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From: Andi Shyti <andi.shyti@kernel.org>
To: linux-i2c <linux-i2c@vger.kernel.org>
Cc: Andi Shyti <andi.shyti@kernel.org>
Subject: [PATCH 06/10] i2c: iproc: Replace udelay() with usleep_range()
Date: Fri, 18 Apr 2025 23:16:31 +0200	[thread overview]
Message-ID: <20250418211635.2666234-7-andi.shyti@kernel.org> (raw)
In-Reply-To: <20250418211635.2666234-1-andi.shyti@kernel.org>

Replace udelay(100) with usleep_range(100, 200) as recommended
by kernel documentation. The delay is not in atomic context, so
busy-waiting is unnecessary.

Also update the comment for clarity.

Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
---
 drivers/i2c/busses/i2c-bcm-iproc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 44083698121a..2e04ea157e8e 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -276,8 +276,8 @@ static void bcm_iproc_i2c_slave_init(
 		val |= BIT(CFG_RESET_SHIFT);
 		iproc_i2c_wr_reg(iproc_i2c, CFG_OFFSET, val);
 
-		/* wait 100 usec per spec */
-		udelay(100);
+		/* wait approximately 100 usec as per spec */
+		usleep_range(100, 200);
 
 		/* bring controller out of reset */
 		val &= ~(BIT(CFG_RESET_SHIFT));
@@ -687,8 +687,8 @@ static void bcm_iproc_i2c_init(struct bcm_iproc_i2c_dev *iproc_i2c)
 	val &= ~(BIT(CFG_EN_SHIFT));
 	iproc_i2c_wr_reg(iproc_i2c, CFG_OFFSET, val);
 
-	/* wait 100 usec per spec */
-	udelay(100);
+	/* wait approximately 100 usec as per spec */
+	usleep_range(100, 200);
 
 	/* bring controller out of reset */
 	val &= ~(BIT(CFG_RESET_SHIFT));
-- 
2.49.0


  parent reply	other threads:[~2025-04-18 22:36 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-04-18 21:16 [PATCH 00/10] Few improvements on the Broadcom iProc Andi Shyti
2025-04-18 21:16 ` [PATCH 01/10] i2c: iproc: Drop unnecessary initialisation of 'ret' Andi Shyti
2025-04-18 21:16 ` [PATCH 02/10] i2c: iproc: Use dev_err_probe in probe Andi Shyti
2025-04-18 21:16 ` [PATCH 03/10] i2c: iproc: Use u32 instead of uint32_t Andi Shyti
2025-04-18 21:16 ` [PATCH 04/10] i2c: iproc: Fix alignment to match the open parenthesis Andi Shyti
2025-04-18 21:16 ` [PATCH 05/10] i2c: iproc: Remove stray blank line in slave ISR Andi Shyti
2025-04-18 21:16 ` Andi Shyti [this message]
2025-04-18 21:16 ` [PATCH 07/10] i2c: iproc: Fix indentation of bcm_iproc_i2c_slave_init() Andi Shyti
2025-04-18 21:16 ` [PATCH 08/10] i2c: iproc: Move function and avoid prototypes Andi Shyti
2025-04-19 19:46   ` Mukesh Kumar Savaliya
2025-04-26 20:19     ` [PATCH v2 " Andi Shyti
2025-04-18 21:16 ` [PATCH 09/10] i2c: iproc: When there's an error treat it as an error Andi Shyti
2025-04-18 21:16 ` [PATCH 10/10] i2c: iproc: Remove unnecessary double negation Andi Shyti
2025-04-28 19:30 ` [PATCH 00/10] Few improvements on the Broadcom iProc Andi Shyti

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