diff options
| author | Shawn Lin | 2017-06-29 03:22:23 +0200 |
|---|---|---|
| committer | Bjorn Helgaas | 2017-08-16 18:43:59 +0200 |
| commit | b6502e0dcf7077bd05664ddfc7e30cce49bc0b0d (patch) | |
| tree | ccce89ecee3e46da7cc420633133ce2e7127a2ea /drivers/pci | |
| parent | dt-bindings: PCI: rockchip: Add vpcie12v-supply for Rockchip PCIe controller (diff) | |
| download | kernel-qcow2-linux-b6502e0dcf7077bd05664ddfc7e30cce49bc0b0d.tar.gz kernel-qcow2-linux-b6502e0dcf7077bd05664ddfc7e30cce49bc0b0d.tar.xz kernel-qcow2-linux-b6502e0dcf7077bd05664ddfc7e30cce49bc0b0d.zip | |
PCI: rockchip: Control optional 12v power supply
Get vpcie12v from DT and control it if available.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/host/pcie-rockchip.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c index 7bb9870f6d8c..80b9a8814768 100644 --- a/drivers/pci/host/pcie-rockchip.c +++ b/drivers/pci/host/pcie-rockchip.c @@ -222,6 +222,7 @@ struct rockchip_pcie { struct clk *aclk_perf_pcie; struct clk *hclk_pcie; struct clk *clk_pcie_pm; + struct regulator *vpcie12v; /* 12V power supply */ struct regulator *vpcie3v3; /* 3.3V power supply */ struct regulator *vpcie1v8; /* 1.8V power supply */ struct regulator *vpcie0v9; /* 0.9V power supply */ @@ -1018,6 +1019,13 @@ static int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip) return err; } + rockchip->vpcie12v = devm_regulator_get_optional(dev, "vpcie12v"); + if (IS_ERR(rockchip->vpcie12v)) { + if (PTR_ERR(rockchip->vpcie12v) == -EPROBE_DEFER) + return -EPROBE_DEFER; + dev_info(dev, "no vpcie12v regulator found\n"); + } + rockchip->vpcie3v3 = devm_regulator_get_optional(dev, "vpcie3v3"); if (IS_ERR(rockchip->vpcie3v3)) { if (PTR_ERR(rockchip->vpcie3v3) == -EPROBE_DEFER) @@ -1047,11 +1055,19 @@ static int rockchip_pcie_set_vpcie(struct rockchip_pcie *rockchip) struct device *dev = rockchip->dev; int err; + if (!IS_ERR(rockchip->vpcie12v)) { + err = regulator_enable(rockchip->vpcie12v); + if (err) { + dev_err(dev, "fail to enable vpcie12v regulator\n"); + goto err_out; + } + } + if (!IS_ERR(rockchip->vpcie3v3)) { err = regulator_enable(rockchip->vpcie3v3); if (err) { dev_err(dev, "fail to enable vpcie3v3 regulator\n"); - goto err_out; + goto err_disable_12v; } } @@ -1079,6 +1095,9 @@ err_disable_1v8: err_disable_3v3: if (!IS_ERR(rockchip->vpcie3v3)) regulator_disable(rockchip->vpcie3v3); +err_disable_12v: + if (!IS_ERR(rockchip->vpcie12v)) + regulator_disable(rockchip->vpcie12v); err_out: return err; } @@ -1501,6 +1520,8 @@ static int rockchip_pcie_probe(struct platform_device *pdev) err_free_res: pci_free_resource_list(&res); err_vpcie: + if (!IS_ERR(rockchip->vpcie12v)) + regulator_disable(rockchip->vpcie12v); if (!IS_ERR(rockchip->vpcie3v3)) regulator_disable(rockchip->vpcie3v3); if (!IS_ERR(rockchip->vpcie1v8)) @@ -1537,6 +1558,8 @@ static int rockchip_pcie_remove(struct platform_device *pdev) clk_disable_unprepare(rockchip->aclk_perf_pcie); clk_disable_unprepare(rockchip->aclk_pcie); + if (!IS_ERR(rockchip->vpcie12v)) + regulator_disable(rockchip->vpcie12v); if (!IS_ERR(rockchip->vpcie3v3)) regulator_disable(rockchip->vpcie3v3); if (!IS_ERR(rockchip->vpcie1v8)) |