linux-kernel - [PATCH v1] clk: tegra: clk-dfll: scale force_val with coefficient according to whether cg

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Message-ID: <20251026231859.823231-1-alex.t.tran@gmail.com>
Date: Sun, 26 Oct 2025 16:18:59 -0700
From: Alex Tran <alex.t.tran@...il.com>
To: pdeschrijver@...dia.com,
	pgaikwad@...dia.com,
	mturquette@...libre.com,
	sboyd@...nel.org,
	thierry.reding@...il.com,
	jonathanh@...dia.com
Cc: linux-clk@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alex Tran <alex.t.tran@...il.com>
Subject: [PATCH v1] clk: tegra: clk-dfll: scale force_val with coefficient according to whether cg_scale is set

force_val was hard coded to use a coefficient of 128,
regardless of the cg_scale configuration. This should instead match the
DFLL_PARAMS_CG_SCALE bit, use a coefficient of 128 when
cg_scale is set, or 1 when not set.

Signed-off-by: Alex Tran <alex.t.tran@...il.com>
---
 drivers/clk/tegra/clk-dfll.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/tegra/clk-dfll.c b/drivers/clk/tegra/clk-dfll.c
index 22dc29432eff..3362983eedcf 100644
--- a/drivers/clk/tegra/clk-dfll.c
+++ b/drivers/clk/tegra/clk-dfll.c
@@ -882,7 +882,7 @@ static void dfll_set_frequency_request(struct tegra_dfll *td,
 {
 	u32 val = 0;
 	int force_val;
-	int coef = 128; /* FIXME: td->cg_scale? */
+	int coef = td->cg_scale ? 128 : 1;
 
 	force_val = (req->lut_index - td->lut_safe) * coef / td->cg;
 	force_val = clamp(force_val, FORCE_MIN, FORCE_MAX);
-- 
2.51.0