From: Jim Quinlan <james.quinlan@broadcom•com>
To: james.quinlan@broadcom•com,
Nicolas Saenz Julienne <nsaenzjulienne@suse•de>
Cc: Rob Herring <robh@kernel•org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm•com>,
"open list:PCI NATIVE HOST BRIDGE AND ENDPOINT DRIVERS"
<linux-pci@vger•kernel.org>,
open list <linux-kernel@vger•kernel.org>,
Florian Fainelli <f.fainelli@gmail•com>,
"maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE"
<bcm-kernel-feedback-list@broadcom•com>,
"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
<linux-rpi-kernel@lists•infradead.org>,
Jim Quinlan <james.quinlan@broadcom•com>,
Bjorn Helgaas <bhelgaas@google•com>,
"moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE"
<linux-arm-kernel@lists•infradead.org>
Subject: [PATCH 05/15] PCI: brcmstb: Add suspend and resume pm_ops
Date: Tue, 19 May 2020 16:34:03 -0400 [thread overview]
Message-ID: <20200519203419.12369-6-james.quinlan@broadcom.com> (raw)
In-Reply-To: <20200519203419.12369-1-james.quinlan@broadcom.com>
From: Jim Quinlan <jquinlan@broadcom•com>
Broadcom Set-top (BrcmSTB) boards typically support S2, S3,
and S5 suspend and resume. This commit enables the PCIe
driver to do so.
Signed-off-by: Jim Quinlan <jquinlan@broadcom•com>
---
drivers/pci/controller/pcie-brcmstb.c | 49 +++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index c1cf4ea7d3d9..39993203b991 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -972,6 +972,49 @@ static void brcm_pcie_turn_off(struct brcm_pcie *pcie)
brcm_pcie_bridge_sw_init_set(pcie, 1);
}
+static int brcm_pcie_suspend(struct device *dev)
+{
+ struct brcm_pcie *pcie = dev_get_drvdata(dev);
+ int ret = 0;
+
+ brcm_pcie_turn_off(pcie);
+ clk_disable_unprepare(pcie->clk);
+
+ return ret;
+}
+
+static int brcm_pcie_resume(struct device *dev)
+{
+ struct brcm_pcie *pcie = dev_get_drvdata(dev);
+ void __iomem *base;
+ u32 tmp;
+ int ret;
+
+ base = pcie->base;
+ clk_prepare_enable(pcie->clk);
+
+ /* Take bridge out of reset so we can access the SERDES reg */
+ brcm_pcie_bridge_sw_init_set(pcie, 0);
+
+ /* SERDES_IDDQ = 0 */
+ tmp = readl(base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+ u32p_replace_bits(&tmp, 0,
+ PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK);
+ writel(tmp, base + PCIE_MISC_HARD_PCIE_HARD_DEBUG);
+
+ /* wait for serdes to be stable */
+ udelay(100);
+
+ ret = brcm_pcie_setup(pcie);
+ if (ret)
+ return ret;
+
+ if (pcie->msi)
+ brcm_msi_set_regs(pcie->msi);
+
+ return 0;
+}
+
static void __brcm_pcie_remove(struct brcm_pcie *pcie)
{
brcm_msi_remove(pcie);
@@ -1090,12 +1133,18 @@ static int brcm_pcie_probe(struct platform_device *pdev)
MODULE_DEVICE_TABLE(of, brcm_pcie_match);
+static const struct dev_pm_ops brcm_pcie_pm_ops = {
+ .suspend_noirq = brcm_pcie_suspend,
+ .resume_noirq = brcm_pcie_resume,
+};
+
static struct platform_driver brcm_pcie_driver = {
.probe = brcm_pcie_probe,
.remove = brcm_pcie_remove,
.driver = {
.name = "brcm-pcie",
.of_match_table = brcm_pcie_match,
+ .pm = &brcm_pcie_pm_ops,
},
};
module_platform_driver(brcm_pcie_driver);
--
2.17.1
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next prev parent reply other threads:[~2020-05-19 20:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 20:33 [PATCH 00/15] PCI: brcmstb: enable PCIe for STB chips Jim Quinlan
2020-05-19 20:34 ` [PATCH 03/15] dt-bindings: PCI: Add bindings for more Brcmstb chips Jim Quinlan
2020-05-19 20:34 ` [PATCH 04/15] PCI: brcmstb: Add compatibily of other chips Jim Quinlan
2020-05-20 11:51 ` Nicolas Saenz Julienne
2020-05-20 14:30 ` Jim Quinlan
2020-05-20 14:41 ` Nicolas Saenz Julienne
2020-05-21 19:35 ` Jim Quinlan
2020-05-22 9:17 ` Nicolas Saenz Julienne
2020-05-19 20:34 ` Jim Quinlan [this message]
2020-05-19 20:34 ` [PATCH 06/15] PCI: brcmstb: Asserting PERST is different for 7278 Jim Quinlan
2020-05-19 20:34 ` [PATCH 07/15] PCI: brcmstb: Add control of rescal reset Jim Quinlan
2020-05-20 7:27 ` Philipp Zabel
2020-05-21 21:48 ` Jim Quinlan
2020-05-25 16:58 ` Florian Fainelli
2020-05-19 20:34 ` [PATCH 11/15] arm: dma-mapping: Invoke dma offset func if needed Jim Quinlan
2020-05-19 20:34 ` [PATCH 12/15] PCI: brcmstb: Set internal memory viewport sizes Jim Quinlan
2020-05-19 20:34 ` [PATCH 13/15] PCI: brcmstb: Accommodate MSI for older chips Jim Quinlan
2020-05-19 20:34 ` [PATCH 14/15] PCI: brcmstb: Set bus max burst side by chip type Jim Quinlan
2020-05-20 13:44 ` Nicolas Saenz Julienne
2020-05-20 14:27 ` Jim Quinlan
2020-05-19 20:34 ` [PATCH 15/15] PCI: brcmstb: add compatilbe chips to match list Jim Quinlan
2020-05-20 16:15 ` [PATCH 00/15] PCI: brcmstb: enable PCIe for STB chips Bjorn Helgaas
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