* [PATCH v4 1/4] mfd: mc13xxx-core: Prepare for separate spi and i2c backends.
[not found] ` <1332129838-7080-1-git-send-email-marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
@ 2012-03-19 4:03 ` Marc Reilly
2012-03-19 4:03 ` [PATCH v4 2/4] mfd: mc13xxx-core: use regmap for register access Marc Reilly
` (2 subsequent siblings)
3 siblings, 0 replies; 7+ messages in thread
From: Marc Reilly @ 2012-03-19 4:03 UTC (permalink / raw)
To: sameo-VuQAYsv1563Yd54FQh9/CA
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
linux-i2c-u79uwXL29TY76Z2rM5mHXA, Marc Reilly,
u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
oskar-fYPSZ7JpQqsAvxtiuMwx3w
This patch abstracts the bus specific operations from the driver core.
Generic init and cleanup is consolidated into mc13xxx_common_*.
spi specific functions are renamed to reflect such.
(The irq member of the mc13xxx struct is no longer redundant, it's used
to store the irq for cleanup time).
Signed-off-by: Marc Reilly <marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
---
drivers/mfd/mc13xxx-core.c | 187 ++++++++++++++++++++++++++------------------
1 files changed, 112 insertions(+), 75 deletions(-)
diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 7122386..0753402 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -22,8 +22,18 @@
#include <linux/of_device.h>
#include <linux/of_gpio.h>
+enum mc13xxx_id {
+ MC13XXX_ID_MC13783,
+ MC13XXX_ID_MC13892,
+ MC13XXX_ID_INVALID,
+};
+
struct mc13xxx {
struct spi_device *spidev;
+
+ struct device *dev;
+ enum mc13xxx_id ictype;
+
struct mutex lock;
int irq;
int flags;
@@ -144,36 +154,32 @@ struct mc13xxx {
void mc13xxx_lock(struct mc13xxx *mc13xxx)
{
if (!mutex_trylock(&mc13xxx->lock)) {
- dev_dbg(&mc13xxx->spidev->dev, "wait for %s from %pf\n",
+ dev_dbg(mc13xxx->dev, "wait for %s from %pf\n",
__func__, __builtin_return_address(0));
mutex_lock(&mc13xxx->lock);
}
- dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
+ dev_dbg(mc13xxx->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
}
EXPORT_SYMBOL(mc13xxx_lock);
void mc13xxx_unlock(struct mc13xxx *mc13xxx)
{
- dev_dbg(&mc13xxx->spidev->dev, "%s from %pf\n",
+ dev_dbg(mc13xxx->dev, "%s from %pf\n",
__func__, __builtin_return_address(0));
mutex_unlock(&mc13xxx->lock);
}
EXPORT_SYMBOL(mc13xxx_unlock);
#define MC13XXX_REGOFFSET_SHIFT 25
-int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
+static int mc13xxx_spi_reg_read(struct mc13xxx *mc13xxx,
+ unsigned int offset, u32 *val)
{
struct spi_transfer t;
struct spi_message m;
int ret;
- BUG_ON(!mutex_is_locked(&mc13xxx->lock));
-
- if (offset > MC13XXX_NUMREGS)
- return -EINVAL;
-
*val = offset << MC13XXX_REGOFFSET_SHIFT;
memset(&t, 0, sizeof(t));
@@ -195,26 +201,17 @@ int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
*val &= 0xffffff;
- dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
-
return 0;
}
-EXPORT_SYMBOL(mc13xxx_reg_read);
-int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
+static int mc13xxx_spi_reg_write(struct mc13xxx *mc13xxx, unsigned int offset,
+ u32 val)
{
u32 buf;
struct spi_transfer t;
struct spi_message m;
int ret;
- BUG_ON(!mutex_is_locked(&mc13xxx->lock));
-
- dev_vdbg(&mc13xxx->spidev->dev, "[0x%02x] <- 0x%06x\n", offset, val);
-
- if (offset > MC13XXX_NUMREGS || val > 0xffffff)
- return -EINVAL;
-
buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val;
memset(&t, 0, sizeof(t));
@@ -235,6 +232,34 @@ int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
return 0;
}
+
+int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
+{
+ int ret;
+
+ BUG_ON(!mutex_is_locked(&mc13xxx->lock));
+
+ if (offset > MC13XXX_NUMREGS)
+ return -EINVAL;
+
+ ret = mc13xxx_spi_reg_read(mc13xxx, offset, val);
+ dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
+
+ return ret;
+}
+EXPORT_SYMBOL(mc13xxx_reg_read);
+
+int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
+{
+ BUG_ON(!mutex_is_locked(&mc13xxx->lock));
+
+ dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x\n", offset, val);
+
+ if (offset > MC13XXX_NUMREGS || val > 0xffffff)
+ return -EINVAL;
+
+ return mc13xxx_spi_reg_write(mc13xxx, offset, val);
+}
EXPORT_SYMBOL(mc13xxx_reg_write);
int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
@@ -439,7 +464,7 @@ static int mc13xxx_irq_handle(struct mc13xxx *mc13xxx,
if (handled == IRQ_HANDLED)
num_handled++;
} else {
- dev_err(&mc13xxx->spidev->dev,
+ dev_err(mc13xxx->dev,
"BUG: irq %u but no handler\n",
baseirq + irq);
@@ -475,25 +500,23 @@ static irqreturn_t mc13xxx_irq_thread(int irq, void *data)
return IRQ_RETVAL(handled);
}
-enum mc13xxx_id {
- MC13XXX_ID_MC13783,
- MC13XXX_ID_MC13892,
- MC13XXX_ID_INVALID,
-};
-
static const char *mc13xxx_chipname[] = {
[MC13XXX_ID_MC13783] = "mc13783",
[MC13XXX_ID_MC13892] = "mc13892",
};
#define maskval(reg, mask) (((reg) & (mask)) >> __ffs(mask))
-static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id)
+static int mc13xxx_identify(struct mc13xxx *mc13xxx)
{
u32 icid;
u32 revision;
- const char *name;
int ret;
+ /*
+ * Get the generation ID from register 46, as apparently some older
+ * IC revisions only have this info at this location. Newer ICs seem to
+ * have both.
+ */
ret = mc13xxx_reg_read(mc13xxx, 46, &icid);
if (ret)
return ret;
@@ -502,26 +525,23 @@ static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id)
switch (icid) {
case 2:
- *id = MC13XXX_ID_MC13783;
- name = "mc13783";
+ mc13xxx->ictype = MC13XXX_ID_MC13783;
break;
case 7:
- *id = MC13XXX_ID_MC13892;
- name = "mc13892";
+ mc13xxx->ictype = MC13XXX_ID_MC13892;
break;
default:
- *id = MC13XXX_ID_INVALID;
+ mc13xxx->ictype = MC13XXX_ID_INVALID;
break;
}
- if (*id == MC13XXX_ID_MC13783 || *id == MC13XXX_ID_MC13892) {
+ if (mc13xxx->ictype == MC13XXX_ID_MC13783 ||
+ mc13xxx->ictype == MC13XXX_ID_MC13892) {
ret = mc13xxx_reg_read(mc13xxx, MC13XXX_REVISION, &revision);
- if (ret)
- return ret;
- dev_info(&mc13xxx->spidev->dev, "%s: rev: %d.%d, "
+ dev_info(mc13xxx->dev, "%s: rev: %d.%d, "
"fin: %d, fab: %d, icid: %d/%d\n",
- mc13xxx_chipname[*id],
+ mc13xxx_chipname[mc13xxx->ictype],
maskval(revision, MC13XXX_REVISION_REVFULL),
maskval(revision, MC13XXX_REVISION_REVMETAL),
maskval(revision, MC13XXX_REVISION_FIN),
@@ -530,26 +550,12 @@ static int mc13xxx_identify(struct mc13xxx *mc13xxx, enum mc13xxx_id *id)
maskval(revision, MC13XXX_REVISION_ICIDCODE));
}
- if (*id != MC13XXX_ID_INVALID) {
- const struct spi_device_id *devid =
- spi_get_device_id(mc13xxx->spidev);
- if (!devid || devid->driver_data != *id)
- dev_warn(&mc13xxx->spidev->dev, "device id doesn't "
- "match auto detection!\n");
- }
-
- return 0;
+ return (mc13xxx->ictype == MC13XXX_ID_INVALID) ? -ENODEV : 0;
}
static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
{
- const struct spi_device_id *devid =
- spi_get_device_id(mc13xxx->spidev);
-
- if (!devid)
- return NULL;
-
- return mc13xxx_chipname[devid->driver_data];
+ return mc13xxx_chipname[mc13xxx->ictype];
}
int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
@@ -589,7 +595,7 @@ int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
};
init_completion(&adcdone_data.done);
- dev_dbg(&mc13xxx->spidev->dev, "%s\n", __func__);
+ dev_dbg(mc13xxx->dev, "%s\n", __func__);
mc13xxx_lock(mc13xxx);
@@ -631,7 +637,7 @@ int mc13xxx_adc_do_conversion(struct mc13xxx *mc13xxx, unsigned int mode,
return -EINVAL;
}
- dev_dbg(&mc13xxx->spidev->dev, "%s: request irq\n", __func__);
+ dev_dbg(mc13xxx->dev, "%s: request irq\n", __func__);
mc13xxx_irq_request(mc13xxx, MC13XXX_IRQ_ADCDONE,
mc13xxx_handler_adcdone, __func__, &adcdone_data);
mc13xxx_irq_ack(mc13xxx, MC13XXX_IRQ_ADCDONE);
@@ -689,7 +695,7 @@ static int mc13xxx_add_subdevice_pdata(struct mc13xxx *mc13xxx,
if (!cell.name)
return -ENOMEM;
- return mfd_add_devices(&mc13xxx->spidev->dev, -1, &cell, 1, NULL, 0);
+ return mfd_add_devices(mc13xxx->dev, -1, &cell, 1, NULL, 0);
}
static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
@@ -700,7 +706,7 @@ static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
#ifdef CONFIG_OF
static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
{
- struct device_node *np = mc13xxx->spidev->dev.of_node;
+ struct device_node *np = mc13xxx->dev.of_node;
if (!np)
return -ENODEV;
@@ -746,13 +752,17 @@ static const struct of_device_id mc13xxx_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
-static int mc13xxx_probe(struct spi_device *spi)
+static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
+ struct mc13xxx_platform_data *pdata, int irq);
+
+static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx);
+
+static int mc13xxx_spi_probe(struct spi_device *spi)
{
const struct of_device_id *of_id;
struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
struct mc13xxx *mc13xxx;
struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
- enum mc13xxx_id id;
int ret;
of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
@@ -768,13 +778,34 @@ static int mc13xxx_probe(struct spi_device *spi)
spi->bits_per_word = 32;
spi_setup(spi);
+ mc13xxx->dev = &spi->dev;
mc13xxx->spidev = spi;
+ ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
+
+ if (ret) {
+ dev_set_drvdata(&spi->dev, NULL);
+ } else {
+ const struct spi_device_id *devid =
+ spi_get_device_id(mc13xxx->spidev);
+ if (!devid || devid->driver_data != mc13xxx->ictype)
+ dev_warn(mc13xxx->dev,
+ "device id doesn't match auto detection!\n");
+ }
+
+ return ret;
+}
+
+static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
+ struct mc13xxx_platform_data *pdata, int irq)
+{
+ int ret;
+
mutex_init(&mc13xxx->lock);
mc13xxx_lock(mc13xxx);
- ret = mc13xxx_identify(mc13xxx, &id);
- if (ret || id == MC13XXX_ID_INVALID)
+ ret = mc13xxx_identify(mc13xxx);
+ if (ret)
goto err_revision;
/* mask all irqs */
@@ -786,18 +817,19 @@ static int mc13xxx_probe(struct spi_device *spi)
if (ret)
goto err_mask;
- ret = request_threaded_irq(spi->irq, NULL, mc13xxx_irq_thread,
+ ret = request_threaded_irq(irq, NULL, mc13xxx_irq_thread,
IRQF_ONESHOT | IRQF_TRIGGER_HIGH, "mc13xxx", mc13xxx);
if (ret) {
err_mask:
err_revision:
mc13xxx_unlock(mc13xxx);
- dev_set_drvdata(&spi->dev, NULL);
kfree(mc13xxx);
return ret;
}
+ mc13xxx->irq = irq;
+
mc13xxx_unlock(mc13xxx);
if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
@@ -831,39 +863,44 @@ err_revision:
return 0;
}
-static int __devexit mc13xxx_remove(struct spi_device *spi)
+static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
{
struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
- free_irq(mc13xxx->spidev->irq, mc13xxx);
+ mc13xxx_common_cleanup(mc13xxx);
- mfd_remove_devices(&spi->dev);
+ return 0;
+}
- kfree(mc13xxx);
+static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
+{
+ free_irq(mc13xxx->irq, mc13xxx);
- return 0;
+ mfd_remove_devices(mc13xxx->dev);
+
+ kfree(mc13xxx);
}
-static struct spi_driver mc13xxx_driver = {
+static struct spi_driver mc13xxx_spi_driver = {
.id_table = mc13xxx_device_id,
.driver = {
.name = "mc13xxx",
.owner = THIS_MODULE,
.of_match_table = mc13xxx_dt_ids,
},
- .probe = mc13xxx_probe,
- .remove = __devexit_p(mc13xxx_remove),
+ .probe = mc13xxx_spi_probe,
+ .remove = __devexit_p(mc13xxx_spi_remove),
};
static int __init mc13xxx_init(void)
{
- return spi_register_driver(&mc13xxx_driver);
+ return spi_register_driver(&mc13xxx_spi_driver);
}
subsys_initcall(mc13xxx_init);
static void __exit mc13xxx_exit(void)
{
- spi_unregister_driver(&mc13xxx_driver);
+ spi_unregister_driver(&mc13xxx_spi_driver);
}
module_exit(mc13xxx_exit);
--
1.7.3.4
------------------------------------------------------------------------------
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v4 2/4] mfd: mc13xxx-core: use regmap for register access
[not found] ` <1332129838-7080-1-git-send-email-marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
2012-03-19 4:03 ` [PATCH v4 1/4] mfd: mc13xxx-core: Prepare for separate spi and i2c backends Marc Reilly
@ 2012-03-19 4:03 ` Marc Reilly
[not found] ` <1332129838-7080-3-git-send-email-marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
2012-03-19 4:03 ` [PATCH v4 3/4] mfd: mc13xxx-core: Move spi specific code into separate module Marc Reilly
2012-03-19 4:03 ` [PATCH v4 4/4] mfd: mc13xxx: Add i2c driver Marc Reilly
3 siblings, 1 reply; 7+ messages in thread
From: Marc Reilly @ 2012-03-19 4:03 UTC (permalink / raw)
To: sameo-VuQAYsv1563Yd54FQh9/CA
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
linux-i2c-u79uwXL29TY76Z2rM5mHXA, Marc Reilly,
u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
oskar-fYPSZ7JpQqsAvxtiuMwx3w
This change converts the mc13xxx core to use regmap rather than direct
spi r/w.
The spidev member of mc13xxx struct becomes redundant and is removed.
Extra debugging aids are added to mc13xxx_reg_rmw.
Mutex init is moved to before regmap init.
Signed-off-by: Marc Reilly <marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
---
drivers/mfd/mc13xxx-core.c | 111 +++++++++++++-------------------------------
1 files changed, 33 insertions(+), 78 deletions(-)
diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 0753402..2c35d6d 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -21,6 +21,8 @@
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
enum mc13xxx_id {
MC13XXX_ID_MC13783,
@@ -29,7 +31,7 @@ enum mc13xxx_id {
};
struct mc13xxx {
- struct spi_device *spidev;
+ struct regmap *regmap;
struct device *dev;
enum mc13xxx_id ictype;
@@ -172,67 +174,6 @@ void mc13xxx_unlock(struct mc13xxx *mc13xxx)
}
EXPORT_SYMBOL(mc13xxx_unlock);
-#define MC13XXX_REGOFFSET_SHIFT 25
-static int mc13xxx_spi_reg_read(struct mc13xxx *mc13xxx,
- unsigned int offset, u32 *val)
-{
- struct spi_transfer t;
- struct spi_message m;
- int ret;
-
- *val = offset << MC13XXX_REGOFFSET_SHIFT;
-
- memset(&t, 0, sizeof(t));
-
- t.tx_buf = val;
- t.rx_buf = val;
- t.len = sizeof(u32);
-
- spi_message_init(&m);
- spi_message_add_tail(&t, &m);
-
- ret = spi_sync(mc13xxx->spidev, &m);
-
- /* error in message.status implies error return from spi_sync */
- BUG_ON(!ret && m.status);
-
- if (ret)
- return ret;
-
- *val &= 0xffffff;
-
- return 0;
-}
-
-static int mc13xxx_spi_reg_write(struct mc13xxx *mc13xxx, unsigned int offset,
- u32 val)
-{
- u32 buf;
- struct spi_transfer t;
- struct spi_message m;
- int ret;
-
- buf = 1 << 31 | offset << MC13XXX_REGOFFSET_SHIFT | val;
-
- memset(&t, 0, sizeof(t));
-
- t.tx_buf = &buf;
- t.rx_buf = &buf;
- t.len = sizeof(u32);
-
- spi_message_init(&m);
- spi_message_add_tail(&t, &m);
-
- ret = spi_sync(mc13xxx->spidev, &m);
-
- BUG_ON(!ret && m.status);
-
- if (ret)
- return ret;
-
- return 0;
-}
-
int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
{
int ret;
@@ -242,7 +183,7 @@ int mc13xxx_reg_read(struct mc13xxx *mc13xxx, unsigned int offset, u32 *val)
if (offset > MC13XXX_NUMREGS)
return -EINVAL;
- ret = mc13xxx_spi_reg_read(mc13xxx, offset, val);
+ ret = regmap_read(mc13xxx->regmap, offset, val);
dev_vdbg(mc13xxx->dev, "[0x%02x] -> 0x%06x\n", offset, *val);
return ret;
@@ -258,25 +199,19 @@ int mc13xxx_reg_write(struct mc13xxx *mc13xxx, unsigned int offset, u32 val)
if (offset > MC13XXX_NUMREGS || val > 0xffffff)
return -EINVAL;
- return mc13xxx_spi_reg_write(mc13xxx, offset, val);
+ return regmap_write(mc13xxx->regmap, offset, val);
}
EXPORT_SYMBOL(mc13xxx_reg_write);
int mc13xxx_reg_rmw(struct mc13xxx *mc13xxx, unsigned int offset,
u32 mask, u32 val)
{
- int ret;
- u32 valread;
-
+ BUG_ON(!mutex_is_locked(&mc13xxx->lock));
BUG_ON(val & ~mask);
+ dev_vdbg(mc13xxx->dev, "[0x%02x] <- 0x%06x (mask: 0x%06x)\n",
+ offset, val, mask);
- ret = mc13xxx_reg_read(mc13xxx, offset, &valread);
- if (ret)
- return ret;
-
- valread = (valread & ~mask) | val;
-
- return mc13xxx_reg_write(mc13xxx, offset, valread);
+ return regmap_update_bits(mc13xxx->regmap, offset, mask, val);
}
EXPORT_SYMBOL(mc13xxx_reg_rmw);
@@ -752,6 +687,16 @@ static const struct of_device_id mc13xxx_dt_ids[] = {
};
MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
+static struct regmap_config mc13xxx_regmap_spi_config = {
+ .reg_bits = 7,
+ .pad_bits = 1,
+ .val_bits = 24,
+
+ .max_register = MC13XXX_NUMREGS,
+
+ .cache_type = REGCACHE_NONE,
+};
+
static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
struct mc13xxx_platform_data *pdata, int irq);
@@ -776,10 +721,19 @@ static int mc13xxx_spi_probe(struct spi_device *spi)
dev_set_drvdata(&spi->dev, mc13xxx);
spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
spi->bits_per_word = 32;
- spi_setup(spi);
mc13xxx->dev = &spi->dev;
- mc13xxx->spidev = spi;
+ mutex_init(&mc13xxx->lock);
+
+ mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
+ if (IS_ERR(mc13xxx->regmap)) {
+ ret = PTR_ERR(mc13xxx->regmap);
+ dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
+ ret);
+ dev_set_drvdata(&spi->dev, NULL);
+ kfree(mc13xxx);
+ return ret;
+ }
ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
@@ -787,7 +741,7 @@ static int mc13xxx_spi_probe(struct spi_device *spi)
dev_set_drvdata(&spi->dev, NULL);
} else {
const struct spi_device_id *devid =
- spi_get_device_id(mc13xxx->spidev);
+ spi_get_device_id(spi);
if (!devid || devid->driver_data != mc13xxx->ictype)
dev_warn(mc13xxx->dev,
"device id doesn't match auto detection!\n");
@@ -801,7 +755,6 @@ static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
{
int ret;
- mutex_init(&mc13xxx->lock);
mc13xxx_lock(mc13xxx);
ret = mc13xxx_identify(mc13xxx);
@@ -878,6 +831,8 @@ static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
mfd_remove_devices(mc13xxx->dev);
+ regmap_exit(mc13xxx->regmap);
+
kfree(mc13xxx);
}
--
1.7.3.4
------------------------------------------------------------------------------
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v4 3/4] mfd: mc13xxx-core: Move spi specific code into separate module.
[not found] ` <1332129838-7080-1-git-send-email-marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
2012-03-19 4:03 ` [PATCH v4 1/4] mfd: mc13xxx-core: Prepare for separate spi and i2c backends Marc Reilly
2012-03-19 4:03 ` [PATCH v4 2/4] mfd: mc13xxx-core: use regmap for register access Marc Reilly
@ 2012-03-19 4:03 ` Marc Reilly
2012-03-19 4:03 ` [PATCH v4 4/4] mfd: mc13xxx: Add i2c driver Marc Reilly
3 siblings, 0 replies; 7+ messages in thread
From: Marc Reilly @ 2012-03-19 4:03 UTC (permalink / raw)
To: sameo-VuQAYsv1563Yd54FQh9/CA
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
linux-i2c-u79uwXL29TY76Z2rM5mHXA, Marc Reilly,
u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
oskar-fYPSZ7JpQqsAvxtiuMwx3w
All spi specific code is moved into a new module. The mc13xxx struct
moves to a new local include file by necessity.
A new config choice selects the SPI bus type support and by default is
value of SPI_MASTER to remain compatible with existing configs.
Signed-off-by: Marc Reilly <marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
---
drivers/mfd/Kconfig | 15 ++++-
drivers/mfd/Makefile | 1 +
drivers/mfd/mc13xxx-core.c | 148 ++------------------------------------------
drivers/mfd/mc13xxx-spi.c | 140 +++++++++++++++++++++++++++++++++++++++++
drivers/mfd/mc13xxx.h | 45 +++++++++++++
5 files changed, 203 insertions(+), 146 deletions(-)
create mode 100644 drivers/mfd/mc13xxx-spi.c
create mode 100644 drivers/mfd/mc13xxx.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index cd13e9f..501fee5 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -577,12 +577,21 @@ config MFD_MC13XXX
select MFD_CORE
select MFD_MC13783
help
- Support for the Freescale (Atlas) PMIC and audio CODECs
- MC13783 and MC13892.
- This driver provides common support for accessing the device,
+ Enable support for the Freescale MC13783 and MC13892 PMICs.
+ This driver provides common support for accessing the device,
additional drivers must be enabled in order to use the
functionality of the device.
+if MFD_MC13XXX
+
+config MFD_MC13XXX_SPI
+ tristate "MC13xxx SPI interface" if SPI_MASTER
+ default SPI_MASTER
+ help
+ Select this if your MC13xxx is connected via an SPI bus.
+
+endif
+
config ABX500_CORE
bool "ST-Ericsson ABX500 Mixed Signal Circuit register functions"
default y if ARCH_U300 || ARCH_U8500
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index b953bab..2dc66ed 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_TWL6030_PWM) += twl6030-pwm.o
obj-$(CONFIG_TWL6040_CORE) += twl6040-core.o twl6040-irq.o
obj-$(CONFIG_MFD_MC13XXX) += mc13xxx-core.o
+obj-$(CONFIG_MFD_MC13XXX_SPI) += mc13xxx-spi.o
obj-$(CONFIG_MFD_CORE) += mfd-core.o
diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 2c35d6d..31dbf91 100644
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -15,36 +15,13 @@
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/interrupt.h>
-#include <linux/spi/spi.h>
#include <linux/mfd/core.h>
#include <linux/mfd/mc13xxx.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
-#include <linux/regmap.h>
-#include <linux/err.h>
-enum mc13xxx_id {
- MC13XXX_ID_MC13783,
- MC13XXX_ID_MC13892,
- MC13XXX_ID_INVALID,
-};
-
-struct mc13xxx {
- struct regmap *regmap;
-
- struct device *dev;
- enum mc13xxx_id ictype;
-
- struct mutex lock;
- int irq;
- int flags;
-
- irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
- void *irqdata[MC13XXX_NUM_IRQ];
-
- int adcflags;
-};
+#include "mc13xxx.h"
#define MC13XXX_IRQSTAT0 0
#define MC13XXX_IRQSTAT0_ADCDONEI (1 << 0)
@@ -151,8 +128,6 @@ struct mc13xxx {
#define MC13XXX_ADC2 45
-#define MC13XXX_NUMREGS 0x3f
-
void mc13xxx_lock(struct mc13xxx *mc13xxx)
{
if (!mutex_trylock(&mc13xxx->lock)) {
@@ -667,90 +642,7 @@ static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
}
#endif
-static const struct spi_device_id mc13xxx_device_id[] = {
- {
- .name = "mc13783",
- .driver_data = MC13XXX_ID_MC13783,
- }, {
- .name = "mc13892",
- .driver_data = MC13XXX_ID_MC13892,
- }, {
- /* sentinel */
- }
-};
-MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
-
-static const struct of_device_id mc13xxx_dt_ids[] = {
- { .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
- { .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
-
-static struct regmap_config mc13xxx_regmap_spi_config = {
- .reg_bits = 7,
- .pad_bits = 1,
- .val_bits = 24,
-
- .max_register = MC13XXX_NUMREGS,
-
- .cache_type = REGCACHE_NONE,
-};
-
-static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
- struct mc13xxx_platform_data *pdata, int irq);
-
-static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx);
-
-static int mc13xxx_spi_probe(struct spi_device *spi)
-{
- const struct of_device_id *of_id;
- struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
- struct mc13xxx *mc13xxx;
- struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
- int ret;
-
- of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
- if (of_id)
- sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
-
- mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
- if (!mc13xxx)
- return -ENOMEM;
-
- dev_set_drvdata(&spi->dev, mc13xxx);
- spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
- spi->bits_per_word = 32;
-
- mc13xxx->dev = &spi->dev;
- mutex_init(&mc13xxx->lock);
-
- mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
- if (IS_ERR(mc13xxx->regmap)) {
- ret = PTR_ERR(mc13xxx->regmap);
- dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
- ret);
- dev_set_drvdata(&spi->dev, NULL);
- kfree(mc13xxx);
- return ret;
- }
-
- ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
-
- if (ret) {
- dev_set_drvdata(&spi->dev, NULL);
- } else {
- const struct spi_device_id *devid =
- spi_get_device_id(spi);
- if (!devid || devid->driver_data != mc13xxx->ictype)
- dev_warn(mc13xxx->dev,
- "device id doesn't match auto detection!\n");
- }
-
- return ret;
-}
-
-static int mc13xxx_common_init(struct mc13xxx *mc13xxx,
+int mc13xxx_common_init(struct mc13xxx *mc13xxx,
struct mc13xxx_platform_data *pdata, int irq)
{
int ret;
@@ -815,17 +707,9 @@ err_revision:
return 0;
}
+EXPORT_SYMBOL_GPL(mc13xxx_common_init);
-static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
-{
- struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
-
- mc13xxx_common_cleanup(mc13xxx);
-
- return 0;
-}
-
-static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
+void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
{
free_irq(mc13xxx->irq, mc13xxx);
@@ -835,29 +719,7 @@ static void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx)
kfree(mc13xxx);
}
-
-static struct spi_driver mc13xxx_spi_driver = {
- .id_table = mc13xxx_device_id,
- .driver = {
- .name = "mc13xxx",
- .owner = THIS_MODULE,
- .of_match_table = mc13xxx_dt_ids,
- },
- .probe = mc13xxx_spi_probe,
- .remove = __devexit_p(mc13xxx_spi_remove),
-};
-
-static int __init mc13xxx_init(void)
-{
- return spi_register_driver(&mc13xxx_spi_driver);
-}
-subsys_initcall(mc13xxx_init);
-
-static void __exit mc13xxx_exit(void)
-{
- spi_unregister_driver(&mc13xxx_spi_driver);
-}
-module_exit(mc13xxx_exit);
+EXPORT_SYMBOL_GPL(mc13xxx_common_cleanup);
MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>");
diff --git a/drivers/mfd/mc13xxx-spi.c b/drivers/mfd/mc13xxx-spi.c
new file mode 100644
index 0000000..3fcdab3
--- /dev/null
+++ b/drivers/mfd/mc13xxx-spi.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2009-2010 Pengutronix
+ * Uwe Kleine-Koenig <u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
+ *
+ * loosely based on an earlier driver that has
+ * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>
+ *
+ * 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.
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/mc13xxx.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/err.h>
+#include <linux/spi/spi.h>
+
+#include "mc13xxx.h"
+
+static const struct spi_device_id mc13xxx_device_id[] = {
+ {
+ .name = "mc13783",
+ .driver_data = MC13XXX_ID_MC13783,
+ }, {
+ .name = "mc13892",
+ .driver_data = MC13XXX_ID_MC13892,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
+
+static const struct of_device_id mc13xxx_dt_ids[] = {
+ { .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
+ { .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
+
+static struct regmap_config mc13xxx_regmap_spi_config = {
+ .reg_bits = 7,
+ .pad_bits = 1,
+ .val_bits = 24,
+
+ .max_register = MC13XXX_NUMREGS,
+
+ .cache_type = REGCACHE_NONE,
+};
+
+static int mc13xxx_spi_probe(struct spi_device *spi)
+{
+ const struct of_device_id *of_id;
+ struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
+ struct mc13xxx *mc13xxx;
+ struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
+ int ret;
+
+ of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
+ if (of_id)
+ sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
+
+ mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
+ if (!mc13xxx)
+ return -ENOMEM;
+
+ dev_set_drvdata(&spi->dev, mc13xxx);
+ spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
+ spi->bits_per_word = 32;
+
+ mc13xxx->dev = &spi->dev;
+ mutex_init(&mc13xxx->lock);
+
+ mc13xxx->regmap = regmap_init_spi(spi, &mc13xxx_regmap_spi_config);
+ if (IS_ERR(mc13xxx->regmap)) {
+ ret = PTR_ERR(mc13xxx->regmap);
+ dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
+ ret);
+ dev_set_drvdata(&spi->dev, NULL);
+ kfree(mc13xxx);
+ return ret;
+ }
+
+ ret = mc13xxx_common_init(mc13xxx, pdata, spi->irq);
+
+ if (ret) {
+ dev_set_drvdata(&spi->dev, NULL);
+ } else {
+ const struct spi_device_id *devid =
+ spi_get_device_id(spi);
+ if (!devid || devid->driver_data != mc13xxx->ictype)
+ dev_warn(mc13xxx->dev,
+ "device id doesn't match auto detection!\n");
+ }
+
+ return ret;
+}
+
+static int __devexit mc13xxx_spi_remove(struct spi_device *spi)
+{
+ struct mc13xxx *mc13xxx = dev_get_drvdata(&spi->dev);
+
+ mc13xxx_common_cleanup(mc13xxx);
+
+ return 0;
+}
+
+static struct spi_driver mc13xxx_spi_driver = {
+ .id_table = mc13xxx_device_id,
+ .driver = {
+ .name = "mc13xxx",
+ .owner = THIS_MODULE,
+ .of_match_table = mc13xxx_dt_ids,
+ },
+ .probe = mc13xxx_spi_probe,
+ .remove = __devexit_p(mc13xxx_spi_remove),
+};
+
+static int __init mc13xxx_init(void)
+{
+ return spi_register_driver(&mc13xxx_spi_driver);
+}
+subsys_initcall(mc13xxx_init);
+
+static void __exit mc13xxx_exit(void)
+{
+ spi_unregister_driver(&mc13xxx_spi_driver);
+}
+module_exit(mc13xxx_exit);
+
+MODULE_DESCRIPTION("Core driver for Freescale MC13XXX PMIC");
+MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/mfd/mc13xxx.h b/drivers/mfd/mc13xxx.h
new file mode 100644
index 0000000..bbba06f
--- /dev/null
+++ b/drivers/mfd/mc13xxx.h
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2012 Creative Product Design
+ * Marc Reilly <marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
+ *
+ * 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.
+ */
+#ifndef __DRIVERS_MFD_MC13XXX_H
+#define __DRIVERS_MFD_MC13XXX_H
+
+#include <linux/mutex.h>
+#include <linux/regmap.h>
+#include <linux/mfd/mc13xxx.h>
+
+enum mc13xxx_id {
+ MC13XXX_ID_MC13783,
+ MC13XXX_ID_MC13892,
+ MC13XXX_ID_INVALID,
+};
+
+#define MC13XXX_NUMREGS 0x3f
+
+struct mc13xxx {
+ struct regmap *regmap;
+
+ struct device *dev;
+ enum mc13xxx_id ictype;
+
+ struct mutex lock;
+ int irq;
+ int flags;
+
+ irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
+ void *irqdata[MC13XXX_NUM_IRQ];
+
+ int adcflags;
+};
+
+int mc13xxx_common_init(struct mc13xxx *mc13xxx,
+ struct mc13xxx_platform_data *pdata, int irq);
+
+void mc13xxx_common_cleanup(struct mc13xxx *mc13xxx);
+
+#endif /* __DRIVERS_MFD_MC13XXX_H */
--
1.7.3.4
------------------------------------------------------------------------------
This SF email is sponsosred by:
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^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH v4 4/4] mfd: mc13xxx: Add i2c driver
[not found] ` <1332129838-7080-1-git-send-email-marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
` (2 preceding siblings ...)
2012-03-19 4:03 ` [PATCH v4 3/4] mfd: mc13xxx-core: Move spi specific code into separate module Marc Reilly
@ 2012-03-19 4:03 ` Marc Reilly
[not found] ` <1332129838-7080-5-git-send-email-marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
3 siblings, 1 reply; 7+ messages in thread
From: Marc Reilly @ 2012-03-19 4:03 UTC (permalink / raw)
To: sameo-VuQAYsv1563Yd54FQh9/CA
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-kernel-u79uwXL29TY76Z2rM5mHXA,
linux-i2c-u79uwXL29TY76Z2rM5mHXA, Marc Reilly,
u.kleine-koenig-bIcnvbaLZ9MEGnE8C9+IrQ,
spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
oskar-fYPSZ7JpQqsAvxtiuMwx3w
Adds support for mc13xxx family ICs connected via i2c.
Signed-off-by: Marc Reilly <marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org>
---
drivers/mfd/Kconfig | 8 +++-
drivers/mfd/Makefile | 1 +
drivers/mfd/mc13xxx-i2c.c | 128 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 136 insertions(+), 1 deletions(-)
create mode 100644 drivers/mfd/mc13xxx-i2c.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 501fee5..3a039ff 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -573,7 +573,7 @@ config MFD_MC13783
config MFD_MC13XXX
tristate "Support Freescale MC13783 and MC13892"
- depends on SPI_MASTER
+ depends on SPI_MASTER || I2C
select MFD_CORE
select MFD_MC13783
help
@@ -590,6 +590,12 @@ config MFD_MC13XXX_SPI
help
Select this if your MC13xxx is connected via an SPI bus.
+config MFD_MC13XXX_I2C
+ tristate "MC13xxx I2C interface" if I2C
+ default I2C
+ help
+ Select this if your MC13xxx is connected via an I2C bus.
+
endif
config ABX500_CORE
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 2dc66ed..6d4566f 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -54,6 +54,7 @@ obj-$(CONFIG_TWL6040_CORE) += twl6040-core.o twl6040-irq.o
obj-$(CONFIG_MFD_MC13XXX) += mc13xxx-core.o
obj-$(CONFIG_MFD_MC13XXX_SPI) += mc13xxx-spi.o
+obj-$(CONFIG_MFD_MC13XXX_I2C) += mc13xxx-i2c.o
obj-$(CONFIG_MFD_CORE) += mfd-core.o
diff --git a/drivers/mfd/mc13xxx-i2c.c b/drivers/mfd/mc13xxx-i2c.c
new file mode 100644
index 0000000..d22501d
--- /dev/null
+++ b/drivers/mfd/mc13xxx-i2c.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2009-2010 Creative Product Design
+ * Marc Reilly marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org
+ *
+ * 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.
+ */
+
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/mc13xxx.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+
+#include "mc13xxx.h"
+
+static const struct i2c_device_id mc13xxx_i2c_device_id[] = {
+ {
+ .name = "mc13892",
+ .driver_data = MC13XXX_ID_MC13892,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(i2c, mc13xxx_i2c_device_id);
+
+static const struct of_device_id mc13xxx_dt_ids[] = {
+ {
+ .compatible = "fsl,mc13892",
+ .data = (void *) &mc13xxx_i2c_device_id[0],
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
+
+static struct regmap_config mc13xxx_regmap_i2c_config = {
+ .reg_bits = 8,
+ .val_bits = 24,
+
+ .max_register = MC13XXX_NUMREGS,
+
+ .cache_type = REGCACHE_NONE,
+};
+
+static int mc13xxx_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ const struct of_device_id *of_id;
+ struct i2c_driver *idrv = to_i2c_driver(client->dev.driver);
+ struct mc13xxx *mc13xxx;
+ struct mc13xxx_platform_data *pdata = dev_get_platdata(&client->dev);
+ int ret;
+
+ of_id = of_match_device(mc13xxx_dt_ids, &client->dev);
+ if (of_id)
+ idrv->id_table = (const struct i2c_device_id*) of_id->data;
+
+ mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
+ if (!mc13xxx)
+ return -ENOMEM;
+
+ dev_set_drvdata(&client->dev, mc13xxx);
+
+ mc13xxx->dev = &client->dev;
+ mutex_init(&mc13xxx->lock);
+
+ mc13xxx->regmap = regmap_init_i2c(client, &mc13xxx_regmap_i2c_config);
+ if (IS_ERR(mc13xxx->regmap)) {
+ ret = PTR_ERR(mc13xxx->regmap);
+ dev_err(mc13xxx->dev, "Failed to initialize register map: %d\n",
+ ret);
+ dev_set_drvdata(&client->dev, NULL);
+ kfree(mc13xxx);
+ return ret;
+ }
+
+ ret = mc13xxx_common_init(mc13xxx, pdata, client->irq);
+
+ if (ret == 0 && (id->driver_data != mc13xxx->ictype))
+ dev_warn(mc13xxx->dev,
+ "device id doesn't match auto detection!\n");
+
+ return ret;
+}
+
+static int __devexit mc13xxx_i2c_remove(struct i2c_client *client)
+{
+ struct mc13xxx *mc13xxx = dev_get_drvdata(&client->dev);
+
+ mc13xxx_common_cleanup(mc13xxx);
+
+ return 0;
+}
+
+static struct i2c_driver mc13xxx_i2c_driver = {
+ .id_table = mc13xxx_i2c_device_id,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "mc13xxx",
+ .of_match_table = mc13xxx_dt_ids,
+ },
+ .probe = mc13xxx_i2c_probe,
+ .remove = __devexit_p(mc13xxx_i2c_remove),
+};
+
+static int __init mc13xxx_i2c_init(void)
+{
+ return i2c_add_driver(&mc13xxx_i2c_driver);
+}
+subsys_initcall(mc13xxx_i2c_init);
+
+static void __exit mc13xxx_i2c_exit(void)
+{
+ i2c_del_driver(&mc13xxx_i2c_driver);
+}
+module_exit(mc13xxx_i2c_exit);
+
+MODULE_DESCRIPTION("i2c driver for Freescale MC13XXX PMIC");
+MODULE_AUTHOR("Marc Reilly <marc-DtE7ei5U7Kg0n/F98K4Iww@public.gmane.org");
+MODULE_LICENSE("GPL v2");
--
1.7.3.4
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