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platform/x86: intel_mid_powerbtn: Introduce driver data
This is preparatory patch to extend the driver in order to support other Intel MID platform. Here the new driver data structure is introduced with split of ->pbstat() callback. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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@ -26,6 +26,9 @@
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#include <linux/mfd/intel_msic.h>
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#include <linux/pm_wakeirq.h>
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#include <asm/cpu_device_id.h>
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#include <asm/intel-family.h>
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#define DRIVER_NAME "msic_power_btn"
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#define MSIC_PB_LEVEL (1 << 3) /* 1 - release, 0 - press */
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@ -36,33 +39,72 @@
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*/
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#define MSIC_PWRBTNM (1 << 0)
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static irqreturn_t mid_pb_isr(int irq, void *dev_id)
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struct mid_pb_ddata {
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struct device *dev;
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int irq;
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struct input_dev *input;
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int (*pbstat)(struct mid_pb_ddata *ddata, int *value);
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};
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static int mfld_pbstat(struct mid_pb_ddata *ddata, int *value)
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{
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struct input_dev *input = dev_id;
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struct input_dev *input = ddata->input;
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int ret;
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u8 pbstat;
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ret = intel_msic_reg_read(INTEL_MSIC_PBSTATUS, &pbstat);
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if (ret)
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return ret;
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dev_dbg(input->dev.parent, "PB_INT status= %d\n", pbstat);
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*value = !(pbstat & MSIC_PB_LEVEL);
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return 0;
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}
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static irqreturn_t mid_pb_isr(int irq, void *dev_id)
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{
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struct mid_pb_ddata *ddata = dev_id;
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struct input_dev *input = ddata->input;
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int value;
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int ret;
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ret = ddata->pbstat(ddata, &value);
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if (ret < 0) {
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dev_err(input->dev.parent, "Read error %d while reading"
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" MSIC_PB_STATUS\n", ret);
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} else {
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input_event(input, EV_KEY, KEY_POWER,
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!(pbstat & MSIC_PB_LEVEL));
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input_event(input, EV_KEY, KEY_POWER, value);
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input_sync(input);
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}
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return IRQ_HANDLED;
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}
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static struct mid_pb_ddata mfld_ddata = {
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.pbstat = mfld_pbstat,
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};
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#define ICPU(model, ddata) \
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{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_ANY, (kernel_ulong_t)&ddata }
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static const struct x86_cpu_id mid_pb_cpu_ids[] = {
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ICPU(INTEL_FAM6_ATOM_PENWELL, mfld_ddata),
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{}
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};
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static int mid_pb_probe(struct platform_device *pdev)
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{
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const struct x86_cpu_id *id;
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struct mid_pb_ddata *ddata;
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struct input_dev *input;
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int irq = platform_get_irq(pdev, 0);
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int error;
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id = x86_match_cpu(mid_pb_cpu_ids);
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if (!id)
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return -ENODEV;
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if (irq < 0)
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return -EINVAL;
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@ -77,8 +119,16 @@ static int mid_pb_probe(struct platform_device *pdev)
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input_set_capability(input, EV_KEY, KEY_POWER);
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ddata = (struct mid_pb_ddata *)id->driver_data;
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if (!ddata)
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return -ENODATA;
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ddata->dev = &pdev->dev;
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ddata->irq = irq;
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ddata->input = input;
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error = devm_request_threaded_irq(&pdev->dev, irq, NULL, mid_pb_isr,
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IRQF_ONESHOT, DRIVER_NAME, input);
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IRQF_ONESHOT, DRIVER_NAME, ddata);
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if (error) {
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dev_err(&pdev->dev, "Unable to request irq %d for MID power"
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"button\n", irq);
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@ -92,7 +142,7 @@ static int mid_pb_probe(struct platform_device *pdev)
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return error;
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}
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platform_set_drvdata(pdev, input);
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platform_set_drvdata(pdev, ddata);
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/*
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* SCU firmware might send power button interrupts to IA core before
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