linux-kernel - [PATCHv3] ti-soc-thermal: request temperature periodically if hw can't do that itself

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Message-ID: <20150324222021.GA18924@amd>
Date:	Tue, 24 Mar 2015 23:20:21 +0100
From:	Pavel Machek <pavel@....cz>
To:	pali.rohar@...il.com, sre@...ian.org, sre@...g0.de,
	kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-omap@...r.kernel.org, tony@...mide.com, khilman@...nel.org,
	aaro.koskinen@....fi, ivo.g.dimitrov.75@...il.com,
	edubezval@...il.com, rui.zhang@...el.com, linux-pm@...r.kernel.org
Subject: [PATCHv3] ti-soc-thermal: request temperature periodically if hw
 can't do that itself


When periodic mode is not enabled, it is neccessary to force reads.

Signed-off-by: Pavel Machek <pavel@....cz>

diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
index 62a5d44..ec533e7 100644
--- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c
+++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c
@@ -43,6 +43,8 @@
 
 #include "ti-bandgap.h"
 
+static int ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id);
+
 /***   Helper functions to access registers and their bitfields   ***/
 
 /**
@@ -852,6 +854,12 @@ int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id,
 	if (ret)
 		return ret;
 
+	if (!TI_BANDGAP_HAS(bgp, MODE_CONFIG)) {
+		ret = ti_bandgap_force_single_read(bgp, id);
+		if (ret)
+			return ret;
+	}
+
 	spin_lock(&bgp->lock);
 	temp = ti_bandgap_read_temp(bgp, id);
 	spin_unlock(&bgp->lock);

--
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