mfd: stmpe: Add STMPE_IDX_SYS_CTRL/2 enum

As STMPE1801/1601/24xx has a SYS_CTRL register and
STMPE1601/2403 has even a SYS_CTRL2 register, add
STMPE_IDX_SYS_CTRL/2 and update driver code accordingly

This update prepares the ground for not yet supported STMPE1600
which share similar REG_SYS_CTRL register.

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h
index de748bc7525e..eb8b73bd139f 100644
--- a/include/linux/mfd/stmpe.h
+++ b/include/linux/mfd/stmpe.h
@@ -39,6 +39,8 @@ enum stmpe_partnum {
  */
 enum {
         STMPE_IDX_CHIP_ID,
+        STMPE_IDX_SYS_CTRL,
+        STMPE_IDX_SYS_CTRL2,
         STMPE_IDX_ICR_LSB,
         STMPE_IDX_IER_LSB,
         STMPE_IDX_ISR_LSB,