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authorShawn Lin <shawn.lin@rock-chips.com>2017-06-29 09:22:23 +0800
committerBjorn Helgaas <bhelgaas@google.com>2017-08-16 11:43:59 -0500
commitb6502e0dcf7077bd05664ddfc7e30cce49bc0b0d (patch)
treeccce89ecee3e46da7cc420633133ce2e7127a2ea /drivers/pci/host
parent828bdcfbdb98eeb97facb05fe6c96ba0aed65c4a (diff)
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/host')
-rw-r--r--drivers/pci/host/pcie-rockchip.c25
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))