From: Paul Cercueil <paul@crapouillou.net>
To: Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org,
Paul Cercueil <paul@crapouillou.net>
Subject: [PATCH] clk: ingenic/jz4740: Fix "pll half" divider not read/written properly
Date: Mon, 1 Jul 2019 13:36:06 +0200 [thread overview]
Message-ID: <20190701113606.4130-1-paul@crapouillou.net> (raw)
The code was setting the bit 21 of the CPCCR register to use a divider
of 2 for the "pll half" clock, and clearing the bit to use a divider
of 1.
This is the opposite of how this register field works: a cleared bit
means that the /2 divider is used, and a set bit means that the divider
is 1.
Restore the correct behaviour using the newly introduced .div_table
field.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
drivers/clk/ingenic/jz4740-cgu.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/clk/ingenic/jz4740-cgu.c b/drivers/clk/ingenic/jz4740-cgu.c
index a7f8ce60c957..0957ba4a40a5 100644
--- a/drivers/clk/ingenic/jz4740-cgu.c
+++ b/drivers/clk/ingenic/jz4740-cgu.c
@@ -53,6 +53,10 @@ static const u8 jz4740_cgu_cpccr_div_table[] = {
1, 2, 3, 4, 6, 8, 12, 16, 24, 32,
};
+static const u8 jz4740_cgu_pll_half_div_table[] = {
+ 2, 1,
+};
+
static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
/* External clocks */
@@ -86,7 +90,10 @@ static const struct ingenic_cgu_clk_info jz4740_cgu_clocks[] = {
[JZ4740_CLK_PLL_HALF] = {
"pll half", CGU_CLK_DIV,
.parents = { JZ4740_CLK_PLL, -1, -1, -1 },
- .div = { CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1 },
+ .div = {
+ CGU_REG_CPCCR, 21, 1, 1, -1, -1, -1,
+ jz4740_cgu_pll_half_div_table,
+ },
},
[JZ4740_CLK_CCLK] = {
--
2.21.0.593.g511ec345e18
next reply other threads:[~2019-07-01 11:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-01 11:36 Paul Cercueil [this message]
2019-08-07 21:33 ` [PATCH] clk: ingenic/jz4740: Fix "pll half" divider not read/written properly Stephen Boyd
2019-08-07 23:28 ` Paul Cercueil
2019-08-08 4:08 ` Stephen Boyd
2019-08-08 13:18 ` Paul Cercueil
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