diff options
| author | Len Brown <len.brown@intel.com> | 2011-03-23 09:34:54 +0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-03-23 09:34:54 +0300 |
| commit | 02e2407858fd62053bf60349c0e72cd1c7a4a60e (patch) | |
| tree | 0ebdbddc97d3abbc675916010e7771065b70c137 /arch/arm/mach-tegra/pcie.c | |
| parent | 96e1c408ea8a556c5b51e0e7d56bd2afbfbf5fe9 (diff) | |
| parent | 6447f55da90b77faec1697d499ed7986bb4f6de6 (diff) | |
| download | linux-02e2407858fd62053bf60349c0e72cd1c7a4a60e.tar.xz | |
Merge branch 'linus' into release
Conflicts:
arch/x86/kernel/acpi/sleep.c
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/arm/mach-tegra/pcie.c')
| -rw-r--r-- | arch/arm/mach-tegra/pcie.c | 38 |
1 files changed, 28 insertions, 10 deletions
diff --git a/arch/arm/mach-tegra/pcie.c b/arch/arm/mach-tegra/pcie.c index 53f5fa37014a..2941212b853c 100644 --- a/arch/arm/mach-tegra/pcie.c +++ b/arch/arm/mach-tegra/pcie.c @@ -39,6 +39,7 @@ #include <mach/pinmux.h> #include <mach/iomap.h> #include <mach/clk.h> +#include <mach/powergate.h> /* register definitions */ #define AFI_OFFSET 0x3800 @@ -682,24 +683,41 @@ static void tegra_pcie_xclk_clamp(bool clamp) pmc_writel(reg, PMC_SCRATCH42); } -static int tegra_pcie_power_on(void) +static void tegra_pcie_power_off(void) { - tegra_pcie_xclk_clamp(true); tegra_periph_reset_assert(tegra_pcie.pcie_xclk); - tegra_pcie_xclk_clamp(false); + tegra_periph_reset_assert(tegra_pcie.afi_clk); + tegra_periph_reset_assert(tegra_pcie.pex_clk); - clk_enable(tegra_pcie.afi_clk); - clk_enable(tegra_pcie.pex_clk); - return clk_enable(tegra_pcie.pll_e); + tegra_powergate_power_off(TEGRA_POWERGATE_PCIE); + tegra_pcie_xclk_clamp(true); } -static void tegra_pcie_power_off(void) +static int tegra_pcie_power_regate(void) { + int err; + + tegra_pcie_power_off(); + + tegra_pcie_xclk_clamp(true); + tegra_periph_reset_assert(tegra_pcie.pcie_xclk); tegra_periph_reset_assert(tegra_pcie.afi_clk); - tegra_periph_reset_assert(tegra_pcie.pex_clk); - tegra_pcie_xclk_clamp(true); + err = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_PCIE, + tegra_pcie.pex_clk); + if (err) { + pr_err("PCIE: powerup sequence failed: %d\n", err); + return err; + } + + tegra_periph_reset_deassert(tegra_pcie.afi_clk); + + tegra_pcie_xclk_clamp(false); + + clk_enable(tegra_pcie.afi_clk); + clk_enable(tegra_pcie.pex_clk); + return clk_enable(tegra_pcie.pll_e); } static int tegra_pcie_clocks_get(void) @@ -759,7 +777,7 @@ static int __init tegra_pcie_get_resources(void) return err; } - err = tegra_pcie_power_on(); + err = tegra_pcie_power_regate(); if (err) { pr_err("PCIE: failed to power up: %d\n", err); goto err_pwr_on; |