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mfd: Add device tree probe support for mc13xxx
This adds device tree probe support for mc13xxx mfd driver. Signed-off-by: Shawn Guo <shawn.guo@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Shawn Guo
Samuel Ortiz
parent
af9081ae64
commit
876989d586
2 changed files with 128 additions and 31 deletions
53
Documentation/devicetree/bindings/mfd/mc13xxx.txt
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53
Documentation/devicetree/bindings/mfd/mc13xxx.txt
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@ -0,0 +1,53 @@
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* Freescale MC13783/MC13892 Power Management Integrated Circuit (PMIC)
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Required properties:
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- compatible : Should be "fsl,mc13783" or "fsl,mc13892"
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Optional properties:
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- fsl,mc13xxx-uses-adc : Indicate the ADC is being used
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- fsl,mc13xxx-uses-codec : Indicate the Audio Codec is being used
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- fsl,mc13xxx-uses-rtc : Indicate the RTC is being used
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- fsl,mc13xxx-uses-touch : Indicate the touchscreen controller is being used
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Sub-nodes:
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- regulators : Contain the regulator nodes. The name of regulator node
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is being used by mc13xxx regulator driver to find the correct relator
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device.
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The bindings details of individual regulator device can be found in:
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Documentation/devicetree/bindings/regulator/regulator.txt
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Examples:
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ecspi@70010000 { /* ECSPI1 */
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fsl,spi-num-chipselects = <2>;
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cs-gpios = <&gpio3 24 0>, /* GPIO4_24 */
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<&gpio3 25 0>; /* GPIO4_25 */
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status = "okay";
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pmic: mc13892@0 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,mc13892";
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spi-max-frequency = <6000000>;
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reg = <0>;
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interrupt-parent = <&gpio0>;
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interrupts = <8>;
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regulators {
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sw1_reg: mc13892__sw1 {
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regulator-min-microvolt = <600000>;
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regulator-max-microvolt = <1375000>;
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regulator-boot-on;
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regulator-always-on;
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};
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sw2_reg: mc13892__sw2 {
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regulator-min-microvolt = <900000>;
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regulator-max-microvolt = <1850000>;
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regulator-boot-on;
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regulator-always-on;
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};
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};
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};
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};
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@ -18,11 +18,15 @@
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#include <linux/spi/spi.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/mc13xxx.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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struct mc13xxx {
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struct spi_device *spidev;
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struct mutex lock;
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int irq;
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int flags;
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irq_handler_t irqhandler[MC13XXX_NUM_IRQ];
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void *irqdata[MC13XXX_NUM_IRQ];
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@ -550,10 +554,7 @@ static const char *mc13xxx_get_chipname(struct mc13xxx *mc13xxx)
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int mc13xxx_get_flags(struct mc13xxx *mc13xxx)
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{
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struct mc13xxx_platform_data *pdata =
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dev_get_platdata(&mc13xxx->spidev->dev);
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return pdata->flags;
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return mc13xxx->flags;
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}
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EXPORT_SYMBOL(mc13xxx_get_flags);
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@ -696,17 +697,67 @@ static int mc13xxx_add_subdevice(struct mc13xxx *mc13xxx, const char *format)
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return mc13xxx_add_subdevice_pdata(mc13xxx, format, NULL, 0);
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}
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#ifdef CONFIG_OF
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static int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
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{
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struct device_node *np = mc13xxx->spidev->dev.of_node;
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if (!np)
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return -ENODEV;
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if (of_get_property(np, "fsl,mc13xxx-uses-adc", NULL))
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mc13xxx->flags |= MC13XXX_USE_ADC;
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if (of_get_property(np, "fsl,mc13xxx-uses-codec", NULL))
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mc13xxx->flags |= MC13XXX_USE_CODEC;
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if (of_get_property(np, "fsl,mc13xxx-uses-rtc", NULL))
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mc13xxx->flags |= MC13XXX_USE_RTC;
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if (of_get_property(np, "fsl,mc13xxx-uses-touch", NULL))
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mc13xxx->flags |= MC13XXX_USE_TOUCHSCREEN;
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return 0;
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}
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#else
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static inline int mc13xxx_probe_flags_dt(struct mc13xxx *mc13xxx)
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{
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return -ENODEV;
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}
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#endif
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static const struct spi_device_id mc13xxx_device_id[] = {
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{
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.name = "mc13783",
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.driver_data = MC13XXX_ID_MC13783,
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}, {
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.name = "mc13892",
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.driver_data = MC13XXX_ID_MC13892,
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
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static const struct of_device_id mc13xxx_dt_ids[] = {
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{ .compatible = "fsl,mc13783", .data = (void *) MC13XXX_ID_MC13783, },
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{ .compatible = "fsl,mc13892", .data = (void *) MC13XXX_ID_MC13892, },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, mc13xxx_dt_ids);
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static int mc13xxx_probe(struct spi_device *spi)
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{
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const struct of_device_id *of_id;
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struct spi_driver *sdrv = to_spi_driver(spi->dev.driver);
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struct mc13xxx *mc13xxx;
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struct mc13xxx_platform_data *pdata = dev_get_platdata(&spi->dev);
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enum mc13xxx_id id;
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int ret;
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if (!pdata) {
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dev_err(&spi->dev, "invalid platform data\n");
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return -EINVAL;
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}
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of_id = of_match_device(mc13xxx_dt_ids, &spi->dev);
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if (of_id)
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sdrv->id_table = &mc13xxx_device_id[(enum mc13xxx_id) of_id->data];
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mc13xxx = kzalloc(sizeof(*mc13xxx), GFP_KERNEL);
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if (!mc13xxx)
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@ -749,28 +800,33 @@ static int mc13xxx_probe(struct spi_device *spi)
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mc13xxx_unlock(mc13xxx);
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if (pdata->flags & MC13XXX_USE_ADC)
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if (mc13xxx_probe_flags_dt(mc13xxx) < 0 && pdata)
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mc13xxx->flags = pdata->flags;
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if (mc13xxx->flags & MC13XXX_USE_ADC)
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mc13xxx_add_subdevice(mc13xxx, "%s-adc");
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if (pdata->flags & MC13XXX_USE_CODEC)
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if (mc13xxx->flags & MC13XXX_USE_CODEC)
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mc13xxx_add_subdevice(mc13xxx, "%s-codec");
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
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&pdata->regulators, sizeof(pdata->regulators));
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if (pdata->flags & MC13XXX_USE_RTC)
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if (mc13xxx->flags & MC13XXX_USE_RTC)
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mc13xxx_add_subdevice(mc13xxx, "%s-rtc");
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if (pdata->flags & MC13XXX_USE_TOUCHSCREEN)
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if (mc13xxx->flags & MC13XXX_USE_TOUCHSCREEN)
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mc13xxx_add_subdevice(mc13xxx, "%s-ts");
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if (pdata->leds)
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if (pdata) {
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-regulator",
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&pdata->regulators, sizeof(pdata->regulators));
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-led",
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pdata->leds, sizeof(*pdata->leds));
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if (pdata->buttons)
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mc13xxx_add_subdevice_pdata(mc13xxx, "%s-pwrbutton",
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pdata->buttons, sizeof(*pdata->buttons));
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} else {
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mc13xxx_add_subdevice(mc13xxx, "%s-regulator");
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mc13xxx_add_subdevice(mc13xxx, "%s-led");
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mc13xxx_add_subdevice(mc13xxx, "%s-pwrbutton");
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}
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return 0;
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}
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@ -788,24 +844,12 @@ static int __devexit mc13xxx_remove(struct spi_device *spi)
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return 0;
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}
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static const struct spi_device_id mc13xxx_device_id[] = {
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{
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.name = "mc13783",
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.driver_data = MC13XXX_ID_MC13783,
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}, {
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.name = "mc13892",
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.driver_data = MC13XXX_ID_MC13892,
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}, {
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/* sentinel */
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}
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};
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MODULE_DEVICE_TABLE(spi, mc13xxx_device_id);
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static struct spi_driver mc13xxx_driver = {
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.id_table = mc13xxx_device_id,
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.driver = {
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.name = "mc13xxx",
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.owner = THIS_MODULE,
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.of_match_table = mc13xxx_dt_ids,
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},
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.probe = mc13xxx_probe,
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.remove = __devexit_p(mc13xxx_remove),
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