From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E62473FDC06; Thu, 16 Jul 2026 11:08:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784200117; cv=none; b=J8Emhp8oOKIUGL8bSjqhnugqISxwiWXTy7N0R39G7xqsv78yk0oObi22gf+0QZC6drfjbIJOHjWXHzkM0Vy9AvoqgTUNGcTNaiQ3iOvFyUiUQvkUG2P6pvhiXiyV0SbMBQBpiwU61ZIOs3qt1NPJ1+QT+AeP186KYWS8wtsTQ7k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784200117; c=relaxed/simple; bh=x1ZIyVKdr7A/SeoU6wb+U8BSxH8pNQF4hiJSDCyNV7s=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=t2heCD9Wb+KS5cWFKdRt3EZKDItjMz/trtyIcMxPC1UqOyHFaRF4z4aAJk64uOYTUu6RcPCt86sU5eWbQ86Q8R7SjcdbCKOsd3L/xdO3V519jUd8GJ6RHEuKOpwbbO4MrwnVQwd98kfKGeiFcKBQFBuWP7frs9W0APx/ymBZ4Vk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=bTj/OcXl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="bTj/OcXl" Received: by smtp.kernel.org (Postfix) with ESMTPS id 79F0CC19425; Thu, 16 Jul 2026 11:08:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1784200115; bh=x1ZIyVKdr7A/SeoU6wb+U8BSxH8pNQF4hiJSDCyNV7s=; h=From:Date:Subject:To:Cc:Reply-To:From; b=bTj/OcXlfSg8X2KjsC7qjq3xzuquWV99Vf7k838VMGZnX2GdEhuYe1F7LXZ1apuAo In3mQ/la8gi6ijCfs5Uh6ZMzIr34WEmACOua/HCps8O+7hrHivIVIJb7+W/ViQGrC0 7rZDqZ36fHqsEs3KVKbSvMwDp5gM13o3J4K7XXCuLnEEUJWQCkZyTcoNx11xhF5VEJ h0Cx6mTpwqLMU6Smz//kfFcyj5iAdXHnlfZKKBn8pvBaWazqIo4IA99jbk2jEr+KDh uLZwkQxX4iC9gZdWdSaeo+KJ19g7RvScZLQALc7kEhLXsE5h9rfmFld/wDgRQxe6+t 3yy24k6hbGL2Q== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69F41C4450E; Thu, 16 Jul 2026 11:08:35 +0000 (UTC) From: Selby Mashiki via B4 Relay Date: Thu, 16 Jul 2026 13:08:33 +0200 Subject: [PATCH] staging: fbtft: fb_ra8875: replace udelay with usleep_range Precedence: bulk X-Mailing-List: linux-staging@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260716-staging-testing-v1-1-2ebc0c6bb27a@gmail.com> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yXMzQqCIRCF4VuRWX+CY2DRrUQLfyabFhaORSDee 9q3OjyL83YQqkwCZ9Wh0oeFn2UCNwXx7ksmzWkarLHOHNFpaT5zybqRtLUBwwmTOySTEObrVen G33/xct0t7/Cg2FYGxvgB5ulh2HMAAAA= X-Change-ID: 20260716-staging-testing-b1b81d63d0d1 To: Andy Shevchenko , Greg Kroah-Hartman Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Selby Mashiki X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784200113; l=1339; i=mashikiselby@gmail.com; s=20260716; h=from:subject:message-id; bh=Kw+oD1A3+MZuZjRR0K6KD78XW22TnMscyBb1Nk+0T4w=; b=+XPtQJi1tekVKGVbfuhRY+B22fbiiusYW8TIqcCqQ4iPZ2931p+OWTAgL0WeT9DfelBFQd/9T PeId6DNZnE7BgpJEDPyRCWLDoFaoaVkKJyNgYYFevuEBf03PbzXTZ28 X-Developer-Key: i=mashikiselby@gmail.com; a=ed25519; pk=pdu1PfyliHcDzX9YL6q+8PseyTQ5vDHYAsHmrqMp/BQ= X-Endpoint-Received: by B4 Relay for mashikiselby@gmail.com/20260716 with auth_id=875 X-Original-From: Selby Mashiki Reply-To: mashikiselby@gmail.com From: Selby Mashiki 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 --- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Selby Mashiki Date: Thu, 16 Jul 2026 13:08:33 +0200 Subject: [PATCH] staging: fbtft: fb_ra8875: replace udelay with usleep_range MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260716-staging-testing-v1-1-2ebc0c6bb27a@gmail.com> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/yXMzQqCIRCF4VuRWX+CY2DRrUQLfyabFhaORSDee 9q3OjyL83YQqkwCZ9Wh0oeFn2UCNwXx7ksmzWkarLHOHNFpaT5zybqRtLUBwwmTOySTEObrVen G33/xct0t7/Cg2FYGxvgB5ulh2HMAAAA= X-Change-ID: 20260716-staging-testing-b1b81d63d0d1 To: Andy Shevchenko , Greg Kroah-Hartman Cc: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Selby Mashiki X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784200113; l=1339; i=mashikiselby@gmail.com; s=20260716; h=from:subject:message-id; bh=Kw+oD1A3+MZuZjRR0K6KD78XW22TnMscyBb1Nk+0T4w=; b=+XPtQJi1tekVKGVbfuhRY+B22fbiiusYW8TIqcCqQ4iPZ2931p+OWTAgL0WeT9DfelBFQd/9T PeId6DNZnE7BgpJEDPyRCWLDoFaoaVkKJyNgYYFevuEBf03PbzXTZ28 X-Developer-Key: i=mashikiselby@gmail.com; a=ed25519; pk=pdu1PfyliHcDzX9YL6q+8PseyTQ5vDHYAsHmrqMp/BQ= X-Endpoint-Received: by B4 Relay for mashikiselby@gmail.com/20260716 with auth_id=875 List-Id: B4 Relay Submissions 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 --- 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