From: Niklas Cassel <cassel@kernel.org>
To: "Jingoo Han" <jingoohan1@gmail.com>,
"Manivannan Sadhasivam" <manivannan.sadhasivam@linaro.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Lorenzo Pieralisi" <lpieralisi@kernel.org>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Rob Herring" <robh@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Heiko Stuebner" <heiko@sntech.de>,
"Niklas Cassel" <cassel@kernel.org>,
"Kishon Vijay Abraham I" <kishon@kernel.org>,
"Arnd Bergmann" <arnd@arndb.de>,
"Damien Le Moal" <dlemoal@kernel.org>,
"Jon Lin" <jon.lin@rock-chips.com>,
"Shawn Lin" <shawn.lin@rock-chips.com>,
"Simon Xue" <xxm@rock-chips.com>
Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org,
linux-rockchip@lists.infradead.org
Subject: [PATCH v3 08/13] PCI: dw-rockchip: Add rockchip_pcie_get_ltssm() helper
Date: Wed, 08 May 2024 15:13:39 +0200 [thread overview]
Message-ID: <20240508-rockchip-pcie-ep-v1-v3-8-1748e202b084@kernel.org> (raw)
In-Reply-To: <20240508-rockchip-pcie-ep-v1-v3-0-1748e202b084@kernel.org>
Add a rockchip_pcie_ltssm() helper function that reads the LTSSM status.
This helper will be used in additional places in follow-up commits.
Signed-off-by: Niklas Cassel <cassel@kernel.org>
---
drivers/pci/controller/dwc/pcie-dw-rockchip.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/pci/controller/dwc/pcie-dw-rockchip.c b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
index 1993c430b90c..2a70326cc0bc 100644
--- a/drivers/pci/controller/dwc/pcie-dw-rockchip.c
+++ b/drivers/pci/controller/dwc/pcie-dw-rockchip.c
@@ -143,6 +143,11 @@ static int rockchip_pcie_init_irq_domain(struct rockchip_pcie *rockchip)
return 0;
}
+static u32 rockchip_pcie_get_ltssm(struct rockchip_pcie *rockchip)
+{
+ return rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);
+}
+
static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip)
{
rockchip_pcie_writel_apb(rockchip, PCIE_CLIENT_ENABLE_LTSSM,
@@ -152,7 +157,7 @@ static void rockchip_pcie_enable_ltssm(struct rockchip_pcie *rockchip)
static int rockchip_pcie_link_up(struct dw_pcie *pci)
{
struct rockchip_pcie *rockchip = to_rockchip_pcie(pci);
- u32 val = rockchip_pcie_readl_apb(rockchip, PCIE_CLIENT_LTSSM_STATUS);
+ u32 val = rockchip_pcie_get_ltssm(rockchip);
if ((val & PCIE_LINKUP) == PCIE_LINKUP &&
(val & PCIE_LTSSM_STATUS_MASK) == PCIE_L0S_ENTRY)
--
2.44.0
next prev parent reply other threads:[~2024-05-08 13:14 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-08 13:13 [PATCH v3 00/13] PCI: dw-rockchip: Add endpoint mode support Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 01/13] dt-bindings: PCI: snps,dw-pcie-ep: Add vendor specific reg-name Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 02/13] dt-bindings: PCI: snps,dw-pcie-ep: Add vendor specific interrupt-names Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 03/13] dt-bindings: PCI: snps,dw-pcie-ep: Add tx_int{a,b,c,d} legacy irqs Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 04/13] dt-bindings: PCI: rockchip-dw-pcie: Prepare for Endpoint mode support Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 05/13] dt-bindings: PCI: rockchip-dw-pcie: Fix description of legacy irq Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 06/13] dt-bindings: rockchip: Add DesignWare based PCIe Endpoint controller Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 07/13] PCI: dw-rockchip: Fix weird indentation Niklas Cassel
2024-05-08 13:13 ` Niklas Cassel [this message]
2024-05-08 13:13 ` [PATCH v3 09/13] PCI: dw-rockchip: Refactor the driver to prepare for EP mode Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 10/13] PCI: dw-rockchip: Add endpoint mode support Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 11/13] misc: pci_endpoint_test: Add support for rockchip rk3588 Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 12/13] arm64: dts: rockchip: Add PCIe endpoint mode support Niklas Cassel
2024-05-08 13:13 ` [PATCH v3 13/13] arm64: dts: rockchip: Add rock5b overlays for PCIe endpoint mode Niklas Cassel
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