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authorMartin Blumenstingl <martin.blumenstingl@googlemail.com>2020-05-13 00:24:22 +0200
committerVinod Koul <vkoul@kernel.org>2020-05-15 13:16:55 +0530
commit6b99262fd2f210284b4d17928fd03bee2f5a4fe1 (patch)
treefa5c5c322741c6b14e34f585f1b41ed35c0ec87e /drivers
parentde143a40fa7d0acae4295c3b312ec96cc8dd9cd0 (diff)
downloadlwn-6b99262fd2f210284b4d17928fd03bee2f5a4fe1.tar.gz
lwn-6b99262fd2f210284b4d17928fd03bee2f5a4fe1.zip
phy: amlogic: meson8b-usb2: Don't set REG_ADP_BC_ACA_ENABLE on Meson8
Skip setting REG_ADP_BC_ACA_ENABLE on Meson8 SoCs and polling for the REG_ADP_BC_ACA_PIN_FLOAT bit. The vendor also skips this part on Meson8 SoCs. This fixes initialization of the host-only USB PHY on Meson8 which would otherwise fail with "USB ID detect failed!". Fixes: 4a3449d1a0a10c ("phy: meson8b-usb2: add support for the USB PHY on Meson8 SoCs") Reported-by: Thomas Graichen <thomas.graichen@gmail.com> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Tested-by: Thomas Graichen <thomas.graichen@gmail.com> Link: https://lore.kernel.org/r/20200512222424.549351-5-martin.blumenstingl@googlemail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/phy/amlogic/phy-meson8b-usb2.c48
1 files changed, 38 insertions, 10 deletions
diff --git a/drivers/phy/amlogic/phy-meson8b-usb2.c b/drivers/phy/amlogic/phy-meson8b-usb2.c
index 86824cc21f11..7236b8885f07 100644
--- a/drivers/phy/amlogic/phy-meson8b-usb2.c
+++ b/drivers/phy/amlogic/phy-meson8b-usb2.c
@@ -10,6 +10,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <linux/phy/phy.h>
@@ -105,12 +106,17 @@
#define RESET_COMPLETE_TIME 500
#define ACA_ENABLE_COMPLETE_TIME 50
+struct phy_meson8b_usb2_match_data {
+ bool host_enable_aca;
+};
+
struct phy_meson8b_usb2_priv {
- struct regmap *regmap;
- enum usb_dr_mode dr_mode;
- struct clk *clk_usb_general;
- struct clk *clk_usb;
- struct reset_control *reset;
+ struct regmap *regmap;
+ enum usb_dr_mode dr_mode;
+ struct clk *clk_usb_general;
+ struct clk *clk_usb;
+ struct reset_control *reset;
+ const struct phy_meson8b_usb2_match_data *match;
};
static const struct regmap_config phy_meson8b_usb2_regmap_conf = {
@@ -166,7 +172,8 @@ static int phy_meson8b_usb2_power_on(struct phy *phy)
regmap_update_bits(priv->regmap, REG_CTRL, REG_CTRL_SOF_TOGGLE_OUT,
REG_CTRL_SOF_TOGGLE_OUT);
- if (priv->dr_mode == USB_DR_MODE_HOST) {
+ if (priv->dr_mode == USB_DR_MODE_HOST &&
+ priv->match->host_enable_aca) {
regmap_update_bits(priv->regmap, REG_ADP_BC,
REG_ADP_BC_ACA_ENABLE,
REG_ADP_BC_ACA_ENABLE);
@@ -216,6 +223,10 @@ static int phy_meson8b_usb2_probe(struct platform_device *pdev)
if (IS_ERR(base))
return PTR_ERR(base);
+ priv->match = device_get_match_data(&pdev->dev);
+ if (!priv->match)
+ return -ENODEV;
+
priv->regmap = devm_regmap_init_mmio(&pdev->dev, base,
&phy_meson8b_usb2_regmap_conf);
if (IS_ERR(priv->regmap))
@@ -254,11 +265,28 @@ static int phy_meson8b_usb2_probe(struct platform_device *pdev)
return PTR_ERR_OR_ZERO(phy_provider);
}
+static const struct phy_meson8b_usb2_match_data phy_meson8_usb2_match_data = {
+ .host_enable_aca = false,
+};
+
+static const struct phy_meson8b_usb2_match_data phy_meson8b_usb2_match_data = {
+ .host_enable_aca = true,
+};
+
static const struct of_device_id phy_meson8b_usb2_of_match[] = {
- { .compatible = "amlogic,meson8-usb2-phy", },
- { .compatible = "amlogic,meson8b-usb2-phy", },
- { .compatible = "amlogic,meson-gxbb-usb2-phy", },
- { },
+ {
+ .compatible = "amlogic,meson8-usb2-phy",
+ .data = &phy_meson8_usb2_match_data
+ },
+ {
+ .compatible = "amlogic,meson8b-usb2-phy",
+ .data = &phy_meson8b_usb2_match_data
+ },
+ {
+ .compatible = "amlogic,meson-gxbb-usb2-phy",
+ .data = &phy_meson8b_usb2_match_data
+ },
+ { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, phy_meson8b_usb2_of_match);