On Thu, Sep 16, 2010 at 9:53 AM, Mike Rapoport <mike@xxxxxxxxxxxxxx> wrote:
> Signed-off-by: Mike Rapoport <mike@xxxxxxxxxxxxxx>
> ---
> arch/arm/mach-tegra/Kconfig | 4 +
> arch/arm/mach-tegra/Makefile | 1 +
> arch/arm/mach-tegra/board.h | 1 +
> arch/arm/mach-tegra/include/mach/hardware.h | 4 +
> arch/arm/mach-tegra/pcie.c | 889 +++++++++++++++++++++++++++
> 5 files changed, 899 insertions(+), 0 deletions(-)
> create mode 100644 arch/arm/mach-tegra/pcie.c
>
<snip>
> +/* register definitions */
> +#define AFI_OFSET 0x3800
> +#define PADS_OFSET 0x3000
OFFSET
> +#define RP0_OFFSET 0x0000
> +#define RP1_OFFSET 0x1000
<snip>
> +static void tegra_pcie_xclk_clamp(bool clamp)
> +{
> + u32 reg;
> +
> + reg = pmc_readl(PMC_SCRATCH42) & ~PMC_SCRATCH42_PCX_CLAMP;
> +
> + if (clamp)
> + reg |= PMC_SCRATCH42_PCX_CLAMP;
> +
> + pmc_writel(reg, PMC_SCRATCH42);
> +}
Maybe add this to mach-tegra/powergate.c, to avoid having to set PMC
registers directly?
> +static int tegra_pcie_power_on(void)
> +{
> + int err;
> +
> + tegra_pcie_xclk_clamp(true);
> + tegra_periph_reset_assert(tegra_pcie.pcie_xclk);
> + tegra_pcie_xclk_clamp(false);
> +
> + clk_enable(tegra_pcie.afi_clk);
> + clk_enable(tegra_pcie.pex_clk);
> + return clk_enable(tegra_pcie.pll_e);
> +}
Any reason you can't use the powergate api here too?
> +static void tegra_pcie_power_off(void)
> +{
> + 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);
> +}
Can you power off the pcie partition?
--
To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
