linux-kernel - [PATCHv2 5/5] staging: omap-thermal: fix context restore function

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Message-ID: <1352830204-21546-6-git-send-email-eduardo.valentin@ti.com>
Date:	Tue, 13 Nov 2012 14:10:04 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	<gregkh@...uxfoundation.org>
CC:	<b-cousson@...com>, <devel@...verdev.osuosl.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Radhesh Fadnis <radhesh.fadnis@...com>,
	Enric Balletbo i Serra <eballetbo@...il.com>,
	Eduardo Valentin <eduardo.valentin@...com>
Subject: [PATCHv2 5/5] staging: omap-thermal: fix context restore function

From: Radhesh Fadnis <radhesh.fadnis@...com>

In the context restore function, if the context is lost or
not is being checked by the contents of the counter register.
But this is logic hold good as long as counter reset value is
zero, if the reset value is non-zero then above logic doesn't
hold good. Hence removed checking of the register value and
restoring the context.

Signed-off-by: Radhesh Fadnis <radhesh.fadnis@...com>
Signed-off-by: Enric Balletbo i Serra <eballetbo@...il.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@...com>
---
 drivers/staging/omap-thermal/omap-bandgap.c |   57 ++++++++++-----------------
 1 files changed, 21 insertions(+), 36 deletions(-)

diff --git a/drivers/staging/omap-thermal/omap-bandgap.c b/drivers/staging/omap-thermal/omap-bandgap.c
index 3eb726f..c17bc95 100644
--- a/drivers/staging/omap-thermal/omap-bandgap.c
+++ b/drivers/staging/omap-thermal/omap-bandgap.c
@@ -1065,7 +1065,6 @@ static int omap_bandgap_save_ctxt(struct omap_bandgap *bg_ptr)
 static int omap_bandgap_restore_ctxt(struct omap_bandgap *bg_ptr)
 {
 	int i;
-	u32 temp = 0;
 
 	for (i = 0; i < bg_ptr->conf->sensor_count; i++) {
 		struct temp_sensor_registers *tsr;
@@ -1078,41 +1077,27 @@ static int omap_bandgap_restore_ctxt(struct omap_bandgap *bg_ptr)
 		if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
 			val = omap_bandgap_readl(bg_ptr, tsr->bgap_counter);
 
-		if (val == 0) {
-			if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG))
-				omap_bandgap_writel(bg_ptr,
-					rval->tshut_threshold,
-						   tsr->tshut_threshold);
-			/* Force immediate temperature measurement and update
-			 * of the DTEMP field
-			 */
-			omap_bandgap_force_single_read(bg_ptr, i);
-
-			if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
-				omap_bandgap_writel(bg_ptr, rval->bg_counter,
-							   tsr->bgap_counter);
-			if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG))
-				omap_bandgap_writel(bg_ptr, rval->bg_mode_ctrl,
-							   tsr->bgap_mode_ctrl);
-			if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) {
-				omap_bandgap_writel(bg_ptr,
-							   rval->bg_threshold,
-							   tsr->bgap_threshold);
-				omap_bandgap_writel(bg_ptr, rval->bg_ctrl,
-							   tsr->bgap_mask_ctrl);
-			}
-		} else {
-			temp = omap_bandgap_readl(bg_ptr,
-						  tsr->temp_sensor_ctrl);
-			temp &= (tsr->bgap_dtemp_mask);
-			omap_bandgap_force_single_read(bg_ptr, i);
-			if (temp == 0 && OMAP_BANDGAP_HAS(bg_ptr, TALERT)) {
-				temp = omap_bandgap_readl(bg_ptr,
-							  tsr->bgap_mask_ctrl);
-				temp |= 1 << __ffs(tsr->mode_ctrl_mask);
-				omap_bandgap_writel(bg_ptr, temp,
-							   tsr->bgap_mask_ctrl);
-			}
+		if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG))
+			omap_bandgap_writel(bg_ptr,
+				rval->tshut_threshold,
+					   tsr->tshut_threshold);
+		/* Force immediate temperature measurement and update
+		 * of the DTEMP field
+		 */
+		omap_bandgap_force_single_read(bg_ptr, i);
+
+		if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER))
+			omap_bandgap_writel(bg_ptr, rval->bg_counter,
+						   tsr->bgap_counter);
+		if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG))
+			omap_bandgap_writel(bg_ptr, rval->bg_mode_ctrl,
+						   tsr->bgap_mode_ctrl);
+		if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) {
+			omap_bandgap_writel(bg_ptr,
+						   rval->bg_threshold,
+						   tsr->bgap_threshold);
+			omap_bandgap_writel(bg_ptr, rval->bg_ctrl,
+						   tsr->bgap_mask_ctrl);
 		}
 	}
 
-- 
1.7.7.1.488.ge8e1c

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