Author: manu
Date: Wed Aug 5 08:31:26 2020
New Revision: 363887
URL: https://svnweb.freebsd.org/changeset/base/363887
Log:
allwinner: clk: Fix nm clock calculation
Use the right factor when finding the best frequency and compare the
absolute value of the result.
Submitted by: kibab
MFC after: 3 days
Modified:
head/sys/arm/allwinner/clkng/aw_clk_nm.c
Modified: head/sys/arm/allwinner/clkng/aw_clk_nm.c
==============================================================================
--- head/sys/arm/allwinner/clkng/aw_clk_nm.c Wed Aug 5 07:34:45 2020
(r363886)
+++ head/sys/arm/allwinner/clkng/aw_clk_nm.c Wed Aug 5 08:31:26 2020
(r363887)
@@ -151,7 +151,7 @@ aw_clk_nm_find_best(struct aw_clk_nm_sc *sc, uint64_t
min_n = aw_clk_factor_get_min(&sc->n);
for (m = min_m; m <= max_m; ) {
- for (n = min_m; n <= max_n; ) {
+ for (n = min_n; n <= max_n; ) {
cur = fparent / n / m;
if (abs(*fout - cur) < abs(*fout - best)) {
best = cur;
@@ -196,7 +196,7 @@ aw_clk_nm_set_freq(struct clknode *clk, uint64_t fpare
clknode_get_freq(p_clk, &fparent);
cur = aw_clk_nm_find_best(sc, fparent, fout, &n, &m);
- if ((*fout - cur) < (*fout - best)) {
+ if (abs((*fout - cur)) < abs((*fout - best))) {
best = cur;
best_parent = p_idx;
best_n = n;
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