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Date: Wed, 18 May 2016 23:24:12 +0200
From: Arnd Bergmann <arnd@...db.de>
To: Felipe Balbi <balbi@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>, Andy Gross <andy.gross@...aro.org>,
David Brown <david.brown@...aro.org>,
Peter Chen <Peter.Chen@....com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Alan Stern <stern@...land.harvard.edu>,
Mark Brown <broonie@...nel.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-soc@...r.kernel.org, linux-usb@...r.kernel.org
Subject: [RFC 7/8] usb: phy: msm: remove v1p8/v3p3 voltage setting
As pointed out by Mark Brown, regulators that are always set
to a fixed voltage range should be initialized from the values
in the device tree rather than having client drivers set the
voltage manually.
This removes the msm_hsusb_ldo_init() function that adapts
the voltage on the fixed 1.8v and 3.3v regulators in the
MSM usb phy driver. For consistency, the msm_hsusb_init_vddcx()
is also removed, and instead we just set the voltages
directly where needed, reducing the code size further and
making it more obvious what is actually going on here.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
drivers/usb/phy/phy-msm-usb.c | 100 +++++++++---------------------------------
1 file changed, 21 insertions(+), 79 deletions(-)
diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
index bdcf049e465f..570fd3433937 100644
--- a/drivers/usb/phy/phy-msm-usb.c
+++ b/drivers/usb/phy/phy-msm-usb.c
@@ -281,13 +281,9 @@ struct msm_otg {
#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
-#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */
-#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */
#define USB_PHY_3P3_HPM_LOAD 50000 /* uA */
#define USB_PHY_3P3_LPM_LOAD 4000 /* uA */
-#define USB_PHY_1P8_VOL_MIN 1800000 /* uV */
-#define USB_PHY_1P8_VOL_MAX 1800000 /* uV */
#define USB_PHY_1P8_HPM_LOAD 50000 /* uA */
#define USB_PHY_1P8_LPM_LOAD 4000 /* uA */
@@ -307,51 +303,18 @@ enum regulators {
V1P8 = 2,
};
-static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
-{
- int ret = 0;
- struct regulator *vddcx = motg->regulators[VDDCX].consumer;
-
- if (init)
- ret = regulator_set_voltage(vddcx,
- motg->vdd_levels[VDD_LEVEL_MIN],
- motg->vdd_levels[VDD_LEVEL_MAX]);
- else
- ret = regulator_set_voltage(vddcx, 0,
- motg->vdd_levels[VDD_LEVEL_MAX]);
-
-
- if (ret)
- dev_err(motg->phy.dev, "Cannot set vddcx voltage\n");
-
- return ret;
-}
-
-static int msm_hsusb_ldo_init(struct msm_otg *motg)
-{
- int rc = 0;
-
- rc = regulator_set_voltage(motg->regulators[V3P3].consumer,
- USB_PHY_3P3_VOL_MIN, USB_PHY_3P3_VOL_MAX);
- if (rc) {
- dev_err(motg->phy.dev, "Cannot set v3p3 voltage\n");
- goto exit;
- }
- rc = regulator_set_voltage(motg->regulators[V1P8].consumer,
- USB_PHY_1P8_VOL_MIN, USB_PHY_1P8_VOL_MAX);
- if (rc) {
- dev_err(motg->phy.dev, "Cannot set v1p8 voltage\n");
- }
-exit:
- return rc;
-}
-
static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, int on)
{
+ int load_v1p8 = USB_PHY_1P8_LPM_LOAD;
+ int load_v3p3 = USB_PHY_3P3_LPM_LOAD;
+ const char *state = "LPM";
int ret;
- int load_v1p8 = on ? USB_PHY_1P8_HPM_LOAD : USB_PHY_1P8_LPM_LOAD;
- int load_v3p3 = on ? USB_PHY_3P3_HPM_LOAD : USB_PHY_3P3_LPM_LOAD;
- const char *state = on ? "HPM" : "LPM";
+
+ if (on) {
+ load_v1p8 = USB_PHY_1P8_HPM_LOAD;
+ load_v3p3 = USB_PHY_3P3_HPM_LOAD;
+ state = "HPM";
+ }
ret = regulator_set_load(motg->regulators[V1P8].consumer, load_v1p8);
if (ret < 0) {
@@ -366,7 +329,7 @@ static int msm_hsusb_ldo_set_mode(struct msm_otg *motg, int on)
return ret;
}
- pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
+ pr_debug("reg (%s)\n", state);
return ret < 0 ? ret : 0;
}
@@ -661,29 +624,6 @@ static int msm_phy_init(struct usb_phy *phy)
#ifdef CONFIG_PM
-static int msm_hsusb_config_vddcx(struct msm_otg *motg, int high)
-{
- int max_vol = motg->vdd_levels[VDD_LEVEL_MAX];
- int min_vol;
- int ret;
-
- if (high)
- min_vol = motg->vdd_levels[VDD_LEVEL_MIN];
- else
- min_vol = motg->vdd_levels[VDD_LEVEL_NONE];
-
- ret = regulator_set_voltage(motg->regulators[VDDCX].consumer,
- min_vol, max_vol);
- if (ret) {
- pr_err("Cannot set vddcx voltage\n");
- return ret;
- }
-
- pr_debug("%s: min_vol:%d max_vol:%d\n", __func__, min_vol, max_vol);
-
- return ret;
-}
-
static int msm_otg_suspend(struct msm_otg *motg)
{
struct usb_phy *phy = &motg->phy;
@@ -765,7 +705,9 @@ static int msm_otg_suspend(struct msm_otg *motg)
if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY &&
motg->pdata->otg_control == OTG_PMIC_CONTROL) {
msm_hsusb_ldo_set_mode(motg, 0);
- msm_hsusb_config_vddcx(motg, 0);
+ regulator_set_voltage(motg->regulators[VDDCX].consumer,
+ motg->vdd_levels[VDD_LEVEL_NONE],
+ motg->vdd_levels[VDD_LEVEL_MAX]);
}
if (device_may_wakeup(phy->dev))
@@ -805,7 +747,9 @@ static int msm_otg_resume(struct msm_otg *motg)
addr = USB_PHY_CTRL2;
msm_hsusb_ldo_set_mode(motg, 1);
- msm_hsusb_config_vddcx(motg, 1);
+ regulator_set_voltage(motg->regulators[VDDCX].consumer,
+ motg->vdd_levels[VDD_LEVEL_MIN],
+ motg->vdd_levels[VDD_LEVEL_MAX]);
writel(readl(addr) & ~PHY_RETEN, addr);
}
@@ -1939,17 +1883,14 @@ static int msm_otg_probe(struct platform_device *pdev)
if (!IS_ERR(motg->core_clk))
clk_prepare_enable(motg->core_clk);
- ret = msm_hsusb_init_vddcx(motg, 1);
+ ret = regulator_set_voltage(motg->regulators[VDDCX].consumer,
+ motg->vdd_levels[VDD_LEVEL_MIN],
+ motg->vdd_levels[VDD_LEVEL_MAX]);
if (ret) {
dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
goto disable_clks;
}
- ret = msm_hsusb_ldo_init(motg);
- if (ret) {
- dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
- goto disable_clks;
- }
ret = regulator_bulk_enable(ARRAY_SIZE(motg->regulators), motg->regulators);
if (ret)
{
@@ -2020,7 +1961,8 @@ static int msm_otg_probe(struct platform_device *pdev)
return 0;
disable_regulators:
- msm_hsusb_init_vddcx(motg, 0);
+ regulator_set_voltage(motg->regulators[VDDCX].consumer, 0,
+ motg->vdd_levels[VDD_LEVEL_MAX]);
regulator_bulk_disable(ARRAY_SIZE(motg->regulators), motg->regulators);
disable_clks:
clk_disable_unprepare(motg->pclk);
--
2.7.0
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