Linux-i3c Archive on lore.kernel.org
 help / color / Atom feed
From: Boris Brezillon <boris.brezillon@collabora.com>
To: Vitor Soares <Vitor.Soares@synopsys.com>
Cc: Joao.Pinto@synopsys.com, rafael@kernel.org,
	linux-iio@vger.kernel.org, gregkh@linuxfoundation.org,
	bbrezillon@kernel.org, linux-kernel@vger.kernel.org,
	linux-i3c@lists.infradead.org, lorenzo@kernel.org
Subject: Re: [PATCH v4 1/3] regmap: add i3c bus support
Date: Fri, 12 Jul 2019 17:59:15 +0200
Message-ID: <20190712175915.4c4260a9@linux.home> (raw)
In-Reply-To: <7deb1300474b68ebb6fc3ecb02577e4f657250a5.1562931742.git.vitor.soares@synopsys.com>

On Fri, 12 Jul 2019 13:53:28 +0200
Vitor Soares <Vitor.Soares@synopsys.com> wrote:

> Add basic support for i3c bus.
> This is a simple implementation that only give support
> for SDR Read and Write commands.
> 

This patch has been applied by Mark already. Please make sure to drop
already applied patches when submitting a new version.

> 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 | 60 ++++++++++++++++++++++++++++++++++++++++
>  include/linux/regmap.h           | 20 ++++++++++++++
>  4 files changed, 86 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..1578fb5
> --- /dev/null
> +++ b/drivers/base/regmap/regmap-i3c.c
> @@ -0,0 +1,60 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
> +
> +#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, &regmap_i3c, &i3c->dev, config,
> +				  lock_key, lock_name);
> +}
> +EXPORT_SYMBOL_GPL(__devm_regmap_init_i3c);
> +
> +MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
> +MODULE_DESCRIPTION("Regmap I3C Module");
> +MODULE_LICENSE("GPL v2");
> 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);


_______________________________________________
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-12 11:53 [PATCH v4 0/3] Add ST lsm6dso i3c support Vitor Soares
2019-07-12 11:53 ` [PATCH v4 1/3] regmap: add i3c bus support Vitor Soares
2019-07-12 15:59   ` Boris Brezillon [this message]
2019-07-12 16:14     ` Vitor Soares
2019-07-12 11:53 ` [PATCH v4 2/3] i3c: move i3c_device_match_id to device.c and export it Vitor Soares
2019-07-12 16:03   ` Boris Brezillon
2019-07-12 16:21     ` Vitor Soares
2019-07-12 16:34       ` Boris Brezillon
2019-07-12 11:53 ` [PATCH v4 3/3] iio: imu: st_lsm6dsx: add i3c basic support for LSM6DSO and LSM6DSR Vitor Soares
2019-07-12 16:14   ` Boris Brezillon
2019-07-12 16:28     ` Vitor Soares
2019-07-12 16:43       ` Boris Brezillon
2019-07-12 18:40         ` Vitor Soares
2019-07-12 20:03           ` Boris Brezillon
2019-07-16 13:22             ` Vitor Soares
2019-07-16 13:40               ` Boris Brezillon
2019-07-12 15:58 ` [PATCH v4 0/3] Add ST lsm6dso i3c support Boris Brezillon

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190712175915.4c4260a9@linux.home \
    --to=boris.brezillon@collabora.com \
    --cc=Joao.Pinto@synopsys.com \
    --cc=Vitor.Soares@synopsys.com \
    --cc=bbrezillon@kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-i3c@lists.infradead.org \
    --cc=linux-iio@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lorenzo@kernel.org \
    --cc=rafael@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-i3c Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-i3c/0 linux-i3c/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-i3c linux-i3c/ https://lore.kernel.org/linux-i3c \
		linux-i3c@lists.infradead.org linux-i3c@archiver.kernel.org
	public-inbox-index linux-i3c


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-i3c


AGPL code for this site: git clone https://public-inbox.org/ public-inbox