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Miller" , linux-kernel@vger.kernel.org (open list) Subject: [PATCH] crypto: caam: simplify probe resource and IRQ handling Date: Thu, 30 Jul 2026 13:47:22 -0700 Message-ID: <20260730204722.1101805-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Convert the interrupt acquisition from irq_of_parse_and_map() to platform_get_irq(), which resolves the IRQ from the device's interrupts property via of_irq_get(). Flip the error check from testing for zero to testing for a negative errno, and drop the now-unused caam_jr_irq_dispose_mapping() callback and its devm_add_action_or_reset() cleanup, since platform_get_irq() manages the mapping internally. Replace the open-coded platform_get_resource() plus devm_ioremap() sequence with devm_platform_ioremap_resource(), which fetches the resource, requests the region and maps it in one call. Each fsl,sec-*-job-ring node has a distinct 0x10000 reg region and interrupts property, so the region reservation added by devm_ioremap_resource() is exclusive and does not introduce overlap failures. Assisted-by: opencode:hy3-free Signed-off-by: Rosen Penev --- drivers/crypto/caam/jr.c | 46 +++++++++++----------------------------- 1 file changed, 12 insertions(+), 34 deletions(-) diff --git a/drivers/crypto/caam/jr.c b/drivers/crypto/caam/jr.c index bddeaaaca487..239469f6882e 100644 --- a/drivers/crypto/caam/jr.c +++ b/drivers/crypto/caam/jr.c @@ -574,23 +574,25 @@ static int caam_jr_init(struct device *dev) return error; } -static void caam_jr_irq_dispose_mapping(void *data) -{ - irq_dispose_mapping((unsigned long)data); -} - /* * Probe routine for each detected JobR subsystem. */ static int caam_jr_probe(struct platform_device *pdev) { struct device *jrdev; - struct device_node *nprop; - struct caam_job_ring __iomem *ctrl; struct caam_drv_private_jr *jrpriv; static int total_jobrs; - struct resource *r; + void __iomem *ctrl; int error; + int irq; + + ctrl = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(ctrl)) + return PTR_ERR(ctrl); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; jrdev = &pdev->dev; jrpriv = devm_kzalloc(jrdev, sizeof(*jrpriv), GFP_KERNEL); @@ -602,22 +604,7 @@ static int caam_jr_probe(struct platform_device *pdev) /* save ring identity relative to detection */ jrpriv->ridx = total_jobrs++; - nprop = pdev->dev.of_node; - /* Get configuration properties from device tree */ - /* First, get register page */ - r = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!r) { - dev_err(jrdev, "platform_get_resource() failed\n"); - return -ENOMEM; - } - - ctrl = devm_ioremap(jrdev, r->start, resource_size(r)); - if (!ctrl) { - dev_err(jrdev, "devm_ioremap() failed\n"); - return -ENOMEM; - } - - jrpriv->rregs = (struct caam_job_ring __iomem __force *)ctrl; + jrpriv->rregs = ctrl; error = dma_set_mask_and_coherent(jrdev, caam_get_dma_mask(jrdev)); if (error) { @@ -647,16 +634,7 @@ static int caam_jr_probe(struct platform_device *pdev) } /* Identify the interrupt */ - jrpriv->irq = irq_of_parse_and_map(nprop, 0); - if (!jrpriv->irq) { - dev_err(jrdev, "irq_of_parse_and_map failed\n"); - return -EINVAL; - } - - error = devm_add_action_or_reset(jrdev, caam_jr_irq_dispose_mapping, - (void *)(unsigned long)jrpriv->irq); - if (error) - return error; + jrpriv->irq = irq; /* Now do the platform independent part */ error = caam_jr_init(jrdev); /* now turn on hardware */ -- 2.55.0