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Date: Thu, 14 Mar 2013 10:51:16 +0800
From: Dong Aisheng <dong.aisheng@...aro.org>
To: Alexander Shiyan <shc_work@...l.ru>
Cc: linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
Samuel Ortiz <sameo@...ux.intel.com>,
Mark Brown <broonie@...nsource.wolfsonmicro.com>,
Thierry Reding <thierry.reding@...onic-design.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Stephen Warren <swarren@...dotorg.org>
Subject: Re: [PATCH v7 2/2] mfd: syscon: Add non-DT support
On 14 March 2013 01:34, Alexander Shiyan <shc_work@...l.ru> wrote:
> This patch allow using syscon driver from the platform data, i.e.
> possibility using driver on systems without oftree support.
> For search syscon device from the client drivers,
> "syscon_regmap_lookup_by_pdevname" function was added.
>
> Signed-off-by: Alexander Shiyan <shc_work@...l.ru>
Actually i've acked this series before, usually you can send out the
updated series
with my tag if no other big changes except the minor comments fix i pointed out.
Here again, for this series:
Acked-by: Dong Aisheng <dong.aisheng@...aro.org>
Regards
Dong Aisheng
> ---
> drivers/mfd/Kconfig | 1 -
> drivers/mfd/syscon.c | 75 +++++++++++++++++++++++++++-------------------
> include/linux/mfd/syscon.h | 1 +
> 3 files changed, 46 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 671f5b1..8fdd87e 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -1070,7 +1070,6 @@ config MFD_STA2X11
>
> config MFD_SYSCON
> bool "System Controller Register R/W Based on Regmap"
> - depends on OF
> select REGMAP_MMIO
> help
> Select this option to enable accessing system control registers
> diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
> index 674af14..d1e5eb9 100644
> --- a/drivers/mfd/syscon.c
> +++ b/drivers/mfd/syscon.c
> @@ -29,7 +29,7 @@ struct syscon {
> struct regmap *regmap;
> };
>
> -static int syscon_match(struct device *dev, void *data)
> +static int syscon_match_node(struct device *dev, void *data)
> {
> struct device_node *dn = data;
>
> @@ -42,7 +42,7 @@ struct regmap *syscon_node_to_regmap(struct device_node *np)
> struct device *dev;
>
> dev = driver_find_device(&syscon_driver.driver, NULL, np,
> - syscon_match);
> + syscon_match_node);
> if (!dev)
> return ERR_PTR(-EPROBE_DEFER);
>
> @@ -68,6 +68,34 @@ struct regmap *syscon_regmap_lookup_by_compatible(const char *s)
> }
> EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_compatible);
>
> +static int syscon_match_pdevname(struct device *dev, void *data)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + const struct platform_device_id *id = platform_get_device_id(pdev);
> +
> + if (id)
> + if (!strcmp(id->name, (const char *)data))
> + return 1;
> +
> + return !strcmp(dev_name(dev), (const char *)data);
> +}
> +
> +struct regmap *syscon_regmap_lookup_by_pdevname(const char *s)
> +{
> + struct device *dev;
> + struct syscon *syscon;
> +
> + dev = driver_find_device(&syscon_driver.driver, NULL, (void *)s,
> + syscon_match_pdevname);
> + if (!dev)
> + return ERR_PTR(-EPROBE_DEFER);
> +
> + syscon = dev_get_drvdata(dev);
> +
> + return syscon->regmap;
> +}
> +EXPORT_SYMBOL_GPL(syscon_regmap_lookup_by_pdevname);
> +
> struct regmap *syscon_regmap_lookup_by_phandle(struct device_node *np,
> const char *property)
> {
> @@ -99,28 +127,22 @@ static struct regmap_config syscon_regmap_config = {
> static int syscon_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> - struct device_node *np = dev->of_node;
> struct syscon *syscon;
> - struct resource res;
> - int ret;
> -
> - if (!np)
> - return -ENOENT;
> + struct resource *res;
>
> - syscon = devm_kzalloc(dev, sizeof(struct syscon),
> - GFP_KERNEL);
> + syscon = devm_kzalloc(dev, sizeof(*syscon), GFP_KERNEL);
> if (!syscon)
> return -ENOMEM;
>
> - syscon->base = of_iomap(np, 0);
> - if (!syscon->base)
> - return -EADDRNOTAVAIL;
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -ENOENT;
>
> - ret = of_address_to_resource(np, 0, &res);
> - if (ret)
> - return ret;
> + syscon->base = devm_ioremap(dev, res->start, resource_size(res));
> + if (!syscon->base)
> + return -ENOMEM;
>
> - syscon_regmap_config.max_register = res.end - res.start - 3;
> + syscon_regmap_config.max_register = res->end - res->start - 3;
> syscon->regmap = devm_regmap_init_mmio(dev, syscon->base,
> &syscon_regmap_config);
> if (IS_ERR(syscon->regmap)) {
> @@ -130,22 +152,15 @@ static int syscon_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, syscon);
>
> - dev_info(dev, "syscon regmap start 0x%x end 0x%x registered\n",
> - res.start, res.end);
> + dev_info(dev, "regmap 0x%x-0x%x registered\n", res->start, res->end);
>
> return 0;
> }
>
> -static int syscon_remove(struct platform_device *pdev)
> -{
> - struct syscon *syscon;
> -
> - syscon = platform_get_drvdata(pdev);
> - iounmap(syscon->base);
> - platform_set_drvdata(pdev, NULL);
> -
> - return 0;
> -}
> +static const struct platform_device_id syscon_ids[] = {
> + { "syscon", },
> + { }
> +};
>
> static struct platform_driver syscon_driver = {
> .driver = {
> @@ -154,7 +169,7 @@ static struct platform_driver syscon_driver = {
> .of_match_table = of_syscon_match,
> },
> .probe = syscon_probe,
> - .remove = syscon_remove,
> + .id_table = syscon_ids,
> };
>
> static int __init syscon_init(void)
> diff --git a/include/linux/mfd/syscon.h b/include/linux/mfd/syscon.h
> index 6aeb6b8..5c9ee6e 100644
> --- a/include/linux/mfd/syscon.h
> +++ b/include/linux/mfd/syscon.h
> @@ -17,6 +17,7 @@
>
> extern struct regmap *syscon_node_to_regmap(struct device_node *np);
> extern struct regmap *syscon_regmap_lookup_by_compatible(const char *s);
> +extern struct regmap *syscon_regmap_lookup_by_pdevname(const char *s);
> extern struct regmap *syscon_regmap_lookup_by_phandle(
> struct device_node *np,
> const char *property);
> --
> 1.7.12.4
>
--
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