[PATCH v4 2/5] phy: rockchip: inno-usb2: ignore regmap_write return codes
From: Sebastian Reichel
Date: Mon Nov 09 2026 - 19:06:42 EST
This driver only uses MMIO regmaps, which means regmap_write and
regmap_write_bits() cannot fail (writing to unpowered/unclocked
registers would result in an SError instead of a regmap_write failure).
Thus drop the useless error handling for better code readability.
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
---
drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 161 +++++++-------------------
1 file changed, 43 insertions(+), 118 deletions(-)
diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index 0b61f152eb3f..a705c4b18bd4 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -263,8 +263,8 @@ struct rockchip_usb2phy {
struct rockchip_usb2phy_port ports[USB2PHY_NUM_PORTS];
};
-static inline int property_enable(struct regmap *base,
- const struct usb2phy_reg *reg, bool en)
+static inline void property_enable(struct regmap *base,
+ const struct usb2phy_reg *reg, bool en)
{
unsigned int val, mask, tmp;
@@ -272,7 +272,7 @@ static inline int property_enable(struct regmap *base,
mask = GENMASK(reg->bitend, reg->bitstart);
val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
- return regmap_write(base, reg->offset, val);
+ regmap_write(base, reg->offset, val);
}
static inline bool property_enabled(struct regmap *base,
@@ -336,15 +336,12 @@ static int rockchip_usb2phy_clk480m_prepare(struct clk_hw *hw)
{
const struct usb2phy_reg *clkout_ctl;
struct regmap *base;
- int ret;
rockchip_usb2phy_clk480m_clkout_ctl(hw, &base, &clkout_ctl);
/* turn on 480m clk output if it is off */
if (!property_enabled(base, clkout_ctl)) {
- ret = property_enable(base, clkout_ctl, true);
- if (ret)
- return ret;
+ property_enable(base, clkout_ctl, true);
/* waiting for the clk become stable */
usleep_range(1200, 1300);
@@ -481,25 +478,14 @@ static int rockchip_usb2phy_extcon_register(struct rockchip_usb2phy *rphy)
return 0;
}
-static int rockchip_usb2phy_enable_host_disc_irq(struct rockchip_usb2phy *rphy,
- struct rockchip_usb2phy_port *rport,
- bool en)
+static void rockchip_usb2phy_enable_host_disc_irq(struct rockchip_usb2phy *rphy,
+ struct rockchip_usb2phy_port *rport,
+ bool en)
{
- int ret;
-
- ret = property_enable(rphy->grf, &rport->port_cfg->disfall_clr, true);
- if (ret)
- return ret;
-
- ret = property_enable(rphy->grf, &rport->port_cfg->disfall_en, en);
- if (ret)
- return ret;
-
- ret = property_enable(rphy->grf, &rport->port_cfg->disrise_clr, true);
- if (ret)
- return ret;
-
- return property_enable(rphy->grf, &rport->port_cfg->disrise_en, en);
+ property_enable(rphy->grf, &rport->port_cfg->disfall_clr, true);
+ property_enable(rphy->grf, &rport->port_cfg->disfall_en, en);
+ property_enable(rphy->grf, &rport->port_cfg->disrise_clr, true);
+ property_enable(rphy->grf, &rport->port_cfg->disrise_en, en);
}
static int rockchip_usb2phy_init(struct phy *phy)
@@ -516,42 +502,14 @@ static int rockchip_usb2phy_init(struct phy *phy)
if (rport->mode != USB_DR_MODE_HOST &&
rport->mode != USB_DR_MODE_UNKNOWN) {
/* clear bvalid status and enable bvalid detect irq */
- ret = property_enable(rphy->grf,
- &rport->port_cfg->bvalid_det_clr,
- true);
- if (ret)
- goto out;
-
- ret = property_enable(rphy->grf,
- &rport->port_cfg->bvalid_det_en,
- true);
- if (ret)
- goto out;
+ property_enable(rphy->grf, &rport->port_cfg->bvalid_det_clr, true);
+ property_enable(rphy->grf, &rport->port_cfg->bvalid_det_en, true);
/* clear id status and enable id detect irqs */
- ret = property_enable(rphy->grf,
- &rport->port_cfg->idfall_det_clr,
- true);
- if (ret)
- goto out;
-
- ret = property_enable(rphy->grf,
- &rport->port_cfg->idrise_det_clr,
- true);
- if (ret)
- goto out;
-
- ret = property_enable(rphy->grf,
- &rport->port_cfg->idfall_det_en,
- true);
- if (ret)
- goto out;
-
- ret = property_enable(rphy->grf,
- &rport->port_cfg->idrise_det_en,
- true);
- if (ret)
- goto out;
+ property_enable(rphy->grf, &rport->port_cfg->idfall_det_clr, true);
+ property_enable(rphy->grf, &rport->port_cfg->idrise_det_clr, true);
+ property_enable(rphy->grf, &rport->port_cfg->idfall_det_en, true);
+ property_enable(rphy->grf, &rport->port_cfg->idrise_det_en, true);
schedule_delayed_work(&rport->otg_sm_work,
OTG_SCHEDULE_DELAY * 3);
@@ -562,28 +520,16 @@ static int rockchip_usb2phy_init(struct phy *phy)
} else if (rport->port_id == USB2PHY_PORT_HOST) {
if (rport->port_cfg->disfall_en.offset) {
rport->host_disconnect = true;
- ret = rockchip_usb2phy_enable_host_disc_irq(rphy, rport, true);
- if (ret) {
- dev_err(rphy->dev, "failed to enable disconnect irq\n");
- goto out;
- }
+ rockchip_usb2phy_enable_host_disc_irq(rphy, rport, true);
}
/* clear linestate and enable linestate detect irq */
- ret = property_enable(rphy->grf,
- &rport->port_cfg->ls_det_clr, true);
- if (ret)
- goto out;
-
- ret = property_enable(rphy->grf,
- &rport->port_cfg->ls_det_en, true);
- if (ret)
- goto out;
+ property_enable(rphy->grf, &rport->port_cfg->ls_det_clr, true);
+ property_enable(rphy->grf, &rport->port_cfg->ls_det_en, true);
schedule_delayed_work(&rport->sm_work, SCHEDULE_DELAY);
}
-out:
mutex_unlock(&rport->mutex);
return ret;
}
@@ -603,11 +549,7 @@ static int rockchip_usb2phy_power_on(struct phy *phy)
if (ret)
return ret;
- ret = property_enable(rphy->grf, &rport->port_cfg->phy_sus, false);
- if (ret) {
- clk_disable_unprepare(rphy->clk480m);
- return ret;
- }
+ property_enable(rphy->grf, &rport->port_cfg->phy_sus, false);
/*
* For rk3588, it needs to reset phy when exit from
@@ -632,16 +574,13 @@ static int rockchip_usb2phy_power_off(struct phy *phy)
{
struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
- int ret;
dev_dbg(&phy->dev, "port power off\n");
if (rport->suspended)
return 0;
- ret = property_enable(rphy->grf, &rport->port_cfg->phy_sus, true);
- if (ret)
- return ret;
+ property_enable(rphy->grf, &rport->port_cfg->phy_sus, true);
rport->suspended = true;
clk_disable_unprepare(rphy->clk480m);
@@ -1511,39 +1450,29 @@ static int rockchip_usb2phy_probe(struct platform_device *pdev)
static int rk3128_usb2phy_tuning(struct rockchip_usb2phy *rphy)
{
/* Turn off differential receiver in suspend mode */
- return regmap_write_bits(rphy->grf, 0x298,
- BIT(2) << BIT_WRITEABLE_SHIFT | BIT(2),
- BIT(2) << BIT_WRITEABLE_SHIFT | 0);
+ regmap_write_bits(rphy->grf, 0x298,
+ BIT(2) << BIT_WRITEABLE_SHIFT | BIT(2),
+ BIT(2) << BIT_WRITEABLE_SHIFT | 0);
+
+ return 0;
}
static int rk3528_usb2phy_tuning(struct rockchip_usb2phy *rphy)
{
- int ret;
-
/* Turn off otg port differential receiver in suspend mode */
- ret = regmap_write(rphy->phy_base, 0x30, BIT(18) | 0x0000);
- if (ret)
- return ret;
+ regmap_write(rphy->phy_base, 0x30, BIT(18) | 0x0000);
/* Turn off host port differential receiver in suspend mode */
- ret = regmap_write(rphy->phy_base, 0x430, BIT(18) | 0x0000);
- if (ret)
- return ret;
+ regmap_write(rphy->phy_base, 0x430, BIT(18) | 0x0000);
/* Set otg port HS eye height to 400mv (default is 450mv) */
- ret = regmap_write(rphy->phy_base, 0x30, GENMASK(22, 20) | 0x0000);
- if (ret)
- return ret;
+ regmap_write(rphy->phy_base, 0x30, GENMASK(22, 20) | 0x0000);
/* Set host port HS eye height to 400mv (default is 450mv) */
- ret = regmap_write(rphy->phy_base, 0x430, GENMASK(22, 20) | 0x0000);
- if (ret)
- return ret;
+ regmap_write(rphy->phy_base, 0x430, GENMASK(22, 20) | 0x0000);
/* Choose the Tx fs/ls data as linestate from TX driver for otg port */
- ret = regmap_write(rphy->phy_base, 0x94, GENMASK(22, 19) | 0x0018);
- if (ret)
- return ret;
+ regmap_write(rphy->phy_base, 0x94, GENMASK(22, 19) | 0x0018);
return 0;
}
@@ -1554,9 +1483,7 @@ static int rk3576_usb2phy_tuning(struct rockchip_usb2phy *rphy)
u32 reg = rphy->phy_cfg->reg;
/* Deassert SIDDQ to power on analog block */
- ret = regmap_write(rphy->grf, reg + 0x0010, GENMASK(29, 29) | 0x0000);
- if (ret)
- return ret;
+ regmap_write(rphy->grf, reg + 0x0010, GENMASK(29, 29) | 0x0000);
/* Do reset after exit IDDQ mode */
ret = rockchip_usb2phy_reset(rphy);
@@ -1564,12 +1491,12 @@ static int rk3576_usb2phy_tuning(struct rockchip_usb2phy *rphy)
return ret;
/* HS DC Voltage Level Adjustment 4'b1001 : +5.89% */
- ret |= regmap_write(rphy->grf, reg + 0x000c, GENMASK(27, 24) | 0x0900);
+ regmap_write(rphy->grf, reg + 0x000c, GENMASK(27, 24) | 0x0900);
/* HS Transmitter Pre-Emphasis Current Control 2'b10 : 2x */
- ret |= regmap_write(rphy->grf, reg + 0x0010, GENMASK(20, 19) | 0x0010);
+ regmap_write(rphy->grf, reg + 0x0010, GENMASK(20, 19) | 0x0010);
- return ret;
+ return 0;
}
static int rk3588_usb2phy_tuning(struct rockchip_usb2phy *rphy)
@@ -1594,9 +1521,7 @@ static int rk3588_usb2phy_tuning(struct rockchip_usb2phy *rphy)
}
/* Deassert SIDDQ to power on analog block */
- ret = regmap_write(rphy->grf, 0x0008, GENMASK(29, 29) | 0x0000);
- if (ret)
- return ret;
+ regmap_write(rphy->grf, 0x0008, GENMASK(29, 29) | 0x0000);
/* Do reset after exit IDDQ mode */
ret = rockchip_usb2phy_reset(rphy);
@@ -1604,21 +1529,21 @@ static int rk3588_usb2phy_tuning(struct rockchip_usb2phy *rphy)
return ret;
/* suspend configuration */
- ret |= regmap_write(rphy->grf, 0x000c, GENMASK(20, 16) | suspend_cfg);
+ regmap_write(rphy->grf, 0x000c, GENMASK(20, 16) | suspend_cfg);
/* HS DC Voltage Level Adjustment 4'b1001 : +5.89% */
- ret |= regmap_write(rphy->grf, 0x0004, GENMASK(27, 24) | 0x0900);
+ regmap_write(rphy->grf, 0x0004, GENMASK(27, 24) | 0x0900);
/* HS Transmitter Pre-Emphasis Current Control 2'b10 : 2x */
- ret |= regmap_write(rphy->grf, 0x0008, GENMASK(20, 19) | 0x0010);
+ regmap_write(rphy->grf, 0x0008, GENMASK(20, 19) | 0x0010);
if (!usb3otg)
- return ret;
+ return 0;
/* Pullup iddig pin for USB3_0 OTG mode */
- ret |= regmap_write(rphy->grf, 0x0010, GENMASK(17, 16) | 0x0003);
+ regmap_write(rphy->grf, 0x0010, GENMASK(17, 16) | 0x0003);
- return ret;
+ return 0;
}
static const struct rockchip_usb2phy_cfg rk3036_phy_cfgs[] = {
--
2.53.0