lkml.org 
[lkml]   [2017]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCHv2 5/9] spi: stm32: use normal conditional statements instead of ternary operator
Date
This patch replace ternary operator use by normal condition statements
to ease code reading.
It also removes redundant !!.

Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
---
drivers/spi/spi-stm32.c | 44 ++++++++++++++++++++++++++++++--------------
1 file changed, 30 insertions(+), 14 deletions(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index 0997d6d..72efc63 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -267,7 +267,10 @@ static int stm32_spi_prepare_mbr(struct stm32_spi *spi, u32 speed_hz)
return -EINVAL;

/* Determine the first power of 2 greater than or equal to div */
- mbrdiv = (div & (div - 1)) ? fls(div) : fls(div) - 1;
+ if (div & (div - 1))
+ mbrdiv = fls(div);
+ else
+ mbrdiv = fls(div) - 1;

spi->cur_speed = spi->clk_rate / (1 << mbrdiv);

@@ -285,9 +288,12 @@ static u32 stm32_spi_prepare_fthlv(struct stm32_spi *spi)
/* data packet should not exceed 1/2 of fifo space */
half_fifo = (spi->fifo_size / 2);

- fthlv = (spi->cur_bpw <= 8) ? half_fifo :
- (spi->cur_bpw <= 16) ? (half_fifo / 2) :
- (half_fifo / 4);
+ if (spi->cur_bpw <= 8)
+ fthlv = half_fifo;
+ else if (spi->cur_bpw <= 16)
+ fthlv = half_fifo / 2;
+ else
+ fthlv = half_fifo / 4;

/* align packet size with data registers access */
if (spi->cur_bpw > 8)
@@ -462,9 +468,9 @@ static bool stm32_spi_can_dma(struct spi_master *master,
struct stm32_spi *spi = spi_master_get_devdata(master);

dev_dbg(spi->dev, "%s: %s\n", __func__,
- (!!(transfer->len > spi->fifo_size)) ? "true" : "false");
+ (transfer->len > spi->fifo_size) ? "true" : "false");

- return !!(transfer->len > spi->fifo_size);
+ return (transfer->len > spi->fifo_size);
}

/**
@@ -493,7 +499,8 @@ static irqreturn_t stm32_spi_irq(int irq, void *dev_id)
* Full-Duplex, need to poll RXP event to know if there are remaining
* data, before disabling SPI.
*/
- mask |= ((spi->rx_buf && !spi->cur_usedma) ? SPI_SR_RXP : 0);
+ if (spi->rx_buf && !spi->cur_usedma)
+ mask |= SPI_SR_RXP;

if (!(sr & mask)) {
dev_dbg(spi->dev, "spurious IT (sr=0x%08x, ier=0x%08x)\n",
@@ -656,12 +663,18 @@ static void stm32_spi_dma_config(struct stm32_spi *spi,
enum dma_slave_buswidth buswidth;
u32 maxburst;

- buswidth = (spi->cur_bpw <= 8) ? DMA_SLAVE_BUSWIDTH_1_BYTE :
- (spi->cur_bpw <= 16) ? DMA_SLAVE_BUSWIDTH_2_BYTES :
- DMA_SLAVE_BUSWIDTH_4_BYTES;
+ if (spi->cur_bpw <= 8)
+ buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ else if (spi->cur_bpw <= 16)
+ buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ else
+ buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;

/* Valid for DMA Half or Full Fifo threshold */
- maxburst = (spi->cur_fthlv == 2) ? 1 : spi->cur_fthlv;
+ if (spi->cur_fthlv == 2)
+ maxburst = 1;
+ else
+ maxburst = spi->cur_fthlv;

memset(dma_conf, 0, sizeof(struct dma_slave_config));
dma_conf->direction = dir;
@@ -920,9 +933,12 @@ static int stm32_spi_transfer_one_setup(struct stm32_spi *spi,
~cfg2_clrb) | cfg2_setb,
spi->base + STM32_SPI_CFG2);

- nb_words = DIV_ROUND_UP(transfer->len * 8,
- (spi->cur_bpw <= 8) ? 8 :
- (spi->cur_bpw <= 16) ? 16 : 32);
+ if (spi->cur_bpw <= 8)
+ nb_words = transfer->len;
+ else if (spi->cur_bpw <= 16)
+ nb_words = DIV_ROUND_UP(transfer->len * 8, 16);
+ else
+ nb_words = DIV_ROUND_UP(transfer->len * 8, 32);
nb_words <<= SPI_CR2_TSIZE_SHIFT;

if (nb_words <= SPI_CR2_TSIZE) {
--
1.9.1
\
 
 \ /
  Last update: 2017-06-27 17:48    [W:0.102 / U:0.500 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site