b167421e55
Add the latest linux available from https://github.com/armbian/build commit de58ac1faac92724c6449db12c22affaeb003875, tag: sunxi-5.3, alongside all the patches that it comes with. Signed-off-by: Vicentiu Galanopulo <vicentiu@balena.io>
76 lines
2.7 KiB
Diff
76 lines
2.7 KiB
Diff
From 9b15c5248e430f418621414f876170f08ca0a2cd Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Thu, 12 Jan 2017 16:37:24 +0100
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Subject: [PATCH 02/82] clk: sunxi-ng: Allow to limit the use of NKMP clock's P
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factor
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Some SoCs mandate the maximum clock rate for which the use
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of postdivider P factor is allowed. Allow to configure maximum
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clock rate.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/clk/sunxi-ng/ccu_nkmp.c | 13 ++++++++-----
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drivers/clk/sunxi-ng/ccu_nkmp.h | 1 +
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2 files changed, 9 insertions(+), 5 deletions(-)
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diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.c b/drivers/clk/sunxi-ng/ccu_nkmp.c
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index 1ad53d1016a3..080bf4a4ace6 100644
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--- a/drivers/clk/sunxi-ng/ccu_nkmp.c
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+++ b/drivers/clk/sunxi-ng/ccu_nkmp.c
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@@ -33,16 +33,19 @@ static unsigned long ccu_nkmp_calc_rate(unsigned long parent,
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}
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static void ccu_nkmp_find_best(unsigned long parent, unsigned long rate,
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- struct _ccu_nkmp *nkmp)
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+ struct _ccu_nkmp *nkmp, struct ccu_nkmp *_nkmp)
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{
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unsigned long best_rate = 0;
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unsigned long best_n = 0, best_k = 0, best_m = 0, best_p = 0;
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- unsigned long _n, _k, _m, _p;
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+ unsigned long _n, _k, _m, _p, _max_p;
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+
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+ _max_p = (_nkmp->max_rate_for_p == 0 || rate <= _nkmp->max_rate_for_p) ?
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+ nkmp->max_p : nkmp->min_p;
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for (_k = nkmp->min_k; _k <= nkmp->max_k; _k++) {
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for (_n = nkmp->min_n; _n <= nkmp->max_n; _n++) {
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for (_m = nkmp->min_m; _m <= nkmp->max_m; _m++) {
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- for (_p = nkmp->min_p; _p <= nkmp->max_p; _p <<= 1) {
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+ for (_p = nkmp->min_p; _p <= _max_p; _p <<= 1) {
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unsigned long tmp_rate;
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tmp_rate = ccu_nkmp_calc_rate(parent,
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@@ -146,7 +149,7 @@ static long ccu_nkmp_round_rate(struct clk_hw *hw, unsigned long rate,
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_nkmp.min_p = 1;
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_nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1);
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- ccu_nkmp_find_best(*parent_rate, rate, &_nkmp);
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+ ccu_nkmp_find_best(*parent_rate, rate, &_nkmp, nkmp);
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rate = ccu_nkmp_calc_rate(*parent_rate, _nkmp.n, _nkmp.k,
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_nkmp.m, _nkmp.p);
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@@ -177,7 +180,7 @@ static int ccu_nkmp_set_rate(struct clk_hw *hw, unsigned long rate,
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_nkmp.min_p = 1;
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_nkmp.max_p = nkmp->p.max ?: 1 << ((1 << nkmp->p.width) - 1);
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- ccu_nkmp_find_best(parent_rate, rate, &_nkmp);
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+ ccu_nkmp_find_best(parent_rate, rate, &_nkmp, nkmp);
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if (nkmp->n.width)
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n_mask = GENMASK(nkmp->n.width + nkmp->n.shift - 1,
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diff --git a/drivers/clk/sunxi-ng/ccu_nkmp.h b/drivers/clk/sunxi-ng/ccu_nkmp.h
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index 6940503e7fc4..bbea3e5ed6fb 100644
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--- a/drivers/clk/sunxi-ng/ccu_nkmp.h
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+++ b/drivers/clk/sunxi-ng/ccu_nkmp.h
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@@ -33,6 +33,7 @@ struct ccu_nkmp {
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struct ccu_mult_internal k;
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struct ccu_div_internal m;
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struct ccu_div_internal p;
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+ unsigned long max_rate_for_p;
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unsigned int fixed_post_div;
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--
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2.20.1
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