svn commit: r310886 - head/sys/arm/ti/am335x
Luiz Otavio O Souza
loos at FreeBSD.org
Sat Dec 31 02:18:09 UTC 2016
Author: loos
Date: Sat Dec 31 02:18:08 2016
New Revision: 310886
URL: https://svnweb.freebsd.org/changeset/base/310886
Log:
Fixes the sensor initialization, always reset the digital outputs to start.
Obtained from: pfSense
MFC after: 3 days
Sponsored by: Rubicon Communications, LLC (Netgate)
Modified:
head/sys/arm/ti/am335x/am335x_scm.c
Modified: head/sys/arm/ti/am335x/am335x_scm.c
==============================================================================
--- head/sys/arm/ti/am335x/am335x_scm.c Sat Dec 31 02:02:42 2016 (r310885)
+++ head/sys/arm/ti/am335x/am335x_scm.c Sat Dec 31 02:18:08 2016 (r310886)
@@ -110,11 +110,14 @@ am335x_scm_attach(device_t dev)
struct sysctl_oid_list *tree;
uint32_t reg;
- /* Set ADC to continous mode, clear output reset. */
- reg = SCM_BGAP_CLRZ | SCM_BGAP_CONTCONV;
- ti_scm_reg_write_4(SCM_BGAP_CTRL, reg);
- /* Flush write. */
+ /* Reset the digital outputs. */
+ ti_scm_reg_write_4(SCM_BGAP_CTRL, 0);
+ ti_scm_reg_read_4(SCM_BGAP_CTRL, ®);
+ DELAY(500);
+ /* Set continous mode. */
+ ti_scm_reg_write_4(SCM_BGAP_CTRL, SCM_BGAP_CONTCONV);
ti_scm_reg_read_4(SCM_BGAP_CTRL, ®);
+ DELAY(500);
/* Start the ADC conversion. */
reg = SCM_BGAP_CLRZ | SCM_BGAP_CONTCONV | SCM_BGAP_SOC;
ti_scm_reg_write_4(SCM_BGAP_CTRL, reg);
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