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drivers: i2s_nrfx: Generate master clock if pin is connected

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The driver uses pinctrl to configure pins instead of nrfx I2S API.
Check whether MCK pin was actually connected by pinctrl instead of
comparing nrfx_cfg.mck_pin that is always NRF_I2S_PIN_NOT_CONNECTED.

This makes it possible for nRF I2S to provide master clock even when
operating in I2S Slave mode.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
This commit is contained in:
Tomasz Moń 2024-01-18 12:27:56 +01:00 • committed by Carles Cufí
commit 76e12a33d9
1 changed files with 2 additions and 1 deletions
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3
drivers/i2s/i2s_nrfx.c
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@ -524,7 +524,8 @@ static int i2s_nrfx_configure(const struct device *dev, enum i2s_dir dir,
* the MCK output is used), find a suitable clock configuration for it.
*/
if (nrfx_cfg.mode == NRF_I2S_MODE_MASTER ||
nrfx_cfg.mck_pin != NRF_I2S_PIN_NOT_CONNECTED) {
(nrf_i2s_mck_pin_get(drv_cfg->i2s.p_reg) & I2S_PSEL_MCK_CONNECT_Msk)
== I2S_PSEL_MCK_CONNECT_Connected << I2S_PSEL_MCK_CONNECT_Pos) {
find_suitable_clock(drv_cfg, &nrfx_cfg, i2s_cfg);
/* Unless the PCLK32M source is used with the HFINT oscillator
* (which is always available without any additional actions),