soc: pinctrl-lpi: Add support to read lpi offset from device tree

In order to support variable lpi offsets from different chipsets
read the lpi offset values of gpio groups from device tree. Any
target which uses LPI has to define this gpio offset table
in device tree.

Change-Id: I3bd54017e4571deb9a189cfd6903698887a6413a
Signed-off-by: Aditya Bavanari <[email protected]>

soc/pinctrl-lpi.c

@@ -105,40 +105,8 @@ static const char *const lpi_gpio_groups[] = {
 	"gpio29", "gpio30", "gpio31",
 };
 
-static const u32 lpi_offset[] = {
-	0x00000000,
-	0x00001000,
-	0x00002000,
-	0x00003000,
-	0x00004000,
-	0x00005000,
-	0x00006000,
-	0x00007000,
-	0x00008000,
-	0x00009000,
-	0x0000A000,
-	0x0000B000,
-	0x0000C000,
-	0x0000D000,
-	0x0000E000,
-	0x0000F000,
-	0x00010000,
-	0x00011000,
-	0x00012000,
-	0x00013000,
-	0x00014000,
-	0x00015000,
-	0x00016000,
-	0x00017000,
-	0x00018000,
-	0x00019000,
-	0x0001A000,
-	0x0001B000,
-	0x0001C000,
-	0x0001D000,
-	0x0001E000,
-	0x0001F000,
-};
+#define LPI_TLMM_MAX_PINS 100
+static u32 lpi_offset[LPI_TLMM_MAX_PINS];
 
 static const char *const lpi_gpio_functions[] = {
 	[LPI_GPIO_FUNC_INDEX_GPIO]	= LPI_GPIO_FUNC_GPIO,
@@ -531,6 +499,13 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
 
 	WARN_ON(npins > ARRAY_SIZE(lpi_gpio_groups));
 
+	ret = of_property_read_u32_array(dev->of_node, "qcom,lpi-offset-tbl",
+					 lpi_offset, npins);
+	if (ret < 0) {
+		dev_err(dev, "error in reading lpi offset table: %d\n", ret);
+		return ret;
+	}
+
 	state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
 	if (!state)
 		return -ENOMEM;