From: Shawn Guo <shawnguo@kernel.org>
To: Leonard Crestez <leonard.crestez@nxp.com>
Cc: Lucas Stach <l.stach@pengutronix.de>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Fabio Estevam <fabio.estevam@nxp.com>,
Stefan Agner <stefan@agner.ch>, Marek Vasut <marex@denx.de>,
Ulf Hansson <ulf.hansson@linaro.org>,
dri-devel@lists.freedesktop.org, linux-pci@vger.kernel.org,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-imx@nxp.com, kernel@pengutronix.de
Subject: Re: [PATCH 2/3] PCI: imx: Add multi-pd support
Date: Mon, 8 Oct 2018 11:26:59 +0800 [thread overview]
Message-ID: <20181008032657.GF3587@dragon> (raw)
In-Reply-To: <5832128f3b1822839a0f0bbd1cf8313cf586f15f.1538426534.git.leonard.crestez@nxp.com>
On Mon, Oct 01, 2018 at 11:56:17PM +0300, Leonard Crestez wrote:
> On some chips the PCIE and PCIE_PHY blocks are in separate power domains
> which can be power-gated independently. The driver needs to handle this
> by keeping both domain active.
>
> This is intended for imx6sx where PCIE is in DISPMIX and PCIE_PHY in
> it's own domain. Defining the DISPMIX domain requires a way for pcie to
> keep it active or it will break when displays are off.
>
> The power-domains on imx6sx are meant to look like this:
> power-domains = <&pd_disp>, <&pd_pci>;
> power-domain-names = "pcie", "pcie_phy";
>
> Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
>
> ---
> drivers/pci/controller/dwc/pci-imx6.c | 48 +++++++++++++++++++++++++++
> 1 file changed, 48 insertions(+)
Bindings document fsl,imx6q-pcie.txt should probably be updated for the
new power domain support.
Shawn
next prev parent reply other threads:[~2018-10-08 3:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-01 20:56 [PATCH 0/3] ARM: dts: imx6sx: Add DISPLAY power domain support Leonard Crestez
2018-10-01 20:56 ` [PATCH 1/3] soc: imx: gpc: Increase GPC_CLK_MAX to 7 Leonard Crestez
2018-10-01 20:56 ` [PATCH 2/3] PCI: imx: Add multi-pd support Leonard Crestez
2018-10-08 3:26 ` Shawn Guo [this message]
2018-10-01 20:56 ` [PATCH 3/3] ARM: dts: imx6sx: Add DISPLAY power domain support Leonard Crestez
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