From 6ebb44f17e7bb3df8492c6498289a44c01c59277 Mon Sep 17 00:00:00 2001
From: Drashna Jaelre <drashna@live.com>
Date: Thu, 20 Jan 2022 09:23:16 -0800
Subject: [Bug][Core] Fix optical sensor firmware upload (#15919)

---
 drivers/sensors/pmw3360.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

(limited to 'drivers/sensors/pmw3360.c')

diff --git a/drivers/sensors/pmw3360.c b/drivers/sensors/pmw3360.c
index 0dac600cc2..8d1b08e22b 100644
--- a/drivers/sensors/pmw3360.c
+++ b/drivers/sensors/pmw3360.c
@@ -206,16 +206,12 @@ void pmw3360_upload_firmware(void) {
     spi_write(REG_SROM_Load_Burst | 0x80);
     wait_us(15);
 
-#ifdef PMW3360_LEGACY_FIRMWARE_UPLOAD
-    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 PMW3360_FIRMWARE_UPLOAD_FAST
         wait_us(15);
-    }
-#else
-    spi_transmit(firmware_data, sizeof(firmware_data));
 #endif
+    }
     wait_us(200);
 
     pmw3360_read(REG_SROM_ID);
-- 
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