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mfd: Add ASIC3 LED support 

Add LED support for the HTC ASIC3. Underlying support is provided by the mfd/asic3 and leds/leds-asic3 drivers. An example configuration is provided by the pxa/hx4700 platform.

Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Paul Parsons 2011-05-13 18:53:03 +00:00 committed by Samuel Ortiz
parent 7d9e7e9fbd
commit 13ca4f6610
1 changed files with 68 additions and 6 deletions
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74
drivers/mfd/asic3.c
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@ -88,19 +88,19 @@ struct asic3 {
static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset); static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
static inline void asic3_write_register(struct asic3 *asic, void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)
unsigned int reg, u32 value)
{ {
iowrite16(value, asic->mapping + iowrite16(value, asic->mapping +
(reg >> asic->bus_shift)); (reg >> asic->bus_shift));
} }
EXPORT_SYMBOL_GPL(asic3_write_register);
static inline u32 asic3_read_register(struct asic3 *asic, u32 asic3_read_register(struct asic3 *asic, unsigned int reg)
unsigned int reg)
{ {
return ioread16(asic->mapping + return ioread16(asic->mapping +
(reg >> asic->bus_shift)); (reg >> asic->bus_shift));
} }
EXPORT_SYMBOL_GPL(asic3_read_register);
static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set) static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set)
{ {
@ -784,7 +784,55 @@ static struct mfd_cell asic3_cell_mmc = {
.resources = asic3_mmc_resources, .resources = asic3_mmc_resources,
}; };
static const int clock_ledn[ASIC3_NUM_LEDS] = {
[0] = ASIC3_CLOCK_LED0,
[1] = ASIC3_CLOCK_LED1,
[2] = ASIC3_CLOCK_LED2,
};
static int asic3_leds_enable(struct platform_device *pdev)
{
const struct mfd_cell *cell = mfd_get_cell(pdev);
struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]);
return 0;
}
static int asic3_leds_disable(struct platform_device *pdev)
{
const struct mfd_cell *cell = mfd_get_cell(pdev);
struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
return 0;
}
static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
[0] = {
.name = "leds-asic3",
.id = 0,
.enable = asic3_leds_enable,
.disable = asic3_leds_disable,
},
[1] = {
.name = "leds-asic3",
.id = 1,
.enable = asic3_leds_enable,
.disable = asic3_leds_disable,
},
[2] = {
.name = "leds-asic3",
.id = 2,
.enable = asic3_leds_enable,
.disable = asic3_leds_disable,
},
};
static int __init asic3_mfd_probe(struct platform_device *pdev, static int __init asic3_mfd_probe(struct platform_device *pdev,
struct asic3_platform_data *pdata,
struct resource *mem) struct resource *mem)
{ {
struct asic3 *asic = platform_get_drvdata(pdev); struct asic3 *asic = platform_get_drvdata(pdev);
@ -822,9 +870,23 @@ static int __init asic3_mfd_probe(struct platform_device *pdev,
if (ret < 0) if (ret < 0)
goto out; goto out;
if (mem_sdio && (irq >= 0)) if (mem_sdio && (irq >= 0)) {
ret = mfd_add_devices(&pdev->dev, pdev->id, ret = mfd_add_devices(&pdev->dev, pdev->id,
&asic3_cell_mmc, 1, mem_sdio, irq); &asic3_cell_mmc, 1, mem_sdio, irq);
if (ret < 0)
goto out;
}
if (pdata->leds) {
int i;
for (i = 0; i < ASIC3_NUM_LEDS; ++i) {
asic3_cell_leds[i].platform_data = &pdata->leds[i];
asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]);
}
ret = mfd_add_devices(&pdev->dev, 0,
asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0);
}
out: out:
return ret; return ret;
@ -905,7 +967,7 @@ static int __init asic3_probe(struct platform_device *pdev)
*/ */
memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init)); memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
asic3_mfd_probe(pdev, mem); asic3_mfd_probe(pdev, pdata, mem);
dev_info(asic->dev, "ASIC3 Core driver\n"); dev_info(asic->dev, "ASIC3 Core driver\n");