From ec7c3ac12dbc355218bae9c392e96b8d513fb95d Mon Sep 17 00:00:00 2001
From: Drashna Jaelre <drashna@live.com>
Date: Mon, 10 Jan 2022 14:57:36 -0800
Subject: Optimize initialization of PMW3360 Sensor (#15821)

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

(limited to 'drivers/sensors')

diff --git a/drivers/sensors/pmw3360.c b/drivers/sensors/pmw3360.c
index ad0a724ee4..4712f6015c 100644
--- a/drivers/sensors/pmw3360.c
+++ b/drivers/sensors/pmw3360.c
@@ -209,12 +209,16 @@ 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);
         wait_us(15);
     }
+#else
+    spi_transmit(firmware_data, sizeof(firmware_data));
+#endif
     wait_us(200);
 
     pmw3360_read(REG_SROM_ID);
-- 
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