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| author | Maxime Ripard | 2016-09-29 22:57:26 +0200 |
|---|---|---|
| committer | Maxime Ripard | 2016-10-25 12:40:23 +0200 |
| commit | 6e0d50daa97f4bf9706e343b4f71171e88921209 (patch) | |
| tree | f6957d043b7ef32fd7c1f65da3d25a32a7f53a40 /drivers/clk/sunxi-ng/ccu_nkmp.c | |
| parent | clk: sunxi-ng: Finish to convert to structures for arguments (diff) | |
| download | kernel-qcow2-linux-6e0d50daa97f4bf9706e343b4f71171e88921209.tar.gz kernel-qcow2-linux-6e0d50daa97f4bf9706e343b4f71171e88921209.tar.xz kernel-qcow2-linux-6e0d50daa97f4bf9706e343b4f71171e88921209.zip | |
clk: sunxi-ng: Add minimums for all the relevant structures and clocks
Modify the current clocks we have to be able to specify the minimum for
each clocks we support, just like we support the max.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Diffstat (limited to 'drivers/clk/sunxi-ng/ccu_nkmp.c')
| -rw-r--r-- | drivers/clk/sunxi-ng/ccu_nkmp.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c index fcf67572e55c..67c856e381a8 100644 --- a/drivers/clk/sunxi-ng/ccu_nkmp.c +++ b/drivers/clk/sunxi-ng/ccu_nkmp.c @@ -14,10 +14,10 @@ #include "ccu_nkmp.h" struct _ccu_nkmp { - unsigned long n, max_n; - unsigned long k, max_k; - unsigned long m, max_m; - unsigned long p, max_p; + unsigned long n, min_n, max_n; + unsigned long k, min_k, max_k; + unsigned long m, min_m, max_m; + unsigned long p, min_p, max_p; }; static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate, @@ -27,10 +27,10 @@ static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate, unsigned long best_n = 0, best_k = 0, best_m = 0, best_p = 0; unsigned long _n, _k, _m, _p; - for (_k = 1; _k <= nkmp->max_k; _k++) { - for (_n = 1; _n <= nkmp->max_n; _n++) { - for (_m = 1; _n <= nkmp->max_m; _m++) { - for (_p = 1; _p <= nkmp->max_p; _p <<= 1) { + for (_k = nkmp->min_k; _k <= nkmp->max_k; _k++) { + for (_n = nkmp->min_n; _n <= nkmp->max_n; _n++) { + for (_m = nkmp->min_m; _m <= nkmp->max_m; _m++) { + for (_p = nkmp->min_p; _p <= nkmp->max_p; _p <<= 1) { unsigned long tmp_rate; tmp_rate = parent * _n * _k / (_m * _p); @@ -107,9 +107,13 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate, struct ccu_nkmp *nkmp = hw_to_ccu_nkmp(hw); struct _ccu_nkmp _nkmp; + _nkmp.min_n = 1; _nkmp.max_n = 1 << nkmp->n.width; + _nkmp.min_k = 1; _nkmp.max_k = 1 << nkmp->k.width; + _nkmp.min_m = 1; _nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width; + _nkmp.min_p = 1; _nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1); ccu_nkmp_find_best(*parent_rate, rate, &_nkmp); @@ -125,9 +129,13 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long flags; u32 reg; + _nkmp.min_n = 1; _nkmp.max_n = 1 << nkmp->n.width; + _nkmp.min_k = 1; _nkmp.max_k = 1 << nkmp->k.width; + _nkmp.min_m = 1; _nkmp.max_m = nkmp->m.max ?: 1 << nkmp->m.width; + _nkmp.min_p = 1; _nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1); ccu_nkmp_find_best(parent_rate, rate, &_nkmp); |