This adds TMU (Time Management Unit) support for Intel BXT platform.
It enables the alarm wake-up functionality in the TMU unit of Whiskey Cove
PMIC.
Signed-off-by: Nilesh Bacchewar <nilesh.bacchewar@xxxxxxxxx>
Reviewed-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/mfd/intel_soc_pmic_bxtwc.c | 38 ++++++++
drivers/platform/x86/Kconfig | 8 ++
drivers/platform/x86/Makefile | 1 +
drivers/platform/x86/intel_bxtwc_tmu.c | 162 +++++++++++++++++++++++++++++++++
include/linux/mfd/intel_soc_pmic.h | 1 +
5 files changed, 210 insertions(+)
create mode 100644 drivers/platform/x86/intel_bxtwc_tmu.c
diff --git a/drivers/mfd/intel_soc_pmic_bxtwc.c b/drivers/mfd/intel_soc_pmic_bxtwc.c
index 43e54b7..92aba02 100644
--- a/drivers/mfd/intel_soc_pmic_bxtwc.c
+++ b/drivers/mfd/intel_soc_pmic_bxtwc.c
@@ -42,6 +42,7 @@
#define BXTWC_GPIOIRQ0 0x4E0B
#define BXTWC_GPIOIRQ1 0x4E0C
#define BXTWC_CRITIRQ 0x4E0D
+#define BXTWC_TMUIRQ 0x4FB6
/* Interrupt MASK Registers */
#define BXTWC_MIRQLVL1 0x4E0E
@@ -59,6 +60,7 @@
#define BXTWC_MGPIO0IRQ 0x4E19
#define BXTWC_MGPIO1IRQ 0x4E1A
#define BXTWC_MCRITIRQ 0x4E1B
+#define BXTWC_MTMUIRQ 0x4FB7
/* Whiskey Cove PMIC share same ACPI ID between different platforms */
#define BROXTON_PMIC_WC_HRV 4
@@ -91,6 +93,7 @@ enum bxtwc_irqs_level2 {
BXTWC_GPIO0_IRQ,
BXTWC_GPIO1_IRQ,
BXTWC_CRIT_IRQ,
+ BXTWC_TMU_IRQ,
};
static const struct regmap_irq bxtwc_regmap_irqs[] = {
@@ -118,6 +121,10 @@ enum bxtwc_irqs_level2 {
REGMAP_IRQ_REG(BXTWC_CRIT_IRQ, 9, 0x03),
};
+static const struct regmap_irq bxtwc_regmap_irqs_tmu[] = {
+ REGMAP_IRQ_REG(BXTWC_TMU_IRQ, 0, 0x06),
+};
+
static struct regmap_irq_chip bxtwc_regmap_irq_chip = {
.name = "bxtwc_irq_chip",
.status_base = BXTWC_IRQLVL1,
@@ -136,6 +143,15 @@ enum bxtwc_irqs_level2 {
.num_regs = 10,
};
+static struct regmap_irq_chip bxtwc_regmap_irq_chip_tmu = {
+ .name = "bxtwc_irq_chip_tmu",
+ .status_base = BXTWC_TMUIRQ,
+ .mask_base = BXTWC_MTMUIRQ,
+ .irqs = bxtwc_regmap_irqs_tmu,
+ .num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_tmu),
+ .num_regs = 1,
+};
+
static struct resource gpio_resources[] = {
DEFINE_RES_IRQ_NAMED(BXTWC_GPIO0_IRQ, "GPIO0"),
DEFINE_RES_IRQ_NAMED(BXTWC_GPIO1_IRQ, "GPIO1"),
@@ -164,6 +180,10 @@ enum bxtwc_irqs_level2 {
DEFINE_RES_IRQ_NAMED(BXTWC_BCU_IRQ, "BCU"),
};
+static struct resource tmu_resources[] = {
+ DEFINE_RES_IRQ_NAMED(BXTWC_TMU_IRQ, "TMU"),
+};
+
static struct mfd_cell bxt_wc_dev[] = {
{
.name = "bxt_wcove_gpadc",
@@ -191,6 +211,12 @@ enum bxtwc_irqs_level2 {
.resources = bcu_resources,
},
{
+ .name = "bxt_wcove_tmu",
+ .num_resources = ARRAY_SIZE(tmu_resources),
+ .resources = tmu_resources,
+ },
+
+ {
.name = "bxt_wcove_gpio",
.num_resources = ARRAY_SIZE(gpio_resources),
.resources = gpio_resources,
@@ -400,6 +426,15 @@ static int bxtwc_probe(struct platform_device *pdev)
goto err_irq_chip_level2;
}
+ ret = regmap_add_irq_chip(pmic->regmap, pmic->irq,
+ IRQF_ONESHOT | IRQF_SHARED,
+ 0, &bxtwc_regmap_irq_chip_tmu,
+ &pmic->irq_chip_data_tmu);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to add TMU IRQ chip\n");
+ goto err_irq_chip_tmu;
+ }
+
ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, bxt_wc_dev,
ARRAY_SIZE(bxt_wc_dev), NULL, 0,
NULL);
@@ -429,6 +464,8 @@ static int bxtwc_probe(struct platform_device *pdev)
err_sysfs:
mfd_remove_devices(&pdev->dev);
err_mfd:
+ regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data_tmu);
+err_irq_chip_tmu:
regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data_level2);
err_irq_chip_level2:
regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
@@ -444,6 +481,7 @@ static int bxtwc_remove(struct platform_device *pdev)
mfd_remove_devices(&pdev->dev);
regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data);
regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data_level2);
+ regmap_del_irq_chip(pmic->irq, pmic->irq_chip_data_tmu);
return 0;
}
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index b8a21d7..2dbe464 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -1027,4 +1027,12 @@ config INTEL_TELEMETRY
used to get various SoC events and parameters
directly via debugfs files. Various tools may use
this interface for SoC state monitoring.
+
+config INTEL_BXTWC_PMIC_TMU
+ tristate "Intel BXT Whiskey Cove TMU Driver"
+ depends on INTEL_SOC_PMIC && INTEL_PMC_IPC && REGMAP
+ ---help---
+ Select this driver to use Intel BXT Whiskey Cove PMIC TMU feature.
+ This driver enables the alarm wakeup functionality in the TMU unit
+ of Whiskey Cove PMIC.
endif # X86_PLATFORM_DEVICES
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 2efa86d..0bd6609 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_ALIENWARE_WMI) += alienware-wmi.o
obj-$(CONFIG_INTEL_PMC_IPC) += intel_pmc_ipc.o
obj-$(CONFIG_SURFACE_PRO3_BUTTON) += surfacepro3_button.o
obj-$(CONFIG_INTEL_PUNIT_IPC) += intel_punit_ipc.o
+obj-$(CONFIG_INTEL_BXTWC_PMIC_TMU) += intel_bxtwc_tmu.o
obj-$(CONFIG_INTEL_TELEMETRY) += intel_telemetry_core.o \
intel_telemetry_pltdrv.o \
intel_telemetry_debugfs.o
diff --git a/drivers/platform/x86/intel_bxtwc_tmu.c b/drivers/platform/x86/intel_bxtwc_tmu.c
new file mode 100644
index 0000000..e202abd
--- /dev/null
+++ b/drivers/platform/x86/intel_bxtwc_tmu.c
@@ -0,0 +1,162 @@
+/*
+ * intel_bxtwc_tmu.c - Intel BXT Whiskey Cove PMIC TMU driver
+ *
+ * Copyright (C) 2016 Intel Corporation. All rights reserved.
+ *
+ * This driver adds TMU (Time Management Unit) support for Intel BXT platform.
+ * It enables the alarm wake-up functionality in the TMU unit of Whiskey Cove
+ * PMIC.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/intel_soc_pmic.h>
+
+#define BXTWC_TMUIRQ 0x4fb6
+#define BXTWC_MIRQLVL1 0x4e0e
+#define BXTWC_MTMUIRQ_REG 0x4fb7
+#define BXTWC_MIRQLVL1_MTMU BIT(1)
+#define BXTWC_TMU_WK_ALRM BIT(1)
+#define BXTWC_TMU_SYS_ALRM BIT(2)
+#define BXTWC_TMU_ALRM_MASK (BXTWC_TMU_WK_ALRM | BXTWC_TMU_SYS_ALRM)
+#define BXTWC_TMU_ALRM_IRQ (BXTWC_TMU_WK_ALRM | BXTWC_TMU_SYS_ALRM)
+
+struct wcove_tmu {
+ int irq;
+ struct device *dev;
+ struct regmap *regmap;
+};
+
+static irqreturn_t bxt_wcove_tmu_irq_handler(int irq, void *data)
+{
+ struct wcove_tmu *wctmu = data;
+ unsigned int tmu_irq;
+
+ /* Read TMU interrupt reg */
+ regmap_read(wctmu->regmap, BXTWC_TMUIRQ, &tmu_irq);
+ if (tmu_irq & BXTWC_TMU_ALRM_IRQ) {
+ /* clear TMU irq */
+ regmap_write(wctmu->regmap, BXTWC_TMUIRQ, tmu_irq);
+ return IRQ_HANDLED;
+ }
+ return IRQ_NONE;
+}
+
+static int bxt_wcove_tmu_probe(struct platform_device *pdev)
+{
+ struct intel_soc_pmic *pmic = dev_get_drvdata(pdev->dev.parent);
+ struct regmap_irq_chip_data *regmap_irq_chip;
+ struct wcove_tmu *wctmu;
+ int ret, virq, irq;
+
+ wctmu = devm_kzalloc(&pdev->dev, sizeof(*wctmu), GFP_KERNEL);
+ if (!wctmu)
+ return -ENOMEM;
+
+ wctmu->dev = &pdev->dev;
+ wctmu->regmap = pmic->regmap;
+
+ irq = platform_get_irq(pdev, 0);
+
+ if (irq < 0) {
+ dev_err(&pdev->dev, "invalid irq %d\n", irq);
+ return irq;
+ }
+
+ regmap_irq_chip = pmic->irq_chip_data_tmu;
+ virq = regmap_irq_get_virq(regmap_irq_chip, irq);
+ if (virq < 0) {
+ dev_err(&pdev->dev,
+ "failed to get virtual interrupt=%d\n", irq);
+ return virq;
+ }
+
+ ret = devm_request_threaded_irq(&pdev->dev, virq,
+ NULL, bxt_wcove_tmu_irq_handler,
+ IRQF_ONESHOT, "bxt_wcove_tmu", wctmu);
+ if (ret) {
+ dev_err(&pdev->dev, "request irq failed: %d,virq: %d\n",
+ ret, virq);
+ return ret;
+ }
+ wctmu->irq = virq;
+
+ /* Enable TMU interrupts */
+ regmap_update_bits(wctmu->regmap, BXTWC_MIRQLVL1,
+ BXTWC_MIRQLVL1_MTMU, 0);
+
+ /* Unmask TMU second level Wake & System alarm */
+ regmap_update_bits(wctmu->regmap, BXTWC_MTMUIRQ_REG,
+ BXTWC_TMU_ALRM_MASK, 0);
+
+ platform_set_drvdata(pdev, wctmu);
+ return 0;
+}
+
+static int bxt_wcove_tmu_remove(struct platform_device *pdev)
+{
+ struct wcove_tmu *wctmu = platform_get_drvdata(pdev);
+ unsigned int val;
+
+ /* Mask TMU interrupts */
+ regmap_read(wctmu->regmap, BXTWC_MIRQLVL1, &val);
+ regmap_write(wctmu->regmap, BXTWC_MIRQLVL1,
+ val | BXTWC_MIRQLVL1_MTMU);
+ regmap_read(wctmu->regmap, BXTWC_MTMUIRQ_REG, &val);
+ regmap_write(wctmu->regmap, BXTWC_MTMUIRQ_REG,
+ val | BXTWC_TMU_ALRM_MASK);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bxtwc_tmu_suspend(struct device *dev)
+{
+ struct wcove_tmu *wctmu = dev_get_drvdata(dev);
+
+ enable_irq_wake(wctmu->irq);
+ return 0;
+}
+
+static int bxtwc_tmu_resume(struct device *dev)
+{
+ struct wcove_tmu *wctmu = dev_get_drvdata(dev);
+
+ disable_irq_wake(wctmu->irq);
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(bxtwc_tmu_pm_ops, bxtwc_tmu_suspend, bxtwc_tmu_resume);
+
+static const struct platform_device_id bxt_wcove_tmu_id_table[] = {
+ { .name = "bxt_wcove_tmu" },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, bxt_wcove_tmu_id_table);
+
+static struct platform_driver bxt_wcove_tmu_driver = {
+ .probe = bxt_wcove_tmu_probe,
+ .remove = bxt_wcove_tmu_remove,
+ .driver = {
+ .name = "bxt_wcove_tmu",
+ .pm = &bxtwc_tmu_pm_ops,
+ },
+ .id_table = bxt_wcove_tmu_id_table,
+};
+
+module_platform_driver(bxt_wcove_tmu_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Nilesh Bacchewar <nilesh.bacchewar@xxxxxxxxx>");
+MODULE_DESCRIPTION("BXT Whiskey Cove TMU Driver");
diff --git a/include/linux/mfd/intel_soc_pmic.h b/include/linux/mfd/intel_soc_pmic.h
index cf619db..956caa0 100644
--- a/include/linux/mfd/intel_soc_pmic.h
+++ b/include/linux/mfd/intel_soc_pmic.h
@@ -26,6 +26,7 @@ struct intel_soc_pmic {
struct regmap *regmap;
struct regmap_irq_chip_data *irq_chip_data;
struct regmap_irq_chip_data *irq_chip_data_level2;
+ struct regmap_irq_chip_data *irq_chip_data_tmu;
struct device *dev;
};
--
1.9.1
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