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drivers: pwm: nRF5x: Use TIMER2 and PPI indices 14-19

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As the nRF5x BLE controller uses TIMER1, TIMER2 and PPI
indices 0-13 (and 14-15, if PA/LNA feature is enabled),
the software based PWM driver needing 6 PPI channels has
to use PPI indices outside the BLE controller used range.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2017-11-22 05:40:26 +01:00 • committed by Anas Nashif
commit c983f670f6
1 changed files with 11 additions and 2 deletions
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13
drivers/pwm/pwm_nrf5_sw.c
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@ -204,10 +204,19 @@ static int pwm_nrf5_sw_init(struct device *dev)
} }
#define PWM_0_MAP_SIZE 3 #define PWM_0_MAP_SIZE 3
/* NOTE: nRF51x BLE controller use HW tIFS hence using only PPI channels 0-6.
* nRF52x BLE controller implements SW tIFS and uses addition 6 PPI channels.
* Also, nRF52x requires one additional PPI channel for decryption rate boost.
* Hence, nRF52x BLE controller uses PPI channels 0-13.
*
* NOTE: If PA/LNA feature is enabled for nRF52x, then additional two PPI
* channels 14-15 are used by BLE controller.
*/
/* FIXME: For nRF51, use .timer = NRF_TIMER1, .ppi_base = 7 */
static const struct pwm_config pwm_nrf5_sw_0_config = { static const struct pwm_config pwm_nrf5_sw_0_config = {
.timer = NRF_TIMER1, .timer = NRF_TIMER2,
.gpiote_base = 0, .gpiote_base = 0,
.ppi_base = 8, .ppi_base = 14,
.map_size = PWM_0_MAP_SIZE, .map_size = PWM_0_MAP_SIZE,
}; };