[PATCH] ARM: tegra30: clocks: add AHB and APB clocks
Prashant Gaikwad
pgaikwad at nvidia.com
Mon Oct 22 00:38:20 EDT 2012
On Friday 19 October 2012 12:08 PM, Joseph Lo wrote:
> Adding the AHB and APB bus clock control interface for Tegra30.
>
> Signed-off-by: Joseph Lo<josephl at nvidia.com>
> ---
> arch/arm/mach-tegra/common.c | 4 +
> arch/arm/mach-tegra/tegra30_clocks.c | 106 +++++++++++++++++++++++++++++
> arch/arm/mach-tegra/tegra30_clocks.h | 1 +
> arch/arm/mach-tegra/tegra30_clocks_data.c | 46 +++++++++++++
> 4 files changed, 157 insertions(+), 0 deletions(-)
<snip>
> +
> +static long tegra30_bus_clk_round_rate(struct clk_hw *hw, unsigned long rate,
> + unsigned long *prate)
> +{
> + unsigned long parent_rate = *prate;
> + s64 divider;
> +
> + if (rate>= parent_rate)
> + return rate;
> +
return parent_rate?
> + divider = parent_rate;
> + divider += rate - 1;
> + do_div(divider, rate);
> +
> + if (divider< 0)
> + return divider;
> +
> + if (divider> 4)
> + divider = 4;
> + do_div(parent_rate, divider);
> +
> + return parent_rate;
> +}
>
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