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irqchip/starfive: Use devm_ interfaces to simplify resource release

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Use devm_ interfaces to simplify resource release. Make clock and reset get
optional as they are not used on the JHB100 SoC. Replace pr_ logging with
dev_* logging. Use __free(kfree) cleanup attribute to auto-free irqc on
error paths

Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260416064751.632138-4-changhuang.liang@starfivetech.com
This commit is contained in:
Changhuang Liang 2026-04-15 23:47:49 -07:00 committed by Thomas Gleixner
parent ac2005bba8
commit 2f59ca1854
1 changed files with 20 additions and 57 deletions
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77
drivers/irqchip/irq-starfive-jhb100-intc.c
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@ -7,16 +7,15 @@
* Author: Changhuang Liang <changhuang.liang@starfivetech.com> * Author: Changhuang Liang <changhuang.liang@starfivetech.com>
*/ */
#define pr_fmt(fmt) "irq-starfive-jhb100: " fmt
#include <linux/bitops.h> #include <linux/bitops.h>
#include <linux/cleanup.h>
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/irqchip.h> #include <linux/irqchip.h>
#include <linux/irqchip/chained_irq.h> #include <linux/irqchip/chained_irq.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <linux/of_irq.h> #include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/reset.h> #include <linux/reset.h>
#include <linux/spinlock.h> #include <linux/spinlock.h>
@ -117,85 +116,49 @@ static void starfive_intc_irq_handler(struct irq_desc *desc)
static int starfive_intc_probe(struct platform_device *pdev, struct device_node *parent) static int starfive_intc_probe(struct platform_device *pdev, struct device_node *parent)
{ {
struct device_node *intc = pdev->dev.of_node; struct device_node *intc = pdev->dev.of_node;
struct starfive_irq_chip *irqc;
struct reset_control *rst; struct reset_control *rst;
struct clk *clk; struct clk *clk;
int parent_irq; int parent_irq;
int ret;
irqc = kzalloc_obj(*irqc); struct starfive_irq_chip *irqc __free(kfree) = kzalloc_obj(*irqc);
if (!irqc) if (!irqc)
return -ENOMEM; return -ENOMEM;
irqc->base = of_iomap(intc, 0); irqc->base = devm_platform_ioremap_resource(pdev, 0);
if (!irqc->base) { if (!irqc->base)
pr_err("Unable to map registers\n"); return dev_err_probe(&pdev->dev, -ENXIO, "unable to map registers\n");
ret = -ENXIO;
goto err_free;
}
rst = of_reset_control_get_exclusive(intc, NULL); rst = devm_reset_control_get_optional_exclusive_deasserted(&pdev->dev, NULL);
if (IS_ERR(rst)) { if (IS_ERR(rst))
pr_err("Unable to get reset control %pe\n", rst); return dev_err_probe(&pdev->dev, PTR_ERR(rst),
ret = PTR_ERR(rst); "Unable to get and deassert reset control\n");
goto err_unmap;
}
clk = of_clk_get(intc, 0); clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
if (IS_ERR(clk)) { if (IS_ERR(clk))
pr_err("Unable to get clock %pe\n", clk); return dev_err_probe(&pdev->dev, PTR_ERR(clk), "Unable to get and enable clock\n");
ret = PTR_ERR(clk);
goto err_reset_put;
}
ret = reset_control_deassert(rst);
if (ret)
goto err_clk_put;
ret = clk_prepare_enable(clk);
if (ret)
goto err_reset_assert;
raw_spin_lock_init(&irqc->lock); raw_spin_lock_init(&irqc->lock);
irqc->domain = irq_domain_create_linear(of_fwnode_handle(intc), STARFIVE_INTC_SRC_IRQ_NUM, irqc->domain = irq_domain_create_linear(of_fwnode_handle(intc), STARFIVE_INTC_SRC_IRQ_NUM,
&starfive_intc_domain_ops, irqc); &starfive_intc_domain_ops, irqc);
if (!irqc->domain) { if (!irqc->domain)
pr_err("Unable to create IRQ domain\n"); return dev_err_probe(&pdev->dev, -EINVAL, "Unable to create IRQ domain\n");
ret = -EINVAL;
goto err_clk_disable;
}
parent_irq = of_irq_get(intc, 0); parent_irq = of_irq_get(intc, 0);
if (parent_irq < 0) { if (parent_irq < 0) {
pr_err("Failed to get main IRQ: %d\n", parent_irq); irq_domain_remove(irqc->domain);
ret = parent_irq; return dev_err_probe(&pdev->dev, parent_irq, "Failed to get main IRQ\n");
goto err_remove_domain;
} }
irq_set_chained_handler_and_data(parent_irq, starfive_intc_irq_handler, irq_set_chained_handler_and_data(parent_irq, starfive_intc_irq_handler,
irqc); irqc);
pr_info("Interrupt controller register, nr_irqs %d\n", dev_info(&pdev->dev, "Interrupt controller register, nr_irqs %d\n",
STARFIVE_INTC_SRC_IRQ_NUM); STARFIVE_INTC_SRC_IRQ_NUM);
retain_and_null_ptr(irqc);
return 0; return 0;
err_remove_domain:
irq_domain_remove(irqc->domain);
err_clk_disable:
clk_disable_unprepare(clk);
err_reset_assert:
reset_control_assert(rst);
err_clk_put:
clk_put(clk);
err_reset_put:
reset_control_put(rst);
err_unmap:
iounmap(irqc->base);
err_free:
kfree(irqc);
return ret;
} }
IRQCHIP_PLATFORM_DRIVER_BEGIN(starfive_intc) IRQCHIP_PLATFORM_DRIVER_BEGIN(starfive_intc)