IIO : ADC: tiadc: Add support of TI's ADC driver
This patch adds support for TI's ADC driver.
This is a multifunctional device.
Analog input lines are provided on which
voltage measurements can be carried out.
You can have upto 8 input lines.
Signed-off-by: Patil, Rachna <rachna@ti.com>
Acked-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/mfd/ti_am335x_tscadc.c b/drivers/mfd/ti_am335x_tscadc.c
index d812be4..e947dd8 100644
--- a/drivers/mfd/ti_am335x_tscadc.c
+++ b/drivers/mfd/ti_am335x_tscadc.c
@@ -25,6 +25,7 @@
#include <linux/mfd/ti_am335x_tscadc.h>
#include <linux/input/ti_am335x_tsc.h>
+#include <linux/platform_data/ti_am335x_adc.h>
static unsigned int tscadc_readl(struct ti_tscadc_dev *tsadc, unsigned int reg)
{
@@ -67,14 +68,23 @@
int irq;
int err, ctrl;
int clk_value, clock_rate;
- int tsc_wires;
+ int tsc_wires, adc_channels = 0, total_channels;
if (!pdata) {
dev_err(&pdev->dev, "Could not find platform data\n");
return -EINVAL;
}
+ if (pdata->adc_init)
+ adc_channels = pdata->adc_init->adc_channels;
+
tsc_wires = pdata->tsc_init->wires;
+ total_channels = tsc_wires + adc_channels;
+
+ if (total_channels > 8) {
+ dev_err(&pdev->dev, "Number of i/p channels more than 8\n");
+ return -EINVAL;
+ }
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -172,6 +182,12 @@
cell->platform_data = tscadc;
cell->pdata_size = sizeof(*tscadc);
+ /* ADC Cell */
+ cell = &tscadc->cells[ADC_CELL];
+ cell->name = "tiadc";
+ cell->platform_data = tscadc;
+ cell->pdata_size = sizeof(*tscadc);
+
err = mfd_add_devices(&pdev->dev, pdev->id, tscadc->cells,
TSCADC_CELLS, NULL, 0, NULL);
if (err < 0)
