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Tue, 14 Jul 2026 12:11:21 -0700 (PDT) From: Panagiotis Gravias To: andy@kernel.org, gregkh@linuxfoundation.org Cc: namcao@linutronix.de, tomasz.unger@yahoo.pl, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Panagiotis Gravias Subject: [PATCH 1/3] staging/fbtft: Remove prohibited space before close parenthesis Date: Tue, 14 Jul 2026 22:09:40 +0300 Message-ID: <20260714190958.219437-4-graviaspanagiotis1@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260714190958.219437-2-graviaspanagiotis1@gmail.com> References: <20260714190958.219437-2-graviaspanagiotis1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fix checkpatch error: "space prohibited before that close parenthesis" in the define_fbtft_write_reg macro. Signed-off-by: Panagiotis Gravias --- drivers/staging/fbtft/fbtft-bus.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/fbtft/fbtft-bus.c b/drivers/staging/fbtft/fbtf= t-bus.c index 30e436ff19e4..38697992f5e1 100644 --- a/drivers/staging/fbtft/fbtft-bus.c +++ b/drivers/staging/fbtft/fbtft-bus.c @@ -62,9 +62,9 @@ out: \ } = \ EXPORT_SYMBOL(func); =20 -define_fbtft_write_reg(fbtft_write_reg8_bus8, u8, u8, ) +define_fbtft_write_reg(fbtft_write_reg8_bus8, u8, u8,) define_fbtft_write_reg(fbtft_write_reg16_bus8, __be16, u16, cpu_to_be16) -define_fbtft_write_reg(fbtft_write_reg16_bus16, u16, u16, ) +define_fbtft_write_reg(fbtft_write_reg16_bus16, u16, u16,) =20 void fbtft_write_reg8_bus9(struct fbtft_par *par, int len, ...) { --=20 2.55.0 From nobody Sat Jul 25 18:53:57 2026 Received: from mail-wm1-f48.google.com (mail-wm1-f48.google.com [209.85.128.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 45B184D90D5 for ; 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Tue, 14 Jul 2026 12:11:25 -0700 (PDT) Received: from evil-archie.tail5479a9.ts.net ([2a02:1388:23c0:16c0:aa41:f4ff:fec6:26e2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4950a2f951asm100677815e9.14.2026.07.14.12.11.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jul 2026 12:11:25 -0700 (PDT) From: Panagiotis Gravias To: andy@kernel.org, gregkh@linuxfoundation.org Cc: namcao@linutronix.de, tomasz.unger@yahoo.pl, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Panagiotis Gravias Subject: [PATCH 2/3] staging/fbtft: Align arguments to match open parenthesis Date: Tue, 14 Jul 2026 22:09:41 +0300 Message-ID: <20260714190958.219437-5-graviaspanagiotis1@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260714190958.219437-2-graviaspanagiotis1@gmail.com> References: <20260714190958.219437-2-graviaspanagiotis1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fix checkpatch warning for alignment in write_reg() call to match the open parenthesis, improving code readability. Signed-off-by: Panagiotis Gravias --- drivers/staging/fbtft/fb_tinylcd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/fbtft/fb_tinylcd.c b/drivers/staging/fbtft/fb_= tinylcd.c index afa8f1c740c5..d58b1247262b 100644 --- a/drivers/staging/fbtft/fb_tinylcd.c +++ b/drivers/staging/fbtft/fb_tinylcd.c @@ -38,7 +38,7 @@ 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); fsleep(250); --=20 2.55.0 From nobody Sat Jul 25 18:53:57 2026 Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D1A0B4F796E for ; 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Tue, 14 Jul 2026 12:11:28 -0700 (PDT) Received: from evil-archie.tail5479a9.ts.net ([2a02:1388:23c0:16c0:aa41:f4ff:fec6:26e2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4950a2f951asm100677815e9.14.2026.07.14.12.11.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jul 2026 12:11:28 -0700 (PDT) From: Panagiotis Gravias To: andy@kernel.org, gregkh@linuxfoundation.org Cc: namcao@linutronix.de, tomasz.unger@yahoo.pl, dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Panagiotis Gravias Subject: [PATCH 3/3] staging: fbtft: Replace udelay with usleep_range Date: Tue, 14 Jul 2026 22:09:42 +0300 Message-ID: <20260714190958.219437-6-graviaspanagiotis1@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260714190958.219437-2-graviaspanagiotis1@gmail.com> References: <20260714190958.219437-2-graviaspanagiotis1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fix checkpatch warnings preferring usleep_range over udelay. Replaced udelay() calls with usleep_range() providing a reasonable upper bound to allow the scheduler to coalesce timer interrupts. Signed-off-by: Panagiotis Gravias --- drivers/staging/fbtft/fb_ra8875.c | 4 ++-- drivers/staging/fbtft/fb_upd161704.c | 18 +++++++++--------- 2 files changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/staging/fbtft/fb_ra8875.c b/drivers/staging/fbtft/fb_r= a8875.c index 0ab1de6647d0..d2400bb44f1c 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--; =20 - udelay(100); + usleep_range(100, 200); =20 if (len) { buf =3D (u8 *)par->buf; @@ -231,7 +231,7 @@ static void write_reg8_bus8(struct fbtft_par *par, int = len, ...) =20 /* restore user spi-speed */ par->fbtftops.write =3D fbtft_write_spi; - udelay(100); + usleep_range(100, 200); } =20 static int write_vmem16_bus8(struct fbtft_par *par, size_t offset, size_t = len) diff --git a/drivers/staging/fbtft/fb_upd161704.c b/drivers/staging/fbtft/f= b_upd161704.c index c680160d6380..e26766f58a50 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) =20 /* oscillator start */ write_reg(par, 0x003A, 0x0001); /*Oscillator 0: stop, 1: operation */ - udelay(100); + usleep_range(100, 200); =20 /* y-setting */ write_reg(par, 0x0024, 0x007B); /* amplitude setting */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0025, 0x003B); /* amplitude setting */ write_reg(par, 0x0026, 0x0034); /* amplitude setting */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0027, 0x0004); /* amplitude setting */ write_reg(par, 0x0052, 0x0025); /* circuit setting 1 */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0053, 0x0033); /* circuit setting 2 */ write_reg(par, 0x0061, 0x001C); /* adjustment V10 positive polarity */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0062, 0x002C); /* adjustment V9 negative polarity */ write_reg(par, 0x0063, 0x0022); /* adjustment V34 positive polarity */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0064, 0x0027); /* adjustment V31 negative polarity */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0065, 0x0014); /* adjustment V61 negative polarity */ - udelay(10); + usleep_range(10, 20); write_reg(par, 0x0066, 0x0010); /* adjustment V61 negative polarity */ =20 /* Basical clock for 1 line (BASECOUNT[7:0]) number specified */ @@ -60,7 +60,7 @@ static int init_display(struct fbtft_par *par) =20 /* 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 */ --=20 2.55.0