From: Sean Anderson <seanga2@gmail.com>
To: u-boot@lists.denx.de
Subject: [PATCH v5 1/6] wdt: dw: Switch to using fls for log2
Date: Tue, 22 Dec 2020 18:58:58 -0500 [thread overview]
Message-ID: <20201222235903.131751-2-seanga2@gmail.com> (raw)
In-Reply-To: <20201222235903.131751-1-seanga2@gmail.com>
log_2_n_round_up is only found in arm. fls performs the same job and is
generic.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
(no changes since v2)
Changes in v2:
- Fix fls being off-by-one when compared to log_2_n_round_up
drivers/watchdog/designware_wdt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/watchdog/designware_wdt.c b/drivers/watchdog/designware_wdt.c
index 7caa6c550c..c0f43785a9 100644
--- a/drivers/watchdog/designware_wdt.c
+++ b/drivers/watchdog/designware_wdt.c
@@ -9,7 +9,6 @@
#include <reset.h>
#include <wdt.h>
#include <asm/io.h>
-#include <asm/utils.h>
#include <linux/bitops.h>
#define DW_WDT_CR 0x00
@@ -35,7 +34,7 @@ static int designware_wdt_settimeout(void __iomem *base, unsigned int clk_khz,
signed int i;
/* calculate the timeout range value */
- i = log_2_n_round_up(timeout * clk_khz) - 16;
+ i = fls(timeout * clk_khz - 1) - 16;
i = clamp(i, 0, 15);
writel(i | (i << 4), base + DW_WDT_TORR);
--
2.29.2
next prev parent reply other threads:[~2020-12-22 23:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-22 23:58 [PATCH v5 0/6] wdt: Add support for watchdogs on Kendryte K210 Sean Anderson
2020-12-22 23:58 ` Sean Anderson [this message]
2020-12-22 23:58 ` [PATCH v5 2/6] wdt: dw: Switch to if(CONFIG()) instead of using #if Sean Anderson
2020-12-22 23:59 ` [PATCH v5 3/6] wdt: dw: Enable the clock before using it Sean Anderson
2020-12-22 23:59 ` [PATCH v5 4/6] wdt: dw: Free the clock on error Sean Anderson
2020-12-22 23:59 ` [PATCH v5 5/6] riscv: Add watchdog bindings for the k210 Sean Anderson
2020-12-22 23:59 ` [PATCH v5 6/6] riscv: Enable watchdog " Sean Anderson
2021-03-03 11:08 ` Leo Liang
2021-01-13 6:13 ` [PATCH v5 0/6] wdt: Add support for watchdogs on Kendryte K210 Sean Anderson
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