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| author | Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> | 2021-12-21 17:53:21 +0000 |
|---|---|---|
| committer | Wolfram Sang <wsa@kernel.org> | 2022-01-03 10:17:24 +0100 |
| commit | aab799e44ce3953ac56c42721742c9cd9208b2f4 (patch) | |
| tree | fa60f980db23152b06dc5c40a948a4ced2a3c3e4 /drivers/i2c | |
| parent | c3b2f911ac11892b672df7829becf28d3a830073 (diff) | |
| download | lwn-aab799e44ce3953ac56c42721742c9cd9208b2f4.tar.gz lwn-aab799e44ce3953ac56c42721742c9cd9208b2f4.zip | |
i2c: sh_mobile: Use platform_get_irq_optional() to get the interrupt
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.
In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq_optional() for DT users only.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/busses/i2c-sh_mobile.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/drivers/i2c/busses/i2c-sh_mobile.c b/drivers/i2c/busses/i2c-sh_mobile.c index 7b8caf172851..9754849dbb23 100644 --- a/drivers/i2c/busses/i2c-sh_mobile.c +++ b/drivers/i2c/busses/i2c-sh_mobile.c @@ -830,20 +830,38 @@ static void sh_mobile_i2c_release_dma(struct sh_mobile_i2c_data *pd) static int sh_mobile_i2c_hook_irqs(struct platform_device *dev, struct sh_mobile_i2c_data *pd) { - struct resource *res; - resource_size_t n; + struct device_node *np = dev_of_node(&dev->dev); int k = 0, ret; - while ((res = platform_get_resource(dev, IORESOURCE_IRQ, k))) { - for (n = res->start; n <= res->end; n++) { - ret = devm_request_irq(&dev->dev, n, sh_mobile_i2c_isr, - 0, dev_name(&dev->dev), pd); + if (np) { + int irq; + + while ((irq = platform_get_irq_optional(dev, k)) != -ENXIO) { + if (irq < 0) + return irq; + ret = devm_request_irq(&dev->dev, irq, sh_mobile_i2c_isr, + 0, dev_name(&dev->dev), pd); if (ret) { - dev_err(&dev->dev, "cannot request IRQ %pa\n", &n); + dev_err(&dev->dev, "cannot request IRQ %d\n", irq); return ret; } + k++; + }; + } else { + struct resource *res; + resource_size_t n; + + while ((res = platform_get_resource(dev, IORESOURCE_IRQ, k))) { + for (n = res->start; n <= res->end; n++) { + ret = devm_request_irq(&dev->dev, n, sh_mobile_i2c_isr, + 0, dev_name(&dev->dev), pd); + if (ret) { + dev_err(&dev->dev, "cannot request IRQ %pa\n", &n); + return ret; + } + } + k++; } - k++; } return k > 0 ? 0 : -ENOENT; |