tree ff5010155c5662f5ef0e96102b60a1a5b9548e41
parent d31fd43c0f9a41e2678a1e78c0f22f0384c6edd3
author Sylwester Nawrocki <s.nawrocki@samsung.com> 1500635990 +0200
committer Stephen Boyd <sboyd@codeaurora.org> 1501532163 -0700

clk: samsung: exynos5420: The EPLL rate table corrections

This patch fixes values of the EPLL K coefficient and changes
the EPLL output frequency values to match exactly what is
possible to achieve with given M, P, S, K coefficients.
This allows to avoid rounding errors and unexpected frequency
being set with clk_set_rate(), due to recalc_rate returning
different values than the PLL rate specified in the
exynos5420_epll_24mhz_tbl table. E.g. this prevents a case
where two consecutive clk_set_rate() calls with same argument
result in different PLL output frequency.

The PLL output frequencies have been calculated with formula:

f = fxtal * (M * 2^16 + K) / (P * 2^S) / 2^16

where fxtal = 24000000.

Fixes: 9842452acd ("clk: samsung: exynos542x: Add EPLL rate table")
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>