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From: Anson.Huang@nxp.com
To: robh+dt@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org,
	s.hauer@pengutronix.de, kernel@pengutronix.de,
	festevam@gmail.com, mturquette@baylibre.com, sboyd@kernel.org,
	rjw@rjwysocki.net, viresh.kumar@linaro.org,
	leonard.crestez@nxp.com, abel.vesa@nxp.com,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org,
	linux-pm@vger.kernel.org
Cc: Linux-imx@nxp.com
Subject: [PATCH 4/6] cpufreq: imx-cpufreq-dt: Add i.MX8MN support
Date: Thu, 15 Aug 2019 06:59:41 -0400
Message-ID: <1565866783-19672-4-git-send-email-Anson.Huang@nxp.com> (raw)
In-Reply-To: <1565866783-19672-1-git-send-email-Anson.Huang@nxp.com>

From: Anson Huang <Anson.Huang@nxp.com>

i.MX8MN has different speed grading definition as below, it has 4 bits
to define speed grading, add support for it.

 SPEED_GRADE[3:0]    MHz
    0000            2300
    0001            2200
    0010            2100
    0011            2000
    0100            1900
    0101            1800
    0110            1700
    0111            1600
    1000            1500
    1001            1400
    1010            1300
    1011            1200
    1100            1100
    1101            1000
    1110             900
    1111             800

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
 drivers/cpufreq/imx-cpufreq-dt.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/imx-cpufreq-dt.c b/drivers/cpufreq/imx-cpufreq-dt.c
index 4f85f31..35db14c 100644
--- a/drivers/cpufreq/imx-cpufreq-dt.c
+++ b/drivers/cpufreq/imx-cpufreq-dt.c
@@ -16,6 +16,7 @@
 
 #define OCOTP_CFG3_SPEED_GRADE_SHIFT	8
 #define OCOTP_CFG3_SPEED_GRADE_MASK	(0x3 << 8)
+#define IMX8MN_OCOTP_CFG3_SPEED_GRADE_MASK	(0xf << 8)
 #define OCOTP_CFG3_MKT_SEGMENT_SHIFT    6
 #define OCOTP_CFG3_MKT_SEGMENT_MASK     (0x3 << 6)
 
@@ -34,7 +35,12 @@ static int imx_cpufreq_dt_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	speed_grade = (cell_value & OCOTP_CFG3_SPEED_GRADE_MASK) >> OCOTP_CFG3_SPEED_GRADE_SHIFT;
+	if (of_machine_is_compatible("fsl,imx8mn"))
+		speed_grade = (cell_value & IMX8MN_OCOTP_CFG3_SPEED_GRADE_MASK)
+			      >> OCOTP_CFG3_SPEED_GRADE_SHIFT;
+	else
+		speed_grade = (cell_value & OCOTP_CFG3_SPEED_GRADE_MASK)
+			      >> OCOTP_CFG3_SPEED_GRADE_SHIFT;
 	mkt_segment = (cell_value & OCOTP_CFG3_MKT_SEGMENT_MASK) >> OCOTP_CFG3_MKT_SEGMENT_SHIFT;
 
 	/*
-- 
2.7.4


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  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-15 10:59 [PATCH 1/6] arm64: dts: imx8mn-ddr4-evk: Add i2c1 support Anson.Huang
2019-08-15 10:59 ` [PATCH 2/6] arm64: dts: imx8mn-ddr4-evk: Add rohm, bd71847 PMIC support Anson.Huang
2019-08-15 10:59 ` [PATCH 3/6] cpufreq: Use imx-cpufreq-dt for i.MX8MN's speed grading Anson.Huang
2019-08-15 10:59 ` Anson.Huang [this message]
2019-08-15 10:59 ` [PATCH 5/6] clk: imx8mn: Add necessary frequency support for ARM PLL table Anson.Huang
2019-08-17  3:52   ` Stephen Boyd
2019-08-17 22:22     ` Anson Huang
2019-08-18  1:11       ` Stephen Boyd
2019-08-18  6:19         ` Anson Huang
2019-08-15 10:59 ` [PATCH 6/6] arm64: dts: imx8mn: Add cpu-freq support Anson.Huang
2019-08-15 14:12 ` [PATCH 1/6] arm64: dts: imx8mn-ddr4-evk: Add i2c1 support Leonard Crestez

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