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authorLee Jones <lee.jones@linaro.org>2013-02-12 15:04:09 +0000
committerLee Jones <lee.jones@linaro.org>2013-03-07 12:27:36 +0800
commitc0eda9aef1c0ef7bb2812b739ddf400405568bef (patch)
tree021e3a942f61d2a6ecc8df809c7f0397ffc0fa76 /drivers/mfd/ab8500-gpadc.c
parent5ff9090f3de360578a2a4f53812fcfce761bfaaa (diff)
downloadlinux-c0eda9aef1c0ef7bb2812b739ddf400405568bef.tar.gz
mfd: ab8500-core: Add ADC support for ab8540
Signed-off-by: Lee Jones <lee.jones@linaro.org> Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/ab8500-gpadc.c')
-rw-r--r--drivers/mfd/ab8500-gpadc.c67
1 files changed, 39 insertions, 28 deletions
diff --git a/drivers/mfd/ab8500-gpadc.c b/drivers/mfd/ab8500-gpadc.c
index 8673bf66f7d..fc8da4496e8 100644
--- a/drivers/mfd/ab8500-gpadc.c
+++ b/drivers/mfd/ab8500-gpadc.c
@@ -311,6 +311,12 @@ int ab8500_gpadc_read_raw(struct ab8500_gpadc *gpadc, u8 channel,
if (!gpadc)
return -ENODEV;
+ /* check if convertion is supported */
+ if ((gpadc->irq_sw < 0) && (conv_type == ADC_SW))
+ return -ENOTSUPP;
+ if ((gpadc->irq_hw < 0) && (conv_type == ADC_HW))
+ return -ENOTSUPP;
+
mutex_lock(&gpadc->ab8500_gpadc_lock);
/* Enable VTVout LDO this is required for GPADC */
pm_runtime_get_sync(gpadc->dev);
@@ -761,20 +767,12 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
}
gpadc->irq_sw = platform_get_irq_byname(pdev, "SW_CONV_END");
- if (gpadc->irq_sw < 0) {
- dev_err(gpadc->dev, "failed to get platform irq-%d\n",
- gpadc->irq_sw);
- ret = gpadc->irq_sw;
- goto fail;
- }
+ if (gpadc->irq_sw < 0)
+ dev_err(gpadc->dev, "failed to get platform sw_conv_end irq\n");
gpadc->irq_hw = platform_get_irq_byname(pdev, "HW_CONV_END");
- if (gpadc->irq_hw < 0) {
- dev_err(gpadc->dev, "failed to get platform irq-%d\n",
- gpadc->irq_hw);
- ret = gpadc->irq_hw;
- goto fail;
- }
+ if (gpadc->irq_hw < 0)
+ dev_err(gpadc->dev, "failed to get platform hw_conv_end irq\n");
gpadc->dev = &pdev->dev;
gpadc->parent = dev_get_drvdata(pdev->dev.parent);
@@ -784,21 +782,30 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
init_completion(&gpadc->ab8500_gpadc_complete);
/* Register interrupts */
- ret = request_threaded_irq(gpadc->irq_sw, NULL,
- ab8500_bm_gpadcconvend_handler,
- IRQF_NO_SUSPEND | IRQF_SHARED, "ab8500-gpadc-sw", gpadc);
- if (ret < 0) {
- dev_err(gpadc->dev, "Failed to register interrupt, irq: %d\n",
- gpadc->irq_sw);
- goto fail;
+ if (gpadc->irq_sw >= 0) {
+ ret = request_threaded_irq(gpadc->irq_sw, NULL,
+ ab8500_bm_gpadcconvend_handler,
+ IRQF_NO_SUSPEND | IRQF_SHARED, "ab8500-gpadc-sw",
+ gpadc);
+ if (ret < 0) {
+ dev_err(gpadc->dev,
+ "Failed to register interrupt irq: %d\n",
+ gpadc->irq_sw);
+ goto fail;
+ }
}
- ret = request_threaded_irq(gpadc->irq_hw, NULL,
- ab8500_bm_gpadcconvend_handler,
- IRQF_NO_SUSPEND | IRQF_SHARED, "ab8500-gpadc-hw", gpadc);
- if (ret < 0) {
- dev_err(gpadc->dev, "Failed to register interrupt, irq: %d\n",
- gpadc->irq_hw);
- goto fail;
+
+ if (gpadc->irq_hw >= 0) {
+ ret = request_threaded_irq(gpadc->irq_hw, NULL,
+ ab8500_bm_gpadcconvend_handler,
+ IRQF_NO_SUSPEND | IRQF_SHARED, "ab8500-gpadc-hw",
+ gpadc);
+ if (ret < 0) {
+ dev_err(gpadc->dev,
+ "Failed to register interrupt irq: %d\n",
+ gpadc->irq_hw);
+ goto fail_irq;
+ }
}
/* VTVout LDO used to power up ab8500-GPADC */
@@ -821,7 +828,9 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
ab8500_gpadc_read_calibration_data(gpadc);
list_add_tail(&gpadc->node, &ab8500_gpadc_list);
dev_dbg(gpadc->dev, "probe success\n");
+
return 0;
+
fail_irq:
free_irq(gpadc->irq_sw, gpadc);
free_irq(gpadc->irq_hw, gpadc);
@@ -838,8 +847,10 @@ static int ab8500_gpadc_remove(struct platform_device *pdev)
/* remove this gpadc entry from the list */
list_del(&gpadc->node);
/* remove interrupt - completion of Sw ADC conversion */
- free_irq(gpadc->irq_sw, gpadc);
- free_irq(gpadc->irq_hw, gpadc);
+ if (gpadc->irq_sw >= 0)
+ free_irq(gpadc->irq_sw, gpadc);
+ if (gpadc->irq_hw >= 0)
+ free_irq(gpadc->irq_hw, gpadc);
pm_runtime_get_sync(gpadc->dev);
pm_runtime_disable(gpadc->dev);