mfd: ti_am335x_tscadc: Drop useless variables from the driver structure

Keeping the count of tsc_cells and adc_cells is completely redundant, we
can derive this information from other variables. Plus, these variables
are not used anywhere else now. Let's get rid of them.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20211015081506.933180-20-miquel.raynal@bootlin.com

drivers/mfd/ti_am335x_tscadc.c

@@ -122,7 +122,7 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
 	const __be32 *cur;
 	u32 val;
 	int err, ctrl;
-	int tsc_wires = 0, adc_channels = 0, total_channels;
+	int tsc_wires = 0, adc_channels = 0, cell_idx = 0, total_channels;
 	int readouts = 0;
 
 	/* Allocate memory for device */
@@ -235,14 +235,9 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
 	ctrl |= CNTRLREG_TSCSSENB;
 	regmap_write(tscadc->regmap, REG_CTRL, ctrl);
 
-	tscadc->used_cells = 0;
-	tscadc->tsc_cell = -1;
-	tscadc->adc_cell = -1;
-
 	/* TSC Cell */
 	if (tsc_wires > 0) {
-		tscadc->tsc_cell = tscadc->used_cells;
-		cell = &tscadc->cells[tscadc->used_cells++];
+		cell = &tscadc->cells[cell_idx++];
 		cell->name = tscadc->data->secondary_feature_name;
 		cell->of_compatible = tscadc->data->secondary_feature_compatible;
 		cell->platform_data = &tscadc;
@@ -251,8 +246,7 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
 
 	/* ADC Cell */
 	if (adc_channels > 0) {
-		tscadc->adc_cell = tscadc->used_cells;
-		cell = &tscadc->cells[tscadc->used_cells++];
+		cell = &tscadc->cells[cell_idx++];
 		cell->name = tscadc->data->adc_feature_name;
 		cell->of_compatible = tscadc->data->adc_feature_compatible;
 		cell->platform_data = &tscadc;
@@ -260,8 +254,7 @@ static	int ti_tscadc_probe(struct platform_device *pdev)
 	}
 
 	err = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
-			      tscadc->cells, tscadc->used_cells, NULL,
-			      0, NULL);
+			      tscadc->cells, cell_idx, NULL, 0, NULL);
 	if (err < 0)
 		goto err_disable_clk;
 

include/linux/mfd/ti_am335x_tscadc.h

@@ -177,10 +177,7 @@ struct ti_tscadc_dev {
 	phys_addr_t tscadc_phys_base;
 	const struct ti_tscadc_data *data;
 	int irq;
-	int used_cells;	/* 1-2 */
 	int tsc_wires;
-	int tsc_cell;	/* -1 if not used */
-	int adc_cell;	/* -1 if not used */
 	struct mfd_cell cells[TSCADC_CELLS];
 	u32 reg_se_cache;
 	bool adc_waiting;