linux-kernel - [PATCH v3 3/8] pwm: lpss: Move resource mapping to the glue drivers

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Message-Id: <20220927144723.9655-4-andriy.shevchenko@linux.intel.com>
Date:   Tue, 27 Sep 2022 17:47:18 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Hans de Goede <hdegoede@...hat.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Thierry Reding <thierry.reding@...il.com>
Subject: [PATCH v3 3/8] pwm: lpss: Move resource mapping to the glue drivers

Move resource mapping to the glue drivers which helps
to transform pwm_lpss_probe() to pure library function
that may be used by others without need of specific
resource management.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
---
 drivers/pwm/pwm-lpss-pci.c      | 6 +++++-
 drivers/pwm/pwm-lpss-platform.c | 9 ++++++---
 drivers/pwm/pwm-lpss.c          | 7 ++-----
 drivers/pwm/pwm-lpss.h          | 2 +-
 4 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/drivers/pwm/pwm-lpss-pci.c b/drivers/pwm/pwm-lpss-pci.c
index 9f2c666b95ec..f3367e844e61 100644
--- a/drivers/pwm/pwm-lpss-pci.c
+++ b/drivers/pwm/pwm-lpss-pci.c
@@ -25,8 +25,12 @@ static int pwm_lpss_probe_pci(struct pci_dev *pdev,
 	if (err < 0)
 		return err;
 
+	err = pcim_iomap_regions(pdev, BIT(0), pci_name(pdev));
+	if (err)
+		return err;
+
 	info = (struct pwm_lpss_boardinfo *)id->driver_data;
-	lpwm = pwm_lpss_probe(&pdev->dev, &pdev->resource[0], info);
+	lpwm = pwm_lpss_probe(&pdev->dev, pcim_iomap_table(pdev)[0], info);
 	if (IS_ERR(lpwm))
 		return PTR_ERR(lpwm);
 
diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c
index 65154c0abab1..7bbbb7a9b578 100644
--- a/drivers/pwm/pwm-lpss-platform.c
+++ b/drivers/pwm/pwm-lpss-platform.c
@@ -21,16 +21,19 @@ static int pwm_lpss_probe_platform(struct platform_device *pdev)
 	const struct pwm_lpss_boardinfo *info;
 	const struct acpi_device_id *id;
 	struct pwm_lpss_chip *lpwm;
-	struct resource *r;
+	void __iomem *base;
 
 	id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev);
 	if (!id)
 		return -ENODEV;
 
 	info = (const struct pwm_lpss_boardinfo *)id->driver_data;
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
-	lpwm = pwm_lpss_probe(&pdev->dev, r, info);
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	lpwm = pwm_lpss_probe(&pdev->dev, base, info);
 	if (IS_ERR(lpwm))
 		return PTR_ERR(lpwm);
 
diff --git a/drivers/pwm/pwm-lpss.c b/drivers/pwm/pwm-lpss.c
index 74a296cb1af0..a20915459809 100644
--- a/drivers/pwm/pwm-lpss.c
+++ b/drivers/pwm/pwm-lpss.c
@@ -243,7 +243,7 @@ static const struct pwm_ops pwm_lpss_ops = {
 	.owner = THIS_MODULE,
 };
 
-struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
+struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
 				     const struct pwm_lpss_boardinfo *info)
 {
 	struct pwm_lpss_chip *lpwm;
@@ -258,10 +258,7 @@ struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
 	if (!lpwm)
 		return ERR_PTR(-ENOMEM);
 
-	lpwm->regs = devm_ioremap_resource(dev, r);
-	if (IS_ERR(lpwm->regs))
-		return ERR_CAST(lpwm->regs);
-
+	lpwm->regs = base;
 	lpwm->info = info;
 
 	c = lpwm->info->clk_rate;
diff --git a/drivers/pwm/pwm-lpss.h b/drivers/pwm/pwm-lpss.h
index 9ea5b145a353..c344921b2cab 100644
--- a/drivers/pwm/pwm-lpss.h
+++ b/drivers/pwm/pwm-lpss.h
@@ -38,7 +38,7 @@ extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info;
 extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info;
 extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info;
 
-struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
+struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
 				     const struct pwm_lpss_boardinfo *info);
 
 #endif	/* __PWM_LPSS_H */
-- 
2.35.1