1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
10 #define div_mask(w) ((1 << (w)) - 1)
12 int div_frac_get(unsigned long rate, unsigned parent_rate, u8 width,
13 u8 frac_width, u8 flags)
15 u64 divider_ux1 = parent_rate;
21 mul = 1 << frac_width;
23 if (!(flags & TEGRA_DIVIDER_INT))
26 if (flags & TEGRA_DIVIDER_ROUND_UP)
27 divider_ux1 += rate - 1;
29 do_div(divider_ux1, rate);
31 if (flags & TEGRA_DIVIDER_INT)
34 if (divider_ux1 < mul)
39 if (divider_ux1 > div_mask(width))
40 return div_mask(width);