lkml.org 
[lkml]   [2013]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 2/2] spi: tegra: remove checks for valid speed
Date
SPI core make sure that all transfer has proper speed set
before calling low level spi transfer. Hence, it is not
require to have check in spi driver.

Remove the check for speed validity from transfer and use it directly.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
drivers/spi/spi-tegra20-sflash.c | 14 +++++++++++---
drivers/spi/spi-tegra20-slink.c | 6 +++---
2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi-tegra20-sflash.c b/drivers/spi/spi-tegra20-sflash.c
index 448a8cc..9a42c15 100644
--- a/drivers/spi/spi-tegra20-sflash.c
+++ b/drivers/spi/spi-tegra20-sflash.c
@@ -269,9 +269,7 @@ static int tegra_sflash_start_transfer_one(struct spi_device *spi,
u32 speed;
unsigned long command;

- speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz;
- if (!speed)
- speed = tsd->spi_max_frequency;
+ speed = t->speed_hz;
if (speed != tsd->cur_speed) {
clk_set_rate(tsd->clk, speed);
tsd->cur_speed = speed;
@@ -319,6 +317,15 @@ static int tegra_sflash_start_transfer_one(struct spi_device *spi,
return tegra_sflash_start_cpu_based_transfer(tsd, t);
}

+static int tegra_sflash_setup(struct spi_device *spi)
+{
+ struct tegra_sflash_data *tsd = spi_master_get_devdata(spi->master);
+
+ /* Set speed to the spi max fequency if spi device has not set */
+ spi->max_speed_hz = spi->max_speed_hz ? : tsd->spi_max_frequency;
+ return 0;
+}
+
static int tegra_sflash_transfer_one_message(struct spi_master *master,
struct spi_message *msg)
{
@@ -492,6 +499,7 @@ static int tegra_sflash_probe(struct platform_device *pdev)

/* the spi->mode bits understood by this driver: */
master->mode_bits = SPI_CPOL | SPI_CPHA;
+ master->setup = tegra_sflash_setup;
master->transfer_one_message = tegra_sflash_transfer_one_message;
master->num_chipselect = MAX_CHIP_SELECT;
master->bus_num = -1;
diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 651167f..29039f1 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -728,9 +728,7 @@ static int tegra_slink_start_transfer_one(struct spi_device *spi,
unsigned long command2;

bits_per_word = t->bits_per_word;
- speed = t->speed_hz ? t->speed_hz : spi->max_speed_hz;
- if (!speed)
- speed = tspi->spi_max_frequency;
+ speed = t->speed_hz;
if (speed != tspi->cur_speed) {
clk_set_rate(tspi->clk, speed * 4);
tspi->cur_speed = speed;
@@ -841,6 +839,8 @@ static int tegra_slink_setup(struct spi_device *spi)

BUG_ON(spi->chip_select >= MAX_CHIP_SELECT);

+ /* Set speed to the spi max fequency if spi device has not set */
+ spi->max_speed_hz = spi->max_speed_hz ? : tspi->spi_max_frequency;
ret = pm_runtime_get_sync(tspi->dev);
if (ret < 0) {
dev_err(tspi->dev, "pm runtime failed, e = %d\n", ret);
--
1.7.1.1


\
 
 \ /
  Last update: 2013-01-04 20:21    [W:0.051 / U:0.456 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site