[incubator-nuttx] 05/05: risc-v/esp32c3: Implement MTDIOC_ERASESTATE for SPI Flash driver

[xiaoxiang]

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commit c05feda208efe6c88797a8821f15a93393cb87ea
Author: Gustavo Henrique Nihei <gustavo.ni...@espressif.com>
AuthorDate: Fri Jul 16 14:21:57 2021 -0300

    risc-v/esp32c3: Implement MTDIOC_ERASESTATE for SPI Flash driver
    
    Signed-off-by: Gustavo Henrique Nihei <gustavo.ni...@espressif.com>
---
 arch/risc-v/src/esp32c3/esp32c3_spiflash.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/risc-v/src/esp32c3/esp32c3_spiflash.c 
b/arch/risc-v/src/esp32c3/esp32c3_spiflash.c
index ecd9ad8..24b48a1 100644
--- a/arch/risc-v/src/esp32c3/esp32c3_spiflash.c
+++ b/arch/risc-v/src/esp32c3/esp32c3_spiflash.c
@@ -74,6 +74,7 @@
 
 #define SPI_FLASH_BLK_SIZE          256
 #define SPI_FLASH_ERASE_SIZE        4096
+#define SPI_FLASH_ERASED_STATE      (0xff)
 #define SPI_FLASH_SIZE              (4 * 1024 * 1024)
 
 #define ESP32C3_MTD_OFFSET          CONFIG_ESP32C3_MTD_OFFSET
@@ -875,6 +876,15 @@ static int esp32c3_ioctl(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;