forked from Minki/linux
mfd: ti_tscadc: deal with partial activation
Fix the mfd device in the case where a subdevice might not be activated. Signed-off-by: Pantelis Antoniou <panto@antoniou-consulting.com> Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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c80df483f6
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@ -107,11 +107,14 @@ static int ti_tscadc_probe(struct platform_device *pdev)
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of_property_read_u32(node, "ti,adc-channels", &adc_channels);
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total_channels = tsc_wires + adc_channels;
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if (total_channels > 8) {
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dev_err(&pdev->dev, "Number of i/p channels more than 8\n");
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return -EINVAL;
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}
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if (total_channels == 0) {
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dev_err(&pdev->dev, "Need atleast one channel.\n");
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return -EINVAL;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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@ -202,28 +205,37 @@ static int ti_tscadc_probe(struct platform_device *pdev)
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ctrl |= CNTRLREG_TSCSSENB;
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tscadc_writel(tscadc, REG_CTRL, ctrl);
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tscadc->used_cells = 0;
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tscadc->tsc_cell = -1;
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tscadc->adc_cell = -1;
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/* TSC Cell */
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cell = &tscadc->cells[TSC_CELL];
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cell->name = "tsc";
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cell->of_compatible = "ti,am3359-tsc";
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cell->platform_data = &tscadc;
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cell->pdata_size = sizeof(tscadc);
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if (tsc_wires > 0) {
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tscadc->tsc_cell = tscadc->used_cells;
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cell = &tscadc->cells[tscadc->used_cells++];
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cell->name = "tsc";
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cell->of_compatible = "ti,am3359-tsc";
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cell->platform_data = &tscadc;
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cell->pdata_size = sizeof(tscadc);
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}
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/* ADC Cell */
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cell = &tscadc->cells[ADC_CELL];
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cell->name = "tiadc";
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cell->of_compatible = "ti,am3359-adc";
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cell->platform_data = &tscadc;
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cell->pdata_size = sizeof(tscadc);
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if (adc_channels > 0) {
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tscadc->adc_cell = tscadc->used_cells;
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cell = &tscadc->cells[tscadc->used_cells++];
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cell->name = "tiadc";
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cell->of_compatible = "ti,am3359-adc";
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cell->platform_data = &tscadc;
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cell->pdata_size = sizeof(tscadc);
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}
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err = mfd_add_devices(&pdev->dev, pdev->id, tscadc->cells,
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TSCADC_CELLS, NULL, 0, NULL);
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tscadc->used_cells, NULL, 0, NULL);
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if (err < 0)
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goto err_disable_clk;
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device_init_wakeup(&pdev->dev, true);
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platform_set_drvdata(pdev, tscadc);
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return 0;
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err_disable_clk:
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@ -120,11 +120,6 @@
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#define TSCADC_CELLS 2
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enum tscadc_cells {
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TSC_CELL,
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ADC_CELL,
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};
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struct mfd_tscadc_board {
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struct tsc_data *tsc_init;
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struct adc_data *adc_init;
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@ -135,6 +130,9 @@ struct ti_tscadc_dev {
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struct regmap *regmap_tscadc;
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void __iomem *tscadc_base;
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int irq;
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int used_cells; /* 1-2 */
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int tsc_cell; /* -1 if not used */
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int adc_cell; /* -1 if not used */
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struct mfd_cell cells[TSCADC_CELLS];
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u32 reg_se_cache;
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spinlock_t reg_lock;
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