From 0e2af43fc6d7677979e19bf1a42bfcd167a21b9c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andrzej=20G=C5=82=C4=85bek?= <andrzej.glabek@nordicsemi.no>
Date: Tue, 1 Mar 2022 17:01:44 +0100
Subject: [PATCH] drivers: pinctrl: nrf: Add support for I2S and PDM
 peripherals
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Add support for configuring pins of the nRF I2S and PDM peripherals.

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
---
 drivers/pinctrl/pinctrl_nrf.c             | 62 +++++++++++++++++++++++
 include/dt-bindings/pinctrl/nrf-pinctrl.h | 18 +++++++
 2 files changed, 80 insertions(+)

diff --git a/drivers/pinctrl/pinctrl_nrf.c b/drivers/pinctrl/pinctrl_nrf.c
index a8427954eef..4af8019c88f 100644
--- a/drivers/pinctrl/pinctrl_nrf.c
+++ b/drivers/pinctrl/pinctrl_nrf.c
@@ -53,6 +53,14 @@ BUILD_ASSERT(((NRF_DRIVE_S0S1 == NRF_GPIO_PIN_S0S1) &&
 #define NRF_PSEL_TWIM(reg, line) ((NRF_TWIM_Type *)reg)->PSEL.line
 #endif
 
+#if DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_i2s)
+#define NRF_PSEL_I2S(reg, line) ((NRF_I2S_Type *)reg)->PSEL.line
+#endif
+
+#if DT_HAS_COMPAT_STATUS_OKAY(nordic_nrf_pdm)
+#define NRF_PSEL_PDM(reg, line) ((NRF_PDM_Type *)reg)->PSEL.line
+#endif
+
 /**
  * @brief Configure pin settings.
  *
@@ -156,6 +164,60 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt,
 					  NRF_GPIO_PIN_INPUT_CONNECT);
 			break;
 #endif /* defined(NRF_PSEL_TWIM) */
+#if defined(NRF_PSEL_I2S)
+		case NRF_FUN_I2S_SCK_M:
+			NRF_PSEL_I2S(reg, SCK) = NRF_GET_PIN(pins[i]);
+			nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 0);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
+					  NRF_GPIO_PIN_INPUT_DISCONNECT);
+			break;
+		case NRF_FUN_I2S_SCK_S:
+			NRF_PSEL_I2S(reg, SCK) = NRF_GET_PIN(pins[i]);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_INPUT,
+					  NRF_GPIO_PIN_INPUT_CONNECT);
+			break;
+		case NRF_FUN_I2S_LRCK_M:
+			NRF_PSEL_I2S(reg, LRCK) = NRF_GET_PIN(pins[i]);
+			nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 0);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
+					  NRF_GPIO_PIN_INPUT_DISCONNECT);
+			break;
+		case NRF_FUN_I2S_LRCK_S:
+			NRF_PSEL_I2S(reg, LRCK) = NRF_GET_PIN(pins[i]);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_INPUT,
+					  NRF_GPIO_PIN_INPUT_CONNECT);
+			break;
+		case NRF_FUN_I2S_SDIN:
+			NRF_PSEL_I2S(reg, SDIN) = NRF_GET_PIN(pins[i]);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_INPUT,
+					  NRF_GPIO_PIN_INPUT_CONNECT);
+			break;
+		case NRF_FUN_I2S_SDOUT:
+			NRF_PSEL_I2S(reg, SDOUT) = NRF_GET_PIN(pins[i]);
+			nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 0);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
+					  NRF_GPIO_PIN_INPUT_DISCONNECT);
+			break;
+		case NRF_FUN_I2S_MCK:
+			NRF_PSEL_I2S(reg, MCK) = NRF_GET_PIN(pins[i]);
+			nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 0);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
+					  NRF_GPIO_PIN_INPUT_DISCONNECT);
+			break;
+#endif /* defined(NRF_PSEL_I2S) */
+#if defined(NRF_PSEL_PDM)
+		case NRF_FUN_PDM_CLK:
+			NRF_PSEL_PDM(reg, CLK) = NRF_GET_PIN(pins[i]);
+			nrf_gpio_pin_write(NRF_GET_PIN(pins[i]), 0);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_OUTPUT,
+					  NRF_GPIO_PIN_INPUT_DISCONNECT);
+			break;
+		case NRF_FUN_PDM_DIN:
+			NRF_PSEL_PDM(reg, DIN) = NRF_GET_PIN(pins[i]);
+			nrf_pin_configure(pins[i], NRF_GPIO_PIN_DIR_INPUT,
+					  NRF_GPIO_PIN_INPUT_CONNECT);
+			break;
+#endif /* defined(NRF_PSEL_PDM) */
 		default:
 			return -ENOTSUP;
 		}
diff --git a/include/dt-bindings/pinctrl/nrf-pinctrl.h b/include/dt-bindings/pinctrl/nrf-pinctrl.h
index b24e97a7358..55f76a63ec8 100644
--- a/include/dt-bindings/pinctrl/nrf-pinctrl.h
+++ b/include/dt-bindings/pinctrl/nrf-pinctrl.h
@@ -77,6 +77,24 @@
 #define NRF_FUN_TWIM_SCL 11U
 /** TWI master SDA */
 #define NRF_FUN_TWIM_SDA 12U
+/** I2S SCK in master mode */
+#define NRF_FUN_I2S_SCK_M 13U
+/** I2S SCK in slave mode */
+#define NRF_FUN_I2S_SCK_S 14U
+/** I2S LRCK in master mode */
+#define NRF_FUN_I2S_LRCK_M 15U
+/** I2S LRCK in slave mode */
+#define NRF_FUN_I2S_LRCK_S 16U
+/** I2S SDIN */
+#define NRF_FUN_I2S_SDIN 17U
+/** I2S SDOUT */
+#define NRF_FUN_I2S_SDOUT 18U
+/** I2S MCK */
+#define NRF_FUN_I2S_MCK 19U
+/** PDM CLK */
+#define NRF_FUN_PDM_CLK 20U
+/** PDM DIN */
+#define NRF_FUN_PDM_DIN 21U
 
 /** @} */