diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/timer.h | 34 | ||||
| -rw-r--r-- | src/soc/mediatek/mt8183/auxadc.c | 22 |
2 files changed, 37 insertions, 19 deletions
diff --git a/src/include/timer.h b/src/include/timer.h index 49eae5ec40..d3afb19646 100644 --- a/src/include/timer.h +++ b/src/include/timer.h @@ -15,6 +15,8 @@ #ifndef TIMER_H #define TIMER_H +#include <types.h> + #define NSECS_PER_SEC 1000000000 #define USECS_PER_SEC 1000000 #define MSECS_PER_SEC 1000 @@ -195,4 +197,36 @@ static inline long stopwatch_duration_msecs(struct stopwatch *sw) return stopwatch_duration_usecs(sw) / USECS_PER_MSEC; } +/* + * Helper macro to wait until a condition becomes true or a timeout elapses. + * + * condition: a C expression to wait for + * timeout: timeout, in microseconds + * + * Returns: + * 0 if the condition still evaluates to false after the timeout elapsed, + * >0 if the condition evaluates to true. The return value is the amount of + * microseconds waited (at least 1). + */ +#define wait_us(timeout_us, condition) \ +({ \ + long __ret = 0; \ + struct stopwatch __sw; \ + stopwatch_init_usecs_expire(&__sw, timeout_us); \ + do { \ + if (condition) { \ + stopwatch_tick(&__sw); \ + __ret = stopwatch_duration_usecs(&__sw); \ + if (!__ret) /* make sure it evaluates to true */\ + __ret = 1; \ + break; \ + } \ + } while (!stopwatch_expired(&__sw)); \ + __ret; \ +}) + +#define wait_ms(timeout_ms, condition) \ + DIV_ROUND_UP(wait_us((timeout_ms) * USECS_PER_MSEC, condition), \ + USECS_PER_MSEC) + #endif /* TIMER_H */ diff --git a/src/soc/mediatek/mt8183/auxadc.c b/src/soc/mediatek/mt8183/auxadc.c index af88efb3b9..87574ba791 100644 --- a/src/soc/mediatek/mt8183/auxadc.c +++ b/src/soc/mediatek/mt8183/auxadc.c @@ -24,33 +24,17 @@ static struct mtk_auxadc_regs *const mtk_auxadc = (void *)AUXADC_BASE; -/* - * Wait until a condition becomes true or times out - * - * cond : a C expression to wait for - * timeout : msecs - */ -#define wait_ms(cond, timeout) \ -({ \ - struct stopwatch sw; \ - int expired = 0; \ - stopwatch_init_msecs_expire(&sw, timeout); \ - while (!(cond) && !(expired = stopwatch_expired(&sw))) \ - ; /* wait */ \ - assert(!expired); \ -}) - static uint32_t auxadc_get_rawdata(int channel) { setbits_le32(&mt8183_infracfg->module_sw_cg_1_clr, 1 << 10); - wait_ms(!(read32(&mtk_auxadc->con2) & 0x1), 300); + assert(wait_ms(300, !(read32(&mtk_auxadc->con2) & 0x1))); clrbits_le32(&mtk_auxadc->con1, 1 << channel); - wait_ms(!(read32(&mtk_auxadc->data[channel]) & (1 << 12)), 300); + assert(wait_ms(300, !(read32(&mtk_auxadc->data[channel]) & (1 << 12)))); setbits_le32(&mtk_auxadc->con1, 1 << channel); udelay(25); - wait_ms(read32(&mtk_auxadc->data[channel]) & (1 << 12), 300); + assert(wait_ms(300, read32(&mtk_auxadc->data[channel]) & (1 << 12))); uint32_t value = read32(&mtk_auxadc->data[channel]) & 0x0FFF; |