rtc: ds2404: drop needless struct ds2404::rtc member

The memory pointed to by the ::rtc member is managed via devres, and
no code in this driver uses it past _probe().

We can drop it from the structure and just use a local temporary
variable, reducing runtime memory consumption by a few bytes.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20250304-rtc-cleanups-v2-4-d4689a71668c@linaro.org
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-ds2404.c b/drivers/rtc/rtc-ds2404.c
index 3231fd9f61da49bdaf00e46486fc34836094ee78..217694eca36c3432a8db3b874374e347eeb802d9 100644 (file)
--- a/drivers/rtc/rtc-ds2404.c
+++ b/drivers/rtc/rtc-ds2404.c
@@ -31,7 +31,6 @@ struct ds2404 {
        struct gpio_desc *rst_gpiod;
        struct gpio_desc *clk_gpiod;
        struct gpio_desc *dq_gpiod;
-       struct rtc_device *rtc;
 };
 
 static int ds2404_gpio_map(struct ds2404 *chip, struct platform_device *pdev)
@@ -182,6 +181,7 @@ static const struct rtc_class_ops ds2404_rtc_ops = {
 static int rtc_probe(struct platform_device *pdev)
 {
        struct ds2404 *chip;
+       struct rtc_device *rtc;
        int retval = -EBUSY;
 
        chip = devm_kzalloc(&pdev->dev, sizeof(struct ds2404), GFP_KERNEL);
@@ -190,9 +190,9 @@ static int rtc_probe(struct platform_device *pdev)
 
        chip->dev = &pdev->dev;
 
-       chip->rtc = devm_rtc_allocate_device(&pdev->dev);
-       if (IS_ERR(chip->rtc))
-               return PTR_ERR(chip->rtc);
+       rtc = devm_rtc_allocate_device(&pdev->dev);
+       if (IS_ERR(rtc))
+               return PTR_ERR(rtc);
 
        retval = ds2404_gpio_map(chip, pdev);
        if (retval)
@@ -200,10 +200,10 @@ static int rtc_probe(struct platform_device *pdev)
 
        platform_set_drvdata(pdev, chip);
 
-       chip->rtc->ops = &ds2404_rtc_ops;
-       chip->rtc->range_max = U32_MAX;
+       rtc->ops = &ds2404_rtc_ops;
+       rtc->range_max = U32_MAX;
 
-       retval = devm_rtc_register_device(chip->rtc);
+       retval = devm_rtc_register_device(rtc);
        if (retval)
                return retval;