Commit 2f7510c6 authored by Russell King's avatar Russell King
Browse files

MFD: ucb1x00-core: add handling for ucb1x00 reset 



Provide a way to handle the software controlled ucb1x00 reset signal
from the ucb1x00-core driver without having to code platform specifics
into these drivers.

Acked-by: default avatarJochen Friedrich <jochen@scram.de>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent c364ff47

drivers/mfd/ucb1x00-core.c

+13 −4
Original line number Diff line number Diff line
@@ -530,13 +530,17 @@ static struct class ucb1x00_class = { 


static int ucb1x00_probe(struct mcp *mcp)

{

	struct ucb1x00 *ucb;

	struct ucb1x00_plat_data *pdata = mcp->attached_device.platform_data;

	struct ucb1x00_driver *drv;

	struct ucb1x00_plat_data *pdata;

	struct ucb1x00 *ucb;

	unsigned int id;

	int ret = -ENODEV;

	int temp;



	/* Tell the platform to deassert the UCB1x00 reset */

	if (pdata && pdata->reset)

		pdata->reset(UCB_RST_PROBE);



	mcp_enable(mcp);

	id = mcp_reg_read(mcp, UCB_ID);
@@ -550,7 +554,6 @@ static int ucb1x00_probe(struct mcp *mcp) 
	if (!ucb)

		goto err_disable;



	pdata = mcp->attached_device.platform_data;

	ucb->dev.class = &ucb1x00_class;

	ucb->dev.parent = &mcp->attached_device;

	dev_set_name(&ucb->dev, "ucb1x00");
@@ -606,7 +609,7 @@ static int ucb1x00_probe(struct mcp *mcp) 
	}

	mutex_unlock(&ucb1x00_mutex);



	goto out;

	return ret;



 err_irq:

	free_irq(ucb->irq, ucb);
@@ -618,11 +621,14 @@ static int ucb1x00_probe(struct mcp *mcp) 
 err_disable:

	mcp_disable(mcp);

 out:

	if (pdata && pdata->reset)

		pdata->reset(UCB_RST_PROBE_FAIL);

	return ret;

}



static void ucb1x00_remove(struct mcp *mcp)

{

	struct ucb1x00_plat_data *pdata = mcp->attached_device.platform_data;

	struct ucb1x00 *ucb = mcp_get_drvdata(mcp);

	struct list_head *l, *n;

	int ret;
@@ -643,6 +649,9 @@ static void ucb1x00_remove(struct mcp *mcp) 


	free_irq(ucb->irq, ucb);

	device_unregister(&ucb->dev);



	if (pdata && pdata->reset)

		pdata->reset(UCB_RST_REMOVE);

}



int ucb1x00_register_driver(struct ucb1x00_driver *drv)

include/linux/mfd/ucb1x00.h

+7 −0
Original line number Diff line number Diff line
@@ -104,7 +104,14 @@ 
#define UCB_MODE_DYN_VFLAG_ENA	(1 << 12)

#define UCB_MODE_AUD_OFF_CAN	(1 << 13)



enum ucb1x00_reset {

	UCB_RST_PROBE,

	UCB_RST_REMOVE,

	UCB_RST_PROBE_FAIL,

};



struct ucb1x00_plat_data {

	void			(*reset)(enum ucb1x00_reset);

	int			gpio_base;

};