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From d5a3dee65f4ee9d320128bbf79df80d51aec7687 Mon Sep 17 00:00:00 2001
From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Date: Mon, 24 Jul 2017 20:22:03 +0300
Subject: [PATCH] pci: pcie-rcar: add regulators support
Add PCIE regulators
Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
---
drivers/pci/host/pcie-rcar.c | 54 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/drivers/pci/host/pcie-rcar.c b/drivers/pci/host/pcie-rcar.c
index 8e24d5f88415..6994ea2ac936 100644
--- a/drivers/pci/host/pcie-rcar.c
+++ b/drivers/pci/host/pcie-rcar.c
@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
@@ -155,6 +156,8 @@ struct rcar_pcie {
int root_bus_nr;
struct clk *clk;
struct clk *bus_clk;
+ struct regulator *pcie3v3; /* 3.3V power supply */
+ struct regulator *pcie1v8; /* 1.8V power supply */
struct rcar_msi msi;
};
@@ -1193,6 +1196,36 @@ static int rcar_pcie_parse_request_of_pci_ranges(struct rcar_pcie *pci)
return err;
}
+static int rcar_pcie_set_vpcie(struct rcar_pcie *pcie)
+{
+ struct device *dev = pcie->dev;
+ int err;
+
+ if (!IS_ERR(pcie->pcie3v3)) {
+ err = regulator_enable(pcie->pcie3v3);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie3v3 regulator\n");
+ goto err_out;
+ }
+ }
+
+ if (!IS_ERR(pcie->pcie1v8)) {
+ err = regulator_enable(pcie->pcie1v8);
+ if (err) {
+ dev_err(dev, "fail to enable vpcie1v8 regulator\n");
+ goto err_disable_3v3;
+ }
+ }
+
+ return 0;
+
+err_disable_3v3:
+ if (!IS_ERR(pcie->pcie3v3))
+ regulator_disable(pcie->pcie3v3);
+err_out:
+ return err;
+}
+
static int rcar_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1209,6 +1242,26 @@ static int rcar_pcie_probe(struct platform_device *pdev)
pcie->dev = dev;
platform_set_drvdata(pdev, pcie);
+ pcie->pcie3v3 = devm_regulator_get_optional(dev, "pcie3v3");
+ if (IS_ERR(pcie->pcie3v3)) {
+ if (PTR_ERR(pcie->pcie3v3) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no pcie3v3 regulator found\n");
+ }
+
+ pcie->pcie1v8 = devm_regulator_get_optional(dev, "pcie1v8");
+ if (IS_ERR(pcie->pcie1v8)) {
+ if (PTR_ERR(pcie->pcie1v8) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_info(dev, "no pcie1v8 regulator found\n");
+ }
+
+ err = rcar_pcie_set_vpcie(pcie);
+ if (err) {
+ dev_err(dev, "failed to set pcie regulators\n");
+ goto err_set_pcie;
+ }
+
INIT_LIST_HEAD(&pcie->resources);
rcar_pcie_parse_request_of_pci_ranges(pcie);
@@ -1267,6 +1320,7 @@ static int rcar_pcie_probe(struct platform_device *pdev)
err_pm_disable:
pm_runtime_disable(dev);
+err_set_pcie:
return err;
}
--
2.13.0
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