RE: [EXT] Re: [PATCH v2 3/3] PCI: imx: clear vreg bypass when pcie vph voltage is 3v3

2021-03-24 Thread Richard Zhu
nel.org; dl-linux-imx ; > linux-arm-ker...@lists.infradead.org; linux-kernel@vger.kernel.org; > ker...@pengutronix.de > Subject: Re: [PATCH v2 3/3] PCI: imx: clear vreg bypass when pcie vph > voltage is 3v3 > Am Mittwoch, dem 24.03.2021 um 13:34 +0800 schrieb Richard Zhu: > > Both 1

Re: [PATCH v2 3/3] PCI: imx: clear vreg bypass when pcie vph voltage is 3v3

2021-03-24 Thread Lucas Stach
Am Mittwoch, dem 24.03.2021 um 13:34 +0800 schrieb Richard Zhu: > Both 1.8v and 3.3v power supplies can be used by i.MX8MQ PCIe PHY. > In default, the PCIE_VPH voltage is suggested to be 1.8v refer to data > sheet. When PCIE_VPH is supplied by 3.3v in the HW schematic design, > the VREG_BYPASS bits

[PATCH v2 3/3] PCI: imx: clear vreg bypass when pcie vph voltage is 3v3

2021-03-23 Thread Richard Zhu
Both 1.8v and 3.3v power supplies can be used by i.MX8MQ PCIe PHY. In default, the PCIE_VPH voltage is suggested to be 1.8v refer to data sheet. When PCIE_VPH is supplied by 3.3v in the HW schematic design, the VREG_BYPASS bits of GPR registers should be cleared from default value 1b'1 to 1b'0. Thu