linux-kernel - [PATCH 6/8] PCI: qcom: Use post init sequence of IP v2.3.2 for v2.4.0

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Message-Id: <20230506073139.8789-7-manivannan.sadhasivam@linaro.org>
Date:   Sat,  6 May 2023 13:01:37 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     lpieralisi@...nel.org, kw@...ux.com, bhelgaas@...gle.com
Cc:     robh@...nel.org, andersson@...nel.org, konrad.dybcio@...aro.org,
        linux-pci@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, steev@...i.org,
        quic_srichara@...cinc.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Subject: [PATCH 6/8] PCI: qcom: Use post init sequence of IP v2.3.2 for v2.4.0

The post init sequence of IP v2.4.0 is same as v2.3.2. So let's reuse the
v2.3.2 sequence which now also disables hotplug capability of the
controller as it is not at all supported on any SoCs making use of this IP.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 30 +-------------------------
 1 file changed, 1 insertion(+), 29 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 33353be396ec..0c5e825c6360 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -697,34 +697,6 @@ static int qcom_pcie_init_2_4_0(struct qcom_pcie *pcie)
 	return 0;
 }
 
-static int qcom_pcie_post_init_2_4_0(struct qcom_pcie *pcie)
-{
-	u32 val;
-
-	/* enable PCIe clocks and resets */
-	val = readl(pcie->parf + PARF_PHY_CTRL);
-	val &= ~PHY_TEST_PWR_DOWN;
-	writel(val, pcie->parf + PARF_PHY_CTRL);
-
-	/* change DBI base address */
-	writel(0, pcie->parf + PARF_DBI_BASE_ADDR);
-
-	/* MAC PHY_POWERDOWN MUX DISABLE  */
-	val = readl(pcie->parf + PARF_SYS_CTRL);
-	val &= ~MAC_PHY_POWERDOWN_IN_P2_D_MUX_EN;
-	writel(val, pcie->parf + PARF_SYS_CTRL);
-
-	val = readl(pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
-	val |= BYPASS;
-	writel(val, pcie->parf + PARF_MHI_CLOCK_RESET_CTRL);
-
-	val = readl(pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
-	val |= EN;
-	writel(val, pcie->parf + PARF_AXI_MSTR_WR_ADDR_HALT_V2);
-
-	return 0;
-}
-
 static int qcom_pcie_get_resources_2_3_3(struct qcom_pcie *pcie)
 {
 	struct qcom_pcie_resources_2_3_3 *res = &pcie->res.v2_3_3;
@@ -1280,7 +1252,7 @@ static const struct qcom_pcie_ops ops_2_3_2 = {
 static const struct qcom_pcie_ops ops_2_4_0 = {
 	.get_resources = qcom_pcie_get_resources_2_4_0,
 	.init = qcom_pcie_init_2_4_0,
-	.post_init = qcom_pcie_post_init_2_4_0,
+	.post_init = qcom_pcie_post_init_2_3_2,
 	.deinit = qcom_pcie_deinit_2_4_0,
 	.ltssm_enable = qcom_pcie_2_3_2_ltssm_enable,
 };
-- 
2.25.1