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authorPaul Mundt <lethal@linux-sh.org>2011-03-17 16:44:08 +0900
committerPaul Mundt <lethal@linux-sh.org>2011-03-17 16:44:08 +0900
commit1d2a1959fe534279cf37aba20b08c24c20840e52 (patch)
tree67c0b9aa7fe22a44bf0b4af88947799203eb8f67 /arch/arm/mach-tegra/pcie.c
parent5a79ce76e9bb8f4b2cd8106ee36d15ee05013bcf (diff)
parent054cfaacf88865bff1dd58d305443d5d6c068a08 (diff)
downloadblackbird-op-linux-1d2a1959fe534279cf37aba20b08c24c20840e52.tar.gz
blackbird-op-linux-1d2a1959fe534279cf37aba20b08c24c20840e52.zip
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into sh-latest
Diffstat (limited to 'arch/arm/mach-tegra/pcie.c')
-rw-r--r--arch/arm/mach-tegra/pcie.c38
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;
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