[PATCH 0/3] Convert omap_hsmmc to use common devicetree parsing code.

[PATCH 0/3] Convert omap_hsmmc to use common devicetree parsing code.

[NeilBrown]

This is another resend with mmc_gpio_set_cd_isr() now returning
void and being EXPORTed.

I included
	WARN_ON(ctx->cd_gpio_isr);
to guard against misuse.

My goal is to get omap_hsmmc to use the common code for parsing of,
particularly so that I can set "cap-power-off-card", which omap_hsmmc
doesn't explicitly report.

Thanks,
NeilBrown

P.S. Sorry for delay - I've been travelling.

---

NeilBrown (3):
      mmc: core: Allow host driver to provide isr for card-detect interrupts.
      mmc: omap_hsmmc: use slot-gpio library for gpio support.
      mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.


 drivers/mmc/core/slot-gpio.c  |   18 +++++++
 drivers/mmc/host/omap_hsmmc.c |  100 +++++++++--------------------------------
 include/linux/mmc/slot-gpio.h |    2 +
 3 files changed, 40 insertions(+), 80 deletions(-)

--
Signature

[PATCH 2/3] mmc: omap_hsmmc: use slot-gpio library for gpio support.

[NeilBrown]

Using the common code removes some code duplication, and
makes it easier to switch to using mmc_of_parse() which
will remove more duplication.

This uses the new mmc_gpio_request_cd_isr to provide a non-standard
interrupt service routine for card-detect interrupts.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mmc/host/omap_hsmmc.c |   67 ++++++++---------------------------------
 1 file changed, 13 insertions(+), 54 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 537cba8f1de1..08c65e01b547 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -36,6 +36,7 @@
 #include <linux/mmc/host.h>
 #include <linux/mmc/core.h>
 #include <linux/mmc/mmc.h>
+#include <linux/mmc/slot-gpio.h>
 #include <linux/io.h>
 #include <linux/irq.h>
 #include <linux/gpio.h>
@@ -251,28 +252,22 @@ static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host);
 static int omap_hsmmc_card_detect(struct device *dev)
 {
 	struct omap_hsmmc_host *host = dev_get_drvdata(dev);
-	struct omap_hsmmc_platform_data *mmc = host->pdata;
 
-	/* NOTE: assumes card detect signal is active-low */
-	return !gpio_get_value_cansleep(mmc->switch_pin);
+	return mmc_gpio_get_cd(host->mmc);
 }
 
 static int omap_hsmmc_get_wp(struct device *dev)
 {
 	struct omap_hsmmc_host *host = dev_get_drvdata(dev);
-	struct omap_hsmmc_platform_data *mmc = host->pdata;
 
-	/* NOTE: assumes write protect signal is active-high */
-	return gpio_get_value_cansleep(mmc->gpio_wp);
+	return mmc_gpio_get_ro(host->mmc);
 }
 
 static int omap_hsmmc_get_cover_state(struct device *dev)
 {
 	struct omap_hsmmc_host *host = dev_get_drvdata(dev);
-	struct omap_hsmmc_platform_data *mmc = host->pdata;
 
-	/* NOTE: assumes card detect signal is active-low */
-	return !gpio_get_value_cansleep(mmc->switch_pin);
+	return mmc_gpio_get_cd(host->mmc);
 }
 
 #ifdef CONFIG_REGULATOR
@@ -439,7 +434,10 @@ static inline int omap_hsmmc_have_reg(void)
 
 #endif
 
-static int omap_hsmmc_gpio_init(struct omap_hsmmc_host *host,
+static irqreturn_t omap_hsmmc_detect(int irq, void *dev_id);
+
+static int omap_hsmmc_gpio_init(struct mmc_host *mmc,
+				struct omap_hsmmc_host *host,
 				struct omap_hsmmc_platform_data *pdata)
 {
 	int ret;
@@ -452,46 +450,24 @@ static int omap_hsmmc_gpio_init(struct omap_hsmmc_host *host,
 			host->card_detect = omap_hsmmc_card_detect;
 		host->card_detect_irq =
 				gpio_to_irq(pdata->switch_pin);
-		ret = gpio_request(pdata->switch_pin, "mmc_cd");
+		mmc_gpio_set_cd_isr(mmc, omap_hsmmc_detect);
+		ret = mmc_gpio_request_cd(mmc, pdata->switch_pin, 0);
 		if (ret)
 			return ret;
-		ret = gpio_direction_input(pdata->switch_pin);
-		if (ret)
-			goto err_free_sp;
 	} else {
 		pdata->switch_pin = -EINVAL;
 	}
 
 	if (gpio_is_valid(pdata->gpio_wp)) {
 		host->get_ro = omap_hsmmc_get_wp;
-		ret = gpio_request(pdata->gpio_wp, "mmc_wp");
-		if (ret)
-			goto err_free_cd;
-		ret = gpio_direction_input(pdata->gpio_wp);
+		ret = mmc_gpio_request_ro(mmc, pdata->gpio_wp);
 		if (ret)
-			goto err_free_wp;
+			return ret;
 	} else {
 		pdata->gpio_wp = -EINVAL;
 	}
 
 	return 0;
-
-err_free_wp:
-	gpio_free(pdata->gpio_wp);
-err_free_cd:
-	if (gpio_is_valid(pdata->switch_pin))
-err_free_sp:
-		gpio_free(pdata->switch_pin);
-	return ret;
-}
-
-static void omap_hsmmc_gpio_free(struct omap_hsmmc_host *host,
-				 struct omap_hsmmc_platform_data *pdata)
-{
-	if (gpio_is_valid(pdata->gpio_wp))
-		gpio_free(pdata->gpio_wp);
-	if (gpio_is_valid(pdata->switch_pin))
-		gpio_free(pdata->switch_pin);
 }
 
 /*
@@ -2066,7 +2042,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	host->next_data.cookie = 1;
 	host->pbias_enabled = 0;
 
-	ret = omap_hsmmc_gpio_init(host, pdata);
+	ret = omap_hsmmc_gpio_init(mmc, host, pdata);
 	if (ret)
 		goto err_gpio;
 
@@ -2197,20 +2173,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	mmc->ocr_avail = mmc_pdata(host)->ocr_mask;
 
-	/* Request IRQ for card detect */
-	if (host->card_detect_irq) {
-		ret = devm_request_threaded_irq(&pdev->dev,
-						host->card_detect_irq,
-						NULL, omap_hsmmc_detect,
-					   IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-					   mmc_hostname(mmc), host);
-		if (ret) {
-			dev_err(mmc_dev(host->mmc),
-				"Unable to grab MMC CD IRQ\n");
-			goto err_irq_cd;
-		}
-	}
-
 	omap_hsmmc_disable_irq(host);
 
 	/*
@@ -2249,7 +2211,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 err_slot_name:
 	mmc_remove_host(mmc);
-err_irq_cd:
 	if (host->use_reg)
 		omap_hsmmc_reg_put(host);
 err_irq:
@@ -2262,7 +2223,6 @@ err_irq:
 	if (host->dbclk)
 		clk_disable_unprepare(host->dbclk);
 err1:
-	omap_hsmmc_gpio_free(host, pdata);
 err_gpio:
 	mmc_free_host(mmc);
 err:
@@ -2288,7 +2248,6 @@ static int omap_hsmmc_remove(struct platform_device *pdev)
 	if (host->dbclk)
 		clk_disable_unprepare(host->dbclk);
 
-	omap_hsmmc_gpio_free(host, host->pdata);
 	mmc_free_host(host->mmc);
 
 	return 0;

[PATCH 1/3] mmc: core: Allow host driver to provide isr for card-detect interrupts.

[NeilBrown]

One of the reasons omap_hsmmc doesn't use the slot-gpio library
is that it has some non-standard functionality in the card-detect
interrupt service routine.

To make it possible for omap_hsmmc (and maybe others) to be converted
to use slot-gpio, add 'mmc_gpio_request_cd_isr' which provide an
alternate isr to be register by the slot-gpio code.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mmc/core/slot-gpio.c  |   18 +++++++++++++++++-
 include/linux/mmc/slot-gpio.h |    2 ++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c
index 1a3edbd47719..27117ba47073 100644
--- a/drivers/mmc/core/slot-gpio.c
+++ b/drivers/mmc/core/slot-gpio.c
@@ -25,6 +25,7 @@ struct mmc_gpio {
 	struct gpio_desc *cd_gpio;
 	bool override_ro_active_level;
 	bool override_cd_active_level;
+	irqreturn_t (*cd_gpio_isr)(int irq, void *dev_id);
 	char *ro_label;
 	char cd_label[0];
 };
@@ -136,8 +137,10 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
 		irq = -EINVAL;
 
 	if (irq >= 0) {
+		if (!ctx->cd_gpio_isr)
+			ctx->cd_gpio_isr = mmc_gpio_cd_irqt;
 		ret = devm_request_threaded_irq(host->parent, irq,
-			NULL, mmc_gpio_cd_irqt,
+			NULL, ctx->cd_gpio_isr,
 			IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 			ctx->cd_label, host);
 		if (ret < 0)
@@ -151,6 +154,19 @@ void mmc_gpiod_request_cd_irq(struct mmc_host *host)
 }
 EXPORT_SYMBOL(mmc_gpiod_request_cd_irq);
 
+/* Register an alternate interrupt service routine for
+ * the card-detect GPIO.
+ */
+void mmc_gpio_set_cd_isr(struct mmc_host *host,
+			 irqreturn_t (*isr)(int irq, void *dev_id))
+{
+	struct mmc_gpio *ctx = host->slot.handler_priv;
+
+	WARN_ON(ctx->cd_gpio_isr);
+	ctx->cd_gpio_isr = isr;
+}
+EXPORT_SYMBOL(mmc_gpio_set_cd_isr);
+
 /**
  * mmc_gpio_request_cd - request a gpio for card-detection
  * @host: mmc host
diff --git a/include/linux/mmc/slot-gpio.h b/include/linux/mmc/slot-gpio.h
index 4a36d6954631..3945a8c9d3cb 100644
--- a/include/linux/mmc/slot-gpio.h
+++ b/include/linux/mmc/slot-gpio.h
@@ -26,6 +26,8 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id,
 int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id,
 			 unsigned int idx, bool override_active_level,
 			 unsigned int debounce, bool *gpio_invert);
+void mmc_gpio_set_cd_isr(struct mmc_host *host,
+			 irqreturn_t (*isr)(int irq, void *dev_id));
 void mmc_gpiod_request_cd_irq(struct mmc_host *host);
 
 #endif

[PATCH 3/3] mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.

[NeilBrown]

This ensures that all standard options are available to hsmmc,
In particular, I need cap-power-off-card.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mmc/host/omap_hsmmc.c |   33 ++++++++-------------------------
 1 file changed, 8 insertions(+), 25 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 08c65e01b547..f84cfb01716d 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1929,13 +1929,6 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 {
 	struct omap_hsmmc_platform_data *pdata;
 	struct device_node *np = dev->of_node;
-	u32 bus_width, max_freq;
-	int cd_gpio, wp_gpio;
-
-	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
-	wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
-	if (cd_gpio == -EPROBE_DEFER || wp_gpio == -EPROBE_DEFER)
-		return ERR_PTR(-EPROBE_DEFER);
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -1944,34 +1937,20 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 	if (of_find_property(np, "ti,dual-volt", NULL))
 		pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
 
-	pdata->switch_pin = cd_gpio;
-	pdata->gpio_wp = wp_gpio;
+	pdata->switch_pin = -EINVAL;
+	pdata->gpio_wp = -EINVAL;
 
 	if (of_find_property(np, "ti,non-removable", NULL)) {
 		pdata->nonremovable = true;
 		pdata->no_regulator_off_init = true;
 	}
-	of_property_read_u32(np, "bus-width", &bus_width);
-	if (bus_width == 4)
-		pdata->caps |= MMC_CAP_4_BIT_DATA;
-	else if (bus_width == 8)
-		pdata->caps |= MMC_CAP_8_BIT_DATA;
 
 	if (of_find_property(np, "ti,needs-special-reset", NULL))
 		pdata->features |= HSMMC_HAS_UPDATED_RESET;
 
-	if (!of_property_read_u32(np, "max-frequency", &max_freq))
-		pdata->max_freq = max_freq;
-
 	if (of_find_property(np, "ti,needs-special-hs-handling", NULL))
 		pdata->features |= HSMMC_HAS_HSPE_SUPPORT;
 
-	if (of_find_property(np, "keep-power-in-suspend", NULL))
-		pdata->pm_caps |= MMC_PM_KEEP_POWER;
-
-	if (of_find_property(np, "enable-sdio-wakeup", NULL))
-		pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
-
 	return pdata;
 }
 #else
@@ -2029,6 +2008,10 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	ret = mmc_of_parse(mmc);
+	if (ret)
+		goto err1;
+
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
 	host->pdata	= pdata;
@@ -2057,7 +2040,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	if (pdata->max_freq > 0)
 		mmc->f_max = pdata->max_freq;
-	else
+	else if (mmc->f_max == 0)
 		mmc->f_max = OMAP_MMC_MAX_CLOCK;
 
 	spin_lock_init(&host->irq_lock);
@@ -2111,7 +2094,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	if (mmc_pdata(host)->nonremovable)
 		mmc->caps |= MMC_CAP_NONREMOVABLE;
 
-	mmc->pm_caps = mmc_pdata(host)->pm_caps;
+	mmc->pm_caps |= mmc_pdata(host)->pm_caps;
 
 	omap_hsmmc_conf_bus_power(host);
 

Re: [PATCH 0/3] Convert omap_hsmmc to use common devicetree parsing code.

[Ulf Hansson]

On 12 January 2015 at 20:23, NeilBrown <neilb@suse.de> wrote:
> This is another resend with mmc_gpio_set_cd_isr() now returning
> void and being EXPORTed.
>
> I included
>         WARN_ON(ctx->cd_gpio_isr);
> to guard against misuse.
>
> My goal is to get omap_hsmmc to use the common code for parsing of,
> particularly so that I can set "cap-power-off-card", which omap_hsmmc
> doesn't explicitly report.
>
> Thanks,
> NeilBrown
>
> P.S. Sorry for delay - I've been travelling.
>
> ---
>
> NeilBrown (3):
>       mmc: core: Allow host driver to provide isr for card-detect interrupts.
>       mmc: omap_hsmmc: use slot-gpio library for gpio support.
>       mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.
>
>
>  drivers/mmc/core/slot-gpio.c  |   18 +++++++
>  drivers/mmc/host/omap_hsmmc.c |  100 +++++++++--------------------------------
>  include/linux/mmc/slot-gpio.h |    2 +
>  3 files changed, 40 insertions(+), 80 deletions(-)
>


Thanks! Applied for next.

Kind regards
Uffe

[PATCH 0/3] Convert omap_hsmmc to use common devicetree parsing code.

[NeilBrown]

This is a resend against latest
  git://git.linaro.org/people/ulf.hansson/mmc next

with requested changes.

My goal is to get omap_hsmmc to use the common code for parsing of,
particularly so that I can set "cap-power-off-card", which omap_hsmmc
doesn't explicitly report.

Thanks,
NeilBrown



---

NeilBrown (3):
      mmc: core: Allow host driver to provide isr for card-detect interrupts.
      mmc: omap_hsmmc: use slot-gpio library for gpio support.
      mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.


 drivers/mmc/core/slot-gpio.c  |   20 ++++++++
 drivers/mmc/host/omap_hsmmc.c |  100 +++++++++--------------------------------
 include/linux/mmc/slot-gpio.h |    2 +
 3 files changed, 43 insertions(+), 79 deletions(-)

--
Signature

[PATCH 3/3] mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.

[NeilBrown]

This ensures that all standard options are available to hsmmc,
In particular, I need cap-power-off-card.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mmc/host/omap_hsmmc.c |   33 ++++++++-------------------------
 1 file changed, 8 insertions(+), 25 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 149cc252fcbd..36cd73342afc 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1931,13 +1931,6 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 {
 	struct omap_hsmmc_platform_data *pdata;
 	struct device_node *np = dev->of_node;
-	u32 bus_width, max_freq;
-	int cd_gpio, wp_gpio;
-
-	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
-	wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
-	if (cd_gpio == -EPROBE_DEFER || wp_gpio == -EPROBE_DEFER)
-		return ERR_PTR(-EPROBE_DEFER);
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -1946,34 +1939,20 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 	if (of_find_property(np, "ti,dual-volt", NULL))
 		pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
 
-	pdata->switch_pin = cd_gpio;
-	pdata->gpio_wp = wp_gpio;
+	pdata->switch_pin = -EINVAL;
+	pdata->gpio_wp = -EINVAL;
 
 	if (of_find_property(np, "ti,non-removable", NULL)) {
 		pdata->nonremovable = true;
 		pdata->no_regulator_off_init = true;
 	}
-	of_property_read_u32(np, "bus-width", &bus_width);
-	if (bus_width == 4)
-		pdata->caps |= MMC_CAP_4_BIT_DATA;
-	else if (bus_width == 8)
-		pdata->caps |= MMC_CAP_8_BIT_DATA;
 
 	if (of_find_property(np, "ti,needs-special-reset", NULL))
 		pdata->features |= HSMMC_HAS_UPDATED_RESET;
 
-	if (!of_property_read_u32(np, "max-frequency", &max_freq))
-		pdata->max_freq = max_freq;
-
 	if (of_find_property(np, "ti,needs-special-hs-handling", NULL))
 		pdata->features |= HSMMC_HAS_HSPE_SUPPORT;
 
-	if (of_find_property(np, "keep-power-in-suspend", NULL))
-		pdata->pm_caps |= MMC_PM_KEEP_POWER;
-
-	if (of_find_property(np, "enable-sdio-wakeup", NULL))
-		pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
-
 	return pdata;
 }
 #else
@@ -2031,6 +2010,10 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	ret = mmc_of_parse(mmc);
+	if (ret)
+		goto err1;
+
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
 	host->pdata	= pdata;
@@ -2059,7 +2042,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	if (pdata->max_freq > 0)
 		mmc->f_max = pdata->max_freq;
-	else
+	else if (mmc->f_max == 0)
 		mmc->f_max = OMAP_MMC_MAX_CLOCK;
 
 	spin_lock_init(&host->irq_lock);
@@ -2113,7 +2096,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	if (mmc_pdata(host)->nonremovable)
 		mmc->caps |= MMC_CAP_NONREMOVABLE;
 
-	mmc->pm_caps = mmc_pdata(host)->pm_caps;
+	mmc->pm_caps |= mmc_pdata(host)->pm_caps;
 
 	omap_hsmmc_conf_bus_power(host);
 

[PATCH v2 0/3] mmc: omap_hsmmc: make more use of mmc library functionality

[NeilBrown]

This is resend, rebased on
  git://git.linaro.org/people/ulf.hansson/mmc.git  next

and so should apply to 3.19-rc1.

omap_hsmmc currently duplicates some work that can be done for
it by common code, and consequently does not benefit from extra
functionality in that common code.

In particular, mmc_of_parse and the slot-gpio library are not used.

This set of patches allows omap_hsmmc to use that common
functionality, and benefit from any extra devicetree parsing
that it performs.

The one awkward part of this change is that omap_hsmmc has an
interrupt handler for 'card detect' which does more than the
common code.
I see three options:
 1 - move that functionality into common code
 2 - discard that functionality
 3 - allow the common code to be configured to use a device-specific
     card detect interrupt.

This series implements '3'.  I suspect a mix of '1' and '2' would
be a better choice but I know none of the history or justification
for those differences.

My preference would be for this series to be applied (if there are
no other issues) and if there are opinions about effecting '1' or '2',
they can be done with subsequent patches.

Thanks,
NeilBrown


---

NeilBrown (3):
      mmc: omap_hsmmc: remove prepare/complete system suspend support.
      mmc: omap_hsmmc: use slot-gpio library for gpio support.
      mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.


 drivers/mmc/core/slot-gpio.c           |   24 +++++
 drivers/mmc/host/omap_hsmmc.c          |  150 +++++---------------------------
 include/linux/mmc/slot-gpio.h          |    2 
 include/linux/platform_data/mmc-omap.h |    4 -
 4 files changed, 47 insertions(+), 133 deletions(-)

--
Signature

[PATCH 3/3] mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.

[NeilBrown]

This ensures that all standard options are available to hsmmc,
In particular, I need cap-power-off-card.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mmc/host/omap_hsmmc.c |   33 ++++++++-------------------------
 1 file changed, 8 insertions(+), 25 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 32514b648e3c..1bfacc59e3bf 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1931,13 +1931,6 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 {
 	struct omap_hsmmc_platform_data *pdata;
 	struct device_node *np = dev->of_node;
-	u32 bus_width, max_freq;
-	int cd_gpio, wp_gpio;
-
-	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
-	wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
-	if (cd_gpio == -EPROBE_DEFER || wp_gpio == -EPROBE_DEFER)
-		return ERR_PTR(-EPROBE_DEFER);
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -1946,34 +1939,20 @@ static struct omap_hsmmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 	if (of_find_property(np, "ti,dual-volt", NULL))
 		pdata->controller_flags |= OMAP_HSMMC_SUPPORTS_DUAL_VOLT;
 
-	pdata->switch_pin = cd_gpio;
-	pdata->gpio_wp = wp_gpio;
+	pdata->switch_pin = -EINVAL;
+	pdata->gpio_wp = -EINVAL;
 
 	if (of_find_property(np, "ti,non-removable", NULL)) {
 		pdata->nonremovable = true;
 		pdata->no_regulator_off_init = true;
 	}
-	of_property_read_u32(np, "bus-width", &bus_width);
-	if (bus_width == 4)
-		pdata->caps |= MMC_CAP_4_BIT_DATA;
-	else if (bus_width == 8)
-		pdata->caps |= MMC_CAP_8_BIT_DATA;
 
 	if (of_find_property(np, "ti,needs-special-reset", NULL))
 		pdata->features |= HSMMC_HAS_UPDATED_RESET;
 
-	if (!of_property_read_u32(np, "max-frequency", &max_freq))
-		pdata->max_freq = max_freq;
-
 	if (of_find_property(np, "ti,needs-special-hs-handling", NULL))
 		pdata->features |= HSMMC_HAS_HSPE_SUPPORT;
 
-	if (of_find_property(np, "keep-power-in-suspend", NULL))
-		pdata->pm_caps |= MMC_PM_KEEP_POWER;
-
-	if (of_find_property(np, "enable-sdio-wakeup", NULL))
-		pdata->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
-
 	return pdata;
 }
 #else
@@ -2031,6 +2010,10 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	ret = mmc_of_parse(mmc);
+	if (ret)
+		goto err1;
+
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
 	host->pdata	= pdata;
@@ -2059,7 +2042,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	if (pdata->max_freq > 0)
 		mmc->f_max = pdata->max_freq;
-	else
+	else if (mmc->f_max == 0)
 		mmc->f_max = OMAP_MMC_MAX_CLOCK;
 
 	spin_lock_init(&host->irq_lock);
@@ -2113,7 +2096,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	if (mmc_pdata(host)->nonremovable)
 		mmc->caps |= MMC_CAP_NONREMOVABLE;
 
-	mmc->pm_caps = mmc_pdata(host)->pm_caps;
+	mmc->pm_caps |= mmc_pdata(host)->pm_caps;
 
 	omap_hsmmc_conf_bus_power(host);
 

[PATCH 0/3] mmc: omap_hsmmc: make more use of mmc library functionality

[NeilBrown]

omap_hsmmc currently duplicates some work that can be done for
it by common code, and consequently does not benefit from extra
functionality in that common code.

In particular, mmc_of_parse and the slot-gpio library are not used.

This set of patches allows omap_hsmmc to use that common
functionality, and benefit from any extra devicetree parsing
that it performs.

The one awkward part of this change is that omap_hsmmc has an
interrupt handler for 'card detect' which does more than the
common code.
I see three options:
 1 - move that functionality into common code
 2 - discard that functionality
 3 - allow the common code to be configured to use a device-specific
     card detect interrupt.

This series implements '3'.  I suspect a mix of '1' and '2' would
be a better choice but I know no of the history or justification
for those differences.

My preference would be for this series to be applied (if there are
no other issues) and if there are opinions about effecting '1' or '2',
they can be done with subsequent patches.

Thanks,
NeilBrown


---

NeilBrown (3):
      mmc: omap_hsmmc: remove prepare/complete system suspend support.
      mmc: omap_hsmmc: use slot-gpio library for gpio support.
      mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.


 drivers/mmc/core/slot-gpio.c           |   21 ++++
 drivers/mmc/host/omap_hsmmc.c          |  158 +++++---------------------------
 include/linux/mmc/slot-gpio.h          |    2 
 include/linux/platform_data/mmc-omap.h |    4 -
 4 files changed, 47 insertions(+), 138 deletions(-)

--
Signature

[PATCH 3/3] mmc: omap_hsmmc: use mmc_of_parse to parse common mmc configuration.

[NeilBrown]

This ensures that all standard options are available to hsmmc,
In particular, I need cap-power-off-card.

Signed-off-by: NeilBrown <neilb@suse.de>
---
 drivers/mmc/host/omap_hsmmc.c |   33 ++++++++-------------------------
 1 file changed, 8 insertions(+), 25 deletions(-)

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 3fe02cf077ec..06362c1ee31d 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1903,13 +1903,6 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 {
 	struct omap_mmc_platform_data *pdata;
 	struct device_node *np = dev->of_node;
-	u32 bus_width, max_freq;
-	int cd_gpio, wp_gpio;
-
-	cd_gpio = of_get_named_gpio(np, "cd-gpios", 0);
-	wp_gpio = of_get_named_gpio(np, "wp-gpios", 0);
-	if (cd_gpio == -EPROBE_DEFER || wp_gpio == -EPROBE_DEFER)
-		return ERR_PTR(-EPROBE_DEFER);
 
 	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 	if (!pdata)
@@ -1920,34 +1913,20 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
 
 	/* This driver only supports 1 slot */
 	pdata->nr_slots = 1;
-	pdata->slots[0].switch_pin = cd_gpio;
-	pdata->slots[0].gpio_wp = wp_gpio;
+	pdata->slots[0].switch_pin = -EINVAL;
+	pdata->slots[0].gpio_wp = -EINVAL;
 
 	if (of_find_property(np, "ti,non-removable", NULL)) {
 		pdata->slots[0].nonremovable = true;
 		pdata->slots[0].no_regulator_off_init = true;
 	}
-	of_property_read_u32(np, "bus-width", &bus_width);
-	if (bus_width == 4)
-		pdata->slots[0].caps |= MMC_CAP_4_BIT_DATA;
-	else if (bus_width == 8)
-		pdata->slots[0].caps |= MMC_CAP_8_BIT_DATA;
 
 	if (of_find_property(np, "ti,needs-special-reset", NULL))
 		pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
 
-	if (!of_property_read_u32(np, "max-frequency", &max_freq))
-		pdata->max_freq = max_freq;
-
 	if (of_find_property(np, "ti,needs-special-hs-handling", NULL))
 		pdata->slots[0].features |= HSMMC_HAS_HSPE_SUPPORT;
 
-	if (of_find_property(np, "keep-power-in-suspend", NULL))
-		pdata->slots[0].pm_caps |= MMC_PM_KEEP_POWER;
-
-	if (of_find_property(np, "enable-sdio-wakeup", NULL))
-		pdata->slots[0].pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
-
 	return pdata;
 }
 #else
@@ -2014,6 +1993,10 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	if (ret)
 		goto err1;
 
+	ret = mmc_of_parse(mmc);
+	if (ret)
+		goto err1;
+
 	host		= mmc_priv(mmc);
 	host->mmc	= mmc;
 	host->pdata	= pdata;
@@ -2039,7 +2022,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 
 	if (pdata->max_freq > 0)
 		mmc->f_max = pdata->max_freq;
-	else
+	else if (mmc->f_max == 0)
 		mmc->f_max = OMAP_MMC_MAX_CLOCK;
 
 	spin_lock_init(&host->irq_lock);
@@ -2093,7 +2076,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev)
 	if (mmc_slot(host).nonremovable)
 		mmc->caps |= MMC_CAP_NONREMOVABLE;
 
-	mmc->pm_caps = mmc_slot(host).pm_caps;
+	mmc->pm_caps |= mmc_slot(host).pm_caps;
 
 	omap_hsmmc_conf_bus_power(host);