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| author | Jan Leupold <leupold@rsi-elektrotechnik.de> | 2015-06-17 18:21:36 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2015-06-21 14:06:15 +0100 |
| commit | 2ab5f39bc7825808e0fa1e7e5f0b23e174563467 (patch) | |
| tree | abbe3a10fcd98e1902c4deffc0aab2ad8fbe7446 /drivers | |
| parent | adfa969850ae93beca57f7527f0e4dc10cbe1309 (diff) | |
| download | linux-2ab5f39bc7825808e0fa1e7e5f0b23e174563467.tar.gz linux-2ab5f39bc7825808e0fa1e7e5f0b23e174563467.tar.bz2 linux-2ab5f39bc7825808e0fa1e7e5f0b23e174563467.zip | |
iio: adc: at91_adc: allow to use full range of startup time
The DT-Property "atmel,adc-startup-time" is stored in an u8 for a microsecond
value. When trying to increase the value of STARTUP in Register AT91_ADC_MR
some higher values can't be reached.
Change the type in function parameter and private structure field from u8 to
u32.
Signed-off-by: Jan Leupold <leupold@rsi-elektrotechnik.de>
[nicolas.ferre@atmel.com: change commit message, increase u16 to u32 for startup time]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/adc/at91_adc.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c index 8a0eb4a04fb5..7b40925dd4ff 100644 --- a/drivers/iio/adc/at91_adc.c +++ b/drivers/iio/adc/at91_adc.c @@ -182,7 +182,7 @@ struct at91_adc_caps { u8 ts_pen_detect_sensitivity; /* startup time calculate function */ - u32 (*calc_startup_ticks)(u8 startup_time, u32 adc_clk_khz); + u32 (*calc_startup_ticks)(u32 startup_time, u32 adc_clk_khz); u8 num_channels; struct at91_adc_reg_desc registers; @@ -201,7 +201,7 @@ struct at91_adc_state { u8 num_channels; void __iomem *reg_base; struct at91_adc_reg_desc *registers; - u8 startup_time; + u32 startup_time; u8 sample_hold_time; bool sleep_mode; struct iio_trigger **trig; @@ -779,7 +779,7 @@ ret: return ret; } -static u32 calc_startup_ticks_9260(u8 startup_time, u32 adc_clk_khz) +static u32 calc_startup_ticks_9260(u32 startup_time, u32 adc_clk_khz) { /* * Number of ticks needed to cover the startup time of the ADC @@ -790,7 +790,7 @@ static u32 calc_startup_ticks_9260(u8 startup_time, u32 adc_clk_khz) return round_up((startup_time * adc_clk_khz / 1000) - 1, 8) / 8; } -static u32 calc_startup_ticks_9x5(u8 startup_time, u32 adc_clk_khz) +static u32 calc_startup_ticks_9x5(u32 startup_time, u32 adc_clk_khz) { /* * For sama5d3x and at91sam9x5, the formula changes to: |