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From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org,
	linux-kernel@vger.kernel.org, alsa-devel@alsa-project.org
Cc: Daniel Mack <daniel@zonque.org>,
	Haojian Zhuang <haojian.zhuang@gmail.com>,
	Robert Jarzmik <robert.jarzmik@free.fr>,
	Mark Brown <broonie@kernel.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.com>
Subject: [PATCH v3 12/14] spi: pxa2xx: Extract read_SSSR_bits() helper
Date: Mon, 10 May 2021 15:41:32 +0300	[thread overview]
Message-ID: <20210510124134.24638-13-andriy.shevchenko@linux.intel.com> (raw)
In-Reply-To: <20210510124134.24638-1-andriy.shevchenko@linux.intel.com>

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


  parent reply	other threads:[~2021-05-10 13:02 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-10 12:41 [PATCH v3 00/14] spi: pxa2xx: Set of cleanups Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 01/14] spi: pxa2xx: Use one point of return when ->probe() fails Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 02/14] spi: pxa2xx: Utilize MMIO and physical base from struct ssp_device Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 03/14] spi: pxa2xx: Utilize struct device " Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 04/14] spi: pxa2xx: Replace header inclusions by forward declarations Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 05/14] spi: pxa2xx: Unify ifdeffery used in the headers Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 06/14] spi: pxa2xx: Group Intel Quark specific definitions Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 07/14] spi: pxa2xx: Introduce int_stop_and_reset() helper Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 08/14] spi: pxa2xx: Reuse int_error_stop() in pxa2xx_spi_slave_abort() Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 09/14] spi: pxa2xx: Use pxa_ssp_enable()/pxa_ssp_disable() in the driver Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 10/14] spi: pxa2xx: Extract pxa2xx_spi_update() helper Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 11/14] spi: pxa2xx: Extract clear_SSCR1_bits() helper Andy Shevchenko
2021-05-10 12:41 ` Andy Shevchenko [this message]
2021-05-10 12:41 ` [PATCH v3 13/14] spi: pxa2xx: Constify struct driver_data parameter Andy Shevchenko
2021-05-10 12:41 ` [PATCH v3 14/14] spi: pxa2xx: Introduce special type for Merrifield SPIs Andy Shevchenko
2021-05-11 18:21 ` (subset) [PATCH v3 00/14] spi: pxa2xx: Set of cleanups Mark Brown

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