From: Selby Mashiki <redacted>

udelay() busy-waits for the specified duration, consuming CPU cycles
unnecessarily. usleep_range() is preferred for delays that can sleep,
as it allows the scheduler to run other tasks during the wait.

Replace two instances of udelay(100) with usleep_range(100, 200) to
use the preferred sleeping delay function.

Signed-off-by: Selby Mashiki <redacted>
---
 drivers/staging/fbtft/fb_ra8875.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/fbtft/fb_ra8875.c b/drivers/staging/fbtft/fb_ra8875.c
index 0ab1de664..d2400bb44 100644
--- a/drivers/staging/fbtft/fb_ra8875.c
+++ b/drivers/staging/fbtft/fb_ra8875.c

@@ -210,7 +210,7 @@ static void write_reg8_bus8(struct fbtft_par *par, int len, ...)
 	}
 	len--;
 
-	udelay(100);
+	usleep_range(100, 200);
 
 	if (len) {
 		buf = (u8 *)par->buf;

@@ -231,7 +231,7 @@ static void write_reg8_bus8(struct fbtft_par *par, int len, ...)
 
 	/* restore user spi-speed */
 	par->fbtftops.write = fbtft_write_spi;
-	udelay(100);
+	usleep_range(100, 200);
 }
 
 static int write_vmem16_bus8(struct fbtft_par *par, size_t offset, size_t len)

---
base-commit: 64276d9bfe4d1fdd5cf2636f1065f7ea55c2defb
change-id: 20260716-staging-testing-b1b81d63d0d1

Best regards,
--  
Selby Mashiki [off-list ref]