130 lines
4.6 KiB
Diff
130 lines
4.6 KiB
Diff
From 1234701636ab3dca340a336aa9ddfadd64914e58 Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Sun, 24 Feb 2013 16:30:57 +0000
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Subject: [PATCH 052/196] Add retry on error and tidy of temperature driver
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---
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drivers/thermal/bcm2835-thermal.c | 78 ++++++++++++++-------------------------
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1 file changed, 27 insertions(+), 51 deletions(-)
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diff --git a/drivers/thermal/bcm2835-thermal.c b/drivers/thermal/bcm2835-thermal.c
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index 3f9a733..85fceb5 100644
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--- a/drivers/thermal/bcm2835-thermal.c
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+++ b/drivers/thermal/bcm2835-thermal.c
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@@ -33,7 +33,6 @@
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#define print_debug(fmt,...)
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#endif
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#define print_err(fmt,...) printk(KERN_ERR "%s:%s:%d: "fmt"\n", MODULE_NAME, __func__,__LINE__, ##__VA_ARGS__)
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-#define print_info(fmt,...) printk(KERN_INFO "%s: "fmt"\n", MODULE_NAME, ##__VA_ARGS__)
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#define VC_TAG_GET_TEMP 0x00030006
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#define VC_TAG_GET_MAX_TEMP 0x0003000A
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@@ -66,12 +65,6 @@ struct bcm2835_thermal_data {
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struct vc_msg msg;
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};
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-/* --- PROTOTYPES --- */
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-static int bcm2835_get_temp(struct thermal_zone_device *thermal_dev, unsigned long *);
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-static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int, unsigned long *);
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-static int bcm2835_get_trip_type(struct thermal_zone_device *thermal_dev, int trip_num, enum thermal_trip_type *trip_type);
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-static int bcm2835_get_mode(struct thermal_zone_device *thermal_dev, enum thermal_device_mode *dev_mode);
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-
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/* --- GLOBALS --- */
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static struct bcm2835_thermal_data bcm2835_data;
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@@ -79,64 +72,47 @@ static struct bcm2835_thermal_data bcm2835_data;
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static struct thermal_zone_device_ops ops;
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/* --- FUNCTIONS --- */
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-static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int trip_num, unsigned long *temp)
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-{
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- int result;
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+static int bcm2835_get_temp_or_max(struct thermal_zone_device *thermal_dev, unsigned long *temp, unsigned tag_id)
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+{
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+ int result = -1, retry = 3;
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print_debug("IN");
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- /* wipe all previous message data */
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- memset(&bcm2835_data.msg, 0, sizeof bcm2835_data.msg);
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-
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- /* prepare message */
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- bcm2835_data.msg.msg_size = sizeof bcm2835_data.msg;
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- bcm2835_data.msg.tag.buffer_size = 8;
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- bcm2835_data.msg.tag.tag_id = VC_TAG_GET_MAX_TEMP;
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-
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- /* send the message */
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- result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg);
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+ *temp = 0;
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+ while (result != 0 && retry-- > 0) {
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+ /* wipe all previous message data */
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+ memset(&bcm2835_data.msg, 0, sizeof bcm2835_data.msg);
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+
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+ /* prepare message */
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+ bcm2835_data.msg.msg_size = sizeof bcm2835_data.msg;
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+ bcm2835_data.msg.tag.buffer_size = 8;
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+ bcm2835_data.msg.tag.tag_id = tag_id;
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+
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+ /* send the message */
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+ result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg);
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+ print_debug("Got %stemperature as %u (%d,%x)\n", tag_id==VC_TAG_GET_MAX_TEMP ? "max ":"", (uint)bcm2835_data.msg.tag.val, result, bcm2835_data.msg.request_code);
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+ if (!(bcm2835_data.msg.request_code & 0x80000000))
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+ result = -1;
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+ }
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/* check if it was all ok and return the rate in milli degrees C */
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- if (result == 0 && (bcm2835_data.msg.request_code & 0x80000000))
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+ if (result == 0)
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*temp = (uint)bcm2835_data.msg.tag.val;
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- #ifdef THERMAL_DEBUG_ENABLE
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else
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- print_debug("Failed to get temperature!");
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- #endif
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- print_debug("Got temperature as %u",(uint)*temp);
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+ print_err("Failed to get temperature! (%x:%d)\n", tag_id, result);
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print_debug("OUT");
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- return 0;
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+ return result;
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}
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static int bcm2835_get_temp(struct thermal_zone_device *thermal_dev, unsigned long *temp)
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{
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- int result;
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-
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- print_debug("IN");
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-
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- /* wipe all previous message data */
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- memset(&bcm2835_data.msg, 0, sizeof bcm2835_data.msg);
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-
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- /* prepare message */
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- bcm2835_data.msg.msg_size = sizeof bcm2835_data.msg;
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- bcm2835_data.msg.tag.buffer_size = 8;
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- bcm2835_data.msg.tag.tag_id = VC_TAG_GET_TEMP;
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-
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- /* send the message */
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- result = bcm_mailbox_property(&bcm2835_data.msg, sizeof bcm2835_data.msg);
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-
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- /* check if it was all ok and return the rate in milli degrees C */
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- if (result == 0 && (bcm2835_data.msg.request_code & 0x80000000))
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- *temp = (uint)bcm2835_data.msg.tag.val;
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- #ifdef THERMAL_DEBUG_ENABLE
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- else
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- print_debug("Failed to get temperature!");
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- #endif
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- print_debug("Got temperature as %u",(uint)*temp);
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- print_debug("OUT");
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- return 0;
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+ return bcm2835_get_temp_or_max(thermal_dev, temp, VC_TAG_GET_TEMP);
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}
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+static int bcm2835_get_max_temp(struct thermal_zone_device *thermal_dev, int trip_num, unsigned long *temp)
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+{
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+ return bcm2835_get_temp_or_max(thermal_dev, temp, VC_TAG_GET_MAX_TEMP);
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+}
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static int bcm2835_get_trip_type(struct thermal_zone_device * thermal_dev, int trip_num, enum thermal_trip_type *trip_type)
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{
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--
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1.9.1
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