[U-Boot] [PATCH 41/57] x86: i2c: Add a stub driver for Intel I2C/SMbus

[Heiko Schocher]

Hello Simon,

Am 08.12.2015 um 04:39 schrieb Simon Glass:
> This is used on most Intel platforms. We don't have a driver for it yet, but
> add a stub to handle the init. For now this targets ivybridge so we may want
> to add a device tree binding and generalise it when other platforms are
> supported.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
>   drivers/i2c/Kconfig     |  7 +++++++
>   drivers/i2c/Makefile    |  1 +
>   drivers/i2c/intel_i2c.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++
>   3 files changed, 59 insertions(+)
>   create mode 100644 drivers/i2c/intel_i2c.c

Reviewed-by: Heiko Schocher <hs at denx.de>

bye,
Heiko
>
> diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
> index 14adda2..fe98557 100644
> --- a/drivers/i2c/Kconfig
> +++ b/drivers/i2c/Kconfig
> @@ -58,6 +58,13 @@ config DM_I2C_GPIO
>   	  bindings are supported.
>   	  Binding info: doc/device-tree-bindings/i2c/i2c-gpio.txt
>
> +config SYS_I2C_INTEL
> +	bool "Intel I2C/SMBUS driver"
> +	depends on DM_I2C
> +	help
> +	  Add support for the Intel SMBUS driver. So far this driver is just
> +	  a stub which perhaps some basic init.
> +
>   config SYS_I2C_ROCKCHIP
>   	bool "Rockchip I2C driver"
>   	depends on DM_I2C
> diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
> index 811ad9b..a2a956a 100644
> --- a/drivers/i2c/Makefile
> +++ b/drivers/i2c/Makefile
> @@ -21,6 +21,7 @@ obj-$(CONFIG_SYS_I2C_DW) += designware_i2c.o
>   obj-$(CONFIG_SYS_I2C_FSL) += fsl_i2c.o
>   obj-$(CONFIG_SYS_I2C_FTI2C010) += fti2c010.o
>   obj-$(CONFIG_SYS_I2C_IHS) += ihs_i2c.o
> +obj-$(CONFIG_SYS_I2C_INTEL) += intel_i2c.o
>   obj-$(CONFIG_SYS_I2C_KONA) += kona_i2c.o
>   obj-$(CONFIG_SYS_I2C_LPC32XX) += lpc32xx_i2c.o
>   obj-$(CONFIG_SYS_I2C_MVTWSI) += mvtwsi.o
> diff --git a/drivers/i2c/intel_i2c.c b/drivers/i2c/intel_i2c.c
> new file mode 100644
> index 0000000..1082d1a
> --- /dev/null
> +++ b/drivers/i2c/intel_i2c.c
> @@ -0,0 +1,51 @@
> +/*
> + * Copyright (c) 2015 Google, Inc
> + * Written by Simon Glass <sjg at chromium.org>
> + *
> + * SPDX-License-Identifier:     GPL-2.0+
> + */
> +
> +#include <common.h>
> +#include <dm.h>
> +#include <i2c.h>
> +#include <asm/io.h>
> +
> +int intel_i2c_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
> +{
> +	return -ENOSYS;
> +}
> +
> +int intel_i2c_probe_chip(struct udevice *bus, uint chip_addr, uint chip_flags)
> +{
> +	return -ENOSYS;
> +}
> +
> +int intel_i2c_set_bus_speed(struct udevice *bus, unsigned int speed)
> +{
> +	return 0;
> +}
> +
> +static int intel_i2c_probe(struct udevice *dev)
> +{
> +	return 0;
> +}
> +
> +static const struct dm_i2c_ops intel_i2c_ops = {
> +	.xfer		= intel_i2c_xfer,
> +	.probe_chip	= intel_i2c_probe_chip,
> +	.set_bus_speed	= intel_i2c_set_bus_speed,
> +};
> +
> +static const struct udevice_id intel_i2c_ids[] = {
> +	{ .compatible = "intel,ich-i2c" },
> +	{ }
> +};
> +
> +U_BOOT_DRIVER(intel_i2c) = {
> +	.name	= "i2c_intel",
> +	.id	= UCLASS_I2C,
> +	.of_match = intel_i2c_ids,
> +	.per_child_auto_alloc_size = sizeof(struct dm_i2c_chip),
> +	.ops	= &intel_i2c_ops,
> +	.probe	= intel_i2c_probe,
> +};
>

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany