mfd: ti_tscadc: deal with partial activation

Fix the mfd device in the case where a subdevice might not be activated.

Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

1 files changed, 3 insertions, 5 deletions

diff --git a/include/linux/mfd/ti_am335x_tscadc.h b/include/linux/mfd/ti_am335x_tscadc.h
index e36ae4184917..fe54ba4a3b2f 100644
--- a/include/linux/mfd/ti_am335x_tscadc.h
+++ b/include/linux/mfd/ti_am335x_tscadc.h
@@ -120,11 +120,6 @@
 
 #define TSCADC_CELLS            2
 
-enum tscadc_cells {
-        TSC_CELL,
-        ADC_CELL,
-};
-
 struct mfd_tscadc_board {
         struct tsc_data *tsc_init;
         struct adc_data *adc_init;
@@ -135,6 +130,9 @@ struct ti_tscadc_dev {
         struct regmap *regmap_tscadc;
         void __iomem *tscadc_base;
         int irq;
+        int used_cells; /* 1-2 */
+        int tsc_cell;   /* -1 if not used */
+        int adc_cell;   /* -1 if not used */
         struct mfd_cell cells[TSCADC_CELLS];
         u32 reg_se_cache;
         spinlock_t reg_lock;