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spi: npcm-fiu: Fix UMA reads when dummy.nbytes == 0

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[ Upstream commit 2ec8b010979036c2fe79a64adb6ecc0bd11e91d1 ]

We don't want to use the value of ilog2(0) as dummy.buswidth is 0 when
dummy.nbytes is 0. Since we have no dummy bytes, we don't need to
configure the dummy byte bits per clock register value anyway.

Signed-off-by: "William A. Kennington III" <william@wkennington.com>
Link: https://lore.kernel.org/r/20230922182812.2728066-1-william@wkennington.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
William A. Kennington III 2023-09-22 11:28:12 -07:00 committed by Greg Kroah-Hartman
parent 788b308340
commit 6c23b6d308
1 changed files with 3 additions and 2 deletions
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5
drivers/spi/spi-npcm-fiu.c
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@ -334,8 +334,9 @@ static int npcm_fiu_uma_read(struct spi_mem *mem,
uma_cfg |= ilog2(op->cmd.buswidth);
uma_cfg |= ilog2(op->addr.buswidth)
<< NPCM_FIU_UMA_CFG_ADBPCK_SHIFT;
uma_cfg |= ilog2(op->dummy.buswidth)
<< NPCM_FIU_UMA_CFG_DBPCK_SHIFT;
if (op->dummy.nbytes)
uma_cfg |= ilog2(op->dummy.buswidth)
<< NPCM_FIU_UMA_CFG_DBPCK_SHIFT;
uma_cfg |= ilog2(op->data.buswidth)
<< NPCM_FIU_UMA_CFG_RDBPCK_SHIFT;
uma_cfg |= op->dummy.nbytes << NPCM_FIU_UMA_CFG_DBSIZ_SHIFT;