* [PATCH 0/3] Add ST lsm6dso i3c suppport
@ 2019-04-15 19:19 Vitor Soares
2019-04-15 19:19 ` [PATCH 1/3] remap: Add I3C bus support Vitor Soares
` (3 more replies)
0 siblings, 4 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-15 19:19 UTC (permalink / raw)
To: linux-iio, linux-i3c, linux-kernel
Cc: lars, bbrezillon, gregkh, joao.pinto, rafael, Vitor Soares,
broonie, pmeerw, knaack.h, lorenzo.bianconi83, jic23
Vitor Soares (3):
remap: Add i3c bus support
i3c: Add i3c_get_device_id helper
iio: imu: st_lsm6dsx: Add i3c basic support
drivers/base/regmap/Kconfig | 6 ++-
drivers/base/regmap/Makefile | 1 +
drivers/base/regmap/regmap-i3c.c | 62 ++++++++++++++++++++++++++
drivers/i3c/device.c | 8 ++++
drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
include/linux/i3c/device.h | 1 +
include/linux/regmap.h | 20 +++++++++
9 files changed, 172 insertions(+), 2 deletions(-)
create mode 100644 drivers/base/regmap/regmap-i3c.c
create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
--
2.7.4
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* [PATCH 1/3] remap: Add I3C bus support
2019-04-15 19:19 [PATCH 0/3] Add ST lsm6dso i3c suppport Vitor Soares
@ 2019-04-15 19:19 ` Vitor Soares
2019-04-16 6:15 ` Boris Brezillon
[not found] ` <20190416153948.GF4834@sirena.org.uk>
2019-04-15 19:19 ` [PATCH 2/3] i3c: Add i3c_get_device_id helper Vitor Soares
` (2 subsequent siblings)
3 siblings, 2 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-15 19:19 UTC (permalink / raw)
To: linux-iio, linux-i3c, linux-kernel
Cc: lars, bbrezillon, gregkh, joao.pinto, rafael, Vitor Soares,
broonie, pmeerw, knaack.h, lorenzo.bianconi83, jic23
Add basic support for I3C bus.
This is a simple implementation that only give support
for Read and Write commands.
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
---
drivers/base/regmap/Kconfig | 6 +++-
drivers/base/regmap/Makefile | 1 +
drivers/base/regmap/regmap-i3c.c | 62 ++++++++++++++++++++++++++++++++++++++++
include/linux/regmap.h | 20 +++++++++++++
4 files changed, 88 insertions(+), 1 deletion(-)
create mode 100644 drivers/base/regmap/regmap-i3c.c
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 6ad5ef4..c8bbf53 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -4,7 +4,7 @@
# subsystems should select the appropriate symbols.
config REGMAP
- default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ)
+ default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_I3C)
select IRQ_DOMAIN if REGMAP_IRQ
bool
@@ -49,3 +49,7 @@ config REGMAP_SOUNDWIRE
config REGMAP_SCCB
tristate
depends on I2C
+
+config REGMAP_I3C
+ tristate
+ depends on I3C
diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile
index f5b4e88..ff6c7d8 100644
--- a/drivers/base/regmap/Makefile
+++ b/drivers/base/regmap/Makefile
@@ -16,3 +16,4 @@ obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o
obj-$(CONFIG_REGMAP_W1) += regmap-w1.o
obj-$(CONFIG_REGMAP_SOUNDWIRE) += regmap-sdw.o
obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o
+obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o
diff --git a/drivers/base/regmap/regmap-i3c.c b/drivers/base/regmap/regmap-i3c.c
new file mode 100644
index 0000000..565997b
--- /dev/null
+++ b/drivers/base/regmap/regmap-i3c.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ *
+ * Author: Vitor Soares <vitor.soares@synopsys.com>
+ */
+
+#include <linux/regmap.h>
+#include <linux/i3c/device.h>
+#include <linux/i3c/master.h>
+#include <linux/module.h>
+
+static int regmap_i3c_write(void *context, const void *data, size_t count)
+{
+ struct device *dev = context;
+ struct i3c_device *i3c = dev_to_i3cdev(dev);
+ struct i3c_priv_xfer xfers[] = {
+ {
+ .rnw = false,
+ .len = count,
+ .data.out = data,
+ },
+ };
+
+ return i3c_device_do_priv_xfers(i3c, xfers, 1);
+}
+
+static int regmap_i3c_read(void *context,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct device *dev = context;
+ struct i3c_device *i3c = dev_to_i3cdev(dev);
+ struct i3c_priv_xfer xfers[2];
+
+ xfers[0].rnw = false;
+ xfers[0].len = reg_size;
+ xfers[0].data.out = reg;
+
+ xfers[1].rnw = true;
+ xfers[1].len = val_size;
+ xfers[1].data.in = val;
+
+ return i3c_device_do_priv_xfers(i3c, xfers, 2);
+}
+
+static struct regmap_bus regmap_i3c = {
+ .write = regmap_i3c_write,
+ .read = regmap_i3c_read,
+};
+
+struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
+ const struct regmap_config *config,
+ struct lock_class_key *lock_key,
+ const char *lock_name)
+{
+ return __devm_regmap_init(&i3c->dev, ®map_i3c, &i3c->dev, config,
+ lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
+
+MODULE_LICENSE("GPL");
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index daeec7d..f65984d 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -25,6 +25,7 @@ struct module;
struct clk;
struct device;
struct i2c_client;
+struct i3c_device;
struct irq_domain;
struct slim_device;
struct spi_device;
@@ -624,6 +625,10 @@ struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
const struct regmap_config *config,
struct lock_class_key *lock_key,
const char *lock_name);
+struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
+ const struct regmap_config *config,
+ struct lock_class_key *lock_key,
+ const char *lock_name);
/*
* Wrapper for regmap_init macros to include a unique lockdep key and name
* for each call. No-op if CONFIG_LOCKDEP is not set.
@@ -982,6 +987,21 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
#define devm_regmap_init_slimbus(slimbus, config) \
__regmap_lockdep_wrapper(__devm_regmap_init_slimbus, #config, \
slimbus, config)
+
+/**
+ * devm_regmap_init_i3c() - Initialise managed register map
+ *
+ * @i3c: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap. The regmap will be automatically freed by the
+ * device management code.
+ */
+#define devm_regmap_init_i3c(i3c, config) \
+ __regmap_lockdep_wrapper(__devm_regmap_init_i3c, #config, \
+ i3c, config)
+
int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
void regmap_mmio_detach_clk(struct regmap *map);
void regmap_exit(struct regmap *map);
--
2.7.4
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH 2/3] i3c: Add i3c_get_device_id helper
2019-04-15 19:19 [PATCH 0/3] Add ST lsm6dso i3c suppport Vitor Soares
2019-04-15 19:19 ` [PATCH 1/3] remap: Add I3C bus support Vitor Soares
@ 2019-04-15 19:19 ` Vitor Soares
2019-04-16 6:18 ` Boris Brezillon
2019-04-15 19:19 ` [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support Vitor Soares
2019-04-16 6:32 ` [PATCH 0/3] Add ST lsm6dso i3c suppport Boris Brezillon
3 siblings, 1 reply; 19+ messages in thread
From: Vitor Soares @ 2019-04-15 19:19 UTC (permalink / raw)
To: linux-iio, linux-i3c, linux-kernel
Cc: lars, bbrezillon, gregkh, joao.pinto, rafael, Vitor Soares,
broonie, pmeerw, knaack.h, lorenzo.bianconi83, jic23
This helper return the i3c_device_id structure in order the client
have access to the driver data.
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
---
drivers/i3c/device.c | 8 ++++++++
include/linux/i3c/device.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
index 472be99..8ab8e4c 100644
--- a/drivers/i3c/device.c
+++ b/drivers/i3c/device.c
@@ -235,6 +235,14 @@ struct i3c_device *dev_to_i3cdev(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_to_i3cdev);
+const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev)
+{
+ const struct i3c_driver *i3cdrv = drv_to_i3cdrv(i3cdev->dev.driver);
+
+ return i3cdrv->id_table;
+}
+EXPORT_SYMBOL_GPL(i3c_get_device_id);
+
/**
* i3c_driver_register_with_owner() - register an I3C device driver
*
diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h
index 7ee7e30..ee48886 100644
--- a/include/linux/i3c/device.h
+++ b/include/linux/i3c/device.h
@@ -211,6 +211,7 @@ static inline struct i3c_driver *drv_to_i3cdrv(struct device_driver *drv)
struct device *i3cdev_to_dev(struct i3c_device *i3cdev);
struct i3c_device *dev_to_i3cdev(struct device *dev);
+const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev);
static inline void i3cdev_set_drvdata(struct i3c_device *i3cdev,
void *data)
--
2.7.4
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply related [flat|nested] 19+ messages in thread
* [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-15 19:19 [PATCH 0/3] Add ST lsm6dso i3c suppport Vitor Soares
2019-04-15 19:19 ` [PATCH 1/3] remap: Add I3C bus support Vitor Soares
2019-04-15 19:19 ` [PATCH 2/3] i3c: Add i3c_get_device_id helper Vitor Soares
@ 2019-04-15 19:19 ` Vitor Soares
2019-04-15 22:17 ` Lorenzo Bianconi
2019-04-16 6:25 ` Boris Brezillon
2019-04-16 6:32 ` [PATCH 0/3] Add ST lsm6dso i3c suppport Boris Brezillon
3 siblings, 2 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-15 19:19 UTC (permalink / raw)
To: linux-iio, linux-i3c, linux-kernel
Cc: lars, bbrezillon, gregkh, joao.pinto, rafael, Vitor Soares,
broonie, pmeerw, knaack.h, lorenzo.bianconi83, jic23
For today the st_lsm6dsx driver support lsm6dso sensor only in
spi and i2c mode.
The lsm6dso is also i3c capable so lets give i3c support to it.
Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
---
drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
3 files changed, 75 insertions(+), 1 deletion(-)
create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
index 094fd00..1ab9bbf 100644
--- a/drivers/iio/imu/st_lsm6dsx/Kconfig
+++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
@@ -1,11 +1,12 @@
config IIO_ST_LSM6DSX
tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
- depends on (I2C || SPI)
+ depends on (I2C || SPI || I3C)
select IIO_BUFFER
select IIO_KFIFO_BUF
select IIO_ST_LSM6DSX_I2C if (I2C)
select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
+ select IIO_ST_LSM6DSX_I3C if (I3C)
help
Say yes here to build support for STMicroelectronics LSM6DSx imu
sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
@@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
tristate
depends on IIO_ST_LSM6DSX
select REGMAP_SPI
+
+config IIO_ST_LSM6DSX_I3C
+ tristate
+ depends on IIO_ST_LSM6DSX
+ select REGMAP_I3C
diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
index e5f733c..c676965 100644
--- a/drivers/iio/imu/st_lsm6dsx/Makefile
+++ b/drivers/iio/imu/st_lsm6dsx/Makefile
@@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
+obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
new file mode 100644
index 0000000..2df5e70
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
@@ -0,0 +1,67 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ *
+ * Author: Vitor Soares <vitor.soares@synopsys.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i3c/device.h>
+#include <linux/i3c/master.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+#include "st_lsm6dsx.h"
+
+#define NAME_SIZE 32
+
+struct st_lsm6dsx_i3c_data {
+ char name[NAME_SIZE];
+ enum st_lsm6dsx_hw_id id;
+};
+
+static const struct st_lsm6dsx_i3c_data hw_data[] = {
+ { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
+};
+
+static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
+{
+ const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
+ const struct st_lsm6dsx_i3c_data *hw_data = id->data;
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
+ (int)PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+
+ return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
+ hw_data->name, regmap);
+}
+
+
+static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
+ I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
+
+static struct i3c_driver st_lsm6dsx_driver = {
+ .driver.name = "st_lsm6dsx_i3c",
+ .probe = st_lsm6dsx_i3c_probe,
+ .id_table = st_lsm6dsx_i3c_ids,
+};
+module_i3c_driver(st_lsm6dsx_driver);
+
+MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
+MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
+MODULE_LICENSE("GPL v2");
+
--
2.7.4
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply related [flat|nested] 19+ messages in thread
* Re: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-15 19:19 ` [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support Vitor Soares
@ 2019-04-15 22:17 ` Lorenzo Bianconi
2019-04-16 13:53 ` Vitor Soares
2019-04-16 6:25 ` Boris Brezillon
1 sibling, 1 reply; 19+ messages in thread
From: Lorenzo Bianconi @ 2019-04-15 22:17 UTC (permalink / raw)
To: Vitor Soares
Cc: Lars-Peter Clausen, bbrezillon, linux-iio, gregkh, joao.pinto,
rafael, broonie, Peter Meerwald-Stadler, Hartmut Knaack,
linux-i3c, Jonathan Cameron
>
> For today the st_lsm6dsx driver support lsm6dso sensor only in
> spi and i2c mode.
>
> The lsm6dso is also i3c capable so lets give i3c support to it.
>
Hi Vitor,
thx, this is very cool :)
Just a couple of nit inline
Regards,
Lorenzo
> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> ---
> drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> 3 files changed, 75 insertions(+), 1 deletion(-)
> create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
>
> diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
> index 094fd00..1ab9bbf 100644
> --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> @@ -1,11 +1,12 @@
>
> config IIO_ST_LSM6DSX
> tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> - depends on (I2C || SPI)
> + depends on (I2C || SPI || I3C)
> select IIO_BUFFER
> select IIO_KFIFO_BUF
> select IIO_ST_LSM6DSX_I2C if (I2C)
> select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> + select IIO_ST_LSM6DSX_I3C if (I3C)
> help
> Say yes here to build support for STMicroelectronics LSM6DSx imu
> sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> tristate
> depends on IIO_ST_LSM6DSX
> select REGMAP_SPI
> +
> +config IIO_ST_LSM6DSX_I3C
> + tristate
> + depends on IIO_ST_LSM6DSX
> + select REGMAP_I3C
> diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
> index e5f733c..c676965 100644
> --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> @@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
> obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
> obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
> obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
> +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> new file mode 100644
> index 0000000..2df5e70
> --- /dev/null
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> @@ -0,0 +1,67 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> + *
> + * Author: Vitor Soares <vitor.soares@synopsys.com>
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/i3c/device.h>
> +#include <linux/i3c/master.h>
> +#include <linux/slab.h>
> +#include <linux/of.h>
> +#include <linux/regmap.h>
> +
> +#include "st_lsm6dsx.h"
> +
> +#define NAME_SIZE 32
> +
> +struct st_lsm6dsx_i3c_data {
> + char name[NAME_SIZE];
> + enum st_lsm6dsx_hw_id id;
> +};
> +
> +static const struct st_lsm6dsx_i3c_data hw_data[] = {
> + { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
> +};
> +
> +static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> +};
> +
> +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> +{
> + const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
> + const struct st_lsm6dsx_i3c_data *hw_data = id->data;
> + struct regmap *regmap;
> +
> + regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
> + if (IS_ERR(regmap)) {
> + dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> + (int)PTR_ERR(regmap));
> + return PTR_ERR(regmap);
> + }
> +
> + return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
> + hw_data->name, regmap);
In order to support the hw FIFO, I guess you are planning to support
interrupts/IBI here
> +}
> +
please remove 'new line' here
> +
> +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
> + I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> +
> +static struct i3c_driver st_lsm6dsx_driver = {
> + .driver.name = "st_lsm6dsx_i3c",
> + .probe = st_lsm6dsx_i3c_probe,
> + .id_table = st_lsm6dsx_i3c_ids,
> +};
> +module_i3c_driver(st_lsm6dsx_driver);
> +
> +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> +MODULE_LICENSE("GPL v2");
> +
> --
> 2.7.4
>
--
UNIX is Sexy: who | grep -i blonde | talk; cd ~; wine; talk; touch;
unzip; touch; strip; gasp; finger; gasp; mount; fsck; more; yes; gasp;
umount; make clean; sleep
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 1/3] remap: Add I3C bus support
2019-04-15 19:19 ` [PATCH 1/3] remap: Add I3C bus support Vitor Soares
@ 2019-04-16 6:15 ` Boris Brezillon
2019-04-16 14:41 ` Vitor Soares
[not found] ` <20190416153948.GF4834@sirena.org.uk>
1 sibling, 1 reply; 19+ messages in thread
From: Boris Brezillon @ 2019-04-16 6:15 UTC (permalink / raw)
To: Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
Typo in the subject: s/remap/regmap/
On Mon, 15 Apr 2019 21:19:39 +0200
Vitor Soares <vitor.soares@synopsys.com> wrote:
> Add basic support for I3C bus.
> This is a simple implementation that only give support
> for Read and Write commands.
>
> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> ---
> drivers/base/regmap/Kconfig | 6 +++-
> drivers/base/regmap/Makefile | 1 +
> drivers/base/regmap/regmap-i3c.c | 62 ++++++++++++++++++++++++++++++++++++++++
> include/linux/regmap.h | 20 +++++++++++++
> 4 files changed, 88 insertions(+), 1 deletion(-)
> create mode 100644 drivers/base/regmap/regmap-i3c.c
>
> diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
> index 6ad5ef4..c8bbf53 100644
> --- a/drivers/base/regmap/Kconfig
> +++ b/drivers/base/regmap/Kconfig
> @@ -4,7 +4,7 @@
> # subsystems should select the appropriate symbols.
>
> config REGMAP
> - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ)
> + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_I3C)
> select IRQ_DOMAIN if REGMAP_IRQ
> bool
>
> @@ -49,3 +49,7 @@ config REGMAP_SOUNDWIRE
> config REGMAP_SCCB
> tristate
> depends on I2C
> +
> +config REGMAP_I3C
> + tristate
> + depends on I3C
> diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile
> index f5b4e88..ff6c7d8 100644
> --- a/drivers/base/regmap/Makefile
> +++ b/drivers/base/regmap/Makefile
> @@ -16,3 +16,4 @@ obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o
> obj-$(CONFIG_REGMAP_W1) += regmap-w1.o
> obj-$(CONFIG_REGMAP_SOUNDWIRE) += regmap-sdw.o
> obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o
> +obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o
> diff --git a/drivers/base/regmap/regmap-i3c.c b/drivers/base/regmap/regmap-i3c.c
> new file mode 100644
> index 0000000..565997b
> --- /dev/null
> +++ b/drivers/base/regmap/regmap-i3c.c
> @@ -0,0 +1,62 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> + *
> + * Author: Vitor Soares <vitor.soares@synopsys.com>
> + */
> +
> +#include <linux/regmap.h>
> +#include <linux/i3c/device.h>
> +#include <linux/i3c/master.h>
> +#include <linux/module.h>
> +
> +static int regmap_i3c_write(void *context, const void *data, size_t count)
> +{
> + struct device *dev = context;
> + struct i3c_device *i3c = dev_to_i3cdev(dev);
> + struct i3c_priv_xfer xfers[] = {
> + {
> + .rnw = false,
> + .len = count,
> + .data.out = data,
> + },
> + };
> +
> + return i3c_device_do_priv_xfers(i3c, xfers, 1);
> +}
> +
> +static int regmap_i3c_read(void *context,
> + const void *reg, size_t reg_size,
> + void *val, size_t val_size)
> +{
> + struct device *dev = context;
> + struct i3c_device *i3c = dev_to_i3cdev(dev);
> + struct i3c_priv_xfer xfers[2];
> +
> + xfers[0].rnw = false;
> + xfers[0].len = reg_size;
> + xfers[0].data.out = reg;
> +
> + xfers[1].rnw = true;
> + xfers[1].len = val_size;
> + xfers[1].data.in = val;
> +
> + return i3c_device_do_priv_xfers(i3c, xfers, 2);
> +}
> +
> +static struct regmap_bus regmap_i3c = {
> + .write = regmap_i3c_write,
> + .read = regmap_i3c_read,
> +};
> +
> +struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
> + const struct regmap_config *config,
> + struct lock_class_key *lock_key,
> + const char *lock_name)
> +{
> + return __devm_regmap_init(&i3c->dev, ®map_i3c, &i3c->dev, config,
> + lock_key, lock_name);
> +}
> +EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
> +
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/regmap.h b/include/linux/regmap.h
> index daeec7d..f65984d 100644
> --- a/include/linux/regmap.h
> +++ b/include/linux/regmap.h
> @@ -25,6 +25,7 @@ struct module;
> struct clk;
> struct device;
> struct i2c_client;
> +struct i3c_device;
> struct irq_domain;
> struct slim_device;
> struct spi_device;
> @@ -624,6 +625,10 @@ struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
> const struct regmap_config *config,
> struct lock_class_key *lock_key,
> const char *lock_name);
> +struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
> + const struct regmap_config *config,
> + struct lock_class_key *lock_key,
> + const char *lock_name);
> /*
> * Wrapper for regmap_init macros to include a unique lockdep key and name
> * for each call. No-op if CONFIG_LOCKDEP is not set.
> @@ -982,6 +987,21 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
> #define devm_regmap_init_slimbus(slimbus, config) \
> __regmap_lockdep_wrapper(__devm_regmap_init_slimbus, #config, \
> slimbus, config)
> +
> +/**
> + * devm_regmap_init_i3c() - Initialise managed register map
Maybe we should have a more specific name here, as some might want to
access registers using HDR modes (devm_regmap_init_i3c_sdr()?)
> + *
> + * @i3c: Device that will be interacted with
> + * @config: Configuration for register map
> + *
> + * The return value will be an ERR_PTR() on error or a valid pointer
> + * to a struct regmap. The regmap will be automatically freed by the
> + * device management code.
> + */
> +#define devm_regmap_init_i3c(i3c, config) \
> + __regmap_lockdep_wrapper(__devm_regmap_init_i3c, #config, \
> + i3c, config)
> +
> int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
> void regmap_mmio_detach_clk(struct regmap *map);
> void regmap_exit(struct regmap *map);
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 2/3] i3c: Add i3c_get_device_id helper
2019-04-15 19:19 ` [PATCH 2/3] i3c: Add i3c_get_device_id helper Vitor Soares
@ 2019-04-16 6:18 ` Boris Brezillon
2019-04-16 14:48 ` Vitor Soares
0 siblings, 1 reply; 19+ messages in thread
From: Boris Brezillon @ 2019-04-16 6:18 UTC (permalink / raw)
To: Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
On Mon, 15 Apr 2019 21:19:40 +0200
Vitor Soares <vitor.soares@synopsys.com> wrote:
> This helper return the i3c_device_id structure in order the client
> have access to the driver data.
>
> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> ---
> drivers/i3c/device.c | 8 ++++++++
> include/linux/i3c/device.h | 1 +
> 2 files changed, 9 insertions(+)
>
> diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
> index 472be99..8ab8e4c 100644
> --- a/drivers/i3c/device.c
> +++ b/drivers/i3c/device.c
> @@ -235,6 +235,14 @@ struct i3c_device *dev_to_i3cdev(struct device *dev)
> }
> EXPORT_SYMBOL_GPL(dev_to_i3cdev);
>
> +const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev)
> +{
> + const struct i3c_driver *i3cdrv = drv_to_i3cdrv(i3cdev->dev.driver);
> +
> + return i3cdrv->id_table;
> +}
> +EXPORT_SYMBOL_GPL(i3c_get_device_id);
I think what you want is i3c_device_match_id(). Just move the function
to drivers/i3c/device.c, export it and define its prototype in
include/i3c/device.h.
> +
> /**
> * i3c_driver_register_with_owner() - register an I3C device driver
> *
> diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h
> index 7ee7e30..ee48886 100644
> --- a/include/linux/i3c/device.h
> +++ b/include/linux/i3c/device.h
> @@ -211,6 +211,7 @@ static inline struct i3c_driver *drv_to_i3cdrv(struct device_driver *drv)
>
> struct device *i3cdev_to_dev(struct i3c_device *i3cdev);
> struct i3c_device *dev_to_i3cdev(struct device *dev);
> +const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev);
>
> static inline void i3cdev_set_drvdata(struct i3c_device *i3cdev,
> void *data)
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-15 19:19 ` [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support Vitor Soares
2019-04-15 22:17 ` Lorenzo Bianconi
@ 2019-04-16 6:25 ` Boris Brezillon
2019-04-16 7:58 ` Lorenzo Bianconi
2019-04-16 15:02 ` Vitor Soares
1 sibling, 2 replies; 19+ messages in thread
From: Boris Brezillon @ 2019-04-16 6:25 UTC (permalink / raw)
To: Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
On Mon, 15 Apr 2019 21:19:41 +0200
Vitor Soares <vitor.soares@synopsys.com> wrote:
> For today the st_lsm6dsx driver support lsm6dso sensor only in
> spi and i2c mode.
>
> The lsm6dso is also i3c capable so lets give i3c support to it.
>
> Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> ---
> drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> 3 files changed, 75 insertions(+), 1 deletion(-)
> create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
>
> diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
> index 094fd00..1ab9bbf 100644
> --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> @@ -1,11 +1,12 @@
>
> config IIO_ST_LSM6DSX
> tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> - depends on (I2C || SPI)
> + depends on (I2C || SPI || I3C)
> select IIO_BUFFER
> select IIO_KFIFO_BUF
> select IIO_ST_LSM6DSX_I2C if (I2C)
> select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> + select IIO_ST_LSM6DSX_I3C if (I3C)
> help
> Say yes here to build support for STMicroelectronics LSM6DSx imu
> sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> tristate
> depends on IIO_ST_LSM6DSX
> select REGMAP_SPI
> +
> +config IIO_ST_LSM6DSX_I3C
> + tristate
> + depends on IIO_ST_LSM6DSX
> + select REGMAP_I3C
> diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
> index e5f733c..c676965 100644
> --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> @@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
> obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
> obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
> obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
> +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> new file mode 100644
> index 0000000..2df5e70
> --- /dev/null
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> @@ -0,0 +1,67 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> + *
> + * Author: Vitor Soares <vitor.soares@synopsys.com>
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/i3c/device.h>
> +#include <linux/i3c/master.h>
> +#include <linux/slab.h>
> +#include <linux/of.h>
> +#include <linux/regmap.h>
> +
> +#include "st_lsm6dsx.h"
> +
> +#define NAME_SIZE 32
> +
> +struct st_lsm6dsx_i3c_data {
> + char name[NAME_SIZE];
const char *name;
> + enum st_lsm6dsx_hw_id id;
> +};
> +
> +static const struct st_lsm6dsx_i3c_data hw_data[] = {
No need to make it an array, and it should probably be named
st_lsm6dso_data not hw_data.
> + { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
> +};
> +
> +static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> +};
> +
> +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> +{
> + const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
i3c_device_match_id(i3cdev,
st_lsm6dsx_i3c_ids);
> + const struct st_lsm6dsx_i3c_data *hw_data = id->data;
> + struct regmap *regmap;
> +
> + regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
> + if (IS_ERR(regmap)) {
> + dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> + (int)PTR_ERR(regmap));
> + return PTR_ERR(regmap);
> + }
> +
> + return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
> + hw_data->name, regmap);
> +}
> +
> +
> +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
> + I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> +
> +static struct i3c_driver st_lsm6dsx_driver = {
> + .driver.name = "st_lsm6dsx_i3c",
> + .probe = st_lsm6dsx_i3c_probe,
> + .id_table = st_lsm6dsx_i3c_ids,
You should probably set the pm_ops here (st_lsm6dsx_pm_ops).
> +};
> +module_i3c_driver(st_lsm6dsx_driver);
> +
> +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> +MODULE_LICENSE("GPL v2");
> +
You can remove this blank line.
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 0/3] Add ST lsm6dso i3c suppport
2019-04-15 19:19 [PATCH 0/3] Add ST lsm6dso i3c suppport Vitor Soares
` (2 preceding siblings ...)
2019-04-15 19:19 ` [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support Vitor Soares
@ 2019-04-16 6:32 ` Boris Brezillon
3 siblings, 0 replies; 19+ messages in thread
From: Boris Brezillon @ 2019-04-16 6:32 UTC (permalink / raw)
To: Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
Hi Vitor,
On Mon, 15 Apr 2019 21:19:38 +0200
Vitor Soares <vitor.soares@synopsys.com> wrote:
I like the very detailed description in your cover letter :P.
Anyway, glad to see I3C support added to regmap. Also happy to have a
new driver for an I3C device.
Thanks for working on that.
Boris
> Vitor Soares (3):
> remap: Add i3c bus support
> i3c: Add i3c_get_device_id helper
> iio: imu: st_lsm6dsx: Add i3c basic support
>
> drivers/base/regmap/Kconfig | 6 ++-
> drivers/base/regmap/Makefile | 1 +
> drivers/base/regmap/regmap-i3c.c | 62 ++++++++++++++++++++++++++
> drivers/i3c/device.c | 8 ++++
> drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> include/linux/i3c/device.h | 1 +
> include/linux/regmap.h | 20 +++++++++
> 9 files changed, 172 insertions(+), 2 deletions(-)
> create mode 100644 drivers/base/regmap/regmap-i3c.c
> create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
>
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-16 6:25 ` Boris Brezillon
@ 2019-04-16 7:58 ` Lorenzo Bianconi
2019-04-16 8:05 ` Boris Brezillon
2019-04-16 15:02 ` Vitor Soares
1 sibling, 1 reply; 19+ messages in thread
From: Lorenzo Bianconi @ 2019-04-16 7:58 UTC (permalink / raw)
To: Boris Brezillon
Cc: Lars-Peter Clausen, bbrezillon, linux-iio, gregkh, joao.pinto,
rafael, Linux Kernel Mailing List, Vitor Soares, broonie,
Peter Meerwald-Stadler, Hartmut Knaack, linux-i3c,
Jonathan Cameron
>
> On Mon, 15 Apr 2019 21:19:41 +0200
> Vitor Soares <vitor.soares@synopsys.com> wrote:
>
> > For today the st_lsm6dsx driver support lsm6dso sensor only in
> > spi and i2c mode.
> >
> > The lsm6dso is also i3c capable so lets give i3c support to it.
> >
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > ---
> > drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> > drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> > drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> > 3 files changed, 75 insertions(+), 1 deletion(-)
> > create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> >
> > diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > index 094fd00..1ab9bbf 100644
> > --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> > +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > @@ -1,11 +1,12 @@
> >
> > config IIO_ST_LSM6DSX
> > tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> > - depends on (I2C || SPI)
> > + depends on (I2C || SPI || I3C)
> > select IIO_BUFFER
> > select IIO_KFIFO_BUF
> > select IIO_ST_LSM6DSX_I2C if (I2C)
> > select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> > + select IIO_ST_LSM6DSX_I3C if (I3C)
> > help
> > Say yes here to build support for STMicroelectronics LSM6DSx imu
> > sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> > @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> > tristate
> > depends on IIO_ST_LSM6DSX
> > select REGMAP_SPI
> > +
> > +config IIO_ST_LSM6DSX_I3C
> > + tristate
> > + depends on IIO_ST_LSM6DSX
> > + select REGMAP_I3C
> > diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
> > index e5f733c..c676965 100644
> > --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> > +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> > @@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
> > obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
> > obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
> > obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
> > +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
> > diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > new file mode 100644
> > index 0000000..2df5e70
> > --- /dev/null
> > +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > @@ -0,0 +1,67 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > + *
> > + * Author: Vitor Soares <vitor.soares@synopsys.com>
> > + */
> > +
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/i3c/device.h>
> > +#include <linux/i3c/master.h>
> > +#include <linux/slab.h>
> > +#include <linux/of.h>
> > +#include <linux/regmap.h>
> > +
> > +#include "st_lsm6dsx.h"
> > +
> > +#define NAME_SIZE 32
> > +
> > +struct st_lsm6dsx_i3c_data {
> > + char name[NAME_SIZE];
>
> const char *name;
>
> > + enum st_lsm6dsx_hw_id id;
> > +};
> > +
> > +static const struct st_lsm6dsx_i3c_data hw_data[] = {
>
> No need to make it an array, and it should probably be named
> st_lsm6dso_data not hw_data.
I guess it will be used even for future devices so I would prefer to
make it an array with a 'general' name
Regards,
Lorenzo
>
> > + { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
> > +};
> > +
> > +static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
> > + .reg_bits = 8,
> > + .val_bits = 8,
> > +};
> > +
> > +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> > +{
> > + const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
>
> i3c_device_match_id(i3cdev,
> st_lsm6dsx_i3c_ids);
>
> > + const struct st_lsm6dsx_i3c_data *hw_data = id->data;
> > + struct regmap *regmap;
> > +
> > + regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
> > + if (IS_ERR(regmap)) {
> > + dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> > + (int)PTR_ERR(regmap));
> > + return PTR_ERR(regmap);
> > + }
> > +
> > + return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
> > + hw_data->name, regmap);
> > +}
> > +
> > +
> > +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
> > + I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
> > + { /* sentinel */ },
> > +};
> > +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> > +
> > +static struct i3c_driver st_lsm6dsx_driver = {
> > + .driver.name = "st_lsm6dsx_i3c",
> > + .probe = st_lsm6dsx_i3c_probe,
> > + .id_table = st_lsm6dsx_i3c_ids,
>
> You should probably set the pm_ops here (st_lsm6dsx_pm_ops).
>
> > +};
> > +module_i3c_driver(st_lsm6dsx_driver);
> > +
> > +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> > +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> > +MODULE_LICENSE("GPL v2");
> > +
>
> You can remove this blank line.
>
--
UNIX is Sexy: who | grep -i blonde | talk; cd ~; wine; talk; touch;
unzip; touch; strip; gasp; finger; gasp; mount; fsck; more; yes; gasp;
umount; make clean; sleep
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-16 7:58 ` Lorenzo Bianconi
@ 2019-04-16 8:05 ` Boris Brezillon
2019-04-16 15:00 ` Vitor Soares
0 siblings, 1 reply; 19+ messages in thread
From: Boris Brezillon @ 2019-04-16 8:05 UTC (permalink / raw)
To: Lorenzo Bianconi
Cc: Lars-Peter Clausen, bbrezillon, linux-iio, gregkh, joao.pinto,
rafael, Linux Kernel Mailing List, Vitor Soares, broonie,
Peter Meerwald-Stadler, Hartmut Knaack, linux-i3c,
Jonathan Cameron
On Tue, 16 Apr 2019 09:58:33 +0200
Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> wrote:
> >
> > On Mon, 15 Apr 2019 21:19:41 +0200
> > Vitor Soares <vitor.soares@synopsys.com> wrote:
> >
> > > For today the st_lsm6dsx driver support lsm6dso sensor only in
> > > spi and i2c mode.
> > >
> > > The lsm6dso is also i3c capable so lets give i3c support to it.
> > >
> > > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > > ---
> > > drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> > > drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> > > drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> > > 3 files changed, 75 insertions(+), 1 deletion(-)
> > > create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > >
> > > diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > > index 094fd00..1ab9bbf 100644
> > > --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> > > +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > > @@ -1,11 +1,12 @@
> > >
> > > config IIO_ST_LSM6DSX
> > > tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> > > - depends on (I2C || SPI)
> > > + depends on (I2C || SPI || I3C)
> > > select IIO_BUFFER
> > > select IIO_KFIFO_BUF
> > > select IIO_ST_LSM6DSX_I2C if (I2C)
> > > select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> > > + select IIO_ST_LSM6DSX_I3C if (I3C)
> > > help
> > > Say yes here to build support for STMicroelectronics LSM6DSx imu
> > > sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> > > @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> > > tristate
> > > depends on IIO_ST_LSM6DSX
> > > select REGMAP_SPI
> > > +
> > > +config IIO_ST_LSM6DSX_I3C
> > > + tristate
> > > + depends on IIO_ST_LSM6DSX
> > > + select REGMAP_I3C
> > > diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
> > > index e5f733c..c676965 100644
> > > --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> > > +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> > > @@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
> > > obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
> > > obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
> > > obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
> > > +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
> > > diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > > new file mode 100644
> > > index 0000000..2df5e70
> > > --- /dev/null
> > > +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > > @@ -0,0 +1,67 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > > + *
> > > + * Author: Vitor Soares <vitor.soares@synopsys.com>
> > > + */
> > > +
> > > +#include <linux/kernel.h>
> > > +#include <linux/module.h>
> > > +#include <linux/i3c/device.h>
> > > +#include <linux/i3c/master.h>
> > > +#include <linux/slab.h>
> > > +#include <linux/of.h>
> > > +#include <linux/regmap.h>
> > > +
> > > +#include "st_lsm6dsx.h"
> > > +
> > > +#define NAME_SIZE 32
> > > +
> > > +struct st_lsm6dsx_i3c_data {
> > > + char name[NAME_SIZE];
> >
> > const char *name;
> >
> > > + enum st_lsm6dsx_hw_id id;
> > > +};
> > > +
> > > +static const struct st_lsm6dsx_i3c_data hw_data[] = {
> >
> > No need to make it an array, and it should probably be named
> > st_lsm6dso_data not hw_data.
>
> I guess it will be used even for future devices so I would prefer to
> make it an array with a 'general' name
I find it more error-prone to reference an array with an opaque index
number than reference an instance with a name that clearly reflects
what HW it describes (see the I3C_DEVICE() entry at the end of the
driver), but okay.
>
> Regards,
> Lorenzo
>
> >
> > > + { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
> > > +};
> > > +
> > > +static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
> > > + .reg_bits = 8,
> > > + .val_bits = 8,
> > > +};
> > > +
> > > +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> > > +{
> > > + const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
> >
> > i3c_device_match_id(i3cdev,
> > st_lsm6dsx_i3c_ids);
> >
> > > + const struct st_lsm6dsx_i3c_data *hw_data = id->data;
> > > + struct regmap *regmap;
> > > +
> > > + regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
> > > + if (IS_ERR(regmap)) {
> > > + dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> > > + (int)PTR_ERR(regmap));
> > > + return PTR_ERR(regmap);
> > > + }
> > > +
> > > + return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
> > > + hw_data->name, regmap);
> > > +}
> > > +
> > > +
> > > +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
> > > + I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
> > > + { /* sentinel */ },
> > > +};
> > > +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> > > +
> > > +static struct i3c_driver st_lsm6dsx_driver = {
> > > + .driver.name = "st_lsm6dsx_i3c",
> > > + .probe = st_lsm6dsx_i3c_probe,
> > > + .id_table = st_lsm6dsx_i3c_ids,
> >
> > You should probably set the pm_ops here (st_lsm6dsx_pm_ops).
> >
> > > +};
> > > +module_i3c_driver(st_lsm6dsx_driver);
> > > +
> > > +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> > > +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> > > +MODULE_LICENSE("GPL v2");
> > > +
> >
> > You can remove this blank line.
> >
>
>
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-15 22:17 ` Lorenzo Bianconi
@ 2019-04-16 13:53 ` Vitor Soares
0 siblings, 0 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-16 13:53 UTC (permalink / raw)
To: Lorenzo Bianconi, Vitor Soares
Cc: Lars-Peter Clausen, bbrezillon, linux-iio, gregkh, joao.pinto,
rafael, broonie, Peter Meerwald-Stadler, Hartmut Knaack,
linux-i3c, Jonathan Cameron
HI Lorenzo,
From: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Date: Mon, Apr 15, 2019 at 23:17:50
> >
> > For today the st_lsm6dsx driver support lsm6dso sensor only in
> > spi and i2c mode.
> >
> > The lsm6dso is also i3c capable so lets give i3c support to it.
> >
>
> Hi Vitor,
>
> thx, this is very cool :)
> Just a couple of nit inline
>
> Regards,
> Lorenzo
>
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > ---
> > drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> > drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> > drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> > 3 files changed, 75 insertions(+), 1 deletion(-)
> > create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> >
> > diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > index 094fd00..1ab9bbf 100644
> > --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> > +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > @@ -1,11 +1,12 @@
> >
> > config IIO_ST_LSM6DSX
> > tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> > - depends on (I2C || SPI)
> > + depends on (I2C || SPI || I3C)
> > select IIO_BUFFER
> > select IIO_KFIFO_BUF
> > select IIO_ST_LSM6DSX_I2C if (I2C)
> > select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> > + select IIO_ST_LSM6DSX_I3C if (I3C)
> > help
> > Say yes here to build support for STMicroelectronics LSM6DSx imu
> > sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> > @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> > tristate
> > depends on IIO_ST_LSM6DSX
> > select REGMAP_SPI
> > +
> > +config IIO_ST_LSM6DSX_I3C
> > + tristate
> > + depends on IIO_ST_LSM6DSX
> > + select REGMAP_I3C
> > diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
> > index e5f733c..c676965 100644
> > --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> > +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> > @@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
> > obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
> > obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
> > obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
> > +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
> > diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > new file mode 100644
> > index 0000000..2df5e70
> > --- /dev/null
> > +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > @@ -0,0 +1,67 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > + *
> > + * Author: Vitor Soares <vitor.soares@synopsys.com>
> > + */
> > +
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/i3c/device.h>
> > +#include <linux/i3c/master.h>
> > +#include <linux/slab.h>
> > +#include <linux/of.h>
> > +#include <linux/regmap.h>
> > +
> > +#include "st_lsm6dsx.h"
> > +
> > +#define NAME_SIZE 32
> > +
> > +struct st_lsm6dsx_i3c_data {
> > + char name[NAME_SIZE];
> > + enum st_lsm6dsx_hw_id id;
> > +};
> > +
> > +static const struct st_lsm6dsx_i3c_data hw_data[] = {
> > + { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
> > +};
> > +
> > +static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
> > + .reg_bits = 8,
> > + .val_bits = 8,
> > +};
> > +
> > +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> > +{
> > + const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
> > + const struct st_lsm6dsx_i3c_data *hw_data = id->data;
> > + struct regmap *regmap;
> > +
> > + regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
> > + if (IS_ERR(regmap)) {
> > + dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> > + (int)PTR_ERR(regmap));
> > + return PTR_ERR(regmap);
> > + }
> > +
> > + return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
> > + hw_data->name, regmap);
>
> In order to support the hw FIFO, I guess you are planning to support
> interrupts/IBI here
My idea is to register the ibi and handler in this file.
The handler would call a buffer function passing the device and payload.
On st_lsm6dsx_probe we can add a flag for IBI configuration on the sensor
side.
>
> > +}
> > +
>
> please remove 'new line' here
Sure.
>
> > +
> > +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
> > + I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
> > + { /* sentinel */ },
> > +};
> > +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> > +
> > +static struct i3c_driver st_lsm6dsx_driver = {
> > + .driver.name = "st_lsm6dsx_i3c",
> > + .probe = st_lsm6dsx_i3c_probe,
> > + .id_table = st_lsm6dsx_i3c_ids,
> > +};
> > +module_i3c_driver(st_lsm6dsx_driver);
> > +
> > +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> > +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> > +MODULE_LICENSE("GPL v2");
> > +
> > --
> > 2.7.4
> >
>
>
> --
> UNIX is Sexy: who | grep -i blonde | talk; cd ~; wine; talk; touch;
> unzip; touch; strip; gasp; finger; gasp; mount; fsck; more; yes; gasp;
> umount; make clean; sleep
Thanks for your feedback.
Best regards,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 1/3] remap: Add I3C bus support
2019-04-16 6:15 ` Boris Brezillon
@ 2019-04-16 14:41 ` Vitor Soares
0 siblings, 0 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-16 14:41 UTC (permalink / raw)
To: Boris Brezillon, Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
Hi Boris,
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, Apr 16, 2019 at 07:15:51
> Typo in the subject: s/remap/regmap/
>
> On Mon, 15 Apr 2019 21:19:39 +0200
> Vitor Soares <vitor.soares@synopsys.com> wrote:
>
> > Add basic support for I3C bus.
> > This is a simple implementation that only give support
> > for Read and Write commands.
> >
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > ---
> > drivers/base/regmap/Kconfig | 6 +++-
> > drivers/base/regmap/Makefile | 1 +
> > drivers/base/regmap/regmap-i3c.c | 62 ++++++++++++++++++++++++++++++++++++++++
> > include/linux/regmap.h | 20 +++++++++++++
> > 4 files changed, 88 insertions(+), 1 deletion(-)
> > create mode 100644 drivers/base/regmap/regmap-i3c.c
> >
> > diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
> > index 6ad5ef4..c8bbf53 100644
> > --- a/drivers/base/regmap/Kconfig
> > +++ b/drivers/base/regmap/Kconfig
> > @@ -4,7 +4,7 @@
> > # subsystems should select the appropriate symbols.
> >
> > config REGMAP
> > - default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ)
> > + default y if (REGMAP_I2C || REGMAP_SPI || REGMAP_SPMI || REGMAP_W1 || REGMAP_AC97 || REGMAP_MMIO || REGMAP_IRQ || REGMAP_I3C)
> > select IRQ_DOMAIN if REGMAP_IRQ
> > bool
> >
> > @@ -49,3 +49,7 @@ config REGMAP_SOUNDWIRE
> > config REGMAP_SCCB
> > tristate
> > depends on I2C
> > +
> > +config REGMAP_I3C
> > + tristate
> > + depends on I3C
> > diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile
> > index f5b4e88..ff6c7d8 100644
> > --- a/drivers/base/regmap/Makefile
> > +++ b/drivers/base/regmap/Makefile
> > @@ -16,3 +16,4 @@ obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o
> > obj-$(CONFIG_REGMAP_W1) += regmap-w1.o
> > obj-$(CONFIG_REGMAP_SOUNDWIRE) += regmap-sdw.o
> > obj-$(CONFIG_REGMAP_SCCB) += regmap-sccb.o
> > +obj-$(CONFIG_REGMAP_I3C) += regmap-i3c.o
> > diff --git a/drivers/base/regmap/regmap-i3c.c b/drivers/base/regmap/regmap-i3c.c
> > new file mode 100644
> > index 0000000..565997b
> > --- /dev/null
> > +++ b/drivers/base/regmap/regmap-i3c.c
> > @@ -0,0 +1,62 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > + *
> > + * Author: Vitor Soares <vitor.soares@synopsys.com>
> > + */
> > +
> > +#include <linux/regmap.h>
> > +#include <linux/i3c/device.h>
> > +#include <linux/i3c/master.h>
> > +#include <linux/module.h>
> > +
> > +static int regmap_i3c_write(void *context, const void *data, size_t count)
> > +{
> > + struct device *dev = context;
> > + struct i3c_device *i3c = dev_to_i3cdev(dev);
> > + struct i3c_priv_xfer xfers[] = {
> > + {
> > + .rnw = false,
> > + .len = count,
> > + .data.out = data,
> > + },
> > + };
> > +
> > + return i3c_device_do_priv_xfers(i3c, xfers, 1);
> > +}
> > +
> > +static int regmap_i3c_read(void *context,
> > + const void *reg, size_t reg_size,
> > + void *val, size_t val_size)
> > +{
> > + struct device *dev = context;
> > + struct i3c_device *i3c = dev_to_i3cdev(dev);
> > + struct i3c_priv_xfer xfers[2];
> > +
> > + xfers[0].rnw = false;
> > + xfers[0].len = reg_size;
> > + xfers[0].data.out = reg;
> > +
> > + xfers[1].rnw = true;
> > + xfers[1].len = val_size;
> > + xfers[1].data.in = val;
> > +
> > + return i3c_device_do_priv_xfers(i3c, xfers, 2);
> > +}
> > +
> > +static struct regmap_bus regmap_i3c = {
> > + .write = regmap_i3c_write,
> > + .read = regmap_i3c_read,
> > +};
> > +
> > +struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
> > + const struct regmap_config *config,
> > + struct lock_class_key *lock_key,
> > + const char *lock_name)
> > +{
> > + return __devm_regmap_init(&i3c->dev, ®map_i3c, &i3c->dev, config,
> > + lock_key, lock_name);
> > +}
> > +EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
> > +
> > +MODULE_LICENSE("GPL");
> > diff --git a/include/linux/regmap.h b/include/linux/regmap.h
> > index daeec7d..f65984d 100644
> > --- a/include/linux/regmap.h
> > +++ b/include/linux/regmap.h
> > @@ -25,6 +25,7 @@ struct module;
> > struct clk;
> > struct device;
> > struct i2c_client;
> > +struct i3c_device;
> > struct irq_domain;
> > struct slim_device;
> > struct spi_device;
> > @@ -624,6 +625,10 @@ struct regmap *__devm_regmap_init_slimbus(struct slim_device *slimbus,
> > const struct regmap_config *config,
> > struct lock_class_key *lock_key,
> > const char *lock_name);
> > +struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
> > + const struct regmap_config *config,
> > + struct lock_class_key *lock_key,
> > + const char *lock_name);
> > /*
> > * Wrapper for regmap_init macros to include a unique lockdep key and name
> > * for each call. No-op if CONFIG_LOCKDEP is not set.
> > @@ -982,6 +987,21 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
> > #define devm_regmap_init_slimbus(slimbus, config) \
> > __regmap_lockdep_wrapper(__devm_regmap_init_slimbus, #config, \
> > slimbus, config)
> > +
> > +/**
> > + * devm_regmap_init_i3c() - Initialise managed register map
>
> Maybe we should have a more specific name here, as some might want to
> access registers using HDR modes (devm_regmap_init_i3c_sdr()?)
That make sense if the device with HDR capability is able to do
everything in HDR mode and I'm not sure about that.
I would like to wait for a couple of commercial devices before that
change.
>
>
> > + *
> > + * @i3c: Device that will be interacted with
> > + * @config: Configuration for register map
> > + *
> > + * The return value will be an ERR_PTR() on error or a valid pointer
> > + * to a struct regmap. The regmap will be automatically freed by the
> > + * device management code.
> > + */
> > +#define devm_regmap_init_i3c(i3c, config) \
> > + __regmap_lockdep_wrapper(__devm_regmap_init_i3c, #config, \
> > + i3c, config)
> > +
> > int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
> > void regmap_mmio_detach_clk(struct regmap *map);
> > void regmap_exit(struct regmap *map);
Thanks for your feedback.
Best regards,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 2/3] i3c: Add i3c_get_device_id helper
2019-04-16 6:18 ` Boris Brezillon
@ 2019-04-16 14:48 ` Vitor Soares
0 siblings, 0 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-16 14:48 UTC (permalink / raw)
To: Boris Brezillon, Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
Hi Boris,
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, Apr 16, 2019 at 07:18:25
> On Mon, 15 Apr 2019 21:19:40 +0200
> Vitor Soares <vitor.soares@synopsys.com> wrote:
>
> > This helper return the i3c_device_id structure in order the client
> > have access to the driver data.
> >
> > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > ---
> > drivers/i3c/device.c | 8 ++++++++
> > include/linux/i3c/device.h | 1 +
> > 2 files changed, 9 insertions(+)
> >
> > diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
> > index 472be99..8ab8e4c 100644
> > --- a/drivers/i3c/device.c
> > +++ b/drivers/i3c/device.c
> > @@ -235,6 +235,14 @@ struct i3c_device *dev_to_i3cdev(struct device *dev)
> > }
> > EXPORT_SYMBOL_GPL(dev_to_i3cdev);
> >
> > +const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev)
> > +{
> > + const struct i3c_driver *i3cdrv = drv_to_i3cdrv(i3cdev->dev.driver);
> > +
> > + return i3cdrv->id_table;
> > +}
> > +EXPORT_SYMBOL_GPL(i3c_get_device_id);
>
> I think what you want is i3c_device_match_id().
I want the i3c_device_id struct of an i3c_device. What is the name that
you suggest?
>Just move the function
> to drivers/i3c/device.c, export it and define its prototype in
> include/i3c/device.h.
You are right, this should go for the device side.
>
> > +
> > /**
> > * i3c_driver_register_with_owner() - register an I3C device driver
> > *
> > diff --git a/include/linux/i3c/device.h b/include/linux/i3c/device.h
> > index 7ee7e30..ee48886 100644
> > --- a/include/linux/i3c/device.h
> > +++ b/include/linux/i3c/device.h
> > @@ -211,6 +211,7 @@ static inline struct i3c_driver *drv_to_i3cdrv(struct device_driver *drv)
> >
> > struct device *i3cdev_to_dev(struct i3c_device *i3cdev);
> > struct i3c_device *dev_to_i3cdev(struct device *dev);
> > +const struct i3c_device_id *i3c_get_device_id(struct i3c_device *i3cdev);
> >
> > static inline void i3cdev_set_drvdata(struct i3c_device *i3cdev,
> > void *data)
Best regards,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-16 8:05 ` Boris Brezillon
@ 2019-04-16 15:00 ` Vitor Soares
0 siblings, 0 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-16 15:00 UTC (permalink / raw)
To: Boris Brezillon, Lorenzo Bianconi
Cc: Lars-Peter Clausen, bbrezillon, linux-iio, gregkh, joao.pinto,
rafael, Linux Kernel Mailing List, Vitor Soares, broonie,
Peter Meerwald-Stadler, Hartmut Knaack, linux-i3c,
Jonathan Cameron
Hi Boris and Lorenzo,
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, Apr 16, 2019 at 09:05:40
> On Tue, 16 Apr 2019 09:58:33 +0200
> Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> wrote:
>
> > >
> > > On Mon, 15 Apr 2019 21:19:41 +0200
> > > Vitor Soares <vitor.soares@synopsys.com> wrote:
> > >
> > > > For today the st_lsm6dsx driver support lsm6dso sensor only in
> > > > spi and i2c mode.
> > > >
> > > > The lsm6dso is also i3c capable so lets give i3c support to it.
> > > >
> > > > Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
> > > > ---
> > > > drivers/iio/imu/st_lsm6dsx/Kconfig | 8 +++-
> > > > drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
> > > > drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 67 +++++++++++++++++++++++++++++
> > > > 3 files changed, 75 insertions(+), 1 deletion(-)
> > > > create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > > >
> > > > diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > > > index 094fd00..1ab9bbf 100644
> > > > --- a/drivers/iio/imu/st_lsm6dsx/Kconfig
> > > > +++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
> > > > @@ -1,11 +1,12 @@
> > > >
> > > > config IIO_ST_LSM6DSX
> > > > tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
> > > > - depends on (I2C || SPI)
> > > > + depends on (I2C || SPI || I3C)
> > > > select IIO_BUFFER
> > > > select IIO_KFIFO_BUF
> > > > select IIO_ST_LSM6DSX_I2C if (I2C)
> > > > select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
> > > > + select IIO_ST_LSM6DSX_I3C if (I3C)
> > > > help
> > > > Say yes here to build support for STMicroelectronics LSM6DSx imu
> > > > sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
> > > > @@ -23,3 +24,8 @@ config IIO_ST_LSM6DSX_SPI
> > > > tristate
> > > > depends on IIO_ST_LSM6DSX
> > > > select REGMAP_SPI
> > > > +
> > > > +config IIO_ST_LSM6DSX_I3C
> > > > + tristate
> > > > + depends on IIO_ST_LSM6DSX
> > > > + select REGMAP_I3C
> > > > diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
> > > > index e5f733c..c676965 100644
> > > > --- a/drivers/iio/imu/st_lsm6dsx/Makefile
> > > > +++ b/drivers/iio/imu/st_lsm6dsx/Makefile
> > > > @@ -4,3 +4,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
> > > > obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
> > > > obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
> > > > obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
> > > > +obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o
> > > > diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > > > new file mode 100644
> > > > index 0000000..2df5e70
> > > > --- /dev/null
> > > > +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
> > > > @@ -0,0 +1,67 @@
> > > > +// SPDX-License-Identifier: GPL-2.0
> > > > +/*
> > > > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > > > + *
> > > > + * Author: Vitor Soares <vitor.soares@synopsys.com>
> > > > + */
> > > > +
> > > > +#include <linux/kernel.h>
> > > > +#include <linux/module.h>
> > > > +#include <linux/i3c/device.h>
> > > > +#include <linux/i3c/master.h>
> > > > +#include <linux/slab.h>
> > > > +#include <linux/of.h>
> > > > +#include <linux/regmap.h>
> > > > +
> > > > +#include "st_lsm6dsx.h"
> > > > +
> > > > +#define NAME_SIZE 32
> > > > +
> > > > +struct st_lsm6dsx_i3c_data {
> > > > + char name[NAME_SIZE];
> > >
> > > const char *name;
I will fix this next patch.
> > >
> > > > + enum st_lsm6dsx_hw_id id;
> > > > +};
> > > > +
> > > > +static const struct st_lsm6dsx_i3c_data hw_data[] = {
> > >
> > > No need to make it an array, and it should probably be named
> > > st_lsm6dso_data not hw_data.
> >
> > I guess it will be used even for future devices so I would prefer to
> > make it an array with a 'general' name
The idea is that one. Are you ok with hw_data name?
Should I add the lsm6dsr support here or send in a different patch?
>
> I find it more error-prone to reference an array with an opaque index
> number than reference an instance with a name that clearly reflects
> what HW it describes (see the I3C_DEVICE() entry at the end of the
> driver), but okay.
I will address this next version.
>
> >
> > Regards,
> > Lorenzo
> >
> > >
> > > > + { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
> > > > +};
> > > > +
> > > > +static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
> > > > + .reg_bits = 8,
> > > > + .val_bits = 8,
> > > > +};
> > > > +
> > > > +static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
> > > > +{
> > > > + const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
> > >
> > > i3c_device_match_id(i3cdev,
> > > st_lsm6dsx_i3c_ids);
> > >
> > > > + const struct st_lsm6dsx_i3c_data *hw_data = id->data;
> > > > + struct regmap *regmap;
> > > > +
> > > > + regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
> > > > + if (IS_ERR(regmap)) {
> > > > + dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
> > > > + (int)PTR_ERR(regmap));
> > > > + return PTR_ERR(regmap);
> > > > + }
> > > > +
> > > > + return st_lsm6dsx_probe(&i3cdev->dev, 0, hw_data->id,
> > > > + hw_data->name, regmap);
> > > > +}
> > > > +
> > > > +
> > > > +static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
> > > > + I3C_DEVICE(0x0104, 0x006C, &hw_data[0]),
> > > > + { /* sentinel */ },
> > > > +};
> > > > +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> > > > +
> > > > +static struct i3c_driver st_lsm6dsx_driver = {
> > > > + .driver.name = "st_lsm6dsx_i3c",
> > > > + .probe = st_lsm6dsx_i3c_probe,
> > > > + .id_table = st_lsm6dsx_i3c_ids,
> > >
> > > You should probably set the pm_ops here (st_lsm6dsx_pm_ops).
> > >
> > > > +};
> > > > +module_i3c_driver(st_lsm6dsx_driver);
> > > > +
> > > > +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> > > > +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> > > > +MODULE_LICENSE("GPL v2");
> > > > +
> > >
> > > You can remove this blank line.
> > >
> >
> >
Best regards,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support
2019-04-16 6:25 ` Boris Brezillon
2019-04-16 7:58 ` Lorenzo Bianconi
@ 2019-04-16 15:02 ` Vitor Soares
1 sibling, 0 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-16 15:02 UTC (permalink / raw)
To: Boris Brezillon, Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto, rafael,
linux-kernel, broonie, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
Hi Boris,
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, Apr 16, 2019 at 07:25:39
> > +MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
> > +
> > +static struct i3c_driver st_lsm6dsx_driver = {
> > + .driver.name = "st_lsm6dsx_i3c",
> > + .probe = st_lsm6dsx_i3c_probe,
> > + .id_table = st_lsm6dsx_i3c_ids,
>
> You should probably set the pm_ops here (st_lsm6dsx_pm_ops).
Yes, I missed that.
>
> > +};
> > +module_i3c_driver(st_lsm6dsx_driver);
> > +
> > +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> > +MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
> > +MODULE_LICENSE("GPL v2");
> > +
>
> You can remove this blank line.
Thanks for your feedback.
Best regards,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 1/3] remap: Add I3C bus support
[not found] ` <20190416153948.GF4834@sirena.org.uk>
@ 2019-04-23 14:58 ` Vitor Soares
2019-04-23 15:14 ` Boris Brezillon
0 siblings, 1 reply; 19+ messages in thread
From: Vitor Soares @ 2019-04-23 14:58 UTC (permalink / raw)
To: Mark Brown, Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, rafael, linux-kernel,
joao.pinto@synopsys.com, pmeerw, knaack.h, lorenzo.bianconi83,
linux-i3c, jic23
Hi Mark,
From: Mark Brown <broonie@kernel.org>
Date: Tue, Apr 16, 2019 at 16:39:48
> On Mon, Apr 15, 2019 at 09:19:39PM +0200, Vitor Soares wrote:
>
> > +++ b/drivers/base/regmap/regmap-i3c.c
> > @@ -0,0 +1,62 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
>
> Please make the entire header C++ style so it looks more consistent.
> Otherwise this looks good modulo
I will change it next drop.
> Boris' comment; I'm fine with leaving
> extra modes for later so long as they can be introduced without
> disrupting existing users so the only question there would be if we
> should name the init function in some way that's specific to the I/O
> mode being used here.
My concern is that booth modes (SDR/HDR) might be needed on the device.
e.g. use SDR to configure the device and use HDR to send/receive large
data.
Best regards,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* Re: [PATCH 1/3] remap: Add I3C bus support
2019-04-23 14:58 ` Vitor Soares
@ 2019-04-23 15:14 ` Boris Brezillon
2019-04-23 15:55 ` Vitor Soares
0 siblings, 1 reply; 19+ messages in thread
From: Boris Brezillon @ 2019-04-23 15:14 UTC (permalink / raw)
To: Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto@synopsys.com,
rafael, linux-kernel, Mark Brown, pmeerw, knaack.h,
lorenzo.bianconi83, linux-i3c, jic23
On Tue, 23 Apr 2019 14:58:06 +0000
Vitor Soares <Vitor.Soares@synopsys.com> wrote:
> Hi Mark,
>
> From: Mark Brown <broonie@kernel.org>
> Date: Tue, Apr 16, 2019 at 16:39:48
>
> > On Mon, Apr 15, 2019 at 09:19:39PM +0200, Vitor Soares wrote:
> >
> > > +++ b/drivers/base/regmap/regmap-i3c.c
> > > @@ -0,0 +1,62 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> >
> > Please make the entire header C++ style so it looks more consistent.
> > Otherwise this looks good modulo
>
> I will change it next drop.
>
> > Boris' comment; I'm fine with leaving
> > extra modes for later so long as they can be introduced without
> > disrupting existing users so the only question there would be if we
> > should name the init function in some way that's specific to the I/O
> > mode being used here.
>
> My concern is that booth modes (SDR/HDR) might be needed on the device.
> e.g. use SDR to configure the device and use HDR to send/receive large
> data.
I'd say that we shouldn't use the regmap abstraction in this case or
have a driver-specific backend implementation for it. I guess the
common case is "regs are accessed in SDR mode", so let's keep the name
as it is now and we'll define devm_regmap_init_i3c_hdr() if we ever
need it. Please make it explicit in the kernel-doc that we're using SDR
transfers here.
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
* RE: [PATCH 1/3] remap: Add I3C bus support
2019-04-23 15:14 ` Boris Brezillon
@ 2019-04-23 15:55 ` Vitor Soares
0 siblings, 0 replies; 19+ messages in thread
From: Vitor Soares @ 2019-04-23 15:55 UTC (permalink / raw)
To: Boris Brezillon, Vitor Soares
Cc: lars, bbrezillon, linux-iio, gregkh, joao.pinto@synopsys.com,
rafael, linux-kernel, Mark Brown, pmeerw, knaack.h,
lorenzo.bianconi83, linux-i3c, jic23
Hi Boris,
From: Boris Brezillon <boris.brezillon@collabora.com>
Date: Tue, Apr 23, 2019 at 16:14:16
> On Tue, 23 Apr 2019 14:58:06 +0000
> Vitor Soares <Vitor.Soares@synopsys.com> wrote:
>
> > Hi Mark,
> >
> > From: Mark Brown <broonie@kernel.org>
> > Date: Tue, Apr 16, 2019 at 16:39:48
> >
> > > On Mon, Apr 15, 2019 at 09:19:39PM +0200, Vitor Soares wrote:
> > >
> > > > +++ b/drivers/base/regmap/regmap-i3c.c
> > > > @@ -0,0 +1,62 @@
> > > > +// SPDX-License-Identifier: GPL-2.0
> > > > +/*
> > > > + * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> > >
> > > Please make the entire header C++ style so it looks more consistent.
> > > Otherwise this looks good modulo
> >
> > I will change it next drop.
> >
> > > Boris' comment; I'm fine with leaving
> > > extra modes for later so long as they can be introduced without
> > > disrupting existing users so the only question there would be if we
> > > should name the init function in some way that's specific to the I/O
> > > mode being used here.
> >
> > My concern is that booth modes (SDR/HDR) might be needed on the device.
> > e.g. use SDR to configure the device and use HDR to send/receive large
> > data.
>
> I'd say that we shouldn't use the regmap abstraction in this case or
> have a driver-specific backend implementation for it. I guess the
> common case is "regs are accessed in SDR mode", so let's keep the name
> as it is now and we'll define devm_regmap_init_i3c_hdr() if we ever
> need it. Please make it explicit in the kernel-doc that we're using SDR
> transfers here.
Where should it be documented? Can you give an example?
Thanks,
Vitor Soares
_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c
^ permalink raw reply [flat|nested] 19+ messages in thread
end of thread, other threads:[~2019-05-06 6:13 UTC | newest]
Thread overview: 19+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-04-15 19:19 [PATCH 0/3] Add ST lsm6dso i3c suppport Vitor Soares
2019-04-15 19:19 ` [PATCH 1/3] remap: Add I3C bus support Vitor Soares
2019-04-16 6:15 ` Boris Brezillon
2019-04-16 14:41 ` Vitor Soares
[not found] ` <20190416153948.GF4834@sirena.org.uk>
2019-04-23 14:58 ` Vitor Soares
2019-04-23 15:14 ` Boris Brezillon
2019-04-23 15:55 ` Vitor Soares
2019-04-15 19:19 ` [PATCH 2/3] i3c: Add i3c_get_device_id helper Vitor Soares
2019-04-16 6:18 ` Boris Brezillon
2019-04-16 14:48 ` Vitor Soares
2019-04-15 19:19 ` [PATCH 3/3] iio: imu: st_lsm6dsx: Add i3c basic support Vitor Soares
2019-04-15 22:17 ` Lorenzo Bianconi
2019-04-16 13:53 ` Vitor Soares
2019-04-16 6:25 ` Boris Brezillon
2019-04-16 7:58 ` Lorenzo Bianconi
2019-04-16 8:05 ` Boris Brezillon
2019-04-16 15:00 ` Vitor Soares
2019-04-16 15:02 ` Vitor Soares
2019-04-16 6:32 ` [PATCH 0/3] Add ST lsm6dso i3c suppport Boris Brezillon
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).