linux-kernel - Re: [PATCH v7 08/10] arm64: dts: HiSilicon: Add support for HiKey 970 PCIe controller hardware

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Message-ID: <20210723085318.243f155f@coco.lan>
Date:   Fri, 23 Jul 2021 08:53:18 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Vinod Koul <vkoul@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh@...nel.org>, linuxarm@...wei.com,
        mauro.chehab@...wei.com,
        Krzysztof Wilczyński <kw@...ux.com>,
        Binghui Wang <wangbinghui@...ilicon.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh+dt@...nel.org>,
        Wei Xu <xuwei5@...ilicon.com>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH v7 08/10] arm64: dts: HiSilicon: Add support for HiKey
 970 PCIe controller hardware

Em Thu, 22 Jul 2021 19:06:28 +0530
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org> escreveu:

> On Wed, Jul 21, 2021 at 10:39:10AM +0200, Mauro Carvalho Chehab wrote:
> > From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > 
> > Add DTS bindings for the HiKey 970 board's PCIe hardware.
> > 
> > Co-developed-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
> > ---
> >  arch/arm64/boot/dts/hisilicon/hi3670.dtsi     | 71 +++++++++++++++++++
> >  .../boot/dts/hisilicon/hikey970-pmic.dtsi     |  1 -
> >  drivers/pci/controller/dwc/pcie-kirin.c       | 12 ----
> >  3 files changed, 71 insertions(+), 13 deletions(-)
> > 
> > diff --git a/arch/arm64/boot/dts/hisilicon/hi3670.dtsi b/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
> > index 1f228612192c..6dfcfcfeedae 100644
> > --- a/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
> > +++ b/arch/arm64/boot/dts/hisilicon/hi3670.dtsi
> > @@ -177,6 +177,12 @@ sctrl: sctrl@...0a000 {
> >  			#clock-cells = <1>;
> >  		};
> >  
> > +		pmctrl: pmctrl@...31000 {
> > +			compatible = "hisilicon,hi3670-pmctrl", "syscon";
> > +			reg = <0x0 0xfff31000 0x0 0x1000>;
> > +			#clock-cells = <1>;
> > +		};
> > +  
> 
> Irrelevant change to this patch.

Huh?

This is used by PCIe PHY, as part of the power on procedures:

	+static int hi3670_pcie_noc_power(struct hi3670_pcie_phy *phy, bool enable)
	+{
	+       struct device *dev = phy->dev;
	+       u32 time = 100;
	+       unsigned int val = NOC_PW_MASK;
	+       int rst;
	+
	+       if (enable)
	+               val = NOC_PW_MASK | NOC_PW_SET_BIT;
	+       else
	+               val = NOC_PW_MASK;
	+       rst = enable ? 1 : 0;
	+
	+       regmap_write(phy->pmctrl, NOC_POWER_IDLEREQ_1, val);



> 
> >  		iomcu: iomcu@...7e000 {
> >  			compatible = "hisilicon,hi3670-iomcu", "syscon";
> >  			reg = <0x0 0xffd7e000 0x0 0x1000>;
> > @@ -660,6 +666,71 @@ gpio28: gpio@...1d000 {
> >  			clock-names = "apb_pclk";
> >  		};
> >    
> 
> [...]
> 
> > +			#interrupt-cells = <1>;
> > +			interrupts = <0 283 4>;  
> 
> Use the DT flag for interrupts instead of hardcoded value

Do you mean like this?

	interrupts = <0 283 IRQ_TYPE_LEVEL_HIGH>;

> 
> > +			interrupt-names = "msi";
> > +			interrupt-map-mask = <0 0 0 7>;
> > +			interrupt-map = <0x0 0 0 1
> > +					 &gic GIC_SPI 282 IRQ_TYPE_LEVEL_HIGH>,
> > +					<0x0 0 0 2
> > +					 &gic GIC_SPI 283 IRQ_TYPE_LEVEL_HIGH>,
> > +					<0x0 0 0 3
> > +					 &gic GIC_SPI 284 IRQ_TYPE_LEVEL_HIGH>,
> > +					<0x0 0 0 4
> > +					 &gic GIC_SPI 285 IRQ_TYPE_LEVEL_HIGH>;
> > +		};
> > +
> >  		/* UFS */
> >  		ufs: ufs@...c0000 {
> >  			compatible = "hisilicon,hi3670-ufs", "jedec,ufs-2.1";
> > diff --git a/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi b/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
> > index 48c739eacba0..03452e627641 100644
> > --- a/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
> > +++ b/arch/arm64/boot/dts/hisilicon/hikey970-pmic.dtsi
> > @@ -73,7 +73,6 @@ ldo33: LDO33 { /* PEX8606 */
> >  					regulator-name = "ldo33";
> >  					regulator-min-microvolt = <2500000>;
> >  					regulator-max-microvolt = <3300000>;
> > -					regulator-boot-on;  
> 
> Again, irrelevant.

I'll move it to the USB patch series, where the PMIC is added.

> 
> >  				};
> >  
> >  				ldo34: LDO34 { /* GPS AUX IN VDD */
> > diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
> > index bfc0513f7b15..9dad14929538 100644
> > --- a/drivers/pci/controller/dwc/pcie-kirin.c
> > +++ b/drivers/pci/controller/dwc/pcie-kirin.c
> > @@ -347,18 +347,6 @@ static const struct regmap_config pcie_kirin_regmap_conf = {
> >  	.reg_stride = 4,
> >  };
> >  
> > -/* Registers in PCIeCTRL */
> > -static inline void kirin_apb_ctrl_writel(struct kirin_pcie *kirin_pcie,
> > -					 u32 val, u32 reg)
> > -{
> > -	writel(val, kirin_pcie->apb_base + reg);
> > -}
> > -
> > -static inline u32 kirin_apb_ctrl_readl(struct kirin_pcie *kirin_pcie, u32 reg)
> > -{
> > -	return readl(kirin_pcie->apb_base + reg);
> > -}
> > -  
> 
> Same here...

This hunk should be on patch 03/10. Probably some rebase added it here by
mistake. I'll fix it on v8.

Thanks,
Mauro