From: Jerome Brunet <jbrunet@baylibre.com>
To: Neil Armstrong <narmstrong@baylibre.com>
Cc: Jerome Brunet <jbrunet@baylibre.com>,
Kevin Hilman <khilman@baylibre.com>,
Carlo Caione <carlo@caione.org>,
Michael Turquette <mturquette@baylibre.com>,
Stephen Boyd <sboyd@codeaurora.org>,
linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 9/9] clk: meson: axg: add the fractional part of the fixed_pll
Date: Fri, 19 Jan 2018 16:55:29 +0100 [thread overview]
Message-ID: <20180119155529.11532-10-jbrunet@baylibre.com> (raw)
In-Reply-To: <20180119155529.11532-1-jbrunet@baylibre.com>
The fixed_pll also has a fractional part. On axg s400 board, without
this parameter, the calculated rate is off by ~8Mhz (0,4%). The fixed_pll
being the root of the peripheral clock tree, this error is propagated to
the rest of the clocks
Adding the definition of the parameter fixes the problem
Fixes: 78b4af312f91 ("clk: meson-axg: add clock controller drivers")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
drivers/clk/meson/axg.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/clk/meson/axg.c b/drivers/clk/meson/axg.c
index 56806c6bd9d5..953e119635a2 100644
--- a/drivers/clk/meson/axg.c
+++ b/drivers/clk/meson/axg.c
@@ -37,6 +37,11 @@ static struct meson_clk_pll axg_fixed_pll = {
.shift = 16,
.width = 2,
},
+ .frac = {
+ .reg_off = HHI_MPLL_CNTL2,
+ .shift = 0,
+ .width = 12,
+ },
.lock = &meson_clk_lock,
.hw.init = &(struct clk_init_data){
.name = "fixed_pll",
--
2.14.3
next prev parent reply other threads:[~2018-01-19 15:56 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-19 15:55 [PATCH v2 0/9] clk: meson: pll fixes Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 1/9] clk: meson: check pll rate param table before using it Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 2/9] clk: meson: remove useless pll rate params tables Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 3/9] clk: meson: remove unnecessary rounding in the pll clock Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 4/9] clk: meson: use the frac parameter width instead of a constant Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 5/9] clk: meson: add od3 to the pll driver Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 6/9] clk: meson: add the gxl hdmi pll Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 7/9] clk: meson: fix rate calculation of plls with a fractional part Jerome Brunet
2018-01-19 15:55 ` [PATCH v2 8/9] clk: meson: gxbb: add the fractional part of the fixed_pll Jerome Brunet
2018-01-19 15:55 ` Jerome Brunet [this message]
2018-01-30 19:10 ` [PATCH v2 0/9] clk: meson: pll fixes Jerome Brunet
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