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authorLee Jones <lee.jones@linaro.org>2019-06-10 09:42:09 +0100
committerLinus Walleij <linus.walleij@linaro.org>2019-06-12 09:14:00 +0200
commita229105d7a1ee1f9e078afe44497cab482a8aba8 (patch)
tree712c97f0757b0f4f9d118b32ce63c154de4cd649 /drivers/pinctrl
parent4c0efbfb2669aa99e43e5deee30f39afd69cad65 (diff)
downloadlinux-a229105d7a1ee1f9e078afe44497cab482a8aba8.tar.bz2
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> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
-rw-r--r--drivers/pinctrl/qcom/Kconfig2
-rw-r--r--drivers/pinctrl/qcom/pinctrl-sdm845.c36
2 files changed, 36 insertions, 2 deletions
diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index 2e66ab72c10b..aafbe932424f 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -168,7 +168,7 @@ 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;
}
+#if 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,