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spi slave: lock APB frequency while driver is in use

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This commit is contained in:
Ivan Grokhotkov 2017-09-24 15:05:35 +08:00
parent e4616588b7
commit 5048d38ce7
1 changed files with 23 additions and 0 deletions
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23
components/driver/spi_slave.c
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@ -26,6 +26,7 @@
#include "esp_intr_alloc.h"
#include "esp_log.h"
#include "esp_err.h"
#include "esp_pm.h"
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "freertos/xtensa_api.h"
@ -60,6 +61,9 @@ typedef struct {
QueueHandle_t trans_queue;
QueueHandle_t ret_queue;
int dma_chan;
#ifdef CONFIG_PM_ENABLE
esp_pm_lock_handle_t pm_lock;
#endif
} spi_slave_t;
static spi_slave_t *spihost[3];
@ -106,6 +110,15 @@ esp_err_t spi_slave_initialize(spi_host_device_t host, const spi_bus_config_t *b
//We're limited to non-DMA transfers: the SPI work registers can hold 64 bytes at most.
spihost[host]->max_transfer_sz = 16 * 4;
}
#ifdef CONFIG_PM_ENABLE
esp_err_t err = esp_pm_lock_create(ESP_PM_APB_FREQ_MAX, 0, "spi_slave",
&spihost[host]->pm_lock);
if (err != ESP_OK) {
goto nomem;
}
// Lock APB frequency while SPI slave driver is in use
esp_pm_lock_acquire(spihost[host]->pm_lock);
#endif //CONFIG_PM_ENABLE
//Create queues
spihost[host]->trans_queue = xQueueCreate(slave_config->queue_size, sizeof(spi_slave_transaction_t *));
@ -184,6 +197,12 @@ nomem:
if (spihost[host]->ret_queue) vQueueDelete(spihost[host]->ret_queue);
free(spihost[host]->dmadesc_tx);
free(spihost[host]->dmadesc_rx);
#ifdef CONFIG_PM_ENABLE
if (spihost[host]->pm_lock) {
esp_pm_lock_release(spihost[host]->pm_lock);
esp_pm_lock_delete(spihost[host]->pm_lock);
}
#endif
}
free(spihost[host]);
spihost[host] = NULL;
@ -203,6 +222,10 @@ esp_err_t spi_slave_free(spi_host_device_t host)
}
free(spihost[host]->dmadesc_tx);
free(spihost[host]->dmadesc_rx);
#ifdef CONFIG_PM_ENABLE
esp_pm_lock_release(spihost[host]->pm_lock);
esp_pm_lock_delete(spihost[host]->pm_lock);
#endif //CONFIG_PM_ENABLE
free(spihost[host]);
spihost[host] = NULL;
spicommon_periph_free(host);