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arch: cxd56xx: Fix gnss open error by clock change

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If the system clock is changed during loading gnssfw, gnss open may be
failed. So this commit prohibits clock change until loading gnssfw is
completed.
This commit is contained in:
SPRESENSE 2021-05-19 17:04:22 +09:00 committed by Alin Jerpelea
parent e26da5f564
commit 98871e58af
1 changed files with 14 additions and 0 deletions
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14
arch/arm/src/cxd56xx/cxd56_gnss.c
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@ -389,6 +389,11 @@ static struct pm_cpu_freqlock_s g_lv_lock =
PM_CPUFREQLOCK_INIT(PM_CPUFREQLOCK_TAG('G', 'T', 0),
PM_CPUFREQLOCK_FLAG_LV);
/* Lock to prohibit clock change in gnss open */
static struct pm_cpu_freqlock_s g_hold_lock =
PM_CPUFREQLOCK_INIT(0, PM_CPUFREQLOCK_FLAG_HOLD);
/****************************************************************************
* Private Functions
****************************************************************************/
@ -2632,7 +2637,16 @@ static int cxd56_gnss_open(FAR struct file *filep)
nxsem_set_protocol(&priv->syncsem, SEM_PRIO_NONE);
/* Prohibit the clock change during loading image */
up_pm_acquire_freqlock(&g_hold_lock);
ret = fw_pm_loadimage(CXD56_GNSS_GPS_CPUID, CXD56_GNSS_FWNAME);
/* Allow the clock change after loading image */
up_pm_release_freqlock(&g_hold_lock);
if (ret < 0)
{
goto _err1;