linux-kernel - [[PATCH v2] 4/9] pwm: move dwc memory alloc to own function

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Message-Id: <20220725212140.741644-4-ben.dooks@sifive.com>
Date:   Mon, 25 Jul 2022 22:21:35 +0100
From:   Ben Dooks <ben.dooks@...ive.com>
To:     linux-pwm@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee.jones@...aro.org>,
        u.kleine-koenig@...gutronix.de,
        Thierry Reding <thierry.reding@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Greentime Hu <greentime.hu@...ive.com>,
        Ben Dooks <ben.dooks@...ive.com>
Subject: [[PATCH v2] 4/9] pwm: move dwc memory alloc to own function

In preparation for adding other bus support, move the allocation
of the pwm struct out of the main driver code.

Signed-off-by: Ben Dooks <ben.dooks@...ive.com>
---
 drivers/pwm/pwm-dwc.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/pwm/pwm-dwc.c b/drivers/pwm/pwm-dwc.c
index c706ef9a7ba1..61f11e0a9319 100644
--- a/drivers/pwm/pwm-dwc.c
+++ b/drivers/pwm/pwm-dwc.c
@@ -196,13 +196,29 @@ static const struct pwm_ops dwc_pwm_ops = {
 	.owner = THIS_MODULE,
 };
 
+static struct dwc_pwm *dwc_pwm_alloc(struct device *dev)
+{
+	struct dwc_pwm *dwc;
+
+	dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
+	if (!dwc)
+		return NULL;
+
+	dwc->chip.dev = dev;
+	dwc->chip.ops = &dwc_pwm_ops;
+	dwc->chip.npwm = DWC_TIMERS_TOTAL;
+
+	dev_set_drvdata(dev, dwc);
+	return dwc;
+}
+
 static int dwc_pwm_probe(struct pci_dev *pci, const struct pci_device_id *id)
 {
 	struct device *dev = &pci->dev;
 	struct dwc_pwm *dwc;
 	int ret;
 
-	dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
+	dwc = dwc_pwm_alloc(dev);
 	if (!dwc)
 		return -ENOMEM;
 
@@ -226,12 +242,6 @@ static int dwc_pwm_probe(struct pci_dev *pci, const struct pci_device_id *id)
 		return -ENOMEM;
 	}
 
-	pci_set_drvdata(pci, dwc);
-
-	dwc->chip.dev = dev;
-	dwc->chip.ops = &dwc_pwm_ops;
-	dwc->chip.npwm = DWC_TIMERS_TOTAL;
-
 	ret = pwmchip_add(&dwc->chip);
 	if (ret)
 		return ret;
-- 
2.35.1