[PATCH] pinctrl: add support for Qualcomm Technologies QDF2xxx ARM64 SoCs
Timur Tabi
timur at codeaurora.org
Tue Jul 14 16:29:04 PDT 2015
Add the pinctrl driver for the Qualcomm Technologies QDF2xxx ARM64 SoCs,
which uses the Qualcomm Technologies TLMM pinctrl/gpio device. This
driver is probed via ACPI and uses the pinctrl-msm.c backend driver.
This driver is intended to be used only an ACPI-enabled system. As such,
UEFI will handle all pin control configuration, so this driver does not
provide pin control functions. It is effectively a GPIO-only driver.
Signed-off-by: Timur Tabi <timur at codeaurora.org>
---
drivers/pinctrl/qcom/Kconfig | 8 +++
drivers/pinctrl/qcom/Makefile | 1 +
drivers/pinctrl/qcom/pinctrl-qdf2xxx.c | 124 +++++++++++++++++++++++++++++++++
3 files changed, 133 insertions(+)
create mode 100644 drivers/pinctrl/qcom/pinctrl-qdf2xxx.c
diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index 58f5632..8a38323 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -63,6 +63,14 @@ config PINCTRL_MSM8916
This is the pinctrl, pinmux, pinconf and gpiolib driver for the
Qualcomm TLMM block found on the Qualcomm 8916 platform.
+config PINCTRL_QDF2XXX
+ tristate "Qualcomm Technologies QDF2xxx pin controller driver"
+ depends on GPIOLIB && ACPI
+ select PINCTRL_MSM
+ help
+ This is the GPIO driver for the TLMM block found on the
+ Qualcomm Technologies QDF2xxx SOCs.
+
config PINCTRL_QCOM_SPMI_PMIC
tristate "Qualcomm SPMI PMIC pin controller driver"
depends on GPIOLIB && OF && SPMI
diff --git a/drivers/pinctrl/qcom/Makefile b/drivers/pinctrl/qcom/Makefile
index 3666c70..798d662 100644
--- a/drivers/pinctrl/qcom/Makefile
+++ b/drivers/pinctrl/qcom/Makefile
@@ -7,5 +7,6 @@ obj-$(CONFIG_PINCTRL_MSM8660) += pinctrl-msm8660.o
obj-$(CONFIG_PINCTRL_MSM8960) += pinctrl-msm8960.o
obj-$(CONFIG_PINCTRL_MSM8X74) += pinctrl-msm8x74.o
obj-$(CONFIG_PINCTRL_MSM8916) += pinctrl-msm8916.o
+obj-$(CONFIG_PINCTRL_QDF2XXX) += pinctrl-qdf2xxx.o
obj-$(CONFIG_PINCTRL_QCOM_SPMI_PMIC) += pinctrl-spmi-gpio.o
obj-$(CONFIG_PINCTRL_QCOM_SPMI_PMIC) += pinctrl-spmi-mpp.o
diff --git a/drivers/pinctrl/qcom/pinctrl-qdf2xxx.c b/drivers/pinctrl/qcom/pinctrl-qdf2xxx.c
new file mode 100644
index 0000000..e88943e
--- /dev/null
+++ b/drivers/pinctrl/qcom/pinctrl-qdf2xxx.c
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * GPIO and pin control functions on this SOC are handled by the "TLMM"
+ * device. The driver which controls this device is pinctrl-msm.c. Each
+ * SOC with a TLMM is expected to create a client driver that registers
+ * with pinctrl-msm.c. This means that all TLMM drivers are pin control
+ * drivers.
+ *
+ * This pin control driver is intended to be used only an ACPI-enabled
+ * system. As such, UEFI will handle all pin control configuration, so
+ * this driver does not provide pin control functions. It is effectively
+ * a GPIO-only driver. The alternative is to duplicate the GPIO code of
+ * pinctrl-msm.c into another driver.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+#include <linux/acpi.h>
+
+#include "pinctrl-msm.h"
+
+static struct msm_pinctrl_soc_data qdf2xxx_pinctrl;
+
+static int qdf2xxx_pinctrl_probe(struct platform_device *pdev)
+{
+ struct pinctrl_pin_desc *pins;
+ struct msm_pingroup *groups;
+ unsigned int i;
+ u32 num_gpios;
+ int ret;
+
+ /* Query the number of GPIOs from ACPI */
+ ret = device_property_read_u32(&pdev->dev, "num-gpios", &num_gpios);
+ if (ret < 0)
+ return ret;
+
+ if (!num_gpios) {
+ dev_warn(&pdev->dev, "missing num-gpios property\n");
+ return -ENODEV;
+ }
+
+ pins = devm_kcalloc(&pdev->dev, num_gpios,
+ sizeof(struct pinctrl_pin_desc), GFP_KERNEL);
+ groups = devm_kcalloc(&pdev->dev, num_gpios,
+ sizeof(struct msm_pingroup), GFP_KERNEL);
+
+ for (i = 0; i < num_gpios; i++) {
+ pins[i].number = i;
+
+ groups[i].npins = 1,
+ groups[i].pins = &pins[i].number;
+ groups[i].ctl_reg = 0x10000 * i;
+ groups[i].io_reg = 0x04 + 0x10000 * i;
+ groups[i].intr_cfg_reg = 0x08 + 0x10000 * i;
+ groups[i].intr_status_reg = 0x0c + 0x10000 * i;
+ groups[i].intr_target_reg = 0x08 + 0x10000 * i;
+
+ groups[i].mux_bit = 2;
+ groups[i].pull_bit = 0;
+ groups[i].drv_bit = 6;
+ groups[i].oe_bit = 9;
+ groups[i].in_bit = 0;
+ groups[i].out_bit = 1;
+ groups[i].intr_enable_bit = 0;
+ groups[i].intr_status_bit = 0;
+ groups[i].intr_target_bit = 5;
+ groups[i].intr_target_kpss_val = 1;
+ groups[i].intr_raw_status_bit = 4;
+ groups[i].intr_polarity_bit = 1;
+ groups[i].intr_detection_bit = 2;
+ groups[i].intr_detection_width = 2;
+ }
+
+ qdf2xxx_pinctrl.pins = pins;
+ qdf2xxx_pinctrl.groups = groups;
+ qdf2xxx_pinctrl.npins = num_gpios;
+ qdf2xxx_pinctrl.ngroups = num_gpios;
+ qdf2xxx_pinctrl.ngpios = num_gpios;
+
+ return msm_pinctrl_probe(pdev, &qdf2xxx_pinctrl);
+}
+
+static const struct acpi_device_id qdf2xxx_acpi_ids[] = {
+ {"QCOM8001"},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, qdf2xxx_acpi_ids);
+
+static struct platform_driver qdf2xxx_pinctrl_driver = {
+ .driver = {
+ .name = "qdf2xxx-pinctrl",
+ .owner = THIS_MODULE,
+ .acpi_match_table = ACPI_PTR(qdf2xxx_acpi_ids),
+ },
+ .probe = qdf2xxx_pinctrl_probe,
+ .remove = msm_pinctrl_remove,
+};
+
+static int __init qdf2xxx_pinctrl_init(void)
+{
+ return platform_driver_register(&qdf2xxx_pinctrl_driver);
+}
+arch_initcall(qdf2xxx_pinctrl_init);
+
+static void __exit qdf2xxx_pinctrl_exit(void)
+{
+ platform_driver_unregister(&qdf2xxx_pinctrl_driver);
+}
+module_exit(qdf2xxx_pinctrl_exit);
+
+MODULE_DESCRIPTION("Qualcomm Technologies QDF2xxx pin control driver");
+MODULE_LICENSE("GPL v2");
--
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
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