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Subject[PATCH v6 3/4] phy: rcar-gen3-usb2: add SoC-specific parameter for dedicated pins
Date
This patch adds SoC-specific parameter to avoid reading/writing
specific registers wrongly if this driver runs on a SoC which doesn't
have dedicated pins (e.g. R-Car D3). This patch also changes the
value "has_otg" to "has_otg_pins" for slightly easier reading of
the code.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
---
drivers/phy/renesas/phy-rcar-gen3-usb2.c | 31 +++++++++++++++++++++----------
1 file changed, 21 insertions(+), 10 deletions(-)

diff --git a/drivers/phy/renesas/phy-rcar-gen3-usb2.c b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
index 00a8303..479ae94 100644
--- a/drivers/phy/renesas/phy-rcar-gen3-usb2.c
+++ b/drivers/phy/renesas/phy-rcar-gen3-usb2.c
@@ -18,6 +18,7 @@
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
@@ -80,6 +81,8 @@
#define USB2_ADPCTRL_IDPULLUP BIT(5) /* 1 = ID sampling is enabled */
#define USB2_ADPCTRL_DRVVBUS BIT(4)

+#define RCAR_GEN3_PHY_HAS_DEDICATED_PINS 1
+
struct rcar_gen3_chan {
void __iomem *base;
struct extcon_dev *extcon;
@@ -87,7 +90,7 @@ struct rcar_gen3_chan {
struct regulator *vbus;
struct work_struct work;
bool extcon_host;
- bool has_otg;
+ bool has_otg_pins;
};

static void rcar_gen3_phy_usb2_work(struct work_struct *work)
@@ -234,7 +237,7 @@ static ssize_t role_store(struct device *dev, struct device_attribute *attr,
bool is_b_device;
enum phy_mode cur_mode, new_mode;

- if (!ch->has_otg || !ch->phy->init_count)
+ if (!ch->has_otg_pins || !ch->phy->init_count)
return -EIO;

if (!strncmp(buf, "host", strlen("host")))
@@ -272,7 +275,7 @@ static ssize_t role_show(struct device *dev, struct device_attribute *attr,
{
struct rcar_gen3_chan *ch = dev_get_drvdata(dev);

- if (!ch->has_otg || !ch->phy->init_count)
+ if (!ch->has_otg_pins || !ch->phy->init_count)
return -EIO;

return sprintf(buf, "%s\n", rcar_gen3_is_host(ch) ? "host" :
@@ -311,7 +314,7 @@ static int rcar_gen3_phy_usb2_init(struct phy *p)
writel(USB2_OC_TIMSET_INIT, usb2_base + USB2_OC_TIMSET);

/* Initialize otg part */
- if (channel->has_otg)
+ if (channel->has_otg_pins)
rcar_gen3_init_otg(channel);

return 0;
@@ -385,9 +388,17 @@ static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
}

static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
- { .compatible = "renesas,usb2-phy-r8a7795" },
- { .compatible = "renesas,usb2-phy-r8a7796" },
- { .compatible = "renesas,rcar-gen3-usb2-phy" },
+ {
+ .compatible = "renesas,usb2-phy-r8a7795",
+ .data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
+ },
+ {
+ .compatible = "renesas,usb2-phy-r8a7796",
+ .data = (void *)RCAR_GEN3_PHY_HAS_DEDICATED_PINS,
+ },
+ {
+ .compatible = "renesas,rcar-gen3-usb2-phy",
+ },
{ }
};
MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
@@ -433,7 +444,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
if (of_usb_get_dr_mode_by_phy(dev->of_node, 0) == USB_DR_MODE_OTG) {
int ret;

- channel->has_otg = true;
+ channel->has_otg_pins = (uintptr_t)of_device_get_match_data(dev);
channel->extcon = devm_extcon_dev_allocate(dev,
rcar_gen3_phy_cable);
if (IS_ERR(channel->extcon))
@@ -475,7 +486,7 @@ static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
dev_err(dev, "Failed to register PHY provider\n");
ret = PTR_ERR(provider);
goto error;
- } else if (channel->has_otg) {
+ } else if (channel->has_otg_pins) {
int ret;

ret = device_create_file(dev, &dev_attr_role);
@@ -495,7 +506,7 @@ static int rcar_gen3_phy_usb2_remove(struct platform_device *pdev)
{
struct rcar_gen3_chan *channel = platform_get_drvdata(pdev);

- if (channel->has_otg)
+ if (channel->has_otg_pins)
device_remove_file(&pdev->dev, &dev_attr_role);

pm_runtime_disable(&pdev->dev);
--
1.9.1
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