[incubator-nuttx] 02/05: xtensa/esp32: Implement MTDIOC_ERASESTATE for SPI Flash driver

[xiaoxiang]

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commit df2e890cfcd3bd326e268396b42c4b4f827db72a
Author: Gustavo Henrique Nihei <gustavo.ni...@espressif.com>
AuthorDate: Tue Jul 13 19:33:56 2021 -0300

    xtensa/esp32: Implement MTDIOC_ERASESTATE for SPI Flash driver
    
    Signed-off-by: Gustavo Henrique Nihei <gustavo.ni...@espressif.com>
---
 arch/xtensa/src/esp32/esp32_spiflash.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/xtensa/src/esp32/esp32_spiflash.c 
b/arch/xtensa/src/esp32/esp32_spiflash.c
index 571e067..5da7893 100644
--- a/arch/xtensa/src/esp32/esp32_spiflash.c
+++ b/arch/xtensa/src/esp32/esp32_spiflash.c
@@ -69,6 +69,7 @@
 
 #define SPI_FLASH_ENCRYPT_UNIT_SIZE (32)
 #define SPI_FLASH_ENCRYPT_WORDS     (32 / 4)
+#define SPI_FLASH_ERASED_STATE      (0xff)
 
 #define ESP32_MTD_OFFSET            CONFIG_ESP32_MTD_OFFSET
 #define ESP32_MTD_SIZE              CONFIG_ESP32_MTD_SIZE
@@ -1933,6 +1934,15 @@ static int esp32_ioctl(FAR struct mtd_dev_s *dev, int 
cmd,
         }
         break;
 
+      case MTDIOC_ERASESTATE:
+        {
+          FAR uint8_t *result = (FAR uint8_t *)arg;
+          *result = SPI_FLASH_ERASED_STATE;
+
+          ret = OK;
+        }
+        break;
+
       default:
         ret = -ENOTTY;
         break;