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SubjectRe: [PATCH 2/4] phy: rockchip-typec: support variable phy config value
Hi Lin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on rockchip/for-next]
[also build test WARNING on v4.17-rc3 next-20180504]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Lin-Huang/drm-rockchip-add-transfer-function-for-cdn-dp/20180504-235745
base: https://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git for-next
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm64

All warnings (new ones prefixed by >>):

drivers/phy/rockchip/phy-rockchip-typec.c: In function 'rockchip_typec_phy_probe':
>> drivers/phy/rockchip/phy-rockchip-typec.c:1227:21: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
tcphy->port_cfgs = &phy_cfgs[index];
^
drivers/phy/rockchip/phy-rockchip-typec.c: In function 'tcphy_cfg_dp_pll.isra.2':
>> drivers/phy/rockchip/phy-rockchip-typec.c:512:6: warning: 'clk_ctrl' may be used uninitialized in this function [-Wmaybe-uninitialized]
u32 clk_ctrl;
^~~~~~~~
>> drivers/phy/rockchip/phy-rockchip-typec.c:511:18: warning: 'phy_cfg' may be used uninitialized in this function [-Wmaybe-uninitialized]
struct phy_reg *phy_cfg;
^~~~~~~

vim +/const +1227 drivers/phy/rockchip/phy-rockchip-typec.c

e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1194
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1195 static int rockchip_typec_phy_probe(struct platform_device *pdev)
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1196 {
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1197 struct device *dev = &pdev->dev;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1198 struct device_node *np = dev->of_node;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1199 struct device_node *child_np;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1200 struct rockchip_typec_phy *tcphy;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1201 struct phy_provider *phy_provider;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1202 struct resource *res;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1203 const struct rockchip_usb3phy_port_cfg *phy_cfgs;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1204 const struct of_device_id *match;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1205 int index, ret;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1206
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1207 tcphy = devm_kzalloc(dev, sizeof(*tcphy), GFP_KERNEL);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1208 if (!tcphy)
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1209 return -ENOMEM;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1210
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1211 match = of_match_device(dev->driver->of_match_table, dev);
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1212 if (!match || !match->data) {
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1213 dev_err(dev, "phy configs are not assigned!\n");
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1214 return -EINVAL;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1215 }
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1216
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1217 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1218 tcphy->base = devm_ioremap_resource(dev, res);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1219 if (IS_ERR(tcphy->base))
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1220 return PTR_ERR(tcphy->base);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1221
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1222 phy_cfgs = match->data;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1223 /* find out a proper config which can be matched with dt. */
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1224 index = 0;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1225 while (phy_cfgs[index].reg) {
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1226 if (phy_cfgs[index].reg == res->start) {
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 @1227 tcphy->port_cfgs = &phy_cfgs[index];
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1228 break;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1229 }
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1230
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1231 ++index;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1232 }
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1233
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1234 if (!tcphy->port_cfgs) {
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1235 dev_err(dev, "no phy-config can be matched with %s node\n",
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1236 np->name);
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1237 return -EINVAL;
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1238 }
0fbc47d9 drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-02-16 1239
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1240 ret = tcphy_parse_dt(tcphy, dev);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1241 if (ret)
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1242 return ret;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1243
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1244 tcphy->dev = dev;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1245 platform_set_drvdata(pdev, tcphy);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1246 mutex_init(&tcphy->lock);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1247
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1248 typec_phy_pre_init(tcphy);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1249
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1250 tcphy->extcon = extcon_get_edev_by_phandle(dev, 0);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1251 if (IS_ERR(tcphy->extcon)) {
ec1fcd7b drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-03-01 1252 if (PTR_ERR(tcphy->extcon) == -ENODEV) {
ec1fcd7b drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-03-01 1253 tcphy->extcon = NULL;
ec1fcd7b drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-03-01 1254 } else {
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1255 if (PTR_ERR(tcphy->extcon) != -EPROBE_DEFER)
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1256 dev_err(dev, "Invalid or missing extcon\n");
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1257 return PTR_ERR(tcphy->extcon);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1258 }
ec1fcd7b drivers/phy/rockchip/phy-rockchip-typec.c Enric Balletbo i Serra 2018-03-01 1259 }
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1260
cdb051be drivers/phy/rockchip/phy-rockchip-typec.c Lin Huang 2018-05-04 1261 tcphy->typec_phy_config = type_c_dp_phy_config;
2a4d5962 drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-09-07 1262 pm_runtime_enable(dev);
2a4d5962 drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-09-07 1263
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1264 for_each_available_child_of_node(np, child_np) {
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1265 struct phy *phy;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1266
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1267 if (!of_node_cmp(child_np->name, "dp-port"))
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1268 phy = devm_phy_create(dev, child_np,
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1269 &rockchip_dp_phy_ops);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1270 else if (!of_node_cmp(child_np->name, "usb3-port"))
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1271 phy = devm_phy_create(dev, child_np,
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1272 &rockchip_usb3_phy_ops);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1273 else
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1274 continue;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1275
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1276 if (IS_ERR(phy)) {
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1277 dev_err(dev, "failed to create phy: %s\n",
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1278 child_np->name);
3cb0ab6e drivers/phy/rockchip/phy-rockchip-typec.c Chris Zhong 2016-09-08 1279 pm_runtime_disable(dev);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1280 return PTR_ERR(phy);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1281 }
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1282
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1283 phy_set_drvdata(phy, tcphy);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1284 }
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1285
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1286 phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1287 if (IS_ERR(phy_provider)) {
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1288 dev_err(dev, "Failed to register phy provider\n");
3cb0ab6e drivers/phy/rockchip/phy-rockchip-typec.c Chris Zhong 2016-09-08 1289 pm_runtime_disable(dev);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1290 return PTR_ERR(phy_provider);
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1291 }
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1292
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1293 return 0;
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1294 }
e96be45c drivers/phy/phy-rockchip-typec.c Chris Zhong 2016-08-23 1295

:::::: The code at line 1227 was first introduced by commit
:::::: 0fbc47d9e426a934668dbfeb0db26da6f0b7f35c phy: rockchip-typec: deprecate some DT properties for various register fields.

:::::: TO: Enric Balletbo i Serra <enric.balletbo@collabora.com>
:::::: CC: Kishon Vijay Abraham I <kishon@ti.com>

---
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