path: root/arm64-qcom-pinctrl-support-for-ACPI.patch

From 0ab5b9df0c9f07ae747ddc678d4e423c42f69624 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Mon, 10 Jun 2019 09:42:06 +0100
Subject: [PATCH 1/8] i2c: i2c-qcom-geni: Provide support for ACPI

Add a match table to allow automatic probing of ACPI device
QCOM0220.  Ignore clock attainment errors.  Set default clock
frequency value.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 drivers/i2c/busses/i2c-qcom-geni.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index db075bc0d952..9e3b8a98688d 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 // Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
 
+#include <linux/acpi.h>
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
 #include <linux/err.h>
@@ -483,6 +484,14 @@ static const struct i2c_algorithm geni_i2c_algo = {
 	.functionality	= geni_i2c_func,
 };
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id geni_i2c_acpi_match[] = {
+	{ "QCOM0220"},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, geni_i2c_acpi_match);
+#endif
+
 static int geni_i2c_probe(struct platform_device *pdev)
 {
 	struct geni_i2c_dev *gi2c;
@@ -502,7 +511,7 @@ static int geni_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(gi2c->se.base);
 
 	gi2c->se.clk = devm_clk_get(&pdev->dev, "se");
-	if (IS_ERR(gi2c->se.clk)) {
+	if (IS_ERR(gi2c->se.clk) && !has_acpi_companion(&pdev->dev)) {
 		ret = PTR_ERR(gi2c->se.clk);
 		dev_err(&pdev->dev, "Err getting SE Core clk %d\n", ret);
 		return ret;
@@ -516,6 +525,9 @@ static int geni_i2c_probe(struct platform_device *pdev)
 		gi2c->clk_freq_out = KHZ(100);
 	}
 
+	if (has_acpi_companion(&pdev->dev))
+		ACPI_COMPANION_SET(&gi2c->adap.dev, ACPI_COMPANION(&pdev->dev));
+
 	gi2c->irq = platform_get_irq(pdev, 0);
 	if (gi2c->irq < 0) {
 		dev_err(&pdev->dev, "IRQ error for i2c-geni\n");
@@ -660,6 +672,7 @@ static struct platform_driver geni_i2c_driver = {
 		.name = "geni_i2c",
 		.pm = &geni_i2c_pm_ops,
 		.of_match_table = geni_i2c_dt_match,
+		.acpi_match_table = ACPI_PTR(geni_i2c_acpi_match),
 	},
 };
 
-- 
2.21.0

From 5a0639fed6e05977d85c4824354e73d0a2fa92ef Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Mon, 10 Jun 2019 09:42:07 +0100
Subject: [PATCH 2/8] i2c: i2c-qcom-geni: Signify successful driver probe

The Qualcomm Geni I2C driver currently probes silently which can be
confusing when debugging potential issues.  Add a low level (INFO)
print when each I2C controller is successfully initially set-up.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 drivers/i2c/busses/i2c-qcom-geni.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index 9e3b8a98688d..a89bfce5388e 100644
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -596,6 +596,8 @@ static int geni_i2c_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	dev_dbg(&pdev->dev, "Geni-I2C adaptor successfully added\n");
+
 	return 0;
 }
 
-- 
2.21.0

From 6f202eb6dbccf3172616a620faf934bf6195a0f9 Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Mon, 10 Jun 2019 09:42:08 +0100
Subject: [PATCH 3/8] pinctrl: msm: Add ability for drivers to supply a
 reserved GPIO list

When booting MSM based platforms with Device Tree or some ACPI
implementations, it is possible to provide a list of reserved pins
via the 'gpio-reserved-ranges' and 'gpios' properties respectively.
However some ACPI tables are not populated with this information,
thus it has to come from a knowledgable device driver instead.

Here we provide the MSM common driver with additional support to
parse this informtion and correctly populate the widely used
'valid_mask'.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
 drivers/pinctrl/qcom/pinctrl-msm.c | 18 ++++++++++++++++++
 drivers/pinctrl/qcom/pinctrl-msm.h |  1 +
 2 files changed, 19 insertions(+)

diff --git a/drivers/pinctrl/qcom/pinctrl-msm.c b/drivers/pinctrl/qcom/pinctrl-msm.c
index 6e319bcc2326..80682b017a47 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.c
+++ b/drivers/pinctrl/qcom/pinctrl-msm.c
@@ -599,8 +599,23 @@ static int msm_gpio_init_valid_mask(struct gpio_chip *chip)
 	int ret;
 	unsigned int len, i;
 	unsigned int max_gpios = pctrl->soc->ngpios;
+	const int *reserved = pctrl->soc->reserved_gpios;
 	u16 *tmp;
 
+	/* Driver provided reserved list overrides DT and ACPI */
+	if (reserved) {
+		bitmap_fill(chip->valid_mask, max_gpios);
+		for (i = 0; reserved[i] >= 0; i++) {
+			if (i >= max_gpios || reserved[i] >= max_gpios) {
+				dev_err(pctrl->dev, "invalid list of reserved GPIOs\n");
+				return -EINVAL;
+			}
+			clear_bit(reserved[i], chip->valid_mask);
+		}
+
+		return 0;
+	}
+
 	/* The number of GPIOs in the ACPI tables */
 	len = ret = device_property_read_u16_array(pctrl->dev, "gpios", NULL,
 						   0);
@@ -956,6 +971,9 @@ static void msm_gpio_irq_handler(struct irq_desc *desc)
 
 static bool msm_gpio_needs_valid_mask(struct msm_pinctrl *pctrl)
 {
+	if (pctrl->soc->reserved_gpios)
+		return true;
+
 	return device_property_read_u16_array(pctrl->dev, "gpios", NULL, 0) > 0;
 }
 
diff --git a/drivers/pinctrl/qcom/pinctrl-msm.h b/drivers/pinctrl/qcom/pinctrl-msm.h
index b724581c605c..48569cda8471 100644
--- a/drivers/pinctrl/qcom/pinctrl-msm.h
+++ b/drivers/pinctrl/qcom/pinctrl-msm.h
@@ -113,6 +113,7 @@ struct msm_pinctrl_soc_data {
 	bool pull_no_keeper;
 	const char *const *tiles;
 	unsigned int ntiles;
+	const int *reserved_gpios;
 };
 
 extern const struct dev_pm_ops msm_pinctrl_dev_pm_ops;
-- 
2.21.0

From 568ff4c9723d761164416fdf876232f5b14cf3ad Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Mon, 10 Jun 2019 09:42:09 +0100
Subject: [PATCH 4/8] pinctrl: qcom: sdm845: Provide ACPI support

This patch provides basic support for booting with ACPI instead
of the currently supported Device Tree.  When doing so there are a
couple of differences which we need to taken into consideration.

Firstly, the SDM850 ACPI tables omit information pertaining to the
4 reserved GPIOs on the platform.  If Linux attempts to touch/
initialise any of these lines, the firmware will restart the
platform.

Secondly, when booting with ACPI, it is expected that the firmware
will set-up things like; Regulators, Clocks, Pin Functions, etc in
their ideal configuration.  Thus, the possible Pin Functions
available to this platform are not advertised when providing the
higher GPIOD/Pinctrl APIs with pin information.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
 drivers/pinctrl/qcom/Kconfig          |  2 +-
 drivers/pinctrl/qcom/pinctrl-sdm845.c | 36 ++++++++++++++++++++++++++-
 2 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index 890d0a3a790b..27ab585a639c 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -169,7 +169,7 @@ config PINCTRL_SDM660
 
 config PINCTRL_SDM845
        tristate "Qualcomm Technologies Inc SDM845 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-sdm845.c b/drivers/pinctrl/qcom/pinctrl-sdm845.c
index c97f20fca5fd..98a438dba711 100644
--- a/drivers/pinctrl/qcom/pinctrl-sdm845.c
+++ b/drivers/pinctrl/qcom/pinctrl-sdm845.c
@@ -3,6 +3,7 @@
  * Copyright (c) 2016-2018, The Linux Foundation. All rights reserved.
  */
 
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
@@ -1277,6 +1278,10 @@ static const struct msm_pingroup sdm845_groups[] = {
 	UFS_RESET(ufs_reset, 0x99f000),
 };
 
+static const int sdm845_acpi_reserved_gpios[] = {
+	0, 1, 2, 3, 81, 82, 83, 84, -1
+};
+
 static const struct msm_pinctrl_soc_data sdm845_pinctrl = {
 	.pins = sdm845_pins,
 	.npins = ARRAY_SIZE(sdm845_pins),
@@ -1287,11 +1292,39 @@ static const struct msm_pinctrl_soc_data sdm845_pinctrl = {
 	.ngpios = 150,
 };
 
+static const struct msm_pinctrl_soc_data sdm845_acpi_pinctrl = {
+	.pins = sdm845_pins,
+	.npins = ARRAY_SIZE(sdm845_pins),
+	.groups = sdm845_groups,
+	.ngroups = ARRAY_SIZE(sdm845_groups),
+	.reserved_gpios = sdm845_acpi_reserved_gpios,
+	.ngpios = 150,
+};
+
 static int sdm845_pinctrl_probe(struct platform_device *pdev)
 {
-	return msm_pinctrl_probe(pdev, &sdm845_pinctrl);
+	int ret;
+
+	if (pdev->dev.of_node) {
+		ret = msm_pinctrl_probe(pdev, &sdm845_pinctrl);
+	} else if (has_acpi_companion(&pdev->dev)) {
+		ret = msm_pinctrl_probe(pdev, &sdm845_acpi_pinctrl);
+	} else {
+		dev_err(&pdev->dev, "DT and ACPI disabled\n");
+		return -EINVAL;
+	}
+
+	return ret;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id sdm845_pinctrl_acpi_match[] = {
+	{ "QCOM0217"},
+	{ },
+};
+MODULE_DEVICE_TABLE(acpi, sdm845_pinctrl_acpi_match);
+#endif
+
 static const struct of_device_id sdm845_pinctrl_of_match[] = {
 	{ .compatible = "qcom,sdm845-pinctrl", },
 	{ },
@@ -1302,6 +1335,7 @@ static struct platform_driver sdm845_pinctrl_driver = {
 		.name = "sdm845-pinctrl",
 		.pm = &msm_pinctrl_dev_pm_ops,
 		.of_match_table = sdm845_pinctrl_of_match,
+		.acpi_match_table = ACPI_PTR(sdm845_pinctrl_acpi_match),
 	},
 	.probe = sdm845_pinctrl_probe,
 	.remove = msm_pinctrl_remove,
-- 
2.21.0