On Wed, 19 Jul 2017 17:17:59 +0530
Abhishek Sahu <absahu@xxxxxxxxxxxxxx> wrote:
> Currently driver data is being assigned directly with ECC modes.
> Now, the plan is to add more NAND controller versions, so
> reorganized the current driver data assignment by creating NAND
> controller properties structure. This will contain all
> properties specific to NAND controller.
>
> Signed-off-by: Abhishek Sahu <absahu@xxxxxxxxxxxxxx>
> ---
> drivers/mtd/nand/qcom_nandc.c | 23 +++++++++++++++++------
> 1 file changed, 17 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c
> index 8f9e86c..3b0ae91 100644
> --- a/drivers/mtd/nand/qcom_nandc.c
> +++ b/drivers/mtd/nand/qcom_nandc.c
> @@ -235,7 +235,7 @@ struct nandc_regs {
> * writes. contains the register values to be
> * written to controller
> * @cmd1/vld: some fixed controller register values
> - * @ecc_modes: supported ECC modes by the current controller,
> + * @props: properties of current NAND controller IP,
> * initialized via DT match data
> */
> struct qcom_nand_controller {
> @@ -266,7 +266,7 @@ struct qcom_nand_controller {
> struct nandc_regs *regs;
>
> u32 cmd1, vld;
> - u32 ecc_modes;
> + const struct qcom_props *props;
> };
>
> /*
> @@ -319,6 +319,15 @@ struct qcom_nand_host {
> u32 clrreadstatus;
> };
>
> +/*
> + * This data type corresponds to the nand controller properties which varies
> + * among different NAND controller IP's.
> + * @ecc_modes - ecc mode for NAND
> + */
> +struct qcom_props {
> + u32 ecc_modes;
> +};
> +
> static inline struct qcom_nand_host *to_qcom_nand_host(struct nand_chip *chip)
> {
> return container_of(chip, struct qcom_nand_host, chip);
> @@ -1820,7 +1829,7 @@ static int qcom_nand_host_setup(struct qcom_nand_host *host)
> * uses lesser bytes for ECC. If RS is used, the ECC bytes is
> * always 10 bytes
> */
> - if (nandc->ecc_modes & ECC_BCH_4BIT) {
> + if (nandc->props->ecc_modes & ECC_BCH_4BIT) {
> /* BCH */
> host->bch_enabled = true;
> ecc_mode = 0;
> @@ -2165,7 +2174,7 @@ static int qcom_nandc_probe(struct platform_device *pdev)
> return -ENODEV;
> }
>
> - nandc->ecc_modes = (unsigned long)dev_data;
> + nandc->props = dev_data;
>
> res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> nandc->base = devm_ioremap_resource(dev, res);
> @@ -2234,7 +2243,9 @@ static int qcom_nandc_remove(struct platform_device *pdev)
> return 0;
> }
>
> -#define EBI2_NANDC_ECC_MODES (ECC_RS_4BIT | ECC_BCH_8BIT)
> +static const struct qcom_props ebi2_nandc_data = {
> + .ecc_modes = (ECC_RS_4BIT | ECC_BCH_8BIT),
Just a nit: parenthesis are unneeded here.
> +};
>
> /*
> * data will hold a struct pointer containing more differences once we support
> @@ -2242,7 +2253,7 @@ static int qcom_nandc_remove(struct platform_device *pdev)
> */
> static const struct of_device_id qcom_nandc_of_match[] = {
> { .compatible = "qcom,ebi2-nandc",
> - .data = (void *)EBI2_NANDC_ECC_MODES,
> + .data = &ebi2_nandc_data,
> },
> {}
> };
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