drivers: flash: nrf_qspi_nor: Add support for device power management
Deinitialize the nrfx_qspi driver for periods when the device
is suspended. For flash chips with "has-dpd" property set, when
suspending/resuming the device, issue also the enter/exit Deep
Power-down Mode command, respectively.
Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
diff --git a/drivers/flash/nrf_qspi_nor.c b/drivers/flash/nrf_qspi_nor.c
index e6ce773..18aa211 100644
--- a/drivers/flash/nrf_qspi_nor.c
+++ b/drivers/flash/nrf_qspi_nor.c
@@ -1034,6 +1034,110 @@
#endif /* CONFIG_FLASH_JESD216_API */
};
+#ifdef CONFIG_PM_DEVICE
+static int enter_dpd(const struct device *const dev)
+{
+ if (IS_ENABLED(DT_INST_PROP(0, has_dpd))) {
+ struct qspi_cmd cmd = {
+ .op_code = SPI_NOR_CMD_DPD,
+ };
+ uint32_t t_enter_dpd = DT_INST_PROP_OR(0, t_enter_dpd, 0);
+ int ret;
+
+ ret = qspi_send_cmd(dev, &cmd, false);
+ if (ret < 0) {
+ return ret;
+ }
+
+ if (t_enter_dpd) {
+ uint32_t t_enter_dpd_us =
+ ceiling_fraction(t_enter_dpd, NSEC_PER_USEC);
+
+ k_busy_wait(t_enter_dpd_us);
+ }
+ }
+
+ return 0;
+}
+
+static int exit_dpd(const struct device *const dev)
+{
+ if (IS_ENABLED(DT_INST_PROP(0, has_dpd))) {
+ struct qspi_cmd cmd = {
+ .op_code = SPI_NOR_CMD_RDPD,
+ };
+ uint32_t t_exit_dpd = DT_INST_PROP_OR(0, t_exit_dpd, 0);
+ int ret;
+
+ ret = qspi_send_cmd(dev, &cmd, false);
+ if (ret < 0) {
+ return ret;
+ }
+
+ if (t_exit_dpd) {
+ uint32_t t_exit_dpd_us =
+ ceiling_fraction(t_exit_dpd, NSEC_PER_USEC);
+
+ k_busy_wait(t_exit_dpd_us);
+ }
+ }
+
+ return 0;
+}
+
+static int qspi_nor_pm_action(const struct device *dev,
+ enum pm_device_action action)
+{
+ struct qspi_nor_data *dev_data = dev->data;
+ const struct qspi_nor_config *dev_config = dev->config;
+ int ret;
+ nrfx_err_t err;
+
+ switch (action) {
+ case PM_DEVICE_ACTION_SUSPEND:
+ ret = ANOMALY_122_INIT(dev);
+ if (ret < 0) {
+ return ret;
+ }
+
+ if (nrfx_qspi_mem_busy_check() != NRFX_SUCCESS) {
+ return -EBUSY;
+ }
+
+ ret = enter_dpd(dev);
+ if (ret < 0) {
+ return ret;
+ }
+
+ nrfx_qspi_uninit();
+ break;
+
+ case PM_DEVICE_ACTION_RESUME:
+ err = nrfx_qspi_init(&dev_config->nrfx_cfg,
+ qspi_handler,
+ dev_data);
+ if (err != NRFX_SUCCESS) {
+ return -EIO;
+ }
+
+ ret = exit_dpd(dev);
+ if (ret < 0) {
+ return ret;
+ }
+
+ ANOMALY_122_UNINIT(dev);
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+ return 0;
+}
+#else
+#define qspi_nor_pm_action NULL
+#endif /* CONFIG_PM_DEVICE */
+
static struct qspi_nor_data qspi_nor_dev_data = {
#ifdef CONFIG_MULTITHREADING
.trans = Z_SEM_INITIALIZER(qspi_nor_dev_data.trans, 1, 1),
@@ -1087,7 +1191,7 @@
.id = DT_INST_PROP(0, jedec_id),
};
-DEVICE_DT_INST_DEFINE(0, qspi_nor_init, NULL,
+DEVICE_DT_INST_DEFINE(0, qspi_nor_init, qspi_nor_pm_action,
&qspi_nor_dev_data, &qspi_nor_dev_config,
POST_KERNEL, CONFIG_NORDIC_QSPI_NOR_INIT_PRIORITY,
&qspi_nor_api);
