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Merge branch 'remotes/lorenzo/pci/mediatek-gen3'

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- Disable Mediatek DVFSRC voltage request since lack of DVFSRC to respond
  to the request causes failure to exit L1 PM Substate (Jianjun Wang)

* remotes/lorenzo/pci/mediatek-gen3:
  PCI: mediatek-gen3: Disable DVFSRC voltage request
This commit is contained in:
Bjorn Helgaas 2022-01-13 09:57:48 -06:00
commit 96fe579384
1 changed files with 8 additions and 0 deletions
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8
drivers/pci/controller/pcie-mediatek-gen3.c
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@ -79,6 +79,9 @@
#define PCIE_ICMD_PM_REG 0x198
#define PCIE_TURN_OFF_LINK BIT(4)
#define PCIE_MISC_CTRL_REG 0x348
#define PCIE_DISABLE_DVFSRC_VLT_REQ BIT(1)
#define PCIE_TRANS_TABLE_BASE_REG 0x800
#define PCIE_ATR_SRC_ADDR_MSB_OFFSET 0x4
#define PCIE_ATR_TRSL_ADDR_LSB_OFFSET 0x8
@ -297,6 +300,11 @@ static int mtk_pcie_startup_port(struct mtk_pcie_port *port)
val &= ~PCIE_INTX_ENABLE;
writel_relaxed(val, port->base + PCIE_INT_ENABLE_REG);
/* Disable DVFSRC voltage request */
val = readl_relaxed(port->base + PCIE_MISC_CTRL_REG);
val |= PCIE_DISABLE_DVFSRC_VLT_REQ;
writel_relaxed(val, port->base + PCIE_MISC_CTRL_REG);
/* Assert all reset signals */
val = readl_relaxed(port->base + PCIE_RST_CTRL_REG);
val |= PCIE_MAC_RSTB | PCIE_PHY_RSTB | PCIE_BRG_RSTB | PCIE_PE_RSTB;