spi: i.MX: Some cleanup patches

spi: i.MX: Some cleanup patches

[Sascha Hauer]

This series contains some drive-by cleanup patches I came up with
while reviewing other patches for this driver, Jiada, please consider
basing your next round of patches on this when Mark signals he is
ok with this series.

Sascha

----------------------------------------------------------------
Sascha Hauer (6):
      spi: imx: Nothing to do in setupxfer when transfer is NULL
      spi: imx: Drop unnecessary check
      spi: imx: put struct spi_imx_config members into driver private struct
      spi: imx: drop bogus unnecessary dma config
      spi: imx: remove bytes_per_word from private driver struct
      spi: imx: rename 'bpw' variables

 drivers/spi/spi-imx.c | 86 ++++++++++++++++++++-------------------------------
 1 file changed, 33 insertions(+), 53 deletions(-)

spi: i.MX: Some cleanup patches

[Sascha Hauer]

This series contains some drive-by cleanup patches I came up with
while reviewing other patches for this driver, Jiada, please consider
basing your next round of patches on this when Mark signals he is
ok with this series.

Sascha

----------------------------------------------------------------
Sascha Hauer (6):
      spi: imx: Nothing to do in setupxfer when transfer is NULL
      spi: imx: Drop unnecessary check
      spi: imx: put struct spi_imx_config members into driver private struct
      spi: imx: drop bogus unnecessary dma config
      spi: imx: remove bytes_per_word from private driver struct
      spi: imx: rename 'bpw' variables

 drivers/spi/spi-imx.c | 86 ++++++++++++++++++++-------------------------------
 1 file changed, 33 insertions(+), 53 deletions(-)
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[PATCH 1/6] spi: imx: Nothing to do in setupxfer when transfer is NULL

[Sascha Hauer]

When the spi_transfer given in spi_imx_setupxfer is NULL then
we have nothing to do. Bail out early in this case so that
we do not have to test for t != NULL multiple times later.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/spi-imx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index b402530a7a9a..4b5cd0c84450 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -217,9 +217,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 	if (!master->dma_rx)
 		return false;
 
-	if (!transfer)
-		return false;
-
 	bpw = transfer->bits_per_word;
 	if (!bpw)
 		bpw = spi->bits_per_word;
@@ -895,8 +892,11 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	struct spi_imx_config config;
 	int ret;
 
-	config.bpw = t ? t->bits_per_word : spi->bits_per_word;
-	config.speed_hz  = t ? t->speed_hz : spi->max_speed_hz;
+	if (!t)
+		return 0;
+
+	config.bpw = t->bits_per_word;
+	config.speed_hz  = t->speed_hz;
 
 	if (!config.speed_hz)
 		config.speed_hz = spi->max_speed_hz;
-- 
2.11.0

[PATCH 1/6] spi: imx: Nothing to do in setupxfer when transfer is NULL

[Sascha Hauer]

When the spi_transfer given in spi_imx_setupxfer is NULL then
we have nothing to do. Bail out early in this case so that
we do not have to test for t != NULL multiple times later.

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-imx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index b402530a7a9a..4b5cd0c84450 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -217,9 +217,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 	if (!master->dma_rx)
 		return false;
 
-	if (!transfer)
-		return false;
-
 	bpw = transfer->bits_per_word;
 	if (!bpw)
 		bpw = spi->bits_per_word;
@@ -895,8 +892,11 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	struct spi_imx_config config;
 	int ret;
 
-	config.bpw = t ? t->bits_per_word : spi->bits_per_word;
-	config.speed_hz  = t ? t->speed_hz : spi->max_speed_hz;
+	if (!t)
+		return 0;
+
+	config.bpw = t->bits_per_word;
+	config.speed_hz  = t->speed_hz;
 
 	if (!config.speed_hz)
 		config.speed_hz = spi->max_speed_hz;
-- 
2.11.0

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[PATCH 2/6] spi: imx: Drop unnecessary check

[Sascha Hauer]

__spi_validate makes sure that every transfer has a valid bits_per_word
and speed_hz setting. We do not need to fallback to values from the
spi_device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/spi-imx.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 4b5cd0c84450..e3bc3d51a2d6 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -218,8 +218,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 		return false;
 
 	bpw = transfer->bits_per_word;
-	if (!bpw)
-		bpw = spi->bits_per_word;
 
 	bpw = spi_imx_bytes_per_word(bpw);
 
@@ -898,11 +896,6 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	config.bpw = t->bits_per_word;
 	config.speed_hz  = t->speed_hz;
 
-	if (!config.speed_hz)
-		config.speed_hz = spi->max_speed_hz;
-	if (!config.bpw)
-		config.bpw = spi->bits_per_word;
-
 	/* Initialize the functions for transfer */
 	if (config.bpw <= 8) {
 		spi_imx->rx = spi_imx_buf_rx_u8;
-- 
2.11.0

[PATCH 2/6] spi: imx: Drop unnecessary check

[Sascha Hauer]

__spi_validate makes sure that every transfer has a valid bits_per_word
and speed_hz setting. We do not need to fallback to values from the
spi_device.

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-imx.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 4b5cd0c84450..e3bc3d51a2d6 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -218,8 +218,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 		return false;
 
 	bpw = transfer->bits_per_word;
-	if (!bpw)
-		bpw = spi->bits_per_word;
 
 	bpw = spi_imx_bytes_per_word(bpw);
 
@@ -898,11 +896,6 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	config.bpw = t->bits_per_word;
 	config.speed_hz  = t->speed_hz;
 
-	if (!config.speed_hz)
-		config.speed_hz = spi->max_speed_hz;
-	if (!config.bpw)
-		config.bpw = spi->bits_per_word;
-
 	/* Initialize the functions for transfer */
 	if (config.bpw <= 8) {
 		spi_imx->rx = spi_imx_buf_rx_u8;
-- 
2.11.0

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[PATCH 3/6] spi: imx: put struct spi_imx_config members into driver private struct

[Sascha Hauer]

struct spi_imx_config used to hold data specific to the current
transfer. However, other data is in the drivers private data struct.
Let's drop struct spi_imx_config and put the variables into the
drivers private data struct aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/spi-imx.c | 50 +++++++++++++++++++++++---------------------------
 1 file changed, 23 insertions(+), 27 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index e3bc3d51a2d6..3fa5ccfb45a1 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -56,10 +56,6 @@
 
 /* The maximum  bytes that a sdma BD can transfer.*/
 #define MAX_SDMA_BD_BYTES  (1 << 15)
-struct spi_imx_config {
-	unsigned int speed_hz;
-	unsigned int bpw;
-};
 
 enum spi_imx_devtype {
 	IMX1_CSPI,
@@ -74,7 +70,7 @@ struct spi_imx_data;
 
 struct spi_imx_devtype_data {
 	void (*intctrl)(struct spi_imx_data *, int);
-	int (*config)(struct spi_device *, struct spi_imx_config *);
+	int (*config)(struct spi_device *);
 	void (*trigger)(struct spi_imx_data *);
 	int (*rx_available)(struct spi_imx_data *);
 	void (*reset)(struct spi_imx_data *);
@@ -94,6 +90,8 @@ struct spi_imx_data {
 	unsigned long spi_clk;
 	unsigned int spi_bus_clk;
 
+	unsigned int speed_hz;
+	unsigned int bits_per_word;
 	unsigned int bytes_per_word;
 	unsigned int spi_drctl;
 
@@ -335,12 +333,11 @@ static void mx51_ecspi_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MX51_ECSPI_CTRL);
 }
 
-static int mx51_ecspi_config(struct spi_device *spi,
-			     struct spi_imx_config *config)
+static int mx51_ecspi_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	u32 ctrl = MX51_ECSPI_CTRL_ENABLE;
-	u32 clk = config->speed_hz, delay, reg;
+	u32 clk = spi_imx->speed_hz, delay, reg;
 	u32 cfg = readl(spi_imx->base + MX51_ECSPI_CONFIG);
 
 	/*
@@ -359,13 +356,13 @@ static int mx51_ecspi_config(struct spi_device *spi,
 		ctrl |= MX51_ECSPI_CTRL_DRCTL(spi_imx->spi_drctl);
 
 	/* set clock speed */
-	ctrl |= mx51_ecspi_clkdiv(spi_imx, config->speed_hz, &clk);
+	ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->speed_hz, &clk);
 	spi_imx->spi_bus_clk = clk;
 
 	/* set chip select to use */
 	ctrl |= MX51_ECSPI_CTRL_CS(spi->chip_select);
 
-	ctrl |= (config->bpw - 1) << MX51_ECSPI_CTRL_BL_OFFSET;
+	ctrl |= (spi_imx->bits_per_word - 1) << MX51_ECSPI_CTRL_BL_OFFSET;
 
 	cfg |= MX51_ECSPI_CONFIG_SBBCTRL(spi->chip_select);
 
@@ -496,21 +493,21 @@ static void mx31_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx31_config(struct spi_device *spi, struct spi_imx_config *config)
+static int mx31_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz, &clk) <<
+	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->speed_hz, &clk) <<
 		MX31_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
 	if (is_imx35_cspi(spi_imx)) {
-		reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
+		reg |= (spi_imx->bits_per_word - 1) << MX35_CSPICTRL_BL_SHIFT;
 		reg |= MX31_CSPICTRL_SSCTL;
 	} else {
-		reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
+		reg |= (spi_imx->bits_per_word - 1) << MX31_CSPICTRL_BC_SHIFT;
 	}
 
 	if (spi->mode & SPI_CPHA)
@@ -592,18 +589,18 @@ static void mx21_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx21_config(struct spi_device *spi, struct spi_imx_config *config)
+static int mx21_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER;
 	unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz, max, &clk)
+	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, spi_imx->speed_hz, max, &clk)
 		<< MX21_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
-	reg |= config->bpw - 1;
+	reg |= spi_imx->bits_per_word - 1;
 
 	if (spi->mode & SPI_CPHA)
 		reg |= MX21_CSPICTRL_PHA;
@@ -661,17 +658,17 @@ static void mx1_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx1_config(struct spi_device *spi, struct spi_imx_config *config)
+static int mx1_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz, &clk) <<
+	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->speed_hz, &clk) <<
 		MX1_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
-	reg |= config->bpw - 1;
+	reg |= spi_imx->bits_per_word - 1;
 
 	if (spi->mode & SPI_CPHA)
 		reg |= MX1_CSPICTRL_PHA;
@@ -887,20 +884,19 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 				 struct spi_transfer *t)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
-	struct spi_imx_config config;
 	int ret;
 
 	if (!t)
 		return 0;
 
-	config.bpw = t->bits_per_word;
-	config.speed_hz  = t->speed_hz;
+	spi_imx->bits_per_word = t->bits_per_word;
+	spi_imx->speed_hz  = t->speed_hz;
 
 	/* Initialize the functions for transfer */
-	if (config.bpw <= 8) {
+	if (spi_imx->bits_per_word <= 8) {
 		spi_imx->rx = spi_imx_buf_rx_u8;
 		spi_imx->tx = spi_imx_buf_tx_u8;
-	} else if (config.bpw <= 16) {
+	} else if (spi_imx->bits_per_word <= 16) {
 		spi_imx->rx = spi_imx_buf_rx_u16;
 		spi_imx->tx = spi_imx_buf_tx_u16;
 	} else {
@@ -915,12 +911,12 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 
 	if (spi_imx->usedma) {
 		ret = spi_imx_dma_configure(spi->master,
-					    spi_imx_bytes_per_word(config.bpw));
+					    spi_imx_bytes_per_word(spi_imx->bits_per_word));
 		if (ret)
 			return ret;
 	}
 
-	spi_imx->devtype_data->config(spi, &config);
+	spi_imx->devtype_data->config(spi);
 
 	return 0;
 }
-- 
2.11.0

[PATCH 4/6] spi: imx: drop bogus unnecessary dma config

[Sascha Hauer]

It's unnecessary to call spi_imx_dma_configure() from probe(). It will
be called later anyway again when an actual DMA transfer is prepared.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/spi-imx.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 3fa5ccfb45a1..0ec8d816e033 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -965,8 +965,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
 		goto err;
 	}
 
-	spi_imx_dma_configure(master, 1);
-
 	init_completion(&spi_imx->dma_rx_completion);
 	init_completion(&spi_imx->dma_tx_completion);
 	master->can_dma = spi_imx_can_dma;
-- 
2.11.0

[PATCH 4/6] spi: imx: drop bogus unnecessary dma config

[Sascha Hauer]

It's unnecessary to call spi_imx_dma_configure() from probe(). It will
be called later anyway again when an actual DMA transfer is prepared.

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
---
 drivers/spi/spi-imx.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 3fa5ccfb45a1..0ec8d816e033 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -965,8 +965,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
 		goto err;
 	}
 
-	spi_imx_dma_configure(master, 1);
-
 	init_completion(&spi_imx->dma_rx_completion);
 	init_completion(&spi_imx->dma_tx_completion);
 	master->can_dma = spi_imx_can_dma;
-- 
2.11.0

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[PATCH 5/6] spi: imx: remove bytes_per_word from private driver struct

[Sascha Hauer]

We already have bits_per_word in the private driver struct and
bytes_per_word can be calculated from it, so remove bits_per_word.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/spi-imx.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 0ec8d816e033..12e5ef7beb0b 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -92,7 +92,6 @@ struct spi_imx_data {
 
 	unsigned int speed_hz;
 	unsigned int bits_per_word;
-	unsigned int bytes_per_word;
 	unsigned int spi_drctl;
 
 	unsigned int count;
@@ -215,9 +214,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 	if (!master->dma_rx)
 		return false;
 
-	bpw = transfer->bits_per_word;
-
-	bpw = spi_imx_bytes_per_word(bpw);
+	bpw = spi_imx_bytes_per_word(transfer->bits_per_word);
 
 	if (bpw != 1 && bpw != 2 && bpw != 4)
 		return false;
@@ -833,15 +830,14 @@ static irqreturn_t spi_imx_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int spi_imx_dma_configure(struct spi_master *master,
-				 int bytes_per_word)
+static int spi_imx_dma_configure(struct spi_master *master)
 {
 	int ret;
 	enum dma_slave_buswidth buswidth;
 	struct dma_slave_config rx = {}, tx = {};
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
 
-	switch (bytes_per_word) {
+	switch (spi_imx_bytes_per_word(spi_imx->bits_per_word)) {
 	case 4:
 		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
 		break;
@@ -875,8 +871,6 @@ static int spi_imx_dma_configure(struct spi_master *master,
 		return ret;
 	}
 
-	spi_imx->bytes_per_word = bytes_per_word;
-
 	return 0;
 }
 
@@ -910,8 +904,7 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 		spi_imx->usedma = 0;
 
 	if (spi_imx->usedma) {
-		ret = spi_imx_dma_configure(spi->master,
-					    spi_imx_bytes_per_word(spi_imx->bits_per_word));
+		ret = spi_imx_dma_configure(spi->master);
 		if (ret)
 			return ret;
 	}
-- 
2.11.0

[PATCH 6/6] spi: imx: rename 'bpw' variables

[Sascha Hauer]

'bpw' is ambiguous and only the context makes sure if bytes_per_word
or bits_per_word is meant. Use the full names instead to make reading
the code easier.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/spi/spi-imx.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 12e5ef7beb0b..e544f45348cc 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -200,27 +200,27 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin,
 	return i;
 }
 
-static int spi_imx_bytes_per_word(const int bpw)
+static int spi_imx_bytes_per_word(const int bits_per_word)
 {
-	return DIV_ROUND_UP(bpw, BITS_PER_BYTE);
+	return DIV_ROUND_UP(bits_per_word, BITS_PER_BYTE);
 }
 
 static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 			 struct spi_transfer *transfer)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
-	unsigned int bpw, i;
+	unsigned int bytes_per_word, i;
 
 	if (!master->dma_rx)
 		return false;
 
-	bpw = spi_imx_bytes_per_word(transfer->bits_per_word);
+	bytes_per_word = spi_imx_bytes_per_word(transfer->bits_per_word);
 
-	if (bpw != 1 && bpw != 2 && bpw != 4)
+	if (bytes_per_word != 1 && bytes_per_word != 2 && bytes_per_word != 4)
 		return false;
 
 	for (i = spi_imx_get_fifosize(spi_imx) / 2; i > 0; i--) {
-		if (!(transfer->len % (i * bpw)))
+		if (!(transfer->len % (i * bytes_per_word)))
 			break;
 	}
 
-- 
2.11.0

Applied "spi: imx: rename 'bpw' variables" to the spi tree

[Mark Brown]

The patch

   spi: imx: rename 'bpw' variables

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 2e312f6cdb02a2707870172473b9dee34f620b93 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 2 Jun 2017 07:38:04 +0200
Subject: [PATCH] spi: imx: rename 'bpw' variables

'bpw' is ambiguous and only the context makes sure if bytes_per_word
or bits_per_word is meant. Use the full names instead to make reading
the code easier.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 12e5ef7beb0b..e544f45348cc 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -200,27 +200,27 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin,
 	return i;
 }
 
-static int spi_imx_bytes_per_word(const int bpw)
+static int spi_imx_bytes_per_word(const int bits_per_word)
 {
-	return DIV_ROUND_UP(bpw, BITS_PER_BYTE);
+	return DIV_ROUND_UP(bits_per_word, BITS_PER_BYTE);
 }
 
 static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 			 struct spi_transfer *transfer)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
-	unsigned int bpw, i;
+	unsigned int bytes_per_word, i;
 
 	if (!master->dma_rx)
 		return false;
 
-	bpw = spi_imx_bytes_per_word(transfer->bits_per_word);
+	bytes_per_word = spi_imx_bytes_per_word(transfer->bits_per_word);
 
-	if (bpw != 1 && bpw != 2 && bpw != 4)
+	if (bytes_per_word != 1 && bytes_per_word != 2 && bytes_per_word != 4)
 		return false;
 
 	for (i = spi_imx_get_fifosize(spi_imx) / 2; i > 0; i--) {
-		if (!(transfer->len % (i * bpw)))
+		if (!(transfer->len % (i * bytes_per_word)))
 			break;
 	}
 
-- 
2.11.0

Applied "spi: imx: rename 'bpw' variables" to the spi tree

[Mark Brown]

The patch

   spi: imx: rename 'bpw' variables

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 2e312f6cdb02a2707870172473b9dee34f620b93 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Date: Fri, 2 Jun 2017 07:38:04 +0200
Subject: [PATCH] spi: imx: rename 'bpw' variables

'bpw' is ambiguous and only the context makes sure if bytes_per_word
or bits_per_word is meant. Use the full names instead to make reading
the code easier.

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/spi/spi-imx.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 12e5ef7beb0b..e544f45348cc 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -200,27 +200,27 @@ static unsigned int spi_imx_clkdiv_2(unsigned int fin,
 	return i;
 }
 
-static int spi_imx_bytes_per_word(const int bpw)
+static int spi_imx_bytes_per_word(const int bits_per_word)
 {
-	return DIV_ROUND_UP(bpw, BITS_PER_BYTE);
+	return DIV_ROUND_UP(bits_per_word, BITS_PER_BYTE);
 }
 
 static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 			 struct spi_transfer *transfer)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
-	unsigned int bpw, i;
+	unsigned int bytes_per_word, i;
 
 	if (!master->dma_rx)
 		return false;
 
-	bpw = spi_imx_bytes_per_word(transfer->bits_per_word);
+	bytes_per_word = spi_imx_bytes_per_word(transfer->bits_per_word);
 
-	if (bpw != 1 && bpw != 2 && bpw != 4)
+	if (bytes_per_word != 1 && bytes_per_word != 2 && bytes_per_word != 4)
 		return false;
 
 	for (i = spi_imx_get_fifosize(spi_imx) / 2; i > 0; i--) {
-		if (!(transfer->len % (i * bpw)))
+		if (!(transfer->len % (i * bytes_per_word)))
 			break;
 	}
 
-- 
2.11.0

--
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Applied "spi: imx: remove bytes_per_word from private driver struct" to the spi tree

[Mark Brown]

The patch

   spi: imx: remove bytes_per_word from private driver struct

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 65017ee2cd69bfd9ccdaa1f61b220e9717408106 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 2 Jun 2017 07:38:03 +0200
Subject: [PATCH] spi: imx: remove bytes_per_word from private driver struct

We already have bits_per_word in the private driver struct and
bytes_per_word can be calculated from it, so remove bits_per_word.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 0ec8d816e033..12e5ef7beb0b 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -92,7 +92,6 @@ struct spi_imx_data {
 
 	unsigned int speed_hz;
 	unsigned int bits_per_word;
-	unsigned int bytes_per_word;
 	unsigned int spi_drctl;
 
 	unsigned int count;
@@ -215,9 +214,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 	if (!master->dma_rx)
 		return false;
 
-	bpw = transfer->bits_per_word;
-
-	bpw = spi_imx_bytes_per_word(bpw);
+	bpw = spi_imx_bytes_per_word(transfer->bits_per_word);
 
 	if (bpw != 1 && bpw != 2 && bpw != 4)
 		return false;
@@ -833,15 +830,14 @@ static irqreturn_t spi_imx_isr(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
-static int spi_imx_dma_configure(struct spi_master *master,
-				 int bytes_per_word)
+static int spi_imx_dma_configure(struct spi_master *master)
 {
 	int ret;
 	enum dma_slave_buswidth buswidth;
 	struct dma_slave_config rx = {}, tx = {};
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
 
-	switch (bytes_per_word) {
+	switch (spi_imx_bytes_per_word(spi_imx->bits_per_word)) {
 	case 4:
 		buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
 		break;
@@ -875,8 +871,6 @@ static int spi_imx_dma_configure(struct spi_master *master,
 		return ret;
 	}
 
-	spi_imx->bytes_per_word = bytes_per_word;
-
 	return 0;
 }
 
@@ -910,8 +904,7 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 		spi_imx->usedma = 0;
 
 	if (spi_imx->usedma) {
-		ret = spi_imx_dma_configure(spi->master,
-					    spi_imx_bytes_per_word(spi_imx->bits_per_word));
+		ret = spi_imx_dma_configure(spi->master);
 		if (ret)
 			return ret;
 	}
-- 
2.11.0

Applied "spi: imx: drop bogus unnecessary dma config" to the spi tree

[Mark Brown]

The patch

   spi: imx: drop bogus unnecessary dma config

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d6be7d1db51799fb510458b8ede6e5bef96ab1f0 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 2 Jun 2017 07:38:02 +0200
Subject: [PATCH] spi: imx: drop bogus unnecessary dma config

It's unnecessary to call spi_imx_dma_configure() from probe(). It will
be called later anyway again when an actual DMA transfer is prepared.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 3fa5ccfb45a1..0ec8d816e033 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -965,8 +965,6 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx,
 		goto err;
 	}
 
-	spi_imx_dma_configure(master, 1);
-
 	init_completion(&spi_imx->dma_rx_completion);
 	init_completion(&spi_imx->dma_tx_completion);
 	master->can_dma = spi_imx_can_dma;
-- 
2.11.0

Applied "spi: imx: put struct spi_imx_config members into driver private struct" to the spi tree

[Mark Brown]

The patch

   spi: imx: put struct spi_imx_config members into driver private struct

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From d52345b6cf8ecd2c765edf81f49fa62483dd6437 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 2 Jun 2017 07:38:01 +0200
Subject: [PATCH] spi: imx: put struct spi_imx_config members into driver
 private struct

struct spi_imx_config used to hold data specific to the current
transfer. However, other data is in the drivers private data struct.
Let's drop struct spi_imx_config and put the variables into the
drivers private data struct aswell.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 50 +++++++++++++++++++++++---------------------------
 1 file changed, 23 insertions(+), 27 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index e3bc3d51a2d6..3fa5ccfb45a1 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -56,10 +56,6 @@
 
 /* The maximum  bytes that a sdma BD can transfer.*/
 #define MAX_SDMA_BD_BYTES  (1 << 15)
-struct spi_imx_config {
-	unsigned int speed_hz;
-	unsigned int bpw;
-};
 
 enum spi_imx_devtype {
 	IMX1_CSPI,
@@ -74,7 +70,7 @@ struct spi_imx_data;
 
 struct spi_imx_devtype_data {
 	void (*intctrl)(struct spi_imx_data *, int);
-	int (*config)(struct spi_device *, struct spi_imx_config *);
+	int (*config)(struct spi_device *);
 	void (*trigger)(struct spi_imx_data *);
 	int (*rx_available)(struct spi_imx_data *);
 	void (*reset)(struct spi_imx_data *);
@@ -94,6 +90,8 @@ struct spi_imx_data {
 	unsigned long spi_clk;
 	unsigned int spi_bus_clk;
 
+	unsigned int speed_hz;
+	unsigned int bits_per_word;
 	unsigned int bytes_per_word;
 	unsigned int spi_drctl;
 
@@ -335,12 +333,11 @@ static void mx51_ecspi_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MX51_ECSPI_CTRL);
 }
 
-static int mx51_ecspi_config(struct spi_device *spi,
-			     struct spi_imx_config *config)
+static int mx51_ecspi_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	u32 ctrl = MX51_ECSPI_CTRL_ENABLE;
-	u32 clk = config->speed_hz, delay, reg;
+	u32 clk = spi_imx->speed_hz, delay, reg;
 	u32 cfg = readl(spi_imx->base + MX51_ECSPI_CONFIG);
 
 	/*
@@ -359,13 +356,13 @@ static int mx51_ecspi_config(struct spi_device *spi,
 		ctrl |= MX51_ECSPI_CTRL_DRCTL(spi_imx->spi_drctl);
 
 	/* set clock speed */
-	ctrl |= mx51_ecspi_clkdiv(spi_imx, config->speed_hz, &clk);
+	ctrl |= mx51_ecspi_clkdiv(spi_imx, spi_imx->speed_hz, &clk);
 	spi_imx->spi_bus_clk = clk;
 
 	/* set chip select to use */
 	ctrl |= MX51_ECSPI_CTRL_CS(spi->chip_select);
 
-	ctrl |= (config->bpw - 1) << MX51_ECSPI_CTRL_BL_OFFSET;
+	ctrl |= (spi_imx->bits_per_word - 1) << MX51_ECSPI_CTRL_BL_OFFSET;
 
 	cfg |= MX51_ECSPI_CONFIG_SBBCTRL(spi->chip_select);
 
@@ -496,21 +493,21 @@ static void mx31_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx31_config(struct spi_device *spi, struct spi_imx_config *config)
+static int mx31_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz, &clk) <<
+	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->speed_hz, &clk) <<
 		MX31_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
 	if (is_imx35_cspi(spi_imx)) {
-		reg |= (config->bpw - 1) << MX35_CSPICTRL_BL_SHIFT;
+		reg |= (spi_imx->bits_per_word - 1) << MX35_CSPICTRL_BL_SHIFT;
 		reg |= MX31_CSPICTRL_SSCTL;
 	} else {
-		reg |= (config->bpw - 1) << MX31_CSPICTRL_BC_SHIFT;
+		reg |= (spi_imx->bits_per_word - 1) << MX31_CSPICTRL_BC_SHIFT;
 	}
 
 	if (spi->mode & SPI_CPHA)
@@ -592,18 +589,18 @@ static void mx21_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx21_config(struct spi_device *spi, struct spi_imx_config *config)
+static int mx21_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX21_CSPICTRL_ENABLE | MX21_CSPICTRL_MASTER;
 	unsigned int max = is_imx27_cspi(spi_imx) ? 16 : 18;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, config->speed_hz, max, &clk)
+	reg |= spi_imx_clkdiv_1(spi_imx->spi_clk, spi_imx->speed_hz, max, &clk)
 		<< MX21_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
-	reg |= config->bpw - 1;
+	reg |= spi_imx->bits_per_word - 1;
 
 	if (spi->mode & SPI_CPHA)
 		reg |= MX21_CSPICTRL_PHA;
@@ -661,17 +658,17 @@ static void mx1_trigger(struct spi_imx_data *spi_imx)
 	writel(reg, spi_imx->base + MXC_CSPICTRL);
 }
 
-static int mx1_config(struct spi_device *spi, struct spi_imx_config *config)
+static int mx1_config(struct spi_device *spi)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
 	unsigned int clk;
 
-	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, config->speed_hz, &clk) <<
+	reg |= spi_imx_clkdiv_2(spi_imx->spi_clk, spi_imx->speed_hz, &clk) <<
 		MX1_CSPICTRL_DR_SHIFT;
 	spi_imx->spi_bus_clk = clk;
 
-	reg |= config->bpw - 1;
+	reg |= spi_imx->bits_per_word - 1;
 
 	if (spi->mode & SPI_CPHA)
 		reg |= MX1_CSPICTRL_PHA;
@@ -887,20 +884,19 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 				 struct spi_transfer *t)
 {
 	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
-	struct spi_imx_config config;
 	int ret;
 
 	if (!t)
 		return 0;
 
-	config.bpw = t->bits_per_word;
-	config.speed_hz  = t->speed_hz;
+	spi_imx->bits_per_word = t->bits_per_word;
+	spi_imx->speed_hz  = t->speed_hz;
 
 	/* Initialize the functions for transfer */
-	if (config.bpw <= 8) {
+	if (spi_imx->bits_per_word <= 8) {
 		spi_imx->rx = spi_imx_buf_rx_u8;
 		spi_imx->tx = spi_imx_buf_tx_u8;
-	} else if (config.bpw <= 16) {
+	} else if (spi_imx->bits_per_word <= 16) {
 		spi_imx->rx = spi_imx_buf_rx_u16;
 		spi_imx->tx = spi_imx_buf_tx_u16;
 	} else {
@@ -915,12 +911,12 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 
 	if (spi_imx->usedma) {
 		ret = spi_imx_dma_configure(spi->master,
-					    spi_imx_bytes_per_word(config.bpw));
+					    spi_imx_bytes_per_word(spi_imx->bits_per_word));
 		if (ret)
 			return ret;
 	}
 
-	spi_imx->devtype_data->config(spi, &config);
+	spi_imx->devtype_data->config(spi);
 
 	return 0;
 }
-- 
2.11.0

Applied "spi: imx: Drop unnecessary check" to the spi tree

[Mark Brown]

The patch

   spi: imx: Drop unnecessary check

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 494f3193bd8ca6a15a813bf0f8b5552ec0d173f3 Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 2 Jun 2017 07:38:00 +0200
Subject: [PATCH] spi: imx: Drop unnecessary check

__spi_validate makes sure that every transfer has a valid bits_per_word
and speed_hz setting. We do not need to fallback to values from the
spi_device.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index 4b5cd0c84450..e3bc3d51a2d6 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -218,8 +218,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 		return false;
 
 	bpw = transfer->bits_per_word;
-	if (!bpw)
-		bpw = spi->bits_per_word;
 
 	bpw = spi_imx_bytes_per_word(bpw);
 
@@ -898,11 +896,6 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	config.bpw = t->bits_per_word;
 	config.speed_hz  = t->speed_hz;
 
-	if (!config.speed_hz)
-		config.speed_hz = spi->max_speed_hz;
-	if (!config.bpw)
-		config.bpw = spi->bits_per_word;
-
 	/* Initialize the functions for transfer */
 	if (config.bpw <= 8) {
 		spi_imx->rx = spi_imx_buf_rx_u8;
-- 
2.11.0

Applied "spi: imx: Nothing to do in setupxfer when transfer is NULL" to the spi tree

[Mark Brown]

The patch

   spi: imx: Nothing to do in setupxfer when transfer is NULL

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From abb1ff195a21094f3bfb1cf8d425ff360d8a89ee Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer@pengutronix.de>
Date: Fri, 2 Jun 2017 07:37:59 +0200
Subject: [PATCH] spi: imx: Nothing to do in setupxfer when transfer is NULL

When the spi_transfer given in spi_imx_setupxfer is NULL then
we have nothing to do. Bail out early in this case so that
we do not have to test for t != NULL multiple times later.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-imx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index b402530a7a9a..4b5cd0c84450 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -217,9 +217,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 	if (!master->dma_rx)
 		return false;
 
-	if (!transfer)
-		return false;
-
 	bpw = transfer->bits_per_word;
 	if (!bpw)
 		bpw = spi->bits_per_word;
@@ -895,8 +892,11 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	struct spi_imx_config config;
 	int ret;
 
-	config.bpw = t ? t->bits_per_word : spi->bits_per_word;
-	config.speed_hz  = t ? t->speed_hz : spi->max_speed_hz;
+	if (!t)
+		return 0;
+
+	config.bpw = t->bits_per_word;
+	config.speed_hz  = t->speed_hz;
 
 	if (!config.speed_hz)
 		config.speed_hz = spi->max_speed_hz;
-- 
2.11.0

Applied "spi: imx: Nothing to do in setupxfer when transfer is NULL" to the spi tree

[Mark Brown]

The patch

   spi: imx: Nothing to do in setupxfer when transfer is NULL

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From abb1ff195a21094f3bfb1cf8d425ff360d8a89ee Mon Sep 17 00:00:00 2001
From: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Date: Fri, 2 Jun 2017 07:37:59 +0200
Subject: [PATCH] spi: imx: Nothing to do in setupxfer when transfer is NULL

When the spi_transfer given in spi_imx_setupxfer is NULL then
we have nothing to do. Bail out early in this case so that
we do not have to test for t != NULL multiple times later.

Signed-off-by: Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/spi/spi-imx.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c
index b402530a7a9a..4b5cd0c84450 100644
--- a/drivers/spi/spi-imx.c
+++ b/drivers/spi/spi-imx.c
@@ -217,9 +217,6 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi,
 	if (!master->dma_rx)
 		return false;
 
-	if (!transfer)
-		return false;
-
 	bpw = transfer->bits_per_word;
 	if (!bpw)
 		bpw = spi->bits_per_word;
@@ -895,8 +892,11 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 	struct spi_imx_config config;
 	int ret;
 
-	config.bpw = t ? t->bits_per_word : spi->bits_per_word;
-	config.speed_hz  = t ? t->speed_hz : spi->max_speed_hz;
+	if (!t)
+		return 0;
+
+	config.bpw = t->bits_per_word;
+	config.speed_hz  = t->speed_hz;
 
 	if (!config.speed_hz)
 		config.speed_hz = spi->max_speed_hz;
-- 
2.11.0

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