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Date: Fri, 23 May 2014 08:48:00 +0200
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
Chris Ball <chris@...ntf.net>
Cc: Russell King <rmk+kernel@....linux.org.uk>,
linux-mmc <linux-mmc@...r.kernel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdhci-dove: use mmc_of_parse() and remove
card_tasklet CD handler
On 23 May 2014 00:16, Sebastian Hesselbarth
<sebastian.hesselbarth@...il.com> wrote:
> Commit f8ec589b86f6
> "mmc: sdhci-dove: allow GPIOs to be used for card detection on Dove"
> added a gpio based card detect interrupt handler that was hooked up
> into card_tasket.
>
> Commit 3560db8e247a
> "mmc: sdhci: push card_tasklet into threaded irq handler"
> now removed that very card_tasklet causing sdhci-dove to fail on build
> with:
> drivers/mmc/host/sdhci-dove.c: In function 'sdhci_dove_carddetect_irq':
> drivers/mmc/host/sdhci-dove.c:42:24: error: 'struct sdhci_host' has no member named 'card_tasklet'
>
> To fix both the build error and get a working gpio card detection without
> card_tasklet, replace sdhci_get_of_property() with more recent
> mmc_of_parse(). It takes care of gpio-based card detect passed through DT
> already and allows to remove the offending code sections dealing with
> removed card_tasklet.
>
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Thanks Sebastian!
Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
Chris, can you pick this up?
> ---
> This patch is based on todays mmc-next and fixes a build error there.
>
> Cc: Chris Ball <chris@...ntf.net>
> Cc: Ulf Hansson <ulf.hansson@...aro.org>
> Cc: Russell King <rmk+kernel@....linux.org.uk>
> Cc: linux-mmc@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> ---
> drivers/mmc/host/sdhci-dove.c | 74 +++----------------------------------------
> 1 file changed, 5 insertions(+), 69 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-dove.c b/drivers/mmc/host/sdhci-dove.c
> index 0d315f4496c8..e6278ec007d7 100644
> --- a/drivers/mmc/host/sdhci-dove.c
> +++ b/drivers/mmc/host/sdhci-dove.c
> @@ -21,28 +21,17 @@
>
> #include <linux/clk.h>
> #include <linux/err.h>
> -#include <linux/gpio.h>
> #include <linux/io.h>
> #include <linux/mmc/host.h>
> #include <linux/module.h>
> #include <linux/of.h>
> -#include <linux/of_gpio.h>
>
> #include "sdhci-pltfm.h"
>
> struct sdhci_dove_priv {
> struct clk *clk;
> - int gpio_cd;
> };
>
> -static irqreturn_t sdhci_dove_carddetect_irq(int irq, void *data)
> -{
> - struct sdhci_host *host = data;
> -
> - tasklet_schedule(&host->card_tasklet);
> - return IRQ_HANDLED;
> -}
> -
> static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
> {
> u16 ret;
> @@ -60,8 +49,6 @@ static u16 sdhci_dove_readw(struct sdhci_host *host, int reg)
>
> static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
> {
> - struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> - struct sdhci_dove_priv *priv = pltfm_host->priv;
> u32 ret;
>
> ret = readl(host->ioaddr + reg);
> @@ -71,14 +58,6 @@ static u32 sdhci_dove_readl(struct sdhci_host *host, int reg)
> /* Mask the support for 3.0V */
> ret &= ~SDHCI_CAN_VDD_300;
> break;
> - case SDHCI_PRESENT_STATE:
> - if (gpio_is_valid(priv->gpio_cd)) {
> - if (gpio_get_value(priv->gpio_cd) == 0)
> - ret |= SDHCI_CARD_PRESENT;
> - else
> - ret &= ~SDHCI_CARD_PRESENT;
> - }
> - break;
> }
> return ret;
> }
> @@ -117,28 +96,9 @@ static int sdhci_dove_probe(struct platform_device *pdev)
>
> priv->clk = devm_clk_get(&pdev->dev, NULL);
>
> - if (pdev->dev.of_node) {
> - priv->gpio_cd = of_get_named_gpio(pdev->dev.of_node,
> - "cd-gpios", 0);
> - } else {
> - priv->gpio_cd = -EINVAL;
> - }
> -
> - if (gpio_is_valid(priv->gpio_cd)) {
> - ret = gpio_request(priv->gpio_cd, "sdhci-cd");
> - if (ret) {
> - dev_err(&pdev->dev, "card detect gpio request failed: %d\n",
> - ret);
> - return ret;
> - }
> - gpio_direction_input(priv->gpio_cd);
> - }
> -
> host = sdhci_pltfm_init(pdev, &sdhci_dove_pdata, 0);
> - if (IS_ERR(host)) {
> - ret = PTR_ERR(host);
> - goto err_sdhci_pltfm_init;
> - }
> + if (IS_ERR(host))
> + return PTR_ERR(host);
>
> pltfm_host = sdhci_priv(host);
> pltfm_host->priv = priv;
> @@ -146,39 +106,20 @@ static int sdhci_dove_probe(struct platform_device *pdev)
> if (!IS_ERR(priv->clk))
> clk_prepare_enable(priv->clk);
>
> - sdhci_get_of_property(pdev);
> + ret = mmc_of_parse(host->mmc);
> + if (ret)
> + goto err_sdhci_add;
>
> ret = sdhci_add_host(host);
> if (ret)
> goto err_sdhci_add;
>
> - /*
> - * We must request the IRQ after sdhci_add_host(), as the tasklet only
> - * gets setup in sdhci_add_host() and we oops.
> - */
> - if (gpio_is_valid(priv->gpio_cd)) {
> - ret = request_irq(gpio_to_irq(priv->gpio_cd),
> - sdhci_dove_carddetect_irq,
> - IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
> - mmc_hostname(host->mmc), host);
> - if (ret) {
> - dev_err(&pdev->dev, "card detect irq request failed: %d\n",
> - ret);
> - goto err_request_irq;
> - }
> - }
> -
> return 0;
>
> -err_request_irq:
> - sdhci_remove_host(host, 0);
> err_sdhci_add:
> if (!IS_ERR(priv->clk))
> clk_disable_unprepare(priv->clk);
> sdhci_pltfm_free(pdev);
> -err_sdhci_pltfm_init:
> - if (gpio_is_valid(priv->gpio_cd))
> - gpio_free(priv->gpio_cd);
> return ret;
> }
>
> @@ -190,11 +131,6 @@ static int sdhci_dove_remove(struct platform_device *pdev)
>
> sdhci_pltfm_unregister(pdev);
>
> - if (gpio_is_valid(priv->gpio_cd)) {
> - free_irq(gpio_to_irq(priv->gpio_cd), host);
> - gpio_free(priv->gpio_cd);
> - }
> -
> if (!IS_ERR(priv->clk))
> clk_disable_unprepare(priv->clk);
>
> --
> 1.9.1
>
--
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