On Wed, 17 Aug 2011, Simon Horman wrote:
> Make use of per-source irq handles if the
> platform (data) has multiple irq sources.
>
> Also, as suggested by Guennadi Liakhovetski,
> add and use defines the index or irqs in platform data.
>
> Cc: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
> Cc: Magnus Damm <magnus.damm@xxxxxxxxx>
> Signed-off-by: Simon Horman <horms@xxxxxxxxxxxx>
>
> ---
>
> v4
> * As suggested by Guennadi Liakhovetski:
> - Correct inverted values of SH_MOBILE_SDHI_IRQ_SDCARD and
> SH_MOBILE_SDHI_IRQ_CARD_DETECT
>
> v3
> * Update for changes to "mmc: tmio: Provide separate interrupt handlers"
> * As suggested by Guennadi Liakhovetski:
> - Merge in patch "mmc: sdhi: Add defines for platform irq indexes"
> - Use an enum instead of defines for irq indexes
>
> v2
> * Update for changes to "mmc: tmio: Provide separate interrupt handlers"
> * Make use of defines provided by
> "mmc: sdhi: Add defines for platform irq indexes"
> * As suggested by Guennadi Liakhovetski:
> - Don't use a loop to initialise irq handlers, the unrolled version
> is easier on the eyes (and exactly the same number of lines of code!)
> ---
> drivers/mmc/host/sh_mobile_sdhi.c | 60 ++++++++++++++++++++++-------------
> include/linux/mmc/sh_mobile_sdhi.h | 7 ++++
> 2 files changed, 45 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
> index 774f643..619df30 100644
> --- a/drivers/mmc/host/sh_mobile_sdhi.c
> +++ b/drivers/mmc/host/sh_mobile_sdhi.c
> @@ -96,7 +96,9 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
> struct sh_mobile_sdhi_info *p = pdev->dev.platform_data;
> struct tmio_mmc_host *host;
> char clk_name[8];
> - int i, irq, ret;
> + int irq, ret;
> + irqreturn_t (*f)(int irq, void *devid);
> + bool multi_irq = false;
>
> priv = kzalloc(sizeof(struct sh_mobile_sdhi), GFP_KERNEL);
> if (priv == NULL) {
> @@ -153,27 +155,33 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
> if (ret < 0)
> goto eprobe;
>
> - for (i = 0; i < 3; i++) {
> - irq = platform_get_irq(pdev, i);
> - if (irq < 0) {
> - if (i) {
> - continue;
> - } else {
> - ret = irq;
> - goto eirq;
> - }
> - }
> - ret = request_irq(irq, tmio_mmc_irq, 0,
> + irq = platform_get_irq(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
> + if (irq >= 0) {
> + multi_irq = true;
> + ret = request_irq(irq, tmio_mmc_sdio_irq, 0,
> dev_name(&pdev->dev), host);
> - if (ret) {
> - while (i--) {
> - irq = platform_get_irq(pdev, i);
> - if (irq >= 0)
> - free_irq(irq, host);
> - }
> - goto eirq;
> - }
> + if (ret)
> + goto eirq_sdio;
> }
> +
> + ret = irq = platform_get_irq(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
> + if (irq >= 0) {
> + multi_irq = true;
> + ret = request_irq(irq, tmio_mmc_sdcard_irq, 0,
> + dev_name(&pdev->dev), host);
> + if (ret)
> + goto eirq_sdcard;
> + } else if (multi_irq)
> + goto eirq_sdcard;
> +
> + ret = irq = platform_get_irq(pdev, SH_MOBILE_SDHI_IRQ_CARD_DETECT);
> + if (irq < 0)
> + goto eirq_card_detect;
> + f = multi_irq ? tmio_mmc_card_detect_irq : tmio_mmc_irq;
> + ret = request_irq(irq, f, 0, dev_name(&pdev->dev), host);
> + if (ret)
> + goto eirq_card_detect;
> +
I still don't see why a multi-IRQ configuration without a card-detect IRQ
like
static struct resource sdhi_resources[] = {
[0] = {
.name = "SDHI2",
...,
},
[1 + SH_MOBILE_SDHI_IRQ_SDCARD] = {
.start = ...,
.flags = IORESOURCE_IRQ,
},
[1 + SH_MOBILE_SDHI_IRQ_SDIO] = {
.start = ...,
.flags = IORESOURCE_IRQ,
},
};
should be invalid. Especially since we actually want to avoid using the
controller card-detect IRQ for power efficiency and use a GPIO instead.
Thanks
Guennadi
> dev_info(&pdev->dev, "%s base at 0x%08lx clock rate %u MHz\n",
> mmc_hostname(host->mmc), (unsigned long)
> (platform_get_resource(pdev,IORESOURCE_MEM, 0)->start),
> @@ -181,7 +189,15 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
>
> return ret;
>
> -eirq:
> +eirq_card_detect:
> + irq = platform_get_irq(pdev, SH_MOBILE_SDHI_IRQ_SDCARD);
> + if (irq >= 0)
> + free_irq(irq, host);
> +eirq_sdcard:
> + irq = platform_get_irq(pdev, SH_MOBILE_SDHI_IRQ_SDIO);
> + if (irq >= 0)
> + free_irq(irq, host);
> +eirq_sdio:
> tmio_mmc_host_remove(host);
> eprobe:
> clk_disable(priv->clk);
> @@ -203,7 +219,7 @@ static int sh_mobile_sdhi_remove(struct platform_device *pdev)
>
> tmio_mmc_host_remove(host);
>
> - for (i = 0; i < 3; i++) {
> + for (i = 0; i < SH_MOBILE_SDHI_IRQ_MAX; i++) {
> irq = platform_get_irq(pdev, i);
> if (irq >= 0)
> free_irq(irq, host);
> diff --git a/include/linux/mmc/sh_mobile_sdhi.h b/include/linux/mmc/sh_mobile_sdhi.h
> index bd50b36..80d3629 100644
> --- a/include/linux/mmc/sh_mobile_sdhi.h
> +++ b/include/linux/mmc/sh_mobile_sdhi.h
> @@ -3,6 +3,13 @@
>
> #include <linux/types.h>
>
> +enum {
> + SH_MOBILE_SDHI_IRQ_CARD_DETECT = 0,
> + SH_MOBILE_SDHI_IRQ_SDCARD,
> + SH_MOBILE_SDHI_IRQ_SDIO,
> + SH_MOBILE_SDHI_IRQ_MAX
> +};
> +
> struct platform_device;
> struct tmio_mmc_data;
>
> --
> 1.7.5.4
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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