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author | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
commit | 4961e02f1999e1c3468c09b2669c94d7c3ae82a8 (patch) | |
tree | 44c15abb09d7ba5e17a9aba95ee246648b1c1a8a /drivers/mfd/wm8350-core.c | |
parent | d14a0ebda7d3daede1a99c01527affb9ceaa4c22 (diff) | |
parent | a3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff) | |
download | linux-fsl-qoriq-4961e02f1999e1c3468c09b2669c94d7c3ae82a8.tar.xz |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'drivers/mfd/wm8350-core.c')
-rw-r--r-- | drivers/mfd/wm8350-core.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c index 9a970bd..bd75807 100644 --- a/drivers/mfd/wm8350-core.c +++ b/drivers/mfd/wm8350-core.c @@ -339,7 +339,6 @@ EXPORT_SYMBOL_GPL(wm8350_reg_unlock); int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref) { u16 reg, result = 0; - int tries = 5; if (channel < WM8350_AUXADC_AUX1 || channel > WM8350_AUXADC_TEMP) return -EINVAL; @@ -363,12 +362,13 @@ int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref) reg |= 1 << channel | WM8350_AUXADC_POLL; wm8350_reg_write(wm8350, WM8350_DIGITISER_CONTROL_1, reg); - do { - schedule_timeout_interruptible(1); - reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1); - } while ((reg & WM8350_AUXADC_POLL) && --tries); + /* We ignore the result of the completion and just check for a + * conversion result, allowing us to soldier on if the IRQ + * infrastructure is not set up for the chip. */ + wait_for_completion_timeout(&wm8350->auxadc_done, msecs_to_jiffies(5)); - if (!tries) + reg = wm8350_reg_read(wm8350, WM8350_DIGITISER_CONTROL_1); + if (reg & WM8350_AUXADC_POLL) dev_err(wm8350->dev, "adc chn %d read timeout\n", channel); else result = wm8350_reg_read(wm8350, @@ -385,6 +385,15 @@ int wm8350_read_auxadc(struct wm8350 *wm8350, int channel, int scale, int vref) } EXPORT_SYMBOL_GPL(wm8350_read_auxadc); +static irqreturn_t wm8350_auxadc_irq(int irq, void *irq_data) +{ + struct wm8350 *wm8350 = irq_data; + + complete(&wm8350->auxadc_done); + + return IRQ_HANDLED; +} + /* * Cache is always host endian. */ @@ -682,11 +691,22 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq, } mutex_init(&wm8350->auxadc_mutex); + init_completion(&wm8350->auxadc_done); ret = wm8350_irq_init(wm8350, irq, pdata); if (ret < 0) goto err; + if (wm8350->irq_base) { + ret = request_threaded_irq(wm8350->irq_base + + WM8350_IRQ_AUXADC_DATARDY, + NULL, wm8350_auxadc_irq, 0, + "auxadc", wm8350); + if (ret < 0) + dev_warn(wm8350->dev, + "Failed to request AUXADC IRQ: %d\n", ret); + } + if (pdata && pdata->init) { ret = pdata->init(wm8350); if (ret != 0) { @@ -736,6 +756,9 @@ void wm8350_device_exit(struct wm8350 *wm8350) platform_device_unregister(wm8350->gpio.pdev); platform_device_unregister(wm8350->codec.pdev); + if (wm8350->irq_base) + free_irq(wm8350->irq_base + WM8350_IRQ_AUXADC_DATARDY, wm8350); + wm8350_irq_exit(wm8350); kfree(wm8350->reg_cache); |