From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
To: unlisted-recipients:; (no To-header on input)
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
Binghui Wang <wangbinghui@hisilicon.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Mark Brown <broonie@kernel.org>, Rob Herring <robh@kernel.org>,
Xiaowei Song <songxiaowei@hisilicon.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: [PATCH 09/13] pci: dwc: pcie-kirin: allow to optionally require a regulator
Date: Tue, 2 Feb 2021 14:29:54 +0100 [thread overview]
Message-ID: <7f4abd1ba9f4b33fe6f66213f56aa4269db74317.1612271903.git.mchehab+huawei@kernel.org> (raw)
In-Reply-To: <cover.1612271903.git.mchehab+huawei@kernel.org>
On Hikey 970, there's a power supply controlled by Hi6421v600
regulator that turns on the PCI devices on the board. Without
that, no PCI hardware would work.
As this is device-dependent, such regulator line should be
optional.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
drivers/pci/controller/dwc/pcie-kirin.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index 2bce6e3750d4..42aea34dff4d 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -22,6 +22,7 @@
#include <linux/pci_regs.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include <linux/resource.h>
#include <linux/types.h>
#include "pcie-designware.h"
@@ -295,6 +296,22 @@ static void kirin970_pcie_set_eyeparam(struct kirin_pcie *kirin_pcie)
static long kirin_common_pcie_get_resource(struct kirin_pcie *kirin_pcie,
struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
+ struct regulator *reg;
+ int ret;
+
+ reg = devm_regulator_get_optional(dev, "pci");
+ if (IS_ERR_OR_NULL(reg)) {
+ if (PTR_ERR(reg) == -EPROBE_DEFER)
+ return PTR_ERR(reg);
+ } else {
+ ret = regulator_enable(reg);
+ if (ret) {
+ dev_err(dev, "Failed to enable regulator\n");
+ return ret;
+ }
+ }
+
kirin_pcie->apb_base = devm_platform_ioremap_resource_byname(pdev,
"apb");
if (IS_ERR(kirin_pcie->apb_base))
--
2.29.2
next prev parent reply other threads:[~2021-02-02 13:31 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 13:29 [PATCH 00/13] Add support for Hikey 970 PCIe Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 01/13] doc: bindings: pci: designware-pcie.txt: convert it to yaml Mauro Carvalho Chehab
2021-02-02 17:44 ` Rob Herring
2021-02-03 6:49 ` Mauro Carvalho Chehab
2021-02-04 17:29 ` Rob Herring
2021-02-04 18:29 ` Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 02/13] doc: bindings: kirin-pcie.txt: " Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 03/13] doc: bindings: add new parameters used by Hikey 970 Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 04/13] pci: dwc: pcie-kirin: add HI3670 PCI-E controller support Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 05/13] arm64: dts: hisilicon: Add " Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 06/13] pci: dwc: pcie-kirin: simplify error handling logic Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 07/13] pci: dwc: pcie-kirin: simplify kirin 970 get resource logic Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 08/13] pci: dwc: pcie-kirin: place common init code altogether Mauro Carvalho Chehab
2021-02-02 13:29 ` Mauro Carvalho Chehab [this message]
2021-02-02 13:41 ` [PATCH 09/13] pci: dwc: pcie-kirin: allow to optionally require a regulator Mark Brown
2021-02-02 14:50 ` Mauro Carvalho Chehab
2021-02-02 16:02 ` Mark Brown
2021-02-02 13:29 ` [PATCH 10/13] pci: dwc: pcie-kirin: allow using multiple reset GPIOs Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 11/13] pci: dwc: pcie-kirin: add support for clkreq GPIOs Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 12/13] pci: dwc: pcie-kirin: cleanup kirin970_pcie_get_eyeparam() Mauro Carvalho Chehab
2021-02-02 13:29 ` [PATCH 13/13] arm64: dts: hisilicon: cleanup Hikey 970 PCI schema Mauro Carvalho Chehab
2021-02-02 14:48 ` [PATCH 00/13] Add support for Hikey 970 PCIe Bjorn Helgaas
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