lkml.org 
[lkml]   [2017]   [Sep]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 08/10] spi-nor: intel-spi: Remove the unnecessary HSFSTS register RW
Date
There is no code that alters the HSFSTS register content in between
in intel_spi_write(). Remove the unnecessary RW to save some cycles.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

drivers/mtd/spi-nor/intel-spi.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/mtd/spi-nor/intel-spi.c b/drivers/mtd/spi-nor/intel-spi.c
index 07146ab..91ceef7 100644
--- a/drivers/mtd/spi-nor/intel-spi.c
+++ b/drivers/mtd/spi-nor/intel-spi.c
@@ -611,7 +611,6 @@ static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len,
val |= HSFSTS_CTL_AEL | HSFSTS_CTL_FCERR | HSFSTS_CTL_FDONE;
val |= (block_size - 1) << HSFSTS_CTL_FDBC_SHIFT;
val |= HSFSTS_CTL_FCYCLE_WRITE;
- writel(val, ispi->base + HSFSTS_CTL);

ret = intel_spi_write_block(ispi, write_buf, block_size);
if (ret) {
@@ -620,8 +619,8 @@ static ssize_t intel_spi_write(struct spi_nor *nor, loff_t to, size_t len,
}

/* Start the write now */
- val = readl(ispi->base + HSFSTS_CTL);
- writel(val | HSFSTS_CTL_FGO, ispi->base + HSFSTS_CTL);
+ val |= HSFSTS_CTL_FGO;
+ writel(val, ispi->base + HSFSTS_CTL);

ret = intel_spi_wait_hw_busy(ispi);
if (ret) {
--
2.9.2
\
 
 \ /
  Last update: 2017-09-01 09:57    [W:0.085 / U:0.228 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site