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Message-ID: <621f9868-ec13-6c21-79ee-a9d2047bcb65@gmail.com>
Date: Wed, 2 May 2018 12:37:02 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: argus.lin@...iatek.com, Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>
Cc: Chenglin Xu <chenglin.xu@...iatek.com>,
Sean Wang <sean.wang@...iatek.com>, wsd_upstream@...iatek.com,
henryc.chen@...iatek.com, flora.fu@...iatek.com,
Chen Zhong <chen.zhong@...iatek.com>,
Christophe Jaillet <christophe.jaillet@...adoo.fr>,
"shailendra . v" <shailendra.v@...sung.com>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH V4 5/8] soc: mediatek: pwrap: add pwrap for mt6797 SoCs
On 05/02/2018 11:21 AM, argus.lin@...iatek.com wrote:
> From: Argus Lin <argus.lin@...iatek.com>
>
> mt6797 is a highly integrated SoCs, it uses mt6351 for power
> management. We need to add pwrap support to access mt6351.
> Pwrap of mt6797 support new feature include starvation and channel
> request exception interrupt, dynamic starvation priority
> adjustment mechanism.
>
> Signed-off-by: Argus Lin <argus.lin@...iatek.com>
> ---
> drivers/soc/mediatek/mtk-pmic-wrap.c | 110 ++++++++++++++++++++++++++++++++---
> 1 file changed, 102 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index a6366f147b79..0d4a2dae6912 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
[...]
> @@ -1076,11 +1126,14 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
> break;
> case PWRAP_MT2701:
> case PWRAP_MT8173:
> + case PWRAP_MT6797:
> pwrap_writel(wrp, 1, PWRAP_CIPHER_EN);
> break;
> case PWRAP_MT7622:
> pwrap_writel(wrp, 0, PWRAP_CIPHER_EN);
> break;
> + default:
> + break;
Why do we need that now?
> }
>
> /* Config cipher mode @PMIC */
> @@ -1325,6 +1378,15 @@ static irqreturn_t pwrap_interrupt(int irqno, void *dev_id)
>
> pwrap_writel(wrp, 0xffffffff, PWRAP_INT_CLR);
>
> + /* If we support INT1 interrupt, we also need to clear it */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN)) {
> + rdata = pwrap_readl(wrp, PWRAP_INT1_FLG);
> +
> + dev_err(wrp->dev, "unexpected interrupt int1=0x%x\n", rdata);
> +
> + pwrap_writel(wrp, rdata, PWRAP_INT1_CLR);
> + }
> +
This should go in 4/8. You will need to add PWRAP_INT1_FLG to the enum
pwrap_regs as well.
> return IRQ_HANDLED;
> }
>
> @@ -1446,6 +1508,19 @@ static const struct pmic_wrapper_type pwrap_mt8173 = {
> .init_soc_specific = pwrap_mt8173_init_soc_specific,
> };
>
> +static const struct pmic_wrapper_type pwrap_mt6797 = {
> + .regs = mt6797_regs,
> + .type = PWRAP_MT6797,
> + .arb_en_all = 0x01fff,
> + .int_en_all = 0xffffffc6,
> + .int1_en_all = 0x0001ffff,
> + .spi_w = PWRAP_MAN_CMD_SPI_WRITE,
> + .wdt_src = PWRAP_WDT_SRC_MASK_ALL,
> + .caps = PWRAP_CAP_DCM | PWRAP_CAP_INT1_EN,
> + .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",
> @@ -1460,6 +1535,9 @@ static const struct of_device_id of_pwrap_match_tbl[] = {
> .compatible = "mediatek,mt8173-pwrap",
> .data = &pwrap_mt8173,
> }, {
> + .compatible = "mediatek,mt6797-pwrap",
> + .data = &pwrap_mt6797,
> + }, {
> /* sentinel */
> }
> };
> @@ -1503,11 +1581,13 @@ static int pwrap_probe(struct platform_device *pdev)
> if (IS_ERR(wrp->base))
> return PTR_ERR(wrp->base);
>
> - wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
> - if (IS_ERR(wrp->rstc)) {
> - ret = PTR_ERR(wrp->rstc);
> - dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
> - return ret;
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_RESET)) {
> + wrp->rstc = devm_reset_control_get(wrp->dev, "pwrap");
> + if (IS_ERR(wrp->rstc)) {
> + ret = PTR_ERR(wrp->rstc);
> + dev_dbg(wrp->dev, "cannot get pwrap reset: %d\n", ret);
> + return ret;
> + }
This goes into 2/8.
> }
>
> if (HAS_CAP(wrp->master->caps, PWRAP_CAP_BRIDGE)) {
> @@ -1549,9 +1629,17 @@ static int pwrap_probe(struct platform_device *pdev)
> if (ret)
> goto err_out1;
>
> - /* Enable internal dynamic clock */
> - pwrap_writel(wrp, 1, PWRAP_DCM_EN);
> - pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
> + /*
> + * add dcm capability check
> + */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_DCM)) {
Into 2/8 please.
> + if (wrp->master->type == PWRAP_MT6797)
> + pwrap_writel(wrp, 3, PWRAP_DCM_EN);
> + else
> + pwrap_writel(wrp, 1, PWRAP_DCM_EN);
The if statement is ok here, but it should change the if of the caps check
introduced in 2/8. Does this make sense?
> +
> + pwrap_writel(wrp, 0, PWRAP_DCM_DBC_PRD);
> + }
Into 2/8 please.
>
> /*
> * The PMIC could already be initialized by the bootloader.
> @@ -1580,6 +1668,12 @@ static int pwrap_probe(struct platform_device *pdev)
> pwrap_writel(wrp, wrp->master->wdt_src, PWRAP_WDT_SRC_EN);
> pwrap_writel(wrp, 0x1, PWRAP_TIMER_EN);
> pwrap_writel(wrp, wrp->master->int_en_all, PWRAP_INT_EN);
> + /*
> + * We add INT1 interrupt to handle starvation and request exception
> + * If we support it, we should enable them here.
> + */
> + if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN))
> + pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
Into 4/8 please.
Best regards,
Matthias
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