linux-kernel - Re: [PATCHv3 14/27] PCI: mobiveil: initialize Primary/Secondary/Subordinate bus number

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Message-ID: <CAFZiPx3qPHWfyz8R1xhsvZyS40WdyWGCZzSd8xgcQ3q+H9WCYQ@mail.gmail.com>
Date:   Fri, 8 Feb 2019 18:01:48 +0530
From:   Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>
To:     "Z.q. Hou" <zhiqiang.hou@....com>
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        Leo Li <leoyang.li@....com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "catalin.marinas@....com" <catalin.marinas@....com>,
        "will.deacon@....com" <will.deacon@....com>,
        Mingkai Hu <mingkai.hu@....com>,
        "M.h. Lian" <minghuan.lian@....com>,
        Xiaowei Bao <xiaowei.bao@....com>
Subject: Re: [PATCHv3 14/27] PCI: mobiveil: initialize Primary/Secondary/Subordinate
 bus number

On Tue, Jan 29, 2019 at 1:40 PM Z.q. Hou <zhiqiang.hou@....com> wrote:
>
> From: Hou Zhiqiang <Zhiqiang.Hou@....com>
>
> The reset value is all zero, so set a workable value for Primary,
> Secondary and Subordinate bus numbers.
>
> Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@....com>
> Reviewed-by: Minghuan Lian <Minghuan.Lian@....com>
> ---
> V3:
>  - No change
>
>  drivers/pci/controller/pcie-mobiveil.c | 6 ++++++
>  1 file changed, 6 insertions(+)
>
> diff --git a/drivers/pci/controller/pcie-mobiveil.c b/drivers/pci/controller/pcie-mobiveil.c
> index db7ecb021c63..9210165fe8c0 100644
> --- a/drivers/pci/controller/pcie-mobiveil.c
> +++ b/drivers/pci/controller/pcie-mobiveil.c
> @@ -582,6 +582,12 @@ static int mobiveil_host_init(struct mobiveil_pcie *pcie)
>         u32 value, pab_ctrl, type;
>         struct resource_entry *win;
>
> +       /* setup bus numbers */
> +       value = csr_readl(pcie, PCI_PRIMARY_BUS);
> +       value &= 0xff000000;
> +       value |= 0x00ff0100;
> +       csr_writel(pcie, value, PCI_PRIMARY_BUS);
> +
>         /*
>          * program Bus Master Enable Bit in Command Register in PAB Config
>          * Space
> --
> 2.17.1
>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@...iveil.co.in>