> -----Original Message-----
> From: Linus Walleij <linus.wall...@linaro.org>
> Sent: Monday, September 16, 2024 2:59 AM
> To: u-boot@lists.denx.de; Dario Binacchi
> <dario.binac...@amarulasolutions.com>; Michael Trimarchi
> <mich...@amarulasolutions.com>; Anand Gore
> <anand.g...@broadcom.com>; William Zhang
> <william.zh...@broadcom.com>; Kursad Oney
> <kursad.o...@broadcom.com>; Philippe Reynes
> <philippe.rey...@softathome.com>
> Cc: Linus Walleij <linus.wall...@linaro.org>
> Subject: [PATCH v2 5/7] mtd: rawnand: brcmnand: Add read data bus
> interface
>
> This is a port of the read data bus interface from the Linux
> brcmnand driver, commit
> 546e425991205f59281e160a0d0daed47b7ca9b3
> "mtd: rawnand: brcmnand: Add BCMBCA read data bus interface"
>
> This is needed for the BCMBCA RAW NAND driver.
>
> Signed-off-by: William Zhang <william.zh...@broadcom.com>
> Signed-off-by: Linus Walleij <linus.wall...@linaro.org>
> ---
> drivers/mtd/nand/raw/brcmnand/brcmnand.c | 20 +++++++++++++++++-
> --
> drivers/mtd/nand/raw/brcmnand/brcmnand.h | 2 ++
> 2 files changed, 19 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> index 552b239b95ae..2f786584a1ae 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
> @@ -769,6 +769,20 @@ static inline void brcmnand_write_fc(struct
> brcmnand_controller *ctrl,
> __raw_writel(val, ctrl->nand_fc + word * 4);
> }
>
> +static inline void brcmnand_read_data_bus(struct brcmnand_controller
> *ctrl,
> + void __iomem *flash_cache, u32
> *buffer, int fc_words)
> +{
> + struct brcmnand_soc *soc = ctrl->soc;
> + int i;
> +
> + if (soc && soc->read_data_bus) {
> + soc->read_data_bus(soc, flash_cache, buffer, fc_words);
> + } else {
> + for (i = 0; i < fc_words; i++)
> + buffer[i] = brcmnand_read_fc(ctrl, i);
> + }
> +}
> +
> static void brcmnand_clear_ecc_addr(struct brcmnand_controller *ctrl)
> {
>
> @@ -1812,7 +1826,7 @@ static int brcmnand_read_by_pio(struct
> mtd_info *mtd, struct nand_chip *chip,
> {
> struct brcmnand_host *host = nand_get_controller_data(chip);
> struct brcmnand_controller *ctrl = host->ctrl;
> - int i, j, ret = 0;
> + int i, ret = 0;
>
> brcmnand_clear_ecc_addr(ctrl);
>
> @@ -1825,8 +1839,8 @@ static int brcmnand_read_by_pio(struct
> mtd_info *mtd, struct nand_chip *chip,
> if (likely(buf)) {
> brcmnand_soc_data_bus_prepare(ctrl->soc, false);
>
> - for (j = 0; j < FC_WORDS; j++, buf++)
> - *buf = brcmnand_read_fc(ctrl, j);
> + brcmnand_read_data_bus(ctrl, ctrl->nand_fc, buf,
> FC_WORDS);
> + buf += FC_WORDS;
>
> brcmnand_soc_data_bus_unprepare(ctrl->soc, false);
> }
> diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> b/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> index 6946a62b0679..3a1d60471361 100644
> --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.h
> @@ -11,6 +11,8 @@ struct brcmnand_soc {
> void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en);
> void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare,
> bool is_param);
> + void (*read_data_bus)(struct brcmnand_soc *soc, void __iomem
> *flash_cache,
> + u32 *buffer, int fc_words);
> void *ctrl;
> };
>
>
> --
> 2.46.0Reviewed-by: William Zhang <william.zh...@broadcom.com>
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