On 02/09/2015 10:11 AM, Peter Chen wrote:
+static void hi6220_detect_work(struct work_struct *work)
+{
+ struct hi6220_priv *priv =
+ container_of(work, struct hi6220_priv, work.work);
+ int gpio_id, gpio_vubs;
%s/gpio_vubs/gpio_vbus
Yes, typo
+static void hi6220_phy_setup(struct hi6220_priv *priv, bool on)
+{
+ struct regmap *reg = priv->reg;
+ u32 val, mask;
+ int ret;
+
+ if (priv->reg == NULL)
+ return;
+
+ if (on) {
+ val = RST0_USBOTG_BUS | RST0_POR_PICOPHY |
+ RST0_USBOTG | RST0_USBOTG_32K;
+ mask = val;
+ ret = regmap_update_bits(reg, SC_PERIPH_RSTDIS0, mask, val);
+ if (ret)
+ return;
+
+ ret = regmap_read(reg, SC_PERIPH_CTRL5, &val);
+ val = CTRL5_USBOTG_RES_SEL | CTRL5_PICOPHY_ACAENB;
+ mask = val | CTRL5_PICOPHY_BC_MODE;
+ ret = regmap_update_bits(reg, SC_PERIPH_CTRL5, mask, val);
+ if (ret)
+ return;
+
+ val = CTRL4_PICO_VBUSVLDEXT | CTRL4_PICO_VBUSVLDEXTSEL |
+ CTRL4_OTG_PHY_SEL;
+ mask = val | CTRL4_PICO_SIDDQ | CTRL4_PICO_OGDISABLE;
+ ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
+ if (ret)
+ return;
+
+ ret = regmap_write(reg, SC_PERIPH_CTRL8, EYE_PATTERN_PARA);
+ if (ret)
+ return;
+ } else {
+ val = CTRL4_PICO_SIDDQ;
+ mask = val;
+ ret = regmap_update_bits(reg, SC_PERIPH_CTRL4, mask, val);
+ if (ret)
+ return;
+
+ ret = regmap_read(reg, SC_PERIPH_CTRL4, &val);
+
+ val = RST0_USBOTG_BUS | RST0_POR_PICOPHY |
+ RST0_USBOTG | RST0_USBOTG_32K;
+ mask = val;
+ ret = regmap_update_bits(reg, SC_PERIPH_RSTEN0, mask, val);
+ if (ret)
+ return;
+ }
You have return value check for regmap API, but no error message or
return value for hi6220_phy_setup, it looks strange.
There was dev_err(priv->dev, "failed to setup phy\n");
Then I found priv->dev is the only one place to use, so I remove this
for simple.
+}
+
+static int hi6220_phy_probe(struct platform_device *pdev)
+{
+ struct hi6220_priv *priv;
+ struct usb_otg *otg;
+ struct device_node *np = pdev->dev.of_node;
+ int ret, irq;
+
+ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ otg = devm_kzalloc(&pdev->dev, sizeof(*otg), GFP_KERNEL);
+ if (!otg)
+ return -ENOMEM;
+
+ priv->phy.dev = &pdev->dev;
+ priv->phy.otg = otg;
+ priv->phy.label = "hi6220";
+ priv->phy.type = USB_PHY_TYPE_USB2;
+ otg->set_peripheral = hi6220_set_peripheral;
+ platform_set_drvdata(pdev, priv);
+
+ priv->gpio_vbus = of_get_named_gpio(np, "hisilicon,gpio-vbus", 0);
+ if (priv->gpio_vbus == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (!gpio_is_valid(priv->gpio_vbus)) {
+ dev_err(&pdev->dev, "invalid gpio %d\n", priv->gpio_vbus);
+ return -ENODEV;
+ }
+
+ priv->gpio_id = of_get_named_gpio(np, "hisilicon,gpio-id", 0);
+ if (priv->gpio_id == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (!gpio_is_valid(priv->gpio_id)) {
+ dev_err(&pdev->dev, "invalid gpio %d\n", priv->gpio_id);
+ return -ENODEV;
+ }
+
+ priv->reg = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
+ "hisilicon,peripheral-syscon");
+ if (IS_ERR(priv->reg))
+ priv->reg = NULL;
+
see my comments at your v1.
As replied in v1, EPROBE_DEFER does not needed.
syscon is register far earlier.
+ INIT_DELAYED_WORK(&priv->work, hi6220_detect_work);
+
+ ret = devm_gpio_request_one(&pdev->dev, priv->gpio_vbus,
+ GPIOF_IN, "gpio_vbus");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "gpio request failed for gpio_vbus\n");
+ return ret;
+ }
+
+ ret = devm_gpio_request_one(&pdev->dev, priv->gpio_id,
+ GPIOF_IN, "gpio_id");
+ if (ret < 0) {
+ dev_err(&pdev->dev, "gpio request failed for gpio_id\n");
+ return ret;
+ }
+
+ priv->vcc = devm_regulator_get(&pdev->dev, "vcc");
+ if (!IS_ERR(priv->vcc)) {
EPROBE_DEFER?
No, this is not needed, since regulator is registered earlier than device.
drivers/Makefile
# regulators early, since some subsystems rely on them to initialize
obj-$(CONFIG_REGULATOR) += regulator/
EPROBE_DEFER should be the last option we rely on.
Thanks
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