[PATCH v2 7/7] Input: iqs7222 - add support for IQS7222A v1.13+

[Jeff LaBundy <jeff@labundy.com>]

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>
---
Changes in v2:
 - Rebased to account for changes earlier in series

 drivers/input/misc/iqs7222.c | 111 +++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)

diff --git a/drivers/input/misc/iqs7222.c b/drivers/input/misc/iqs7222.c
index 0a592b90f471..3340de51fb2d 100644
--- 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",
 	},
@@ -2133,8 +2234,18 @@ 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;
 
-- 
2.34.1