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| author | Arnd Bergmann <arnd@arndb.de> | 2012-03-21 18:27:34 +0400 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2012-03-21 18:27:34 +0400 |
| commit | 2cbe23e3a432e3d09a849adb197c8fcc09e7391d (patch) | |
| tree | 711fe5845c4c7e7eaf8c57a597d86c0f9dda5b06 /arch/arm/mach-tegra/pcie.c | |
| parent | b2f1df8d2fc14bf7e6d9d967043d4b60c2efd8dc (diff) | |
| parent | ed1b4acc43b0c3289faa30cf184f322ab70a5be3 (diff) | |
| download | linux-2cbe23e3a432e3d09a849adb197c8fcc09e7391d.tar.xz | |
Merge branch 'tegra/cleanups' into next/timer
Conflicts:
arch/arm/mach-tegra/Makefile
arch/arm/mach-vexpress/core.h
The tegra Makefile was changed in four different branches
in the same line. This merge should reduce the amount
of churn.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-tegra/pcie.c')
| -rw-r--r-- | arch/arm/mach-tegra/pcie.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c index af8b63435727..91536996c3f0 100644 --- a/arch/arm/mach-tegra/pcie.c +++ b/arch/arm/mach-tegra/pcie.c @@ -585,10 +585,10 @@ static void tegra_pcie_setup_translations(void) afi_writel(0, AFI_MSI_BAR_SZ); } -static void tegra_pcie_enable_controller(void) +static int tegra_pcie_enable_controller(void) { u32 val, reg; - int i; + int i, timeout; /* Enable slot clock and pulse the reset signals */ for (i = 0, reg = AFI_PEX0_CTRL; i < 2; i++, reg += 0x8) { @@ -639,8 +639,14 @@ static void tegra_pcie_enable_controller(void) pads_writel(0xfa5cfa5c, 0xc8); /* Wait for the PLL to lock */ + timeout = 300; do { val = pads_readl(PADS_PLL_CTL); + usleep_range(1000, 1000); + if (--timeout == 0) { + pr_err("Tegra PCIe error: timeout waiting for PLL\n"); + return -EBUSY; + } } while (!(val & PADS_PLL_CTL_LOCKDET)); /* turn off IDDQ override */ @@ -671,7 +677,7 @@ static void tegra_pcie_enable_controller(void) /* Disable all execptions */ afi_writel(0, AFI_FPCI_ERROR_MASKS); - return; + return 0; } static void tegra_pcie_xclk_clamp(bool clamp) @@ -921,7 +927,9 @@ int __init tegra_pcie_init(bool init_port0, bool init_port1) if (err) return err; - tegra_pcie_enable_controller(); + err = tegra_pcie_enable_controller(); + if (err) + return err; /* setup the AFI address translations */ tegra_pcie_setup_translations(); |