90Mhz

What's the freq for mode 0 and 1?

> +      */
> +     if (change_sdr_clk) {
> +             clk_disable_unprepare(nfc->clk_sys);
> +             err = clk_set_rate(nfc->clk_sys, SDR_MODE_DEFLT_FREQ);

You should not change the clk rate here. It should be done when the
chip is selected, so that, if you ever have 2 different chips connected
to the same controller, you can adapt the rate when they are accessed.

> +             if (err) {
> +                     dev_err(nfc->dev, "Can't set the clock rate\n");
> +                     return err;
> +             }
> +             err = clk_prepare_enable(nfc->clk_sys);
> +             if (err) {
> +                     dev_err(nfc->dev, "Unable to enable sys clock.\n");
> +                     clk_disable_unprepare(nfc->clk_sys);
> +                     return err;
> +             }
> +     }
> +     achip->inftimeval = inftimeval;
> +
> +     return 0;
> +}
> +
> +static int anfc_nand_attach_chip(struct nand_chip *chip)
> +{
> +     struct mtd_info *mtd = nand_to_mtd(chip);
> +     struct anfc_nand_chip *achip = to_anfc_nand(chip);
> +     u32 ret;
> +
> +     if (mtd->writesize <= SZ_512)
> +             achip->spare_caddr_cycles = 1;
> +     else
> +             achip->spare_caddr_cycles = 2;
> +
> +     chip->ecc.calc_buf = kmalloc(mtd->oobsize, GFP_KERNEL);
> +     chip->ecc.code_buf = kmalloc(mtd->oobsize, GFP_KERNEL);

Those bufs are allocated but never freed (memleak). Also, are you sure
you really need them.

Reply via email to