[PATCH 2/2] pinctrl: qcom: sc8180x: add ACPI probe support

[Shawn Guo <shawn.guo@xxxxxxxxxx>]

It adds ACPI probe support with tile offsets passed over to msm core
driver via sc8180x_tile_offsets, as TLMM is described a single memory
region in ACPI DSDT.

Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx>
---
 drivers/pinctrl/qcom/Kconfig           |  2 +-
 drivers/pinctrl/qcom/pinctrl-sc8180x.c | 48 +++++++++++++++++++++++++-
 2 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index 6853a896c476..9f0218c4f9b3 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -222,7 +222,7 @@ config PINCTRL_SC7280
 
 config PINCTRL_SC8180X
 	tristate "Qualcomm Technologies Inc SC8180x pin controller driver"
-	depends on GPIOLIB && OF
+	depends on GPIOLIB && (OF || ACPI)
 	select PINCTRL_MSM
 	help
 	  This is the pinctrl, pinmux, pinconf and gpiolib driver for the
diff --git a/drivers/pinctrl/qcom/pinctrl-sc8180x.c b/drivers/pinctrl/qcom/pinctrl-sc8180x.c
index b765bf667574..38117ceb4d8f 100644
--- a/drivers/pinctrl/qcom/pinctrl-sc8180x.c
+++ b/drivers/pinctrl/qcom/pinctrl-sc8180x.c
@@ -4,6 +4,7 @@
  * Copyright (c) 2020-2021, Linaro Ltd.
  */
 
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -17,6 +18,12 @@ static const char * const sc8180x_tiles[] = {
 	"west"
 };
 
+static const u32 sc8180x_tile_offsets[] = {
+	0x00d00000,
+	0x00500000,
+	0x00100000
+};
+
 enum {
 	SOUTH,
 	EAST,
@@ -1557,6 +1564,13 @@ static const struct msm_pingroup sc8180x_groups[] = {
 	[193] = SDC_QDSD_PINGROUP(sdc2_data, 0x4b2000, 9, 0),
 };
 
+static const int sc8180x_acpi_reserved_gpios[] = {
+	0, 1, 2, 3,
+	47, 48, 49, 50,
+	126, 127, 128, 129,
+	-1
+};
+
 static const struct msm_gpio_wakeirq_map sc8180x_pdc_map[] = {
 	{ 3, 31 }, { 5, 32 }, { 8, 33 }, { 9, 34 }, { 10, 100 }, { 12, 104 },
 	{ 24, 37 }, { 26, 38 }, { 27, 41 }, { 28, 42 }, { 30, 39 }, { 36, 43 },
@@ -1588,11 +1602,42 @@ static struct msm_pinctrl_soc_data sc8180x_pinctrl = {
 	.nwakeirq_map = ARRAY_SIZE(sc8180x_pdc_map),
 };
 
+static const struct msm_pinctrl_soc_data sc8180x_acpi_pinctrl = {
+	.tiles = sc8180x_tiles,
+	.ntiles = ARRAY_SIZE(sc8180x_tiles),
+	.tile_offsets = sc8180x_tile_offsets,
+	.pins = sc8180x_pins,
+	.npins = ARRAY_SIZE(sc8180x_pins),
+	.groups = sc8180x_groups,
+	.ngroups = ARRAY_SIZE(sc8180x_groups),
+	.reserved_gpios = sc8180x_acpi_reserved_gpios,
+	.ngpios = 191,
+};
+
 static int sc8180x_pinctrl_probe(struct platform_device *pdev)
 {
-	return msm_pinctrl_probe(pdev, &sc8180x_pinctrl);
+	int ret;
+
+	if (pdev->dev.of_node) {
+		ret = msm_pinctrl_probe(pdev, &sc8180x_pinctrl);
+	} else if (has_acpi_companion(&pdev->dev)) {
+		ret = msm_pinctrl_probe(pdev, &sc8180x_acpi_pinctrl);
+	} else {
+		dev_err(&pdev->dev, "DT and ACPI disabled\n");
+		ret = -EINVAL;
+	}
+
+	return ret;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id sc8180x_pinctrl_acpi_match[] = {
+	{ "QCOM040D"},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, sc8180x_pinctrl_acpi_match);
+#endif
+
 static const struct of_device_id sc8180x_pinctrl_of_match[] = {
 	{ .compatible = "qcom,sc8180x-tlmm", },
 	{ },
@@ -1603,6 +1648,7 @@ static struct platform_driver sc8180x_pinctrl_driver = {
 	.driver = {
 		.name = "sc8180x-pinctrl",
 		.of_match_table = sc8180x_pinctrl_of_match,
+		.acpi_match_table = ACPI_PTR(sc8180x_pinctrl_acpi_match),
 	},
 	.probe = sc8180x_pinctrl_probe,
 	.remove = msm_pinctrl_remove,
-- 
2.17.1