diff options
Diffstat (limited to 'src/soc/rockchip/rk3399/saradc.c')
| -rw-r--r-- | src/soc/rockchip/rk3399/saradc.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/src/soc/rockchip/rk3399/saradc.c b/src/soc/rockchip/rk3399/saradc.c index d70c9667fc..7c25936e20 100644 --- a/src/soc/rockchip/rk3399/saradc.c +++ b/src/soc/rockchip/rk3399/saradc.c @@ -46,20 +46,12 @@ struct rk3399_saradc_regs *rk3399_saradc = (void *)SARADC_BASE; /* SARADC_DATA, 10[0:9] bits */ #define DATA_MASK 0x3FF -/* The max clk is 13 MHz, we also recommended that - * the sample rate(=clk/13) should be > 500KHz. - * So choose 8MHz, that 8MHz/13 = 615.38KHz > 500KHz. - */ -#define SARADC_HZ (8*MHz) - -/* TRM(V0.3 Part 1 Page 366) said there is a delay between - * power up and start command, default value is 2 src clk. - * Let delay 2 src clk here, in ns(udelay). - */ -#define SARADC_DELAY_PU (1 * 1000 * 1000 * 1000 / SARADC_HZ * 2) +#define SARADC_HZ (4*MHz) #define SARADC_MAX_CHANNEL 6 +#define SARADC_DELAY_PU (1 * 1000 * 1000 * 1000 / SARADC_HZ * 4) + u32 get_saradc_value(u32 chn) { u32 adc_value; |