[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1698767186-5046-3-git-send-email-quic_msarkar@quicinc.com>
Date: Tue, 31 Oct 2023 21:16:25 +0530
From: Mrinmay Sarkar <quic_msarkar@...cinc.com>
To: agross@...nel.org, andersson@...nel.org,
krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
konrad.dybcio@...aro.org, mani@...nel.org, robh+dt@...nel.org
Cc: quic_shazhuss@...cinc.com, quic_nitegupt@...cinc.com,
quic_ramkri@...cinc.com, quic_nayiluri@...cinc.com,
dmitry.baryshkov@...aro.org, robh@...nel.org,
quic_krichai@...cinc.com, quic_vbadigan@...cinc.com,
quic_parass@...cinc.com, quic_schintav@...cinc.com,
quic_shijjose@...cinc.com,
Mrinmay Sarkar <quic_msarkar@...cinc.com>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Krzysztof WilczyĆski <kw@...ux.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: [PATCH v1 2/3] PCI: qcom-ep: Enable cache coherency for SA8775P EP
This change will enable cache snooping logic to support
cache coherency for SA8755P EP platform.
Signed-off-by: Mrinmay Sarkar <quic_msarkar@...cinc.com>
---
drivers/pci/controller/dwc/pcie-qcom-ep.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c
index 3a53d97..bc958a0 100644
--- a/drivers/pci/controller/dwc/pcie-qcom-ep.c
+++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c
@@ -47,6 +47,7 @@
#define PARF_DBI_BASE_ADDR_HI 0x354
#define PARF_SLV_ADDR_SPACE_SIZE 0x358
#define PARF_SLV_ADDR_SPACE_SIZE_HI 0x35c
+#define PCIE_PARF_NO_SNOOP_OVERIDE 0x3d4
#define PARF_ATU_BASE_ADDR 0x634
#define PARF_ATU_BASE_ADDR_HI 0x638
#define PARF_SRIS_MODE 0x644
@@ -86,6 +87,9 @@
#define PARF_DEBUG_INT_CFG_BUS_MASTER_EN BIT(2)
#define PARF_DEBUG_INT_RADM_PM_TURNOFF BIT(3)
+/* PARF_NO_SNOOP_OVERIDE register value */
+#define NO_SNOOP_OVERIDE_EN 0xa
+
/* PARF_DEVICE_TYPE register fields */
#define PARF_DEVICE_TYPE_EP 0x0
@@ -489,6 +493,10 @@ static int qcom_pcie_perst_deassert(struct dw_pcie *pci)
val |= BIT(8);
writel_relaxed(val, pcie_ep->parf + PARF_LTSSM);
+ /* Enable cache snooping for SA8775P */
+ if (of_device_is_compatible(dev->of_node, "qcom,sa8775p-pcie-ep"))
+ writel_relaxed(NO_SNOOP_OVERIDE_EN, pcie_ep->parf + PCIE_PARF_NO_SNOOP_OVERIDE);
+
return 0;
err_disable_resources:
--
2.7.4
Powered by blists - more mailing lists