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Wed, 16 Sep 2026 02:39:38 -0700 (PDT) Received: from omermac ([82.222.238.173]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49e83da9a7csm61728415e9.11.2026.09.16.02.39.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 02:39:38 -0700 (PDT) From: Omer PALA To: andy@kernel.org, gregkh@linuxfoundation.org Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] staging: fbtft: fb_upd161704: replace udelay with usleep_range Date: Wed, 16 Sep 2026 12:39:28 +0300 Message-ID: <20260916093928.52057-1-palaomer100@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Replace udelay() calls with usleep_range() to avoid busy-waiting and allow the scheduler to sleep during delays. Signed-off-by: Omer PALA --- drivers/staging/fbtft/fb_upd161704.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/drivers/staging/fbtft/fb_upd161704.c b/drivers/staging/fbtft/fb_upd161704.c index 7288140e7..f66dfad1d 100644 --- a/drivers/staging/fbtft/fb_upd161704.c +++ b/drivers/staging/fbtft/fb_upd161704.c @@ -32,27 +32,27 @@ static int init_display(struct fbtft_par *par) /* oscillator start */ write_reg(par, 0x003A, 0x0001); /*Oscillator 0: stop, 1: operation */ - udelay(100); + usleep_range(100, 200); /* y-setting */ write_reg(par, 0x0024, 0x007B); /* amplitude setting */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0025, 0x003B); /* amplitude setting */ write_reg(par, 0x0026, 0x0034); /* amplitude setting */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0027, 0x0004); /* amplitude setting */ write_reg(par, 0x0052, 0x0025); /* circuit setting 1 */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0053, 0x0033); /* circuit setting 2 */ write_reg(par, 0x0061, 0x001C); /* adjustment V10 positive polarity */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0062, 0x002C); /* adjustment V9 negative polarity */ write_reg(par, 0x0063, 0x0022); /* adjustment V34 positive polarity */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0064, 0x0027); /* adjustment V31 negative polarity */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0065, 0x0014); /* adjustment V61 negative polarity */ - udelay(10); + usleep_range(10, 50); write_reg(par, 0x0066, 0x0010); /* adjustment V61 negative polarity */ /* Basical clock for 1 line (BASECOUNT[7:0]) number specified */ @@ -60,7 +60,7 @@ static int init_display(struct fbtft_par *par) /* Power supply setting */ write_reg(par, 0x0019, 0x0000); /* DC/DC output setting */ - udelay(200); + usleep_range(200, 300); write_reg(par, 0x001A, 0x1000); /* DC/DC frequency setting */ write_reg(par, 0x001B, 0x0023); /* DC/DC rising setting */ write_reg(par, 0x001C, 0x0C01); /* Regulator voltage setting */ -- 2.55.0