spi: imx: rename config callback and add useful parameters

The config callback is called once per transfer while some things can (and
should) be done on a per message manner. To have unambiguous naming in the
end include "transfer" in the callback's name and rename the
implementations accordingly. Also pass the driver struct and transfer
which allows further simplifications in the following patch.

There is no change in behavior intended here.
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-imx.c

@@ -60,7 +60,8 @@ struct spi_imx_data;
 struct spi_imx_devtype_data {
 	void (*intctrl)(struct spi_imx_data *, int);
 	int (*prepare_message)(struct spi_imx_data *, struct spi_message *);
-	int (*config)(struct spi_device *);
+	int (*prepare_transfer)(struct spi_imx_data *, struct spi_device *,
+				struct spi_transfer *);
 	void (*trigger)(struct spi_imx_data *);
 	int (*rx_available)(struct spi_imx_data *);
 	void (*reset)(struct spi_imx_data *);
@@ -556,9 +557,10 @@ static int mx51_ecspi_prepare_message(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx51_ecspi_config(struct spi_device *spi)
+static int mx51_ecspi_prepare_transfer(struct spi_imx_data *spi_imx,
+				       struct spi_device *spi,
+				       struct spi_transfer *t)
 {
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	u32 ctrl = readl(spi_imx->base + MX51_ECSPI_CTRL);
 	u32 clk = spi_imx->speed_hz, delay;
 
@@ -685,9 +687,10 @@ static int mx31_prepare_message(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx31_config(struct spi_device *spi)
+static int mx31_prepare_transfer(struct spi_imx_data *spi_imx,
+				 struct spi_device *spi,
+				 struct spi_transfer *t)
 {
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX31_CSPICTRL_ENABLE | MX31_CSPICTRL_MASTER;
 	unsigned int clk;
 
@@ -789,9 +792,10 @@ static int mx21_prepare_message(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx21_config(struct spi_device *spi)
+static int mx21_prepare_transfer(struct spi_imx_data *spi_imx,
+				 struct spi_device *spi,
+				 struct spi_transfer *t)
 {
-	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;
@@ -864,9 +868,10 @@ static int mx1_prepare_message(struct spi_imx_data *spi_imx,
 	return 0;
 }
 
-static int mx1_config(struct spi_device *spi)
+static int mx1_prepare_transfer(struct spi_imx_data *spi_imx,
+				struct spi_device *spi,
+				struct spi_transfer *t)
 {
-	struct spi_imx_data *spi_imx = spi_master_get_devdata(spi->master);
 	unsigned int reg = MX1_CSPICTRL_ENABLE | MX1_CSPICTRL_MASTER;
 	unsigned int clk;
 
@@ -899,7 +904,7 @@ static void mx1_reset(struct spi_imx_data *spi_imx)
 static struct spi_imx_devtype_data imx1_cspi_devtype_data = {
 	.intctrl = mx1_intctrl,
 	.prepare_message = mx1_prepare_message,
-	.config = mx1_config,
+	.prepare_transfer = mx1_prepare_transfer,
 	.trigger = mx1_trigger,
 	.rx_available = mx1_rx_available,
 	.reset = mx1_reset,
@@ -913,7 +918,7 @@ static struct spi_imx_devtype_data imx1_cspi_devtype_data = {
 static struct spi_imx_devtype_data imx21_cspi_devtype_data = {
 	.intctrl = mx21_intctrl,
 	.prepare_message = mx21_prepare_message,
-	.config = mx21_config,
+	.prepare_transfer = mx21_prepare_transfer,
 	.trigger = mx21_trigger,
 	.rx_available = mx21_rx_available,
 	.reset = mx21_reset,
@@ -928,7 +933,7 @@ static struct spi_imx_devtype_data imx27_cspi_devtype_data = {
 	/* i.mx27 cspi shares the functions with i.mx21 one */
 	.intctrl = mx21_intctrl,
 	.prepare_message = mx21_prepare_message,
-	.config = mx21_config,
+	.prepare_transfer = mx21_prepare_transfer,
 	.trigger = mx21_trigger,
 	.rx_available = mx21_rx_available,
 	.reset = mx21_reset,
@@ -942,7 +947,7 @@ static struct spi_imx_devtype_data imx27_cspi_devtype_data = {
 static struct spi_imx_devtype_data imx31_cspi_devtype_data = {
 	.intctrl = mx31_intctrl,
 	.prepare_message = mx31_prepare_message,
-	.config = mx31_config,
+	.prepare_transfer = mx31_prepare_transfer,
 	.trigger = mx31_trigger,
 	.rx_available = mx31_rx_available,
 	.reset = mx31_reset,
@@ -957,7 +962,7 @@ static struct spi_imx_devtype_data imx35_cspi_devtype_data = {
 	/* i.mx35 and later cspi shares the functions with i.mx31 one */
 	.intctrl = mx31_intctrl,
 	.prepare_message = mx31_prepare_message,
-	.config = mx31_config,
+	.prepare_transfer = mx31_prepare_transfer,
 	.trigger = mx31_trigger,
 	.rx_available = mx31_rx_available,
 	.reset = mx31_reset,
@@ -971,7 +976,7 @@ static struct spi_imx_devtype_data imx35_cspi_devtype_data = {
 static struct spi_imx_devtype_data imx51_ecspi_devtype_data = {
 	.intctrl = mx51_ecspi_intctrl,
 	.prepare_message = mx51_ecspi_prepare_message,
-	.config = mx51_ecspi_config,
+	.prepare_transfer = mx51_ecspi_prepare_transfer,
 	.trigger = mx51_ecspi_trigger,
 	.rx_available = mx51_ecspi_rx_available,
 	.reset = mx51_ecspi_reset,
@@ -987,7 +992,7 @@ static struct spi_imx_devtype_data imx51_ecspi_devtype_data = {
 static struct spi_imx_devtype_data imx53_ecspi_devtype_data = {
 	.intctrl = mx51_ecspi_intctrl,
 	.prepare_message = mx51_ecspi_prepare_message,
-	.config = mx51_ecspi_config,
+	.prepare_transfer = mx51_ecspi_prepare_transfer,
 	.trigger = mx51_ecspi_trigger,
 	.rx_available = mx51_ecspi_rx_available,
 	.reset = mx51_ecspi_reset,
@@ -1230,7 +1235,7 @@ static int spi_imx_setupxfer(struct spi_device *spi,
 		spi_imx->slave_burst = t->len;
 	}
 
-	spi_imx->devtype_data->config(spi);
+	spi_imx->devtype_data->prepare_transfer(spi_imx, spi, t);
 
 	return 0;
 }