Input: iqs7222 - add support for IQS7222A v1.13+

IQS7222A revisions 1.13 and later widen the gesture multiplier from
x4 ms to x16 ms. Add a means to scale the gesture timings specified
in the device tree based on the revision of the device.

Fixes: e505edaedcb9 ("Input: add support for Azoteq IQS7222A/B/C")
Signed-off-by: Jeff LaBundy <jeff@labundy.com>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/Y1SRdbK1Dp2q7O8o@nixie71
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c
index 6af25dfd1d2a4543386a02cc189c0175be3aa73d..e47ab6c1177f554d5ab4a1003b457414097bfbce 100644 (file)
--- a/drivers/input/misc/iqs7222.c
+++ b/drivers/input/misc/iqs7222.c
@@ -86,7 +86,9 @@ enum iqs7222_reg_key_id {
        IQS7222_REG_KEY_TOUCH,
        IQS7222_REG_KEY_DEBOUNCE,
        IQS7222_REG_KEY_TAP,
+       IQS7222_REG_KEY_TAP_LEGACY,
        IQS7222_REG_KEY_AXIAL,
+       IQS7222_REG_KEY_AXIAL_LEGACY,
        IQS7222_REG_KEY_WHEEL,
        IQS7222_REG_KEY_NO_WHEEL,
        IQS7222_REG_KEY_RESERVED
@@ -202,10 +204,68 @@ struct iqs7222_dev_desc {
        int allow_offset;
        int event_offset;
        int comms_offset;
+       bool legacy_gesture;
        struct iqs7222_reg_grp_desc reg_grps[IQS7222_NUM_REG_GRPS];
 };
 
 static const struct iqs7222_dev_desc iqs7222_devs[] = {
+       {
+               .prod_num = IQS7222_PROD_NUM_A,
+               .fw_major = 1,
+               .fw_minor = 13,
+               .sldr_res = U8_MAX * 16,
+               .touch_link = 1768,
+               .allow_offset = 9,
+               .event_offset = 10,
+               .comms_offset = 12,
+               .reg_grps = {
+                       [IQS7222_REG_GRP_STAT] = {
+                               .base = IQS7222_SYS_STATUS,
+                               .num_row = 1,
+                               .num_col = 8,
+                       },
+                       [IQS7222_REG_GRP_CYCLE] = {
+                               .base = 0x8000,
+                               .num_row = 7,
+                               .num_col = 3,
+                       },
+                       [IQS7222_REG_GRP_GLBL] = {
+                               .base = 0x8700,
+                               .num_row = 1,
+                               .num_col = 3,
+                       },
+                       [IQS7222_REG_GRP_BTN] = {
+                               .base = 0x9000,
+                               .num_row = 12,
+                               .num_col = 3,
+                       },
+                       [IQS7222_REG_GRP_CHAN] = {
+                               .base = 0xA000,
+                               .num_row = 12,
+                               .num_col = 6,
+                       },
+                       [IQS7222_REG_GRP_FILT] = {
+                               .base = 0xAC00,
+                               .num_row = 1,
+                               .num_col = 2,
+                       },
+                       [IQS7222_REG_GRP_SLDR] = {
+                               .base = 0xB000,
+                               .num_row = 2,
+                               .num_col = 11,
+                       },
+                       [IQS7222_REG_GRP_GPIO] = {
+                               .base = 0xC000,
+                               .num_row = 1,
+                               .num_col = 3,
+                       },
+                       [IQS7222_REG_GRP_SYS] = {
+                               .base = IQS7222_SYS_SETUP,
+                               .num_row = 1,
+                               .num_col = 13,
+                       },
+               },
+       },
        {
                .prod_num = IQS7222_PROD_NUM_A,
                .fw_major = 1,
@@ -215,6 +275,7 @@ static const struct iqs7222_dev_desc iqs7222_devs[] = {
                .allow_offset = 9,
                .event_offset = 10,
                .comms_offset = 12,
+               .legacy_gesture = true,
                .reg_grps = {
                        [IQS7222_REG_GRP_STAT] = {
                                .base = IQS7222_SYS_STATUS,
@@ -874,6 +935,16 @@ static const struct iqs7222_prop_desc iqs7222_props[] = {
                .reg_offset = 9,
                .reg_shift = 8,
                .reg_width = 8,
+               .val_pitch = 16,
+               .label = "maximum gesture time",
+       },
+       {
+               .name = "azoteq,gesture-max-ms",
+               .reg_grp = IQS7222_REG_GRP_SLDR,
+               .reg_key = IQS7222_REG_KEY_TAP_LEGACY,
+               .reg_offset = 9,
+               .reg_shift = 8,
+               .reg_width = 8,
                .val_pitch = 4,
                .label = "maximum gesture time",
        },
@@ -884,6 +955,16 @@ static const struct iqs7222_prop_desc iqs7222_props[] = {
                .reg_offset = 9,
                .reg_shift = 3,
                .reg_width = 5,
+               .val_pitch = 16,
+               .label = "minimum gesture time",
+       },
+       {
+               .name = "azoteq,gesture-min-ms",
+               .reg_grp = IQS7222_REG_GRP_SLDR,
+               .reg_key = IQS7222_REG_KEY_TAP_LEGACY,
+               .reg_offset = 9,
+               .reg_shift = 3,
+               .reg_width = 5,
                .val_pitch = 4,
                .label = "minimum gesture time",
        },
@@ -897,6 +978,16 @@ static const struct iqs7222_prop_desc iqs7222_props[] = {
                .val_pitch = 16,
                .label = "gesture distance",
        },
+       {
+               .name = "azoteq,gesture-dist",
+               .reg_grp = IQS7222_REG_GRP_SLDR,
+               .reg_key = IQS7222_REG_KEY_AXIAL_LEGACY,
+               .reg_offset = 10,
+               .reg_shift = 8,
+               .reg_width = 8,
+               .val_pitch = 16,
+               .label = "gesture distance",
+       },
        {
                .name = "azoteq,gesture-max-ms",
                .reg_grp = IQS7222_REG_GRP_SLDR,
@@ -904,6 +995,16 @@ static const struct iqs7222_prop_desc iqs7222_props[] = {
                .reg_offset = 10,
                .reg_shift = 0,
                .reg_width = 8,
+               .val_pitch = 16,
+               .label = "maximum gesture time",
+       },
+       {
+               .name = "azoteq,gesture-max-ms",
+               .reg_grp = IQS7222_REG_GRP_SLDR,
+               .reg_key = IQS7222_REG_KEY_AXIAL_LEGACY,
+               .reg_offset = 10,
+               .reg_shift = 0,
+               .reg_width = 8,
                .val_pitch = 4,
                .label = "maximum gesture time",
        },
@@ -2115,8 +2216,18 @@ static int iqs7222_parse_sldr(struct iqs7222_private *iqs7222,
                if (!event_node)
                        continue;
 
+               /*
+                * Depending on the device, gestures are either offered using
+                * one of two timing resolutions, or are not supported at all.
+                */
                if (reg_offset)
                        reg_key = IQS7222_REG_KEY_RESERVED;
+               else if (dev_desc->legacy_gesture &&
+                        iqs7222_sl_events[i].reg_key == IQS7222_REG_KEY_TAP)
+                       reg_key = IQS7222_REG_KEY_TAP_LEGACY;
+               else if (dev_desc->legacy_gesture &&
+                        iqs7222_sl_events[i].reg_key == IQS7222_REG_KEY_AXIAL)
+                       reg_key = IQS7222_REG_KEY_AXIAL_LEGACY;
                else
                        reg_key = iqs7222_sl_events[i].reg_key;