linux-kernel - [PATCH 02/10] clk: mmp: frac: Allow setting bits other than the numerator/denominator

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Message-Id: <20200419172742.674717-3-lkundrak@v3.sk>
Date:   Sun, 19 Apr 2020 19:27:34 +0200
From:   Lubomir Rintel <lkundrak@...sk>
To:     Michael Turquette <mturquette@...libre.com>
Cc:     Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Lubomir Rintel <lkundrak@...sk>
Subject: [PATCH 02/10] clk: mmp: frac: Allow setting bits other than the numerator/denominator

For the I2S fractional clocks, there are more bits that need to be set
for the clock to run. Their actual meaning is unknown.

Signed-off-by: Lubomir Rintel <lkundrak@...sk>
---
 drivers/clk/mmp/clk-frac.c | 3 +++
 drivers/clk/mmp/clk.h      | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/clk/mmp/clk-frac.c b/drivers/clk/mmp/clk-frac.c
index ed9928f5bdc7f..48f592bd633df 100644
--- a/drivers/clk/mmp/clk-frac.c
+++ b/drivers/clk/mmp/clk-frac.c
@@ -148,7 +148,10 @@ static int clk_factor_init(struct clk_hw *hw)
 		val &= ~(masks->den_mask << masks->den_shift);
 		val |= (factor->ftbl[0].den & masks->den_mask) <<
 			masks->den_shift;
+	}
 
+	if (!(val & masks->enable_mask) || i >= factor->ftbl_cnt) {
+		val |= masks->enable_mask;
 		writel(val, factor->base);
 	}
 
diff --git a/drivers/clk/mmp/clk.h b/drivers/clk/mmp/clk.h
index 971b4d6d992fb..0efd5b0b2f01b 100644
--- a/drivers/clk/mmp/clk.h
+++ b/drivers/clk/mmp/clk.h
@@ -16,6 +16,7 @@ struct mmp_clk_factor_masks {
 	unsigned int den_mask;
 	unsigned int num_shift;
 	unsigned int den_shift;
+	unsigned int enable_mask;
 };
 
 struct mmp_clk_factor_tbl {
-- 
2.26.0