[PATCH 2/7] mfd: add mc34708 driver
Eric Bénard
eric at eukrea.com
Mon Feb 20 19:27:34 EST 2012
this driver is a copie of the mc13892 one
Signed-off-by: Eric Bénard <eric at eukrea.com>
---
drivers/mfd/Kconfig | 4 +
drivers/mfd/Makefile | 1 +
drivers/mfd/mc34708.c | 294 +++++++++++++++++++++++++++++++++++++++++++++++++
include/mfd/mc34708.h | 102 +++++++++++++++++
4 files changed, 401 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/mc34708.c
create mode 100644 include/mfd/mc34708.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 87797de..b080c1c 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -8,6 +8,10 @@ config I2C_MC34704
depends on I2C
bool "MC34704 PMIC driver"
+config I2C_MC34708
+ depends on I2C
+ bool "MC34708 PMIC driver"
+
config I2C_MC9SDZ60
depends on I2C
bool "MC9SDZ60 driver"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 1171335..bc9e0e8 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -1,5 +1,6 @@
obj-$(CONFIG_I2C_MC13892) += mc13892.o
obj-$(CONFIG_I2C_MC34704) += mc34704.o
+obj-$(CONFIG_I2C_MC34708) += mc34708.o
obj-$(CONFIG_I2C_MC9SDZ60) += mc9sdz60.o
obj-$(CONFIG_I2C_LP3972) += lp3972.o
obj-$(CONFIG_I2C_TWLCORE) += twl-core.o
diff --git a/drivers/mfd/mc34708.c b/drivers/mfd/mc34708.c
new file mode 100644
index 0000000..e7f40c0
--- /dev/null
+++ b/drivers/mfd/mc34708.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2007 Sascha Hauer, Pengutronix
+ * 2009 Marc Kleine-Budde <mkl at pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <xfuncs.h>
+#include <errno.h>
+#include <spi/spi.h>
+#include <malloc.h>
+
+#include <i2c/i2c.h>
+#include <mfd/mc34708.h>
+
+#define DRIVERNAME "mc34708"
+
+#define to_mc34708(a) container_of(a, struct mc34708, cdev)
+
+static struct mc34708 *mc_dev;
+
+struct mc34708 *mc34708_get(void)
+{
+ if (!mc_dev)
+ return NULL;
+
+ return mc_dev;
+}
+EXPORT_SYMBOL(mc34708_get);
+
+#ifdef CONFIG_SPI
+static int spi_rw(struct spi_device *spi, void * buf, size_t len)
+{
+ int ret;
+
+ struct spi_transfer t = {
+ .tx_buf = (const void *)buf,
+ .rx_buf = buf,
+ .len = len,
+ .cs_change = 0,
+ .delay_usecs = 0,
+ };
+ struct spi_message m;
+
+ spi_message_init(&m);
+ spi_message_add_tail(&t, &m);
+
+ if ((ret = spi_sync(spi, &m)))
+ return ret;
+ return 0;
+}
+
+#define MXC_PMIC_REG_NUM(reg) (((reg) & 0x3f) << 25)
+#define MXC_PMIC_WRITE (1 << 31)
+
+static int mc34708_spi_reg_read(struct mc34708 *mc34708, enum mc34708_reg reg, u32 *val)
+{
+ uint32_t buf;
+
+ buf = MXC_PMIC_REG_NUM(reg);
+
+ spi_rw(mc34708->spi, &buf, 4);
+
+ *val = buf;
+
+ return 0;
+}
+
+static int mc34708_spi_reg_write(struct mc34708 *mc34708, enum mc34708_reg reg, u32 val)
+{
+ uint32_t buf = MXC_PMIC_REG_NUM(reg) | MXC_PMIC_WRITE | (val & 0xffffff);
+
+ spi_rw(mc34708->spi, &buf, 4);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_I2C
+static int mc34708_i2c_reg_read(struct mc34708 *mc34708, enum mc34708_reg reg, u32 *val)
+{
+ u8 buf[3];
+ int ret;
+
+ ret = i2c_read_reg(mc34708->client, reg, buf, 3);
+ *val = buf[0] << 16 | buf[1] << 8 | buf[2] << 0;
+
+ return ret == 3 ? 0 : ret;
+}
+
+static int mc34708_i2c_reg_write(struct mc34708 *mc34708, enum mc34708_reg reg, u32 val)
+{
+ u8 buf[] = {
+ val >> 16,
+ val >> 8,
+ val >> 0,
+ };
+ int ret;
+
+ ret = i2c_write_reg(mc34708->client, reg, buf, 3);
+
+ return ret == 3 ? 0 : ret;
+}
+#endif
+
+int mc34708_reg_write(struct mc34708 *mc34708, enum mc34708_reg reg, u32 val)
+{
+#ifdef CONFIG_I2C
+ if (mc34708->mode == MC34708_MODE_I2C)
+ return mc34708_i2c_reg_write(mc34708, reg, val);
+#endif
+#ifdef CONFIG_SPI
+ if (mc34708->mode == MC34708_MODE_SPI)
+ return mc34708_spi_reg_write(mc34708, reg, val);
+#endif
+ return -EINVAL;
+}
+EXPORT_SYMBOL(mc34708_reg_write);
+
+int mc34708_reg_read(struct mc34708 *mc34708, enum mc34708_reg reg, u32 *val)
+{
+#ifdef CONFIG_I2C
+ if (mc34708->mode == MC34708_MODE_I2C)
+ return mc34708_i2c_reg_read(mc34708, reg, val);
+#endif
+#ifdef CONFIG_SPI
+ if (mc34708->mode == MC34708_MODE_SPI)
+ return mc34708_spi_reg_read(mc34708, reg, val);
+#endif
+ return -EINVAL;
+}
+EXPORT_SYMBOL(mc34708_reg_read);
+
+int mc34708_set_bits(struct mc34708 *mc34708, enum mc34708_reg reg, u32 mask, u32 val)
+{
+ u32 tmp;
+ int err;
+
+ err = mc34708_reg_read(mc34708, reg, &tmp);
+ tmp = (tmp & ~mask) | val;
+
+ if (!err)
+ err = mc34708_reg_write(mc34708, reg, tmp);
+
+ return err;
+}
+EXPORT_SYMBOL(mc34708_set_bits);
+
+static ssize_t mc_read(struct cdev *cdev, void *_buf, size_t count, ulong offset, ulong flags)
+{
+ struct mc34708 *priv = to_mc34708(cdev);
+ u32 *buf = _buf;
+ size_t i = count >> 2;
+ int err;
+
+ offset >>= 2;
+
+ while (i) {
+ err = mc34708_reg_read(priv, offset, buf);
+ if (err)
+ return (ssize_t)err;
+ buf++;
+ i--;
+ offset++;
+ }
+
+ return count;
+}
+
+static ssize_t mc_write(struct cdev *cdev, const void *_buf, size_t count, ulong offset, ulong flags)
+{
+ struct mc34708 *mc34708 = to_mc34708(cdev);
+ const u32 *buf = _buf;
+ size_t i = count >> 2;
+ int err;
+
+ offset >>= 2;
+
+ while (i) {
+ err = mc34708_reg_write(mc34708, offset, *buf);
+ if (err)
+ return (ssize_t)err;
+ buf++;
+ i--;
+ offset++;
+ }
+
+ return count;
+}
+
+static struct file_operations mc_fops = {
+ .lseek = dev_lseek_default,
+ .read = mc_read,
+ .write = mc_write,
+};
+
+static int mc34708_query_revision(struct mc34708 *mc34708)
+{
+ unsigned int rev_id;
+ int rev;
+
+ mc34708_reg_read(mc34708, 7, &rev_id);
+
+ if (rev_id > 0xFFF)
+ return -EINVAL;
+
+ rev = rev_id & 0xFFF;
+
+ dev_info(mc_dev->cdev.dev, "MC34708 ID: 0x%04x\n", rev);
+
+ mc34708->revision = rev;
+
+ return rev;
+}
+
+static int mc_probe(struct device_d *dev, enum mc34708_mode mode)
+{
+ int rev;
+
+ if (mc_dev)
+ return -EBUSY;
+
+ mc_dev = xzalloc(sizeof(struct mc34708));
+ mc_dev->mode = mode;
+ mc_dev->cdev.name = DRIVERNAME;
+ if (mode == MC34708_MODE_I2C) {
+ mc_dev->client = to_i2c_client(dev);
+ }
+ if (mode == MC34708_MODE_SPI) {
+ mc_dev->spi = dev->type_data;
+ mc_dev->spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
+ mc_dev->spi->bits_per_word = 32;
+ }
+ mc_dev->cdev.size = 256;
+ mc_dev->cdev.dev = dev;
+ mc_dev->cdev.ops = &mc_fops;
+
+ rev = mc34708_query_revision(mc_dev);
+ if (rev < 0) {
+ free(mc_dev);
+ mc_dev = NULL;
+ return -EINVAL;
+ }
+
+ devfs_create(&mc_dev->cdev);
+
+ return 0;
+}
+
+static int mc_i2c_probe(struct device_d *dev)
+{
+ return mc_probe(dev, MC34708_MODE_I2C);
+}
+
+static int mc_spi_probe(struct device_d *dev)
+{
+ return mc_probe(dev, MC34708_MODE_SPI);
+}
+
+static struct driver_d mc_i2c_driver = {
+ .name = "mc34708-i2c",
+ .probe = mc_i2c_probe,
+};
+
+static struct driver_d mc_spi_driver = {
+ .name = "mc34708-spi",
+ .probe = mc_spi_probe,
+};
+
+static int mc_init(void)
+{
+ register_driver(&mc_i2c_driver);
+ register_driver(&mc_spi_driver);
+ return 0;
+}
+
+device_initcall(mc_init);
diff --git a/include/mfd/mc34708.h b/include/mfd/mc34708.h
new file mode 100644
index 0000000..f384c62
--- /dev/null
+++ b/include/mfd/mc34708.h
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2009 Marc Kleine-Budde <mkl at pengutronix.de>
+ *
+ * This file is released under the GPLv2
+ *
+ * Derived from:
+ * - arch-mxc/pmic_external.h -- contains interface of the PMIC protocol driver
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ */
+
+#ifndef __ASM_ARCH_MC34708_H
+#define __ASM_ARCH_MC34708_H
+
+enum mc34708_reg {
+ MC34708_REG_INT_STATUS0 = 0x00,
+ MC34708_REG_INT_MASK0 = 0x01,
+ MC34708_REG_INT_SENSE0 = 0x02,
+ MC34708_REG_INT_STATUS1 = 0x03,
+ MC34708_REG_INT_MASK1 = 0x04,
+ MC34708_REG_INT_SENSE1 = 0x05,
+ MC34708_REG_PU_MODE_S = 0x06,
+ MC34708_REG_IDENTIFICATION = 0x07,
+ MC34708_REG_REG_FAULT_S = 0x08,
+ MC34708_REG_ACC0 = 0x09,
+ MC34708_REG_ACC1 = 0x0a,
+ MC34708_REG_ACC2 = 0x0b,
+ MC34708_REG_UNUSED0 = 0x0c,
+ MC34708_REG_POWER_CTL0 = 0x0d,
+ MC34708_REG_POWER_CTL1 = 0x0e,
+ MC34708_REG_POWER_CTL2 = 0x0f,
+ MC34708_REG_MEM_A = 0x10,
+ MC34708_REG_MEM_B = 0x11,
+ MC34708_REG_MEM_C = 0x12,
+ MC34708_REG_MEM_D = 0x13,
+ MC34708_REG_RTC_TIME = 0x14,
+ MC34708_REG_RTC_ALARM = 0x15,
+ MC34708_REG_RTC_DAY = 0x16,
+ MC34708_REG_RTC_DAY_ALARM = 0x17,
+ MC34708_REG_1 = 0x18,
+ MC34708_REG_2_3 = 0x19,
+ MC34708_REG_4 = 0x1a,
+ MC34708_REG_5 = 0x1b,
+ MC34708_REG_1_2_MODE = 0x1c,
+ MC34708_REG_3_4_5_MODE = 0x1d,
+ MC34708_REG_SETTING_0 = 0x1e,
+ MC34708_REG_SWBST_CTRL = 0x1f,
+ MC34708_REG_MODE_0 = 0x20,
+ MC34708_REG_GPIOLV0_CTRL = 0x21,
+ MC34708_REG_GPIOLV1_CTRL = 0x22,
+ MC34708_REG_GPIOLV2_CTRL = 0x23,
+ MC34708_REG_GPIOLV3_CTRL = 0x24,
+ MC34708_REG_USB_TIMING = 0x25,
+ MC34708_REG_USB_BUTTON = 0x26,
+ MC34708_REG_USB_CTRL = 0x27,
+ MC34708_REG_USB_DEVTYPE = 0x28,
+ MC34708_REG_UNUSED1 = 0x29,
+ MC34708_REG_UNUSED2 = 0x2a,
+ MC34708_REG_ADC0 = 0x2b,
+ MC34708_REG_ADC1 = 0x2c,
+ MC34708_REG_ADC2 = 0x2d,
+ MC34708_REG_ADC3 = 0x2e,
+ MC34708_REG_ADC4 = 0x2f,
+ MC34708_REG_ADC5 = 0x30,
+ MC34708_REG_ADC6 = 0x31,
+ MC34708_REG_ADC7 = 0x32,
+ MC34708_REG_BAT_PROFILE = 0x33,
+ MC34708_REG_CHRG_DEBOUNCE = 0x34,
+ MC34708_REG_CHRG_SOURCE = 0x35,
+ MC34708_REG_CHRG_LED_CTRL = 0x36,
+ MC34708_REG_PWM_CTRL = 0x37,
+ MC34708_REG_UNUSED3 = 0x38,
+ MC34708_REG_UNUSED4 = 0x39,
+ MC34708_REG_UNUSED5 = 0x3a,
+ MC34708_REG_UNUSED6 = 0x3b,
+ MC34708_REG_UNUSED7 = 0x3c,
+ MC34708_REG_UNUSED8 = 0x3d,
+ MC34708_REG_UNUSED9 = 0x3e,
+ MC34708_REG_UNUSED10 = 0x3f,
+};
+
+
+enum mc34708_mode {
+ MC34708_MODE_I2C,
+ MC34708_MODE_SPI,
+};
+
+struct mc34708 {
+ struct cdev cdev;
+ struct i2c_client *client;
+ struct spi_device *spi;
+ enum mc34708_mode mode;
+ unsigned int revision;
+};
+
+extern struct mc34708 *mc34708_get(void);
+
+extern int mc34708_reg_read(struct mc34708 *mc34708, enum mc34708_reg reg, u32 *val);
+extern int mc34708_reg_write(struct mc34708 *mc34708, enum mc34708_reg reg, u32 val);
+extern int mc34708_set_bits(struct mc34708 *mc34708, enum mc34708_reg reg, u32 mask, u32 val);
+
+#endif /* __ASM_ARCH_MC34708_H */
--
1.7.7.6
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