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as3525v2: disable interrupts when writing to the PMU registers

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Brightness changes on the Fuzev2 now work flawlessly
This might also explain why my Clip+ would sometimes "not boot", that
could have been because the backlight was not enabled at all.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25445 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-04-03 04:42:04 +00:00
parent cfd245e527
commit d3bad5b1ca
1 changed files with 5 additions and 0 deletions
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5
firmware/target/arm/as3525/ascodec-target.h
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@ -30,6 +30,7 @@
#include "as3514.h"
#include "kernel.h" /* for struct wakeup */
#include "clock-target.h" /* for AS3525_I2C_PRESCALER */
#include "system-arm.h"
/* Charge Pump and Power management Settings */
#define AS314_CP_DCDC3_SETTING \
@ -77,8 +78,12 @@ int ascodec_write(unsigned int index, unsigned int value);
static inline void ascodec_write_pmu(unsigned int index, unsigned int subreg,
unsigned int value)
{
/* we disable interrupts to make sure no operation happen on the i2c bus
* between selecting the sub register and writing to it */
int oldstatus = disable_irq_save();
ascodec_write(AS3543_PMU_ENABLE, 8|subreg);
ascodec_write(index, value);
restore_irq(oldstatus);
}
#endif