[PATCH 2/8] mfd: Hi655x: Add support for PMIC Hi655x MFD
From: Fei Wang
Date: Wed Sep 30 2015 - 07:09:21 EST
Add core files for Hi655x MFD driver.
Signed-off-by: Fei Wang <w.f@xxxxxxxxxx>
---
drivers/mfd/Kconfig | 9 +
drivers/mfd/Makefile | 1 +
drivers/mfd/hi655x-pmic.c | 358 +++++++++++++++++++++++++++++++++++++++
include/linux/mfd/hi655x-pmic.h | 56 ++++++
4 files changed, 424 insertions(+)
create mode 100644 drivers/mfd/hi655x-pmic.c
create mode 100644 include/linux/mfd/hi655x-pmic.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 99d6367..d320def 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -273,6 +273,15 @@ config MFD_HI6421_PMIC
menus in order to enable them.
We communicate with the Hi6421 via memory-mapped I/O.
+config MFD_HI655X_PMIC
+ tristate "HiSilicon Hi655X series PMU/Codec IC"
+ depends on ARCH_HISI
+ depends on OF
+ select MFD_CORE
+ select REGMAP_MMIO
+ help
+ Select this option to enable Hisilicon hi655x series pmic driver.
+
config HTC_EGPIO
bool "HTC EGPIO support"
depends on GPIOLIB && ARM
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index a59e3fc..11ec427 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -185,6 +185,7 @@ obj-$(CONFIG_MFD_STW481X) += stw481x.o
obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
obj-$(CONFIG_MFD_MENF21BMC) += menf21bmc.o
obj-$(CONFIG_MFD_HI6421_PMIC) += hi6421-pmic-core.o
+obj-$(CONFIG_MFD_HI655X_PMIC) += hi655x-pmic.o
obj-$(CONFIG_MFD_DLN2) += dln2.o
obj-$(CONFIG_MFD_RT5033) += rt5033.o
obj-$(CONFIG_MFD_SKY81452) += sky81452.o
diff --git a/drivers/mfd/hi655x-pmic.c b/drivers/mfd/hi655x-pmic.c
new file mode 100644
index 0000000..caeca4e
--- /dev/null
+++ b/drivers/mfd/hi655x-pmic.c
@@ -0,0 +1,358 @@
+/*
+ * Device driver for PMIC DRIVER in HI655X IC
+ *
+ * Copyright (c) 2015 Hisilicon Co. Ltd
+ *
+ * Fei Wang <w.f@xxxxxxxxxx>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/gpio.h>
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/hardirq.h>
+#include <linux/of_gpio.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/hi655x-pmic.h>
+#include <linux/regmap.h>
+
+
+static const struct of_device_id of_hi655x_pmic_child_match_tbl[] = {
+ { .compatible = "hisilicon,hi655x-regulator-pmic", },
+ { .compatible = "hisilicon,hi655x-powerkey", },
+ { .compatible = "hisilicon,hi655x-usbvbus", },
+ { .compatible = "hisilicon,hi655x-coul", },
+ { .compatible = "hisilicon,hi655x-pmu-rtc", },
+ {},
+};
+
+static const struct of_device_id of_hi655x_pmic_match_tbl[] = {
+ { .compatible = "hisilicon,hi655x-pmic-driver", },
+ {},
+};
+
+static unsigned int hi655x_pmic_get_version(struct hi655x_pmic *pmic)
+{
+ u32 val;
+
+ regmap_read(pmic->regmap,
+ HI655X_REG_TO_BUS_ADDR(HI655X_VER_REG), &val);
+
+ return val;
+}
+
+static irqreturn_t hi655x_pmic_irq_handler(int irq, void *data)
+{
+ struct hi655x_pmic *pmic = (struct hi655x_pmic *)data;
+ u32 pending;
+ u32 ret = IRQ_NONE;
+ unsigned long offset;
+ int i;
+
+ for (i = 0; i < HI655X_IRQ_ARRAY; i++) {
+ regmap_read(pmic->regmap,
+ HI655X_REG_TO_BUS_ADDR(i + HI655X_IRQ_STAT_BASE),
+ &pending);
+ if (pending != 0)
+ pr_debug("pending[%d]=0x%x\n\r", i, pending);
+
+ /* clear pmic-sub-interrupt */
+ regmap_write(pmic->regmap,
+ HI655X_REG_TO_BUS_ADDR(i + HI655X_IRQ_STAT_BASE),
+ pending);
+
+ if (pending) {
+ for_each_set_bit(offset, (unsigned long *)&pending,
+ HI655X_BITS)
+ generic_handle_irq(pmic->irqs[offset +
+ i * HI655X_BITS]);
+ ret = IRQ_HANDLED;
+ }
+ }
+ return ret;
+}
+
+
+static void hi655x_pmic_irq_mask(struct irq_data *d)
+{
+
+ u32 data, offset;
+ unsigned long pmic_spin_flag = 0;
+ struct hi655x_pmic *pmic = irq_data_get_irq_chip_data(d);
+
+ offset = ((irqd_to_hwirq(d) >> 3) + HI655X_IRQ_MASK_BASE);
+ spin_lock_irqsave(&pmic->ssi_hw_lock, pmic_spin_flag);
+ regmap_read(pmic->regmap, HI655X_REG_TO_BUS_ADDR(offset), &data);
+ data |= (1 << (irqd_to_hwirq(d) & 0x07));
+ regmap_write(pmic->regmap, HI655X_REG_TO_BUS_ADDR(offset), data);
+ spin_unlock_irqrestore(&pmic->ssi_hw_lock, pmic_spin_flag);
+}
+
+static void hi655x_pmic_irq_unmask(struct irq_data *d)
+{
+ u32 data, offset;
+ unsigned long pmic_spin_flag = 0;
+ struct hi655x_pmic *pmic = irq_data_get_irq_chip_data(d);
+
+ offset = ((irqd_to_hwirq(d) >> 3) + HI655X_IRQ_MASK_BASE);
+ spin_lock_irqsave(&pmic->ssi_hw_lock, pmic_spin_flag);
+ regmap_read(pmic->regmap, HI655X_REG_TO_BUS_ADDR(offset), &data);
+ data &= ~(1 << (irqd_to_hwirq(d) & 0x07));
+ regmap_write(pmic->regmap, HI655X_REG_TO_BUS_ADDR(offset), data);
+ spin_unlock_irqrestore(&pmic->ssi_hw_lock, pmic_spin_flag);
+}
+
+
+static struct irq_chip hi655x_pmic_irqchip = {
+ .name = "hisi-hi655x-pmic-irqchip",
+ .irq_mask = hi655x_pmic_irq_mask,
+ .irq_unmask = hi655x_pmic_irq_unmask,
+};
+
+static int hi655x_pmic_irq_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct hi655x_pmic *pmic = d->host_data;
+
+ irq_set_chip_and_handler_name(virq, &hi655x_pmic_irqchip,
+ handle_simple_irq, "hisi-hi655x-pmic-irqchip");
+ irq_set_chip_data(virq, pmic);
+ irq_set_irq_type(virq, IRQ_TYPE_NONE);
+
+ return 0;
+}
+
+static struct irq_domain_ops hi655x_domain_ops = {
+ .map = hi655x_pmic_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
+static inline void hi655x_pmic_clear_int(struct hi655x_pmic *pmic)
+{
+ int addr;
+
+ for (addr = HI655X_IRQ_STAT_BASE; addr < (HI655X_IRQ_STAT_BASE
+ + HI655X_IRQ_ARRAY); addr++) {
+ regmap_write(pmic->regmap,
+ HI655X_REG_TO_BUS_ADDR(addr), HI655X_IRQ_CLR);
+ }
+}
+
+static inline void hi655x_pmic_mask_int(struct hi655x_pmic *pmic)
+{
+ int addr;
+
+ for (addr = HI655X_IRQ_MASK_BASE; addr < (HI655X_IRQ_MASK_BASE
+ + HI655X_IRQ_ARRAY); addr++) {
+ regmap_write(pmic->regmap,
+ HI655X_REG_TO_BUS_ADDR(addr), HI655X_IRQ_MASK);
+ }
+}
+
+
+
+static struct regmap_config hi655x_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 8,
+ .max_register = HI655X_REG_TO_BUS_ADDR(0xFF),
+};
+
+
+static int hi655x_pmic_probe(struct platform_device *pdev)
+{
+ int i = 0;
+ int ret = 0;
+ u32 virq = 0;
+ int pmu_on = 1;
+ enum of_gpio_flags gpio_flags;
+
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct hi655x_pmic *pmic = NULL;
+ struct device_node *gpio_np = NULL;
+ void __iomem *base;
+
+ pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
+
+ /*
+ * init spin lock
+ */
+ spin_lock_init(&pmic->ssi_hw_lock);
+
+ /*
+ * get resources
+ */
+ pmic->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!pmic->res) {
+ dev_err(dev, "platform_get_resource err\n");
+ return -ENOENT;
+ }
+ if (!devm_request_mem_region(dev, pmic->res->start,
+ resource_size(pmic->res), pdev->name)) {
+ dev_err(dev, "cannot claim register memory\n");
+ return -ENOMEM;
+ }
+ base = ioremap(pmic->res->start, resource_size(pmic->res));
+ if (!base) {
+ dev_err(dev, "cannot map register memory\n");
+ return -ENOMEM;
+ }
+ pmic->regmap = devm_regmap_init_mmio_clk(dev, NULL, base,
+ &hi655x_regmap_config);
+
+ /*
+ * confirm pmu is exist&effective
+ */
+
+ pmic->ver = hi655x_pmic_get_version(pmic);
+ if ((pmic->ver < PMU_VER_START) || (pmic->ver > PMU_VER_END)) {
+ dev_warn(dev, "it is wrong pmu version\n");
+ pmu_on = 0;
+ }
+
+ regmap_write(pmic->regmap, HI655X_REG_TO_BUS_ADDR(0x1b5), 0xff);
+
+ gpio_np = of_parse_phandle(np, "pmu_irq_gpio", 0);
+ if (!gpio_np) {
+ dev_err(dev, "can't parse property\n");
+ return -ENOENT;
+ }
+ pmic->gpio = of_get_gpio_flags(gpio_np, 0, &gpio_flags);
+ if (pmic->gpio < 0) {
+ dev_err(dev, "failed to of_get_gpio_flags %d\n", pmic->gpio);
+ return pmic->gpio;
+ }
+ if (!gpio_is_valid(pmic->gpio)) {
+ dev_err(dev, "it is invalid gpio %d\n", pmic->gpio);
+ return -EINVAL;
+ }
+ ret = gpio_request_one(pmic->gpio, GPIOF_IN, "hi655x_pmic_irq");
+ if (ret < 0) {
+ dev_err(dev, "failed to request gpio %d ret = %d\n",
+ pmic->gpio, ret);
+ return ret;
+ }
+ pmic->irq = gpio_to_irq(pmic->gpio);
+
+ /*
+ * clear PMIC sub-interrupt
+ */
+ hi655x_pmic_clear_int(pmic);
+
+ /*
+ * mask PMIC sub-interrupt
+ */
+ hi655x_pmic_mask_int(pmic);
+
+ /*
+ * register irq domain
+ */
+ pmic->domain = irq_domain_add_simple(np,
+ HI655X_NR_IRQ, 0, &hi655x_domain_ops, pmic);
+ if (!pmic->domain) {
+ dev_err(dev, "failed irq domain add simple!\n");
+ ret = -ENODEV;
+ goto irq_domain_add_simple;
+ }
+
+ /*
+ * here call map function
+ */
+ for (i = 0; i < HI655X_NR_IRQ; i++) {
+ virq = irq_create_mapping(pmic->domain, i);
+ if (0 == virq) {
+ dev_err(dev, "Failed mapping hwirq\n");
+ ret = -ENOSPC;
+ goto irq_create_mapping;
+ }
+ pmic->irqs[i] = virq;
+ }
+
+ /*
+ * We must make sure the GPIO status which is high.
+ */
+ if (pmu_on) {
+ ret = request_threaded_irq(pmic->irq, hi655x_pmic_irq_handler,
+ NULL, IRQF_TRIGGER_LOW | IRQF_SHARED | IRQF_NO_SUSPEND,
+ "hi655x-pmic-irq", pmic);
+ if (ret < 0) {
+ dev_err(dev, "could not claim pmic %d\n", ret);
+ ret = -ENODEV;
+ goto request_threaded_irq;
+ }
+ }
+
+ pmic->dev = dev;
+
+ /*
+ * bind pmic to device
+ */
+ platform_set_drvdata(pdev, pmic);
+
+ /*
+ * populate sub nodes
+ */
+ of_platform_populate(np, of_hi655x_pmic_child_match_tbl, NULL, dev);
+ return 0;
+irq_domain_add_simple:
+irq_create_mapping:
+request_threaded_irq:
+ free_irq(pmic->irq, pmic);
+ gpio_free(pmic->gpio);
+ return ret;
+}
+
+static int hi655x_pmic_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct hi655x_pmic *pmic = platform_get_drvdata(pdev);
+
+ free_irq(pmic->irq, pmic);
+ gpio_free(pmic->gpio);
+ devm_release_mem_region(dev, pmic->res->start,
+ resource_size(pmic->res));
+ devm_kfree(dev, pmic);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+static struct platform_driver hi655x_pmic_driver = {
+ .driver = {
+ .name = "hisi,hi655x-pmic",
+ .owner = THIS_MODULE,
+ .of_match_table = of_hi655x_pmic_match_tbl,
+ },
+ .probe = hi655x_pmic_probe,
+ .remove = hi655x_pmic_remove,
+};
+module_platform_driver(hi655x_pmic_driver);
+
+MODULE_AUTHOR("Fei Wang <w.f@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Hisi hi655x pmic driver");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/hi655x-pmic.h b/include/linux/mfd/hi655x-pmic.h
new file mode 100644
index 0000000..e66246c
--- /dev/null
+++ b/include/linux/mfd/hi655x-pmic.h
@@ -0,0 +1,56 @@
+/*
+ * Header file for device driver Hi655X PMIC
+ *
+ * Copyright (C) 2015 Hisilicon Co. Ltd.
+ *
+ * Fei Wang <w.f@xxxxxxxxxx>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
+#ifndef __HI655X_PMIC_H
+#define __HI655X_PMIC_H
+
+/* Hi655x registers are mapped to memory bus in 4 bytes stride */
+#define HI655X_REG_TO_BUS_ADDR(x) ((x) << 2)
+
+#define HI655X_BITS (8)
+
+/*numb of sub-interrupt*/
+#define HI655X_NR_IRQ (32)
+
+#define HI655X_IRQ_STAT_BASE (0x003)
+#define HI655X_IRQ_MASK_BASE (0x007)
+#define HI655X_IRQ_ARRAY (4)
+#define HI655X_IRQ_MASK (0xFF)
+#define HI655X_IRQ_CLR (0xFF)
+#define HI655X_VER_REG (0x000)
+
+#define PMU_VER_START 0x10
+#define PMU_VER_END 0x38
+
+struct hi655x_pmic {
+ struct resource *res;
+ struct device *dev;
+ struct regmap *regmap;
+ spinlock_t ssi_hw_lock;
+ struct clk *clk;
+ struct irq_domain *domain;
+ int irq;
+ int gpio;
+ unsigned int irqs[HI655X_NR_IRQ];
+ unsigned int ver;
+};
+#endif
--
1.7.9.5
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