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| author | David Heidelberg <david@ixit.cz> | 2020-03-29 18:15:45 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2020-05-10 18:23:50 +0200 |
| commit | fa7cc725a343e305bef78e8d65be48f37d3f7720 (patch) | |
| tree | dabc90406524e243a294f357c6cbedbec80fae00 /drivers/power | |
| parent | power: supply: smb347-charger: IRQSTAT_D is volatile (diff) | |
| download | linux-fa7cc725a343e305bef78e8d65be48f37d3f7720.tar.xz linux-fa7cc725a343e305bef78e8d65be48f37d3f7720.zip | |
power: supply: smb347-charger: Add delay before getting IRQSTAT
This delay-fix is picked up from downstream driver,
we measured that 25 - 35 ms delay ensure that we get required data.
Tested on SMB347 on Nexus 7 2012. Otherwise IRQSTAT_E fails to provide
correct information.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/supply/smb347-charger.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/power/supply/smb347-charger.c b/drivers/power/supply/smb347-charger.c index d102921b3ab2..f99026d81f2a 100644 --- a/drivers/power/supply/smb347-charger.c +++ b/drivers/power/supply/smb347-charger.c @@ -8,6 +8,7 @@ * Mika Westerberg <mika.westerberg@linux.intel.com> */ +#include <linux/delay.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/kernel.h> @@ -708,6 +709,9 @@ static irqreturn_t smb347_interrupt(int irq, void *data) bool handled = false; int ret; + /* SMB347 it needs at least 20ms for setting IRQSTAT_E_*IN_UV_IRQ */ + usleep_range(25000, 35000); + ret = regmap_read(smb->regmap, STAT_C, &stat_c); if (ret < 0) { dev_warn(smb->dev, "reading STAT_C failed\n"); |