linux/drivers/mfd/tc6387xb.c
Mark Brown 0848c94fb4 mfd: core: Push irqdomain mapping out into devices
Currently the MFD core supports remapping MFD cell interrupts using an
irqdomain but only if the MFD is being instantiated using device tree
and only if the device tree bindings use the pattern of registering IPs
in the device tree with compatible properties.  This will be actively
harmful for drivers which support non-DT platforms and use this pattern
for their DT bindings as it will mean that the core will silently change
remapping behaviour and it is also limiting for drivers which don't do
DT with this particular pattern.  There is also a potential fragility if
there are interrupts not associated with MFD cells and all the cells are
omitted from the device tree for some reason.

Instead change the code to take an IRQ domain as an optional argument,
allowing drivers to take the decision about the parent domain for their
interrupts.  The one current user of this feature is ab8500-core, it has
the domain lookup pushed out into the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-09-15 23:22:04 +02:00

244 lines
5.5 KiB
C

/*
* Toshiba TC6387XB support
* Copyright (c) 2005 Ian Molton
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This file contains TC6387XB base support.
*
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tmio.h>
#include <linux/mfd/tc6387xb.h>
#include <linux/slab.h>
enum {
TC6387XB_CELL_MMC,
};
struct tc6387xb {
void __iomem *scr;
struct clk *clk32k;
struct resource rscr;
};
static struct resource tc6387xb_mmc_resources[] = {
{
.start = 0x800,
.end = 0x9ff,
.flags = IORESOURCE_MEM,
},
{
.start = 0,
.end = 0,
.flags = IORESOURCE_IRQ,
},
};
/*--------------------------------------------------------------------------*/
#ifdef CONFIG_PM
static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
{
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
if (pdata && pdata->suspend)
pdata->suspend(dev);
clk_disable(tc6387xb->clk32k);
return 0;
}
static int tc6387xb_resume(struct platform_device *dev)
{
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
clk_enable(tc6387xb->clk32k);
if (pdata && pdata->resume)
pdata->resume(dev);
tmio_core_mmc_resume(tc6387xb->scr + 0x200, 0,
tc6387xb_mmc_resources[0].start & 0xfffe);
return 0;
}
#else
#define tc6387xb_suspend NULL
#define tc6387xb_resume NULL
#endif
/*--------------------------------------------------------------------------*/
static void tc6387xb_mmc_pwr(struct platform_device *mmc, int state)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
tmio_core_mmc_pwr(tc6387xb->scr + 0x200, 0, state);
}
static void tc6387xb_mmc_clk_div(struct platform_device *mmc, int state)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
tmio_core_mmc_clk_div(tc6387xb->scr + 0x200, 0, state);
}
static int tc6387xb_mmc_enable(struct platform_device *mmc)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
clk_enable(tc6387xb->clk32k);
tmio_core_mmc_enable(tc6387xb->scr + 0x200, 0,
tc6387xb_mmc_resources[0].start & 0xfffe);
return 0;
}
static int tc6387xb_mmc_disable(struct platform_device *mmc)
{
struct platform_device *dev = to_platform_device(mmc->dev.parent);
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
clk_disable(tc6387xb->clk32k);
return 0;
}
static struct tmio_mmc_data tc6387xb_mmc_data = {
.hclk = 24000000,
.set_pwr = tc6387xb_mmc_pwr,
.set_clk_div = tc6387xb_mmc_clk_div,
};
/*--------------------------------------------------------------------------*/
static struct mfd_cell tc6387xb_cells[] = {
[TC6387XB_CELL_MMC] = {
.name = "tmio-mmc",
.enable = tc6387xb_mmc_enable,
.disable = tc6387xb_mmc_disable,
.platform_data = &tc6387xb_mmc_data,
.pdata_size = sizeof(tc6387xb_mmc_data),
.num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
.resources = tc6387xb_mmc_resources,
},
};
static int __devinit tc6387xb_probe(struct platform_device *dev)
{
struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
struct resource *iomem, *rscr;
struct clk *clk32k;
struct tc6387xb *tc6387xb;
int irq, ret;
iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
if (!iomem) {
return -EINVAL;
}
tc6387xb = kzalloc(sizeof *tc6387xb, GFP_KERNEL);
if (!tc6387xb)
return -ENOMEM;
ret = platform_get_irq(dev, 0);
if (ret >= 0)
irq = ret;
else
goto err_no_irq;
clk32k = clk_get(&dev->dev, "CLK_CK32K");
if (IS_ERR(clk32k)) {
ret = PTR_ERR(clk32k);
goto err_no_clk;
}
rscr = &tc6387xb->rscr;
rscr->name = "tc6387xb-core";
rscr->start = iomem->start;
rscr->end = iomem->start + 0xff;
rscr->flags = IORESOURCE_MEM;
ret = request_resource(iomem, rscr);
if (ret)
goto err_resource;
tc6387xb->scr = ioremap(rscr->start, resource_size(rscr));
if (!tc6387xb->scr) {
ret = -ENOMEM;
goto err_ioremap;
}
tc6387xb->clk32k = clk32k;
platform_set_drvdata(dev, tc6387xb);
if (pdata && pdata->enable)
pdata->enable(dev);
printk(KERN_INFO "Toshiba tc6387xb initialised\n");
ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
ARRAY_SIZE(tc6387xb_cells), iomem, irq, NULL);
if (!ret)
return 0;
iounmap(tc6387xb->scr);
err_ioremap:
release_resource(&tc6387xb->rscr);
err_resource:
clk_put(clk32k);
err_no_clk:
err_no_irq:
kfree(tc6387xb);
return ret;
}
static int __devexit tc6387xb_remove(struct platform_device *dev)
{
struct tc6387xb *tc6387xb = platform_get_drvdata(dev);
mfd_remove_devices(&dev->dev);
iounmap(tc6387xb->scr);
release_resource(&tc6387xb->rscr);
clk_disable(tc6387xb->clk32k);
clk_put(tc6387xb->clk32k);
platform_set_drvdata(dev, NULL);
kfree(tc6387xb);
return 0;
}
static struct platform_driver tc6387xb_platform_driver = {
.driver = {
.name = "tc6387xb",
},
.probe = tc6387xb_probe,
.remove = __devexit_p(tc6387xb_remove),
.suspend = tc6387xb_suspend,
.resume = tc6387xb_resume,
};
module_platform_driver(tc6387xb_platform_driver);
MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Ian Molton");
MODULE_ALIAS("platform:tc6387xb");