Add support for DT based probing of twl6040 core. Example of dts section for twl6040: twl6040: twl6040@4b { compatible = "ti,twl6040"; reg = <0x4b>; interrupts = <0 119 4>; /* IRQ_SYS_2N cascaded to gic */ interrupt-parent = <&gic>; twl6040,audpwron_gpio = <&gpio4 31 0>; /* gpio line 127 */ enable-active-high;
interrupt-controller; #interrupt-cells = <1>; vio-supply = <&v1v8>; v2v1-supply = <&v2v1>; twl6040_codec: twl6040@0 { compatible = "ti,twl6040-codec"; interrupts = <1>; }; }; Signed-off-by: Peter Ujfalusi <peter.ujfal...@ti.com> --- Documentation/devicetree/bindings/mfd/twl6040.txt | 51 +++++++++++++++++++++ drivers/mfd/twl6040-core.c | 23 +++++++--- drivers/mfd/twl6040-irq.c | 6 +++ 3 files changed, 74 insertions(+), 6 deletions(-) create mode 100644 Documentation/devicetree/bindings/mfd/twl6040.txt diff --git a/Documentation/devicetree/bindings/mfd/twl6040.txt b/Documentation/devicetree/bindings/mfd/twl6040.txt new file mode 100644 index 0000000..6d2399c7 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/twl6040.txt @@ -0,0 +1,51 @@ +Texas Instruments TWL6040 family + +The TWL6040s are 8-channel high quality low-power audio codecs providing audio +and vibra functionality on OMAP4+ platforms. +They are connected ot the host processor via i2c for commands, McPDM for audio +data and commands. + +Required properties: +- compatible : Must be "ti,twl6040"; +- reg: must be 0x4b for i2c address +- interrupts: twl6040 has one interrupt line connecteded to the main SoC +- interrupt-parent: The parent interrupt controller +- interrupt-controller: twl6040 support several interrupts internally, it is + considered as an interupt controller cascaded to the SoC core. +#interrupt-cells = <1>; +- twl6040,audpwron_gpio: Power on GPIO line for the twl6040 + +- vio-supply: Regulator for the twl6040 VIO supply +- v2v1-supply: Regulator for the twl6040 V2V1 supply + +Optional properties, nodes: +- enable-active-high: To power on the twl6040 during boot. +- Child nodes for audio functionality and for the vibra driver + For details on the child nodes see: + Documentation/devicetree/bindings/input/twl6040-vibra.txt - Vibra driver + Documentation/devicetree/bindings/sound/twl6040.txt - ASoC codec driver + +Example: +/* + * 8-channel high quality low-power audio codec + * http://www.ti.com/lit/ds/symlink/twl6040.pdf + */ +twl6040: twl6040@4b { + compatible = "ti,twl6040"; + reg = <0x4b>; + interrupts = <0 119 4>; /* IRQ_SYS_2N cascaded to gic */ + interrupt-parent = <&gic>; + twl6040,audpwron_gpio = <&gpio4 31 0>; /* gpio line 127 */ + enable-active-high; + + interrupt-controller; + #interrupt-cells = <1>; + + vio-supply = <&v1v8>; + v2v1-supply = <&v2v1>; + + twl6040_codec: twl6040@0 { + compatible = "ti,twl6040-codec"; + interrupts = <1>; + }; +}; diff --git a/drivers/mfd/twl6040-core.c b/drivers/mfd/twl6040-core.c index c50fba7..23b9771 100644 --- a/drivers/mfd/twl6040-core.c +++ b/drivers/mfd/twl6040-core.c @@ -29,6 +29,10 @@ #include <linux/kernel.h> #include <linux/err.h> #include <linux/platform_device.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_gpio.h> +#include <linux/of_platform.h> #include <linux/gpio.h> #include <linux/delay.h> #include <linux/i2c.h> @@ -505,11 +509,12 @@ static int __devinit twl6040_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct twl6040_platform_data *pdata = client->dev.platform_data; + struct device_node *node = client->dev.of_node; struct twl6040 *twl6040; struct mfd_cell *cell = NULL; int ret, children = 0; - if (!pdata) { + if (!pdata && !node) { dev_err(&client->dev, "Platform data is missing\n"); return -EINVAL; } @@ -560,9 +565,13 @@ static int __devinit twl6040_probe(struct i2c_client *client, twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV); /* ERRATA: Automatic power-up is not possible in ES1.0 */ - if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) - twl6040->audpwron = pdata->audpwron_gpio; - else + if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) { + if (pdata) + twl6040->audpwron = pdata->audpwron_gpio; + else + twl6040->audpwron = of_get_named_gpio(node, + "twl6040,audpwron_gpio", 0); + } else twl6040->audpwron = -EINVAL; if (gpio_is_valid(twl6040->audpwron)) { @@ -589,7 +598,7 @@ static int __devinit twl6040_probe(struct i2c_client *client, /* dual-access registers controlled by I2C only */ twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL); - if (pdata->codec) { + if (pdata && pdata->codec) { int irq = twl6040->irq_base + TWL6040_IRQ_PLUG; cell = &twl6040->cells[children]; @@ -603,7 +612,7 @@ static int __devinit twl6040_probe(struct i2c_client *client, children++; } - if (pdata->vibra) { + if (pdata && pdata->vibra) { int irq = twl6040->irq_base + TWL6040_IRQ_VIB; cell = &twl6040->cells[children]; @@ -623,6 +632,8 @@ static int __devinit twl6040_probe(struct i2c_client *client, children, NULL, 0); if (ret) goto mfd_err; + } else if (node) { + ret = of_platform_populate(node, NULL, NULL, &client->dev); } else { dev_err(&client->dev, "No platform data found for children\n"); ret = -ENODEV; diff --git a/drivers/mfd/twl6040-irq.c b/drivers/mfd/twl6040-irq.c index 914978e..4b42543 100644 --- a/drivers/mfd/twl6040-irq.c +++ b/drivers/mfd/twl6040-irq.c @@ -25,6 +25,8 @@ #include <linux/module.h> #include <linux/err.h> #include <linux/irq.h> +#include <linux/of.h> +#include <linux/irqdomain.h> #include <linux/interrupt.h> #include <linux/mfd/core.h> #include <linux/mfd/twl6040.h> @@ -139,6 +141,7 @@ static irqreturn_t twl6040_irq_thread(int irq, void *data) int twl6040_irq_init(struct twl6040 *twl6040) { + struct device_node *node = twl6040->dev->of_node; int i, nr_irqs, irq_base, ret; u8 val; @@ -158,6 +161,9 @@ int twl6040_irq_init(struct twl6040 *twl6040) } twl6040->irq_base = irq_base; + irq_domain_add_legacy(node, ARRAY_SIZE(twl6040_irqs), irq_base, 0, + &irq_domain_simple_ops, NULL); + /* Register them with genirq */ for (i = irq_base; i < irq_base + nr_irqs; i++) { irq_set_chip_data(i, twl6040); -- 1.7.8.6 _______________________________________________ devicetree-discuss mailing list devicetree-discuss@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss