From: Anas Iqbal <mohd.abd.6602@gmail.com>
To: andy@kernel.org, gregkh@linuxfoundation.org
Cc: linux-staging@lists.linux.dev, dri-devel@lists.freedesktop.org,
linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Anas Iqbal <mohd.abd.6602@gmail.com>
Subject: [PATCH] staging: fbtft: fb_tinylcd: replace udelay() with usleep_range()
Date: Wed, 11 Mar 2026 14:24:07 +0000 [thread overview]
Message-ID: <20260311142407.35403-1-mohd.abd.6602@gmail.com> (raw)
Replace udelay() with usleep_range() for a 250 microsecond delay
as recommended by checkpatch.pl. usleep_range() avoids busy
waiting and allows the scheduler to schedule other tasks.
Signed-off-by: Anas Iqbal <mohd.abd.6602@gmail.com>
---
drivers/staging/fbtft/fb_tinylcd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/fbtft/fb_tinylcd.c b/drivers/staging/fbtft/fb_tinylcd.c
index 9469248f2c50..51e6493b050f 100644
--- a/drivers/staging/fbtft/fb_tinylcd.c
+++ b/drivers/staging/fbtft/fb_tinylcd.c
@@ -38,10 +38,10 @@ static int init_display(struct fbtft_par *par)
write_reg(par, 0xE5, 0x00);
write_reg(par, 0xF0, 0x36, 0xA5, 0x53);
write_reg(par, 0xE0, 0x00, 0x35, 0x33, 0x00, 0x00, 0x00,
- 0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
+ 0x00, 0x35, 0x33, 0x00, 0x00, 0x00);
write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, 0x55);
write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
- udelay(250);
+ usleep_range(250, 500);
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
return 0;
--
2.43.0
next reply other threads:[~2026-03-11 14:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 14:24 Anas Iqbal [this message]
2026-03-11 14:48 ` [PATCH] staging: fbtft: fb_tinylcd: replace udelay() with usleep_range() Dan Carpenter
2026-03-11 14:56 ` Greg KH
2026-03-11 16:01 ` Andy Shevchenko
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