From: peng.fan@nxp.com
To: shawnguo@kernel.org, s.hauer@pengutronix.de, sboyd@kernel.org,
robh+dt@kernel.org, viresh.kumar@linaro.org, rjw@rjwysocki.net
Cc: kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com,
Anson.Huang@nxp.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, abel.vesa@nxp.com,
Peng Fan <peng.fan@nxp.com>
Subject: [PATCH v2 04/14] clk: imx: pfdv2: switch to use determine_rate
Date: Wed, 19 Feb 2020 15:59:47 +0800 [thread overview]
Message-ID: <1582099197-20327-5-git-send-email-peng.fan@nxp.com> (raw)
In-Reply-To: <1582099197-20327-1-git-send-email-peng.fan@nxp.com>
From: Peng Fan <peng.fan@nxp.com>
Per clk_ops, compared with round_rate, determine_rate could optionally
support the parent clock that should be used to provide the clock rate.
In this patch, the parent clock is just parent->rate as round_rate.
The following patch will calculate the best parent clock.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/clk/imx/clk-pfdv2.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/drivers/clk/imx/clk-pfdv2.c b/drivers/clk/imx/clk-pfdv2.c
index f8707278aad9..28b5f208ced9 100644
--- a/drivers/clk/imx/clk-pfdv2.c
+++ b/drivers/clk/imx/clk-pfdv2.c
@@ -98,10 +98,11 @@ static unsigned long clk_pfdv2_recalc_rate(struct clk_hw *hw,
return tmp;
}
-static long clk_pfdv2_round_rate(struct clk_hw *hw, unsigned long rate,
- unsigned long *prate)
+static int clk_pfdv2_determine_rate(struct clk_hw *hw,
+ struct clk_rate_request *req)
{
- u64 tmp = *prate;
+ u64 tmp = req->best_parent_rate;
+ u64 rate = req->rate;
u8 frac;
tmp = tmp * 18 + rate / 2;
@@ -113,11 +114,13 @@ static long clk_pfdv2_round_rate(struct clk_hw *hw, unsigned long rate,
else if (frac > 35)
frac = 35;
- tmp = *prate;
+ tmp = req->best_parent_rate;
tmp *= 18;
do_div(tmp, frac);
- return tmp;
+ req->rate = tmp;
+
+ return 0;
}
static int clk_pfdv2_is_enabled(struct clk_hw *hw)
@@ -167,7 +170,7 @@ static const struct clk_ops clk_pfdv2_ops = {
.enable = clk_pfdv2_enable,
.disable = clk_pfdv2_disable,
.recalc_rate = clk_pfdv2_recalc_rate,
- .round_rate = clk_pfdv2_round_rate,
+ .determine_rate = clk_pfdv2_determine_rate,
.set_rate = clk_pfdv2_set_rate,
.is_enabled = clk_pfdv2_is_enabled,
};
--
2.16.4
next prev parent reply other threads:[~2020-02-19 8:06 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-19 7:59 [PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt peng.fan
2020-02-19 7:59 ` [PATCH v2 01/14] dt-bindings: fsl: add i.MX7ULP PMC binding doc peng.fan
2020-03-10 5:49 ` Shawn Guo
2020-03-10 5:56 ` Peng Fan
2020-03-11 7:39 ` Peng Fan
2020-03-11 7:39 ` Peng Fan
2020-02-19 7:59 ` [PATCH v2 02/14] ARM: dts: imx7ulp: add pmc node peng.fan
2020-02-19 7:59 ` [PATCH v2 03/14] clk: imx: Fix division by zero warning on pfdv2 peng.fan
2020-03-10 5:53 ` Shawn Guo
2020-02-19 7:59 ` peng.fan [this message]
2020-03-10 6:02 ` [PATCH v2 04/14] clk: imx: pfdv2: switch to use determine_rate Shawn Guo
2020-02-19 7:59 ` [PATCH v2 05/14] clk: imx: pfdv2: determine best parent rate peng.fan
2020-03-10 6:04 ` Shawn Guo
2020-02-19 7:59 ` [PATCH v2 06/14] clk: imx: pllv4: use prepare/unprepare peng.fan
2020-03-10 6:04 ` Shawn Guo
2020-02-19 7:59 ` [PATCH v2 07/14] clk: imx7ulp: make it easy to change ARM core clk peng.fan
2020-03-10 6:09 ` Shawn Guo
2020-03-10 6:19 ` Peng Fan
2020-02-19 7:59 ` [PATCH v2 08/14] ARM: imx: imx7ulp: support HSRUN mode peng.fan
2020-02-19 7:59 ` [PATCH v2 09/14] ARM: imx: cpuidle-imx7ulp: Stop mode disallowed when HSRUN peng.fan
2020-03-10 6:13 ` Shawn Guo
2020-03-10 7:35 ` Peng Fan
2020-02-19 7:59 ` [PATCH v2 10/14] cpufreq: dt: Allow platform specific intermediate callbacks peng.fan
2020-02-19 9:35 ` Viresh Kumar
2020-02-19 9:41 ` Peng Fan
2020-02-19 9:45 ` Viresh Kumar
2020-02-19 9:46 ` Viresh Kumar
2020-02-19 9:55 ` Peng Fan
2020-03-12 10:15 ` Viresh Kumar
2020-02-19 7:59 ` [PATCH v2 11/14] cpufreq: Add i.MX7ULP to cpufreq-dt-platdev blacklist peng.fan
2020-02-19 7:59 ` [PATCH v2 12/14] cpufreq: imx-cpufreq-dt: support i.MX7ULP peng.fan
2020-02-19 7:59 ` [PATCH v2 13/14] ARM: imx7ulp: enable cpufreq peng.fan
2020-02-19 7:59 ` [PATCH v2 14/14] [Do not Apply] ARM: dts: imx7ulp: add cpu OPP points peng.fan
2020-03-02 1:40 ` [PATCH v2 00/14] ARM: imx7ulp: add cpufreq using cpufreq-dt Peng Fan
2020-03-02 17:48 ` Fabio Estevam
2020-03-03 1:08 ` Peng Fan
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