From: Marek Szyprowski <m.szyprowski@samsung.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
Support Opensource <support.opensource@diasemi.com>,
Lee Jones <lee.jones@linaro.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
Tony Lindgren <tony@atomide.com>,
linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
linux-omap@vger.kernel.org, patches@opensource.cirrus.com
Subject: Re: [PATCH 5/7] mfd: sec: Simplify getting of_device_id match data
Date: Tue, 20 Apr 2021 09:12:45 +0200 [thread overview]
Message-ID: <a65318f6-1465-a35c-a987-8b833311ef3a@samsung.com> (raw)
In-Reply-To: <4a5e80c0-653e-a4d6-630e-0d75e3779f6d@canonical.com>
On 20.04.2021 09:03, Krzysztof Kozlowski wrote:
> On 20/04/2021 07:25, Marek Szyprowski wrote:
>> On 19.04.2021 10:17, Krzysztof Kozlowski wrote:
>>> Use of_device_get_match_data() to make the code slightly smaller.
>>>
>>> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
>>> ---
>>> drivers/mfd/sec-core.c | 9 +++------
>>> 1 file changed, 3 insertions(+), 6 deletions(-)
>>>
>>> diff --git a/drivers/mfd/sec-core.c b/drivers/mfd/sec-core.c
>>> index 8d55992da19e..3126c39f3203 100644
>>> --- a/drivers/mfd/sec-core.c
>>> +++ b/drivers/mfd/sec-core.c
>>> @@ -10,6 +10,7 @@
>>> #include <linux/slab.h>
>>> #include <linux/i2c.h>
>>> #include <linux/of.h>
>>> +#include <linux/of_device.h>
>>> #include <linux/of_irq.h>
>>> #include <linux/interrupt.h>
>>> #include <linux/pm_runtime.h>
>>> @@ -324,12 +325,8 @@ static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
>>> const struct i2c_device_id *id)
>>> {
>>> #ifdef CONFIG_OF
>>> - if (i2c->dev.of_node) {
>>> - const struct of_device_id *match;
>>> -
>>> - match = of_match_node(sec_dt_match, i2c->dev.of_node);
>>> - return (unsigned long)match->data;
>>> - }
>>> + if (i2c->dev.of_node)
>>> + return (unsigned long)of_device_get_match_data(&i2c->dev);
>>> #endif
>> Does it make any sense to keep the #ifdef CONFIG_OF after this change?
> Good point, it was only to hide usage of of_device_id table.
>
>> I would also skip (i2c->dev.of_node) check, because
>> of_device_get_match_data() already does that (although indirectly).
> First, the enum sec_device_type would need to be changed so it starts
> from 1, not 0. It's because the value returned by this function is later
> assigned to that enum and there is no way currently to differentiate
> between NULL and S5M8767X.
>
> Second, it wouldn't make the code smaller;
>
> unsigned long data;
> data = of_device_get_match_data(&i2c->dev);
> if (data)
> return data;
Then maybe one should go further and remove legacy, non-of based
initialization, because it is not used at all. This will simplify it
even more.
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
next prev parent reply other threads:[~2021-04-20 7:12 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-19 8:17 [PATCH 1/7] mfd: max8997: Simplify getting of_device_id match data Krzysztof Kozlowski
2021-04-19 8:17 ` [PATCH 2/7] mfd: max8998: " Krzysztof Kozlowski
2021-04-19 8:17 ` [PATCH 3/7] mfd: da9052: " Krzysztof Kozlowski
2021-04-19 11:00 ` Adam Thomson
2021-04-19 8:17 ` [PATCH 4/7] " Krzysztof Kozlowski
2021-04-19 11:00 ` Adam Thomson
2021-04-19 11:04 ` Krzysztof Kozlowski
2021-04-19 8:17 ` [PATCH 5/7] mfd: sec: " Krzysztof Kozlowski
2021-04-20 5:25 ` Marek Szyprowski
2021-04-20 7:03 ` Krzysztof Kozlowski
2021-04-20 7:12 ` Marek Szyprowski [this message]
2021-04-20 7:25 ` Krzysztof Kozlowski
2021-04-19 8:17 ` [PATCH 6/7] mfd: wm831x: Correct kerneldoc Krzysztof Kozlowski
2021-04-19 8:41 ` Charles Keepax
2021-04-19 8:17 ` [PATCH 7/7] mfd: twl: " Krzysztof Kozlowski
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