From: Andrey Smirnov <andrew.smirnov@gmail.com>
To: linux-pci@vger.kernel.org
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>,
Lucas Stach <l.stach@pengutronix.de>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Chris Healy <cphealy@gmail.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v4 01/11] PCI: imx6: Simplify imx7d_pcie_wait_for_phy_pll_lock()
Date: Sun, 14 Apr 2019 17:46:22 -0700 [thread overview]
Message-ID: <20190415004632.5907-2-andrew.smirnov@gmail.com> (raw)
In-Reply-To: <20190415004632.5907-1-andrew.smirnov@gmail.com>
Make use of regmap_read_poll_timeout() to simplify
imx7d_pcie_wait_for_phy_pll_lock(). No functional change intended.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: linux-kernel@vger.kernel.org
Cc: linux-pci@vger.kernel.org
---
drivers/pci/controller/dwc/pci-imx6.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 3d627f94a166..ea2617712a3b 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -89,9 +89,8 @@ struct imx6_pcie {
};
/* Parameters for the waiting for PCIe PHY PLL to lock on i.MX7 */
-#define PHY_PLL_LOCK_WAIT_MAX_RETRIES 2000
-#define PHY_PLL_LOCK_WAIT_USLEEP_MIN 50
#define PHY_PLL_LOCK_WAIT_USLEEP_MAX 200
+#define PHY_PLL_LOCK_WAIT_TIMEOUT (2000 * PHY_PLL_LOCK_WAIT_USLEEP_MAX)
/* PCIe Root Complex registers (memory-mapped) */
#define PCIE_RC_IMX6_MSI_CAP 0x50
@@ -488,20 +487,14 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
static void imx7d_pcie_wait_for_phy_pll_lock(struct imx6_pcie *imx6_pcie)
{
u32 val;
- unsigned int retries;
struct device *dev = imx6_pcie->pci->dev;
- for (retries = 0; retries < PHY_PLL_LOCK_WAIT_MAX_RETRIES; retries++) {
- regmap_read(imx6_pcie->iomuxc_gpr, IOMUXC_GPR22, &val);
-
- if (val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED)
- return;
-
- usleep_range(PHY_PLL_LOCK_WAIT_USLEEP_MIN,
- PHY_PLL_LOCK_WAIT_USLEEP_MAX);
- }
-
- dev_err(dev, "PCIe PLL lock timeout\n");
+ if (regmap_read_poll_timeout(imx6_pcie->iomuxc_gpr,
+ IOMUXC_GPR22, val,
+ val & IMX7D_GPR22_PCIE_PHY_PLL_LOCKED,
+ PHY_PLL_LOCK_WAIT_USLEEP_MAX,
+ PHY_PLL_LOCK_WAIT_TIMEOUT))
+ dev_err(dev, "PCIe PLL lock timeout\n");
}
static void imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie)
--
2.20.1
next prev parent reply other threads:[~2019-04-15 0:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-15 0:46 [PATCH v4 00/11] i.MX6, DesignWare PCI improvements Andrey Smirnov
2019-04-15 0:46 ` Andrey Smirnov [this message]
2019-04-15 0:46 ` [PATCH v4 02/11] PCI: imx6: Drop imx6_pcie_wait_for_link() Andrey Smirnov
2019-04-15 8:36 ` Lucas Stach
2019-04-15 0:46 ` [PATCH v4 03/11] PCI: imx6: Return -ETIMEOUT from imx6_pcie_wait_for_speed_change() Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 04/11] PCI: imx6: Remove PCIE_PL_PFLR_* constants Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 05/11] PCI: dwc: imx6: Share PHY debug register definitions Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 06/11] PCI: imx6: Make use of BIT() in constant definitions Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 07/11] PCI: imx6: Simplify bit operations in PHY functions Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 08/11] PCI: imx6: Simplify pcie_phy_poll_ack() Andrey Smirnov
2019-04-15 8:38 ` Lucas Stach
2019-04-15 0:46 ` [PATCH v4 09/11] PCI: imx6: Restrict PHY register data to 16-bit Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 10/11] PCI: imx6: Use flags to indicate support for suspend Andrey Smirnov
2019-04-15 0:46 ` [PATCH v4 11/11] PCI: imx6: Use usleep_range() in imx6_pcie_enable_ref_clk() Andrey Smirnov
2019-04-15 8:38 ` Lucas Stach
2019-05-01 10:39 ` [PATCH v4 00/11] i.MX6, DesignWare PCI improvements Lorenzo Pieralisi
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