From: Joy Chakraborty <joychakr@google.com>
To: Vinod Koul <vkoul@kernel.org>
Cc: dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
devicetree@vger.kernel.org, manugautam@google.com,
danielmentz@google.com, sjadavani@google.com,
Joy Chakraborty <joychakr@google.com>
Subject: [PATCH v2 2/6] dmaengine: pl330: Use FFS to calculate burst size
Date: Fri, 12 May 2023 14:14:41 +0000 [thread overview]
Message-ID: <20230512141445.2026660-3-joychakr@google.com> (raw)
In-Reply-To: <20230512141445.2026660-1-joychakr@google.com>
Use __ffs to calculate burst size in pl330_prep_dma_memcpy() for
consistency across the driver as other functions already use __ffs for
the same functionality.
Signed-off-by: Joy Chakraborty <joychakr@google.com>
---
drivers/dma/pl330.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index c006e481b4c5..39a66ff29e27 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2804,10 +2804,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
while ((src | dst | len) & (burst - 1))
burst /= 2;
- desc->rqcfg.src_brst_size = 0;
- while (burst != (1 << desc->rqcfg.src_brst_size))
- desc->rqcfg.src_brst_size++;
-
+ desc->rqcfg.src_brst_size = __ffs(burst);
desc->rqcfg.src_brst_len = get_burst_len(desc, len);
/*
* If burst size is smaller than bus width then make sure we only
--
2.40.1.606.ga4b1b128d6-goog
next prev parent reply other threads:[~2023-05-12 14:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-12 14:14 [PATCH v2 0/6] dmaengine: pl330: Updates and logical changes for peripheral usecases Joy Chakraborty
2023-05-12 14:14 ` [PATCH v2 1/6] dmaengine: pl330: Separate SRC and DST burst size and len Joy Chakraborty
2023-05-12 14:14 ` Joy Chakraborty [this message]
2023-05-12 14:14 ` [PATCH v2 3/6] dmaengine: pl330: Change if-else to switch-case for consistency Joy Chakraborty
2023-05-12 14:14 ` [PATCH v2 4/6] dmaengine: pl330: Change unused arg "len" from get_burst_len() Joy Chakraborty
2023-05-12 14:14 ` [PATCH v2 5/6] dmaengine: pl330: Optimize AxSize for peripheral usecases Joy Chakraborty
2023-05-12 14:14 ` [PATCH v2 6/6] dmaengine: pl330: Use dma singles for peripheral _dregs Joy Chakraborty
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