diff mbox series

[10/10] phy: qualcomm: phy-qcom-snps-eusb2: Add support for eUSB2 repeater

Message ID 20221116120157.2706810-11-abel.vesa@linaro.org
State Changes Requested
Headers show
Series phy: qualcomm: Add support for SM8550 | expand

Commit Message

Abel Vesa Nov. 16, 2022, 12:01 p.m. UTC 
From: Neil Armstrong <neil.armstrong@linaro.org>

For USB 2.0 compliance, eUSB2 needs a repeater. The PHY needs to
initialize and reset it. So add repeater support

Co-developed-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
---
 drivers/phy/qualcomm/phy-qcom-snps-eusb2.c | 39 ++++++++++++++++++++++
 1 file changed, 39 insertions(+)

Comments

kernel test robot Nov. 17, 2022, 1:43 a.m. UTC | #1 
Hi Abel,

I love your patch! Yet something to improve:

[auto build test ERROR on next-20221116]
[cannot apply to robh/for-next linus/master v6.1-rc5 v6.1-rc4 v6.1-rc3 v6.1-rc5]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Abel-Vesa/phy-qualcomm-Add-support-for-SM8550/20221116-200911
patch link:    https://lore.kernel.org/r/20221116120157.2706810-11-abel.vesa%40linaro.org
patch subject: [PATCH 10/10] phy: qualcomm: phy-qcom-snps-eusb2: Add support for eUSB2 repeater
config: s390-allyesconfig
compiler: s390-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/05e41426432fca60ef9f4389b0275f0c5c44cc31
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Abel-Vesa/phy-qualcomm-Add-support-for-SM8550/20221116-200911
        git checkout 05e41426432fca60ef9f4389b0275f0c5c44cc31
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/phy/qualcomm/phy-qcom-snps-eusb2.c:19:10: fatal error: linux/usb/repeater.h: No such file or directory
      19 | #include <linux/usb/repeater.h>
         |          ^~~~~~~~~~~~~~~~~~~~~~
   compilation terminated.


vim +19 drivers/phy/qualcomm/phy-qcom-snps-eusb2.c

  > 19	#include <linux/usb/repeater.h>
    20	
    21
diff mbox series

Patch

diff --git a/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c b/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c
index 1bb42ec14703..921502ffc55b 100644
--- a/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c
+++ b/drivers/phy/qualcomm/phy-qcom-snps-eusb2.c
@@ -16,6 +16,8 @@ 
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 #include <linux/slab.h>
+#include <linux/usb/repeater.h>
+
 
 #define USB_PHY_UTMI_CTRL0		(0x3c)
 #define SLEEPM				BIT(0)
@@ -135,6 +137,8 @@  struct qcom_snps_eusb2_hsphy {
 	struct regulator_bulk_data vregs[EUSB2_NUM_VREGS];
 
 	enum phy_mode mode;
+
+	struct usb_repeater *repeater;
 };
 
 static int qcom_snps_eusb2_hsphy_set_mode(struct phy *p, enum phy_mode mode, int submode)
@@ -231,6 +235,28 @@  static int qcom_eusb2_ref_clk_init(struct qcom_snps_eusb2_hsphy *phy)
 	return 0;
 }
 
+static int qcom_snps_eusb2_hsphy_repeater_reset_and_init(struct qcom_snps_eusb2_hsphy *phy)
+{
+	struct device *dev = &phy->phy->dev;
+	int ret;
+
+	/* TOFIX set mode, default to device */
+
+	ret = usb_repeater_power_on(phy->repeater);
+	if (ret)
+		dev_err(dev, "repeater power on failed.\n");
+
+	ret = usb_repeater_reset(phy->repeater, true);
+	if (ret)
+		dev_err(dev, "repeater reset failed.\n");
+
+	ret = usb_repeater_init(phy->repeater);
+	if (ret)
+		dev_err(dev, "repeater init failed.\n");
+
+	return ret;
+}
+
 static int qcom_snps_eusb2_hsphy_init(struct phy *p)
 {
 	struct qcom_snps_eusb2_hsphy *phy = phy_get_drvdata(p);
@@ -240,6 +266,11 @@  static int qcom_snps_eusb2_hsphy_init(struct phy *p)
 	if (ret)
 		return ret;
 
+	/* Bring eUSB2 repeater out of reset and initialized before eUSB2 PHY */
+	ret = qcom_snps_eusb2_hsphy_repeater_reset_and_init(phy);
+	if (ret)
+		goto disable_vreg;
+
 	ret = clk_prepare_enable(phy->ref_clk);
 	if (ret) {
 		dev_err(&p->dev, "failed to enable ref clock, %d\n", ret);
@@ -347,6 +378,8 @@  static int qcom_snps_eusb2_hsphy_exit(struct phy *p)
 
 	regulator_bulk_disable(ARRAY_SIZE(phy->vregs), phy->vregs);
 
+	usb_repeater_power_off(phy->repeater);
+
 	return 0;
 }
 
@@ -391,6 +424,12 @@  static int qcom_snps_eusb2_hsphy_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(dev, ret,
 				     "failed to get regulator supplies\n");
+
+	phy->repeater = devm_usb_get_repeater_by_phandle(dev, "usb-repeater", 0);
+	if (IS_ERR(phy->repeater))
+		return dev_err_probe(dev, PTR_ERR(phy->repeater),
+				     "failed to get repeater\n");
+
 	generic_phy = devm_phy_create(dev, NULL, &qcom_snps_eusb2_hsphy_ops);
 	if (IS_ERR(generic_phy)) {
 		dev_err(dev, "failed to create phy %d\n", ret);