nvram_spi: Make nvram_spi_read/write static.

drivers/nvram_spi/nvram-spi.c

@@ -42,6 +42,66 @@ typedef enum {
  * removed. */
 #define NVRAM_SPI_CS_TOGGLE_TICKS 1
 
+/**
+ * @brief Copy data from system memory to NVRAM.
+ *
+ * @param[in]  dev   Pointer to NVRAM device descriptor
+ * @param[in]  src   Pointer to the first byte in the system memory address space
+ * @param[in]  dst   Starting address in the NVRAM device address space
+ * @param[in]  len   Number of bytes to copy
+ *
+ * @return          Number of bytes written on success
+ * @return          <0 on errors
+ */
+static int nvram_spi_write(nvram_t *dev, uint8_t *src, uint32_t dst, size_t len);
+
+/**
+ * @brief Copy data from NVRAM to system memory.
+ *
+ * @param[in]  dev   Pointer to NVRAM device descriptor
+ * @param[out] dst   Pointer to the first byte in the system memory address space
+ * @param[in]  src   Starting address in the NVRAM device address space
+ * @param[in]  len   Number of bytes to copy
+ *
+ * @return          Number of bytes written on success
+ * @return          <0 on errors
+ */
+static int nvram_spi_read(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len);
+
+/**
+ * @brief Copy data from system memory to NVRAM.
+ *
+ * This is a special form of the WRITE command used by some Ramtron/Cypress
+ * 4Kbit FRAM devices which puts the 9th address bit inside the command byte to
+ * be able to use one byte for addressing instead of two.
+ *
+ * @param[in]  dev   Pointer to NVRAM device descriptor
+ * @param[in]  src   Pointer to the first byte in the system memory address space
+ * @param[in]  dst   Starting address in the NVRAM device address space
+ * @param[in]  len   Number of bytes to copy
+ *
+ * @return          Number of bytes written on success
+ * @return          <0 on errors
+ */
+static int nvram_spi_write_9bit_addr(nvram_t *dev, uint8_t *src, uint32_t dst, size_t len);
+
+/**
+ * @brief Copy data from NVRAM to system memory.
+ *
+ * This is a special form of the READ command used by some Ramtron/Cypress 4Kbit
+ * FRAM devices which puts the 9th address bit inside the command byte to be
+ * able to use one byte for addressing instead of two.
+ *
+ * @param[in]  dev   Pointer to NVRAM device descriptor
+ * @param[out] dst   Pointer to the first byte in the system memory address space
+ * @param[in]  src   Starting address in the NVRAM device address space
+ * @param[in]  len   Number of bytes to copy
+ *
+ * @return          Number of bytes written on success
+ * @return          <0 on errors
+ */
+static int nvram_spi_read_9bit_addr(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len);
+
 int nvram_spi_init(nvram_t *dev, nvram_spi_params_t *spi_params, size_t size)
 {
     dev->size = size;
@@ -60,7 +120,7 @@ int nvram_spi_init(nvram_t *dev, nvram_spi_params_t *spi_params, size_t size)
     return 0;
 }
 
-int nvram_spi_write(nvram_t *dev, uint32_t dst, uint8_t *src, size_t len)
+static int nvram_spi_write(nvram_t *dev, uint8_t *src, uint32_t dst, size_t len)
 {
     nvram_spi_params_t *spi_dev = (nvram_spi_params_t *) dev->extra;
     int status;
@@ -107,7 +167,7 @@ int nvram_spi_write(nvram_t *dev, uint32_t dst, uint8_t *src, size_t len)
     return status;
 }
 
-int nvram_spi_read(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len)
+static int nvram_spi_read(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len)
 {
     nvram_spi_params_t *spi_dev = (nvram_spi_params_t *) dev->extra;
     int status;
@@ -145,7 +205,7 @@ int nvram_spi_read(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len)
 }
 
 
-int nvram_spi_write_9bit_addr(nvram_t *dev, uint32_t dst, uint8_t *src, size_t len)
+static int nvram_spi_write_9bit_addr(nvram_t *dev, uint8_t *src, uint32_t dst, size_t len)
 {
     nvram_spi_params_t *spi_dev = (nvram_spi_params_t *) dev->extra;
     int status;
@@ -188,7 +248,7 @@ int nvram_spi_write_9bit_addr(nvram_t *dev, uint32_t dst, uint8_t *src, size_t l
     return status;
 }
 
-int nvram_spi_read_9bit_addr(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len)
+static int nvram_spi_read_9bit_addr(nvram_t *dev, uint8_t *dst, uint32_t src, size_t len)
 {
     nvram_spi_params_t *spi_dev = (nvram_spi_params_t *) dev->extra;
     int status;