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From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: barebox@lists.infradead.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Subject: [PATCH v4 17/17] PCI: imx6: Port imx6_pcie_ltssm_enable()
Date: Wed, 16 Jan 2019 18:17:00 -0800	[thread overview]
Message-ID: <20190117021700.4443-18-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190117021700.4443-1-andrew.smirnov@gmail.com>

Port imx6_pcie_ltssm_enable() from Linux kernel driver.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
---
 drivers/pci/pci-imx6.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/drivers/pci/pci-imx6.c b/drivers/pci/pci-imx6.c
index 9aa307aabf..c1719093be 100644
--- a/drivers/pci/pci-imx6.c
+++ b/drivers/pci/pci-imx6.c
@@ -457,6 +457,23 @@ static int imx6_pcie_wait_for_speed_change(struct imx6_pcie *imx6_pcie)
 	return -EINVAL;
 }
 
+static void imx6_pcie_ltssm_enable(struct device_d *dev)
+{
+	struct imx6_pcie *imx6_pcie = dev->priv;
+	u32 gpr12;
+
+	switch (imx6_pcie->variant) {
+	case IMX6Q:
+	case IMX6QP:
+		gpr12 = readl(imx6_pcie->iomuxc_gpr + IOMUXC_GPR12);
+		gpr12 |= IMX6Q_GPR12_PCIE_CTL_2;
+		writel(gpr12, imx6_pcie->iomuxc_gpr + IOMUXC_GPR12);
+		break;
+	case IMX7D:
+		reset_control_deassert(imx6_pcie->apps_reset);
+		break;
+	}
+}
 
 static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
 {
@@ -464,7 +481,6 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
 	struct device_d *dev = pci->dev;
 	uint32_t tmp;
 	int ret;
-	u32 gpr12;
 
 	/*
 	 * Force Gen1 operation when starting the link.  In case the link is
@@ -476,14 +492,7 @@ static int imx6_pcie_establish_link(struct imx6_pcie *imx6_pcie)
 	tmp |= PCIE_RC_LCR_MAX_LINK_SPEEDS_GEN1;
 	dw_pcie_writel_dbi(pci, PCIE_RC_LCR, tmp);
 
-	/* Start LTSSM. */
-	if (imx6_pcie->variant == IMX7D) {
-		reset_control_deassert(imx6_pcie->apps_reset);
-	} else {
-		gpr12 = readl(imx6_pcie->iomuxc_gpr + IOMUXC_GPR12);
-		gpr12 |= IMX6Q_GPR12_PCIE_CTL_2;
-		writel(gpr12, imx6_pcie->iomuxc_gpr + IOMUXC_GPR12);
-	}
+	imx6_pcie_ltssm_enable(dev);
 
 	ret = imx6_pcie_wait_for_link(imx6_pcie);
 	if (ret)
-- 
2.20.1


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  parent reply	other threads:[~2019-01-17  2:17 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-17  2:16 [PATCH v4 00/17] PCIe support for i.MX7 Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 01/17] regulator: Convert drivers to use struct regulator_desc Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 02/17] regulator: Port basic regmap regulator functions Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 03/17] regulator: Add support for setting regulator's voltage Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 04/17] base: driver: Drop redundant list_empty() check Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 05/17] regulator: Assume probe deferral instead of missing regulator Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 06/17] regulator: Port ANATOP driver from Linux Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 07/17] drivers: base: Port power management code " Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 08/17] soc: imx: Add GPCv2 power gating driver Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 09/17] reset: Add i.MX7 SRC reset driver Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 10/17] reset: Mark local functions as static Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 11/17] PCI: imx6: Add code to support i.MX7D Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 12/17] PCI: imx6: Allow probe deferral by reset GPIO Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 13/17] PCI: imx6: Do not wait for speed change on i.MX7 Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 14/17] PCI: imx6: Do not switch speed if Gen2 is disabled Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 15/17] PCI: imx6: Fix spelling mistake: "contol" -> "control" Andrey Smirnov
2019-01-17  2:16 ` [PATCH v4 16/17] PCI: imx6: Drop unnecessary root_bus_nr setting Andrey Smirnov
2019-01-17  2:17 ` Andrey Smirnov [this message]
2019-01-17  8:46 ` [PATCH v4 00/17] PCIe support for i.MX7 Sascha Hauer

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