On 1/30/26 06:17, Sohaib Mohamed wrote:
> Add RK3562 OTP support using rk3562-specific data configuration.
> 
> Signed-off-by: Sohaib Mohamed <[email protected]>

Acked-by: Ahmad Fatoum <[email protected]>

> ---
>  drivers/nvmem/rockchip-otp.c | 89 
> ++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 89 insertions(+)
> 
> diff --git a/drivers/nvmem/rockchip-otp.c b/drivers/nvmem/rockchip-otp.c
> index 33b242c5bc..d2145bba52 100644
> --- a/drivers/nvmem/rockchip-otp.c
> +++ b/drivers/nvmem/rockchip-otp.c
> @@ -51,6 +51,21 @@
>  
>  #define OTPC_TIMEOUT                 10000
>  
> +#define RK3562_NBYTES                        2
> +
> +/* RK3588 Register */
> +#define RK3582_OTPC_AUTO_CTRL        0x04
> +#define RK3582_OTPC_AUTO_EN          0x08
> +#define RK3582_OTPC_INT_ST           0x84
> +#define RK3582_OTPC_DOUT0            0x20
> +#define RK3582_NO_SECURE_OFFSET      0x300
> +#define RK3582_NBYTES                        4
> +#define RK3582_BURST_NUM             1
> +#define RK3582_BURST_SHIFT           8
> +#define RK3582_ADDR_SHIFT            16
> +#define RK3582_AUTO_EN                       BIT(0)
> +#define RK3582_RD_DONE                       BIT(1)
> +
>  #define RK3568_NBYTES                        2
>  
>  /* RK3588 Register */
> @@ -183,6 +198,65 @@ static int px30_otp_read(void *context, unsigned int 
> offset,
>       return ret;
>  }
>  
> +static int rk3562_otp_read(void *context, unsigned int offset, void *val,
> +                        size_t bytes)
> +{
> +     struct rockchip_otp *otp = context;
> +     unsigned int addr_start, addr_end, addr_offset, addr_len;
> +     u32 out_value;
> +     u8 *buf;
> +     int ret = 0, i = 0;
> +
> +     addr_start = rounddown(offset, RK3562_NBYTES) / RK3562_NBYTES;
> +     addr_end = roundup(offset + bytes, RK3562_NBYTES) / RK3562_NBYTES;
> +     addr_offset = offset % RK3562_NBYTES;
> +     addr_len = addr_end - addr_start;
> +
> +     buf = kzalloc(array3_size(addr_len, RK3562_NBYTES, sizeof(*buf)),
> +                   GFP_KERNEL);
> +     if (!buf)
> +             return -ENOMEM;
> +
> +     ret = rockchip_otp_reset(otp);
> +     if (ret) {
> +             dev_err(otp->dev, "failed to reset otp phy\n");
> +             goto out;
> +     }
> +
> +     ret = rockchip_otp_ecc_enable(otp, false);
> +     if (ret < 0) {
> +             dev_err(otp->dev, "rockchip_otp_ecc_enable err\n");
> +             goto out;
> +     }
> +
> +     writel(OTPC_USE_USER | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);
> +     udelay(5);
> +     while (addr_len--) {
> +             writel(addr_start++ | OTPC_USER_ADDR_MASK,
> +                    otp->base + OTPC_USER_ADDR);
> +             writel(OTPC_USER_FSM_ENABLE | OTPC_USER_FSM_ENABLE_MASK,
> +                    otp->base + OTPC_USER_ENABLE);
> +             ret = rockchip_otp_wait_status(otp, OTPC_INT_STATUS, 
> OTPC_USER_DONE);
> +             if (ret < 0) {
> +                     dev_err(otp->dev, "timeout during read setup\n");
> +                     goto read_end;
> +             }
> +             out_value = readl(otp->base + OTPC_USER_Q);
> +             memcpy(&buf[i], &out_value, RK3562_NBYTES);
> +             i += RK3562_NBYTES;
> +     }
> +
> +     memcpy(val, buf + addr_offset, bytes);
> +
> +read_end:
> +     writel(0x0 | OTPC_USE_USER_MASK, otp->base + OTPC_USER_CTRL);
> +out:
> +     kfree(buf);
> +
> +     return ret;
> +}
> +
> +
>  static int rk3568_otp_read(void *context, unsigned int offset, void *val,
>                          size_t bytes)
>  {
> @@ -328,6 +402,17 @@ static const struct rockchip_data px30_data = {
>       .reg_read = px30_otp_read,
>  };
>  
> +static const char * const rk3562_otp_clocks[] = {
> +     "usr", "sbpi", "apb", "phy",
> +};
> +
> +static const struct rockchip_data rk3562_data = {
> +     .size = 0x80,
> +     .clks = rk3562_otp_clocks,
> +     .num_clks = ARRAY_SIZE(rk3562_otp_clocks),
> +     .reg_read = rk3562_otp_read,
> +};
> +
>  static const char * const rk3568_otp_clocks[] = {
>       "usr", "sbpi", "apb", "phy",
>  };
> @@ -366,6 +451,10 @@ static __maybe_unused const struct of_device_id 
> rockchip_otp_match[] = {
>               .compatible = "rockchip,rk3308-otp",
>               .data = &px30_data,
>       },
> +     {
> +             .compatible = "rockchip,rk3562-otp",
> +             .data = &rk3562_data,
> +     },
>       {
>               .compatible = "rockchip,rk3568-otp",
>               .data = &rk3568_data,
> 


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