Re: [PATCH 1/2] soc: mediatek: pwrap: add pwrap driver for MT8186 SoC

AngeloGioacchino Del Regno
2022-01-04T09:05:22Z

Il 30/12/21 12:49, Johnson Wang ha scritto:
> MT8186 are highly integrated SoC and use PMIC_MT6366 for
> power management. This patch adds pwrap master driver to
> access PMIC_MT6366.
>
> Signed-off-by: Johnson Wang <johnson.wang@mediatek.com>

Hello Johnson,
thanks for the patch!

However, there's something to improve...

> ---
> drivers/soc/mediatek/mtk-pmic-wrap.c | 86 ++++++++++++++++++++++++++--
> 1 file changed, 80 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index 952bc554f443..4af713274468 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -30,6 +30,7 @@
> #define PWRAP_GET_WACS_REQ(x) (((x) >> 19) & 0x00000001)
> #define PWRAP_STATE_SYNC_IDLE0 BIT(20)
> #define PWRAP_STATE_INIT_DONE0 BIT(21)
> +#define PWRAP_STATE_INIT_DONE0_V2 BIT(22)
> #define PWRAP_STATE_INIT_DONE1 BIT(15)
>
> /* macro for WACS FSM */
> @@ -77,6 +78,8 @@
> #define PWRAP_CAP_INT1_EN BIT(3)
> #define PWRAP_CAP_WDT_SRC1 BIT(4)
> #define PWRAP_CAP_ARB BIT(5)
> +#define PWRAP_CAP_MONITOR_V2 BIT(6)
> +#define PWRAP_CAP_ARB_V2 BIT(8)
>
> /* defines for slave device wrapper registers */
> enum dew_regs {
> @@ -1063,6 +1066,55 @@ static int mt8516_regs[] = {
> [PWRAP_MSB_FIRST] = 0x170,
> };
>
> +static int mt8186_regs[] = {
> + [PWRAP_MUX_SEL] = 0x0,
> + [PWRAP_WRAP_EN] = 0x4,
> + [PWRAP_DIO_EN] = 0x8,
> + [PWRAP_RDDMY] = 0x20,
> + [PWRAP_CSHEXT_WRITE] = 0x24,
> + [PWRAP_CSHEXT_READ] = 0x28,
> + [PWRAP_CSLEXT_WRITE] = 0x2C,
> + [PWRAP_CSLEXT_READ] = 0x30,
> + [PWRAP_EXT_CK_WRITE] = 0x34,
> + [PWRAP_STAUPD_CTRL] = 0x3C,
> + [PWRAP_STAUPD_GRPEN] = 0x40,
> + [PWRAP_EINT_STA0_ADR] = 0x44,
> + [PWRAP_EINT_STA1_ADR] = 0x48,
> + [PWRAP_INT_CLR] = 0xC8,
> + [PWRAP_INT_FLG] = 0xC4,
> + [PWRAP_MAN_EN] = 0x7C,
> + [PWRAP_MAN_CMD] = 0x80,
> + [PWRAP_WACS0_EN] = 0x8C,
> + [PWRAP_WACS1_EN] = 0x94,
> + [PWRAP_WACS2_EN] = 0x9C,
> + [PWRAP_INIT_DONE0] = 0x90,
> + [PWRAP_INIT_DONE1] = 0x98,
> + [PWRAP_INIT_DONE2] = 0xA0,
> + [PWRAP_INT_EN] = 0xBC,
> + [PWRAP_INT1_EN] = 0xCC,
> + [PWRAP_INT1_FLG] = 0xD4,
> + [PWRAP_INT1_CLR] = 0xD8,
> + [PWRAP_TIMER_EN] = 0xF0,
> + [PWRAP_WDT_UNIT] = 0xF8,
> + [PWRAP_WDT_SRC_EN] = 0xFC,
> + [PWRAP_WDT_SRC_EN_1] = 0x100,
> + [PWRAP_WDT_FLG] = 0x104,
> + [PWRAP_SPMINF_STA] = 0x1B4,
> + [PWRAP_DCM_EN] = 0x1EC,
> + [PWRAP_DCM_DBC_PRD] = 0x1F0,
> + [PWRAP_GPSINF_0_STA] = 0x204,
> + [PWRAP_GPSINF_1_STA] = 0x208,
> + [PWRAP_WACS0_CMD] = 0xC00,
> + [PWRAP_WACS0_RDATA] = 0xC04,
> + [PWRAP_WACS0_VLDCLR] = 0xC08,
> + [PWRAP_WACS1_CMD] = 0xC10,
> + [PWRAP_WACS1_RDATA] = 0xC14,
> + [PWRAP_WACS1_VLDCLR] = 0xC18,
> + [PWRAP_WACS2_CMD] = 0xC20,
> + [PWRAP_WACS2_RDATA] = 0xC24,
> + [PWRAP_WACS2_VLDCLR] = 0xC28,
> +};
> +
> enum pmic_type {
> PMIC_MT6323,
> PMIC_MT6351,
> @@ -1083,6 +1135,7 @@ enum pwrap_type {
> PWRAP_MT8135,
> PWRAP_MT8173,
> PWRAP_MT8183,
> + PWRAP_MT8186,
> PWRAP_MT8195,
> PWRAP_MT8516,
> };
> @@ -1535,6 +1588,7 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
> case PWRAP_MT6779:
> case PWRAP_MT6797:
> case PWRAP_MT8173:
> + case PWRAP_MT8186:
> case PWRAP_MT8516:
> pwrap_writel(wrp, 1, PWRAP_CIPHER_EN);
> break;
> @@ -2069,6 +2123,19 @@ static struct pmic_wrapper_type pwrap_mt8516 = {
> .init_soc_specific = NULL,
> };
>
> +static struct pmic_wrapper_type pwrap_mt8186 = {
> + .regs = mt8186_regs,
> + .type = PWRAP_MT8186,
> + .arb_en_all = 0xfb27f,
> + .int_en_all = 0xfffffffe, /* disable WatchDog Timeout for bit 1 */
> + .int1_en_all = 0x000017ff, /* disable Matching interrupt for bit 13 */
> + .spi_w = PWRAP_MAN_CMD_SPI_WRITE,
> + .wdt_src = PWRAP_WDT_SRC_MASK_ALL,
> + .caps = PWRAP_CAP_INT1_EN | PWRAP_CAP_MONITOR_V2 | PWRAP_CAP_ARB_V2,
> + .init_reg_clock = pwrap_common_init_reg_clock,
> + .init_soc_specific = NULL,
> +};
> +
> static const struct of_device_id of_pwrap_match_tbl[] = {
> {
> .compatible = "mediatek,mt2701-pwrap",
> @@ -2097,6 +2164,9 @@ static const struct of_device_id of_pwrap_match_tbl[] = {
> }, {
> .compatible = "mediatek,mt8183-pwrap",
> .data = &pwrap_mt8183,
> + }, {
> + .compatible = "mediatek,mt8186-pwrap",
> + .data = &pwrap_mt8186,
> }, {
> .compatible = "mediatek,mt8195-pwrap",
> .data = &pwrap_mt8195,
> @@ -2112,7 +2182,7 @@ MODULE_DEVICE_TABLE(of, of_pwrap_match_tbl);
> static int pwrap_probe(struct platform_device *pdev)
> {
> int ret, irq;
> - u32 mask_done;
> + u32 rdata;
> struct pmic_wrapper *wrp;
> struct device_node *np = pdev->dev.of_node;
> const struct of_device_id *of_slave_id = NULL;
> @@ -2207,12 +2277,16 @@ static int pwrap_probe(struct platform_device *pdev)
> }
> }
>
> - if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
> - mask_done = PWRAP_STATE_INIT_DONE1;
> + if (!HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))
> + rdata = pwrap_readl(wrp, PWRAP_WACS2_RDATA) &
> + PWRAP_STATE_INIT_DONE0;
> + else if (!HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB_V2))
> + rdata = pwrap_readl(wrp, PWRAP_WACS2_RDATA) &
> + PWRAP_STATE_INIT_DONE0_V2;

Why are you changing the logic here?
I think that assigning to `mask_done` is a good option, reducing duplication and
also reducing the amount of changes for this patch.

That said, I would simply do it as follows:

if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB))

mask_done = PWRAP_STATE_INIT_DONE1;

else if (HAS_CAP(wrp->master->caps, PWRAP_CAP_ARB_V2))

mask_done = PWRAP_STATE_INIT_DONE0_V2;

else

mask_done = PWRAP_STATE_INIT_DONE0;

Regards,
- Angelo