[PATCH v4 6/8] spi: pxa2xx: Extract read_SSSR_bits() helper

Andy Shevchenko
2021-05-11T14:27:11Z

There are few places that repeat the logic of "read some bits from SSSR".
Extract read_SSSR_bits() helper to deduplicate that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
drivers/spi/spi-pxa2xx-dma.c | 9 +++------
drivers/spi/spi-pxa2xx.c | 26 +++++++++++---------------
drivers/spi/spi-pxa2xx.h | 7 ++++++-
3 files changed, 20 insertions(+), 22 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index e581027e99f9..f022d82dcb1b 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -34,11 +34,8 @@ static void pxa2xx_spi_dma_transfer_complete(struct driver_data *drv_data,
* might not know about the error yet. So we re-check the
* ROR bit here before we clear the status register.
*/
- if (!error) {
- u32 status = pxa2xx_spi_read(drv_data, SSSR)
- & drv_data->mask_sr;
- error = status & SSSR_ROR;
- }
+ if (!error)
+ error = read_SSSR_bits(drv_data, drv_data->mask_sr) & SSSR_ROR;

/* Clear status & disable interrupts */
clear_SSCR1_bits(drv_data, drv_data->dma_cr1);
@@ -119,7 +116,7 @@ irqreturn_t pxa2xx_spi_dma_transfer(struct driver_data *drv_data)
{
u32 status;

- status = pxa2xx_spi_read(drv_data, SSSR) & drv_data->mask_sr;
+ status = read_SSSR_bits(drv_data, drv_data->mask_sr);
if (status & SSSR_ROR) {
dev_err(drv_data->ssp->dev, "FIFO overrun\n");

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index 3a4ad16614f7..af3f01de8f5b 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -247,7 +247,7 @@ static bool pxa2xx_spi_txfifo_full(const struct driver_data *drv_data)
break;
}

- return (pxa2xx_spi_read(drv_data, SSSR) & mask) == mask;
+ return read_SSSR_bits(drv_data, mask) == mask;
}

static void pxa2xx_spi_clear_rx_thre(const struct driver_data *drv_data,
@@ -488,7 +488,7 @@ int pxa2xx_spi_flush(struct driver_data *drv_data)
unsigned long limit = loops_per_jiffy << 1;

do {
- while (pxa2xx_spi_read(drv_data, SSSR) & SSSR_RNE)
+ while (read_SSSR_bits(drv_data, SSSR_RNE))
pxa2xx_spi_read(drv_data, SSDR);
} while ((pxa2xx_spi_read(drv_data, SSSR) & SSSR_BSY) && --limit);
write_SSSR_CS(drv_data, SSSR_ROR);
@@ -523,8 +523,7 @@ static int null_reader(struct driver_data *drv_data)
{
u8 n_bytes = drv_data->n_bytes;

- while ((pxa2xx_spi_read(drv_data, SSSR) & SSSR_RNE)
- && (drv_data->rx < drv_data->rx_end)) {
+ while (read_SSSR_bits(drv_data, SSSR_RNE) && drv_data->rx < drv_data->rx_end) {
pxa2xx_spi_read(drv_data, SSDR);
drv_data->rx += n_bytes;
}
@@ -546,8 +545,7 @@ static int u8_writer(struct driver_data *drv_data)

static int u8_reader(struct driver_data *drv_data)
{
- while ((pxa2xx_spi_read(drv_data, SSSR) & SSSR_RNE)
- && (drv_data->rx < drv_data->rx_end)) {
+ while (read_SSSR_bits(drv_data, SSSR_RNE) && drv_data->rx < drv_data->rx_end) {
*(u8 *)(drv_data->rx) = pxa2xx_spi_read(drv_data, SSDR);
++drv_data->rx;
}
@@ -569,8 +567,7 @@ static int u16_writer(struct driver_data *drv_data)

static int u16_reader(struct driver_data *drv_data)
{
- while ((pxa2xx_spi_read(drv_data, SSSR) & SSSR_RNE)
- && (drv_data->rx < drv_data->rx_end)) {
+ while (read_SSSR_bits(drv_data, SSSR_RNE) && drv_data->rx < drv_data->rx_end) {
*(u16 *)(drv_data->rx) = pxa2xx_spi_read(drv_data, SSDR);
drv_data->rx += 2;
}
@@ -592,8 +589,7 @@ static int u32_writer(struct driver_data *drv_data)

static int u32_reader(struct driver_data *drv_data)
{
- while ((pxa2xx_spi_read(drv_data, SSSR) & SSSR_RNE)
- && (drv_data->rx < drv_data->rx_end)) {
+ while (read_SSSR_bits(drv_data, SSSR_RNE) && drv_data->rx < drv_data->rx_end) {
*(u32 *)(drv_data->rx) = pxa2xx_spi_read(drv_data, SSDR);
drv_data->rx += 4;
}
@@ -655,10 +651,11 @@ static void int_transfer_complete(struct driver_data *drv_data)

static irqreturn_t interrupt_transfer(struct driver_data *drv_data)
{
- u32 irq_mask = (pxa2xx_spi_read(drv_data, SSCR1) & SSCR1_TIE) ?
- drv_data->mask_sr : drv_data->mask_sr & ~SSSR_TFS;
+ u32 irq_status;

- u32 irq_status = pxa2xx_spi_read(drv_data, SSSR) & irq_mask;
+ irq_status = read_SSSR_bits(drv_data, drv_data->mask_sr);
+ if (!(pxa2xx_spi_read(drv_data, SSCR1) & SSCR1_TIE))
+ irq_status &= ~SSSR_TFS;

if (irq_status & SSSR_ROR) {
int_error_stop(drv_data, "interrupt_transfer: fifo overrun", -EIO);
@@ -1110,8 +1107,7 @@ static int pxa2xx_spi_transfer_one(struct spi_controller *controller,
pxa_ssp_enable(drv_data->ssp);

if (is_mmp2_ssp(drv_data)) {
- u8 tx_level = (pxa2xx_spi_read(drv_data, SSSR)
- & SSSR_TFL_MASK) >> 8;
+ u8 tx_level = read_SSSR_bits(drv_data, SSSR_TFL_MASK) >> 8;

if (tx_level) {
/* On MMP2, flipping SSE doesn't to empty TXFIFO. */
diff --git a/drivers/spi/spi-pxa2xx.h b/drivers/spi/spi-pxa2xx.h
index ed63f7165cd8..d2cb40f97c4b 100644
--- a/drivers/spi/spi-pxa2xx.h
+++ b/drivers/spi/spi-pxa2xx.h
@@ -110,11 +110,16 @@ static inline void clear_SSCR1_bits(const struct driver_data *drv_data, u32 bits
pxa2xx_spi_write(drv_data, SSCR1, pxa2xx_spi_read(drv_data, SSCR1) & ~bits);
}

+static inline u32 read_SSSR_bits(const struct driver_data *drv_data, u32 bits)
+{
+ return pxa2xx_spi_read(drv_data, SSSR) & bits;
+}
+
static inline void write_SSSR_CS(struct driver_data *drv_data, u32 val)
{
if (drv_data->ssp_type == CE4100_SSP ||
drv_data->ssp_type == QUARK_X1000_SSP)
- val |= pxa2xx_spi_read(drv_data, SSSR) & SSSR_ALT_FRM_MASK;
+ val |= read_SSSR_bits(drv_data, SSSR_ALT_FRM_MASK);

pxa2xx_spi_write(drv_data, SSSR, val);
}
--
2.30.2