Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
usb: phy: mxs: add wakeup enable for imx7ulp
This wakeup setting can enable USB wakeup function even the
controller's power is lost, and both A7 and M4 are in VLLS mode.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Reviewed-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20240726113207.3393247-4-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Xu Yang
and committed by
Greg Kroah-Hartman
c99b27ef
82c7a816
+39
-2
+39
-2
drivers/usb/phy/phy-mxs-usb.c
+39
-2
drivers/usb/phy/phy-mxs-usb.c
···
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#define BM_ANADIG_USB2_MISC_RX_VPIN_FS BIT(29)
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#define BM_ANADIG_USB2_MISC_RX_VMIN_FS BIT(28)
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+
/* System Integration Module (SIM) Registers */
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+
#define SIM_GPR1 0x30
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+
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#define USB_PHY_VLLS_WAKEUP_EN BIT(0)
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+
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#define to_mxs_phy(p) container_of((p), struct mxs_phy, phy)
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/* Do disconnection between PHY and controller without vbus */
···
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struct clk *clk;
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const struct mxs_phy_data *data;
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struct regmap *regmap_anatop;
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struct regmap *regmap_sim;
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int port_id;
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u32 tx_reg_set;
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u32 tx_reg_mask;
···
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}
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}
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+
/* Currently, only imx7ulp has SIM module */
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if (of_get_property(np, "nxp,sim", NULL)) {
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mxs_phy->regmap_sim = syscon_regmap_lookup_by_phandle
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+
(np, "nxp,sim");
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+
if (IS_ERR(mxs_phy->regmap_sim)) {
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dev_dbg(&pdev->dev,
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"failed to find regmap for sim\n");
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return PTR_ERR(mxs_phy->regmap_sim);
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}
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}
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+
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/* Precompute which bits of the TX register are to be updated, if any */
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if (!of_property_read_u32(np, "fsl,tx-cal-45-dn-ohms", &val) &&
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val >= MXS_PHY_TX_CAL45_MIN && val <= MXS_PHY_TX_CAL45_MAX) {
···
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}
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#ifdef CONFIG_PM_SLEEP
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static void mxs_phy_wakeup_enable(struct mxs_phy *mxs_phy, bool on)
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{
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u32 mask = USB_PHY_VLLS_WAKEUP_EN;
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+
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/* If the SoCs don't have SIM, quit */
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if (!mxs_phy->regmap_sim)
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return;
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+
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if (on) {
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regmap_update_bits(mxs_phy->regmap_sim, SIM_GPR1, mask, mask);
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udelay(500);
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+
} else {
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regmap_update_bits(mxs_phy->regmap_sim, SIM_GPR1, mask, 0);
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+
}
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+
}
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+
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static void mxs_phy_enable_ldo_in_suspend(struct mxs_phy *mxs_phy, bool on)
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{
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unsigned int reg = on ? ANADIG_ANA_MISC0_SET : ANADIG_ANA_MISC0_CLR;
···
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{
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struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
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-
if (device_may_wakeup(dev))
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if (device_may_wakeup(dev)) {
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mxs_phy_enable_ldo_in_suspend(mxs_phy, true);
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mxs_phy_wakeup_enable(mxs_phy, true);
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}
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return 0;
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}
···
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{
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struct mxs_phy *mxs_phy = dev_get_drvdata(dev);
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-
if (device_may_wakeup(dev))
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+
if (device_may_wakeup(dev)) {
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mxs_phy_enable_ldo_in_suspend(mxs_phy, false);
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+
mxs_phy_wakeup_enable(mxs_phy, false);
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+
}
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return 0;
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}