[PATCH 1/2] staging: fbtft: fb_ra8875: prefer usleep_range over udelay
From: Georgii Druzhinin <hidden>
Date: 2026-06-07 20:17:23
Also in:
dri-devel, linux-staging, lkml
Subsystem:
fbtft framebuffer drivers, staging subsystem, the rest · Maintainers:
Andy Shevchenko, Greg Kroah-Hartman, Linus Torvalds
Replace udelay(100) with usleep_range(100, 120) to avoid busy-waiting and allow the scheduler to utilize the CPU during the delay. Signed-off-by: Georgii Druzhinin <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 0ab1de6647d0..6058934e2ca2 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, 120); 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, 120); } static int write_vmem16_bus8(struct fbtft_par *par, size_t offset, size_t len)
--
2.54.0