linux-kernel - [PATCH v15 11/13] PCI: kirin: Disable clkreq during poweroff sequence

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Date:   Thu, 21 Oct 2021 11:45:18 +0100
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Binghui Wang <wangbinghui@...ilicon.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh@...nel.org>,
        Xiaowei Song <songxiaowei@...ilicon.com>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [PATCH v15 11/13] PCI: kirin: Disable clkreq during poweroff sequence

The logic at kirin_pcie_gpio_request() enables some clkreq
GPIO lines. Disable them during power-off.

Acked-by: Xiaowei Song <songxiaowei@...ilicon.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---

To mailbombing on a large number of people, only mailing lists were C/C on the cover.
See [PATCH v15 00/13] at: https://lore.kernel.org/all/cover.1634812676.git.mchehab+huawei@kernel.org/

 drivers/pci/controller/dwc/pcie-kirin.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index f4ea27b37968..4c3fa02b7108 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -687,6 +687,9 @@ static int kirin_pcie_power_off(struct kirin_pcie *kirin_pcie)
 	if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY)
 		return hi3660_pcie_phy_power_off(kirin_pcie);
 
+	for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++)
+		gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 1);
+
 	phy_power_off(kirin_pcie->phy);
 	phy_exit(kirin_pcie->phy);
 
-- 
2.31.1