1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/sensors/pmw3389.c b/drivers/sensors/pmw3389.c
index d6f02b6a59..963925bd38 100644
--- a/drivers/sensors/pmw3389.c
+++ b/drivers/sensors/pmw3389.c
@@ -210,14 +210,12 @@ void pmw3389_upload_firmware(void) {
     spi_write(REG_SROM_Load_Burst | 0x80);
     wait_us(15);
 
-    // legacy only for PMW3389 spi_transmit failed to load firmware
-    unsigned char c;
-    for (int i = 0; i < FIRMWARE_LENGTH; i++) {
-        c = (unsigned char)pgm_read_byte(firmware_data + i);
-        spi_write(c);
+    for (uint16_t i = 0; i < FIRMWARE_LENGTH; i++) {
+        spi_write(pgm_read_byte(firmware_data + i));
+#ifndef PMW3389_FIRMWARE_UPLOAD_FAST
         wait_us(15);
+#endif
     }
-
     wait_us(200);
 
     pmw3389_read(REG_SROM_ID);