linux-kernel - [PATCH 4.0 118/148] thermal: armada: Update Armada 380 thermal sensor coefficients

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Message-Id: <20150603114210.520308114@linuxfoundation.org>
Date:	Wed,  3 Jun 2015 21:09:48 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Nadav Haklai <nadavh@...vell.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Eduardo Valentin <edubezval@...il.com>
Subject: [PATCH 4.0 118/148] thermal: armada: Update Armada 380 thermal sensor coefficients

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nadav Haklai <nadavh@...vell.com>

commit efa86858e1d8970411a140fa1e0c4dd18a8f2a89 upstream.

Improve the Armada 380 thermal sensor accuracy by using updated formula.
The updated formula is:
Temperature[C degrees] = 0.4761 * tsen_vsen_out - 279.1

Signed-off-by: Nadav Haklai <nadavh@...vell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@...e-electrons.com>
Signed-off-by: Eduardo Valentin <edubezval@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/thermal/armada_thermal.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -224,9 +224,9 @@ static const struct armada_thermal_data
 	.is_valid_shift = 10,
 	.temp_shift = 0,
 	.temp_mask = 0x3ff,
-	.coef_b = 1169498786UL,
-	.coef_m = 2000000UL,
-	.coef_div = 4289,
+	.coef_b = 2931108200UL,
+	.coef_m = 5000000UL,
+	.coef_div = 10502,
 	.inverted = true,
 };
 


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