mfd: twl4030-power: Start transition to DT
Support for loading twl4030-power module via devicetree. For now, when booting with a DT, only the poweroff callback feature is supported through the ti,use_poweroff property. Signed-off-by: Florian Vaussard <florian.vaussard@epfl.ch> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>hifive-unleashed-5.1
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f58cb40763
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b0fc1da4d0
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@ -0,0 +1,28 @@
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Texas Instruments TWL family (twl4030) reset and power management module
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The power management module inside the TWL family provides several facilities
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to control the power resources, including power scripts. For now, the
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binding only supports the complete shutdown of the system after poweroff.
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Required properties:
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- compatible : must be "ti,twl4030-power"
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Optional properties:
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- ti,use_poweroff: With this flag, the chip will initiates an ACTIVE-to-OFF or
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SLEEP-to-OFF transition when the system poweroffs.
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Example:
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&i2c1 {
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clock-frequency = <2600000>;
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twl: twl@48 {
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reg = <0x48>;
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interrupts = <7>; /* SYS_NIRQ cascaded to intc */
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interrupt-parent = <&intc>;
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twl_power: power {
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compatible = "ti,twl4030-power";
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ti,use_poweroff;
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};
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};
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};
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@ -28,6 +28,7 @@
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#include <linux/pm.h>
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#include <linux/pm.h>
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#include <linux/i2c/twl.h>
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#include <linux/i2c/twl.h>
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#include <linux/platform_device.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <asm/mach-types.h>
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#include <asm/mach-types.h>
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@ -540,12 +541,30 @@ void twl4030_power_off(void)
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pr_err("TWL4030 Unable to power off\n");
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pr_err("TWL4030 Unable to power off\n");
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}
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}
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static bool twl4030_power_use_poweroff(struct twl4030_power_data *pdata,
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struct device_node *node)
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{
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if (pdata && pdata->use_poweroff)
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return true;
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if (of_property_read_bool(node, "ti,use_poweroff"))
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return true;
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return false;
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}
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int twl4030_power_probe(struct platform_device *pdev)
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int twl4030_power_probe(struct platform_device *pdev)
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{
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{
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struct twl4030_power_data *pdata = pdev->dev.platform_data;
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struct twl4030_power_data *pdata = pdev->dev.platform_data;
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struct device_node *node = pdev->dev.of_node;
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int err = 0;
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int err = 0;
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u8 val;
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u8 val;
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if (!pdata && !node) {
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dev_err(&pdev->dev, "Platform data is missing\n");
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return -EINVAL;
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}
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
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err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
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TWL4030_PM_MASTER_PROTECT_KEY);
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TWL4030_PM_MASTER_PROTECT_KEY);
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if (err)
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if (err)
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@ -556,15 +575,18 @@ int twl4030_power_probe(struct platform_device *pdev)
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if (err)
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if (err)
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goto unlock;
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goto unlock;
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err = twl4030_power_configure_scripts(pdata);
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if (pdata) {
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if (err)
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/* TODO: convert to device tree */
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goto load;
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err = twl4030_power_configure_scripts(pdata);
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err = twl4030_power_configure_resources(pdata);
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if (err)
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if (err)
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goto load;
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goto resource;
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err = twl4030_power_configure_resources(pdata);
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if (err)
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goto resource;
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}
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/* Board has to be wired properly to use this feature */
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/* Board has to be wired properly to use this feature */
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if (pdata->use_poweroff && !pm_power_off) {
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if (twl4030_power_use_poweroff(pdata, node) && !pm_power_off) {
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/* Default for SEQ_OFFSYNC is set, lets ensure this */
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/* Default for SEQ_OFFSYNC is set, lets ensure this */
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
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err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
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TWL4030_PM_MASTER_CFG_P123_TRANSITION);
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TWL4030_PM_MASTER_CFG_P123_TRANSITION);
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@ -610,10 +632,19 @@ static int twl4030_power_remove(struct platform_device *pdev)
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return 0;
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return 0;
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}
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}
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#ifdef CONFIG_OF
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static const struct of_device_id twl4030_power_of_match[] = {
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{.compatible = "ti,twl4030-power", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, twl4030_power_of_match);
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#endif
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static struct platform_driver twl4030_power_driver = {
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static struct platform_driver twl4030_power_driver = {
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.driver = {
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.driver = {
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.name = "twl4030_power",
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.name = "twl4030_power",
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.owner = THIS_MODULE,
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(twl4030_power_of_match),
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},
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},
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.probe = twl4030_power_probe,
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.probe = twl4030_power_probe,
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.remove = twl4030_power_remove,
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.remove = twl4030_power_remove,
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