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Subject[v4 6/6] media: platform: dwc: Add platform data support to D-Phy
Date
This patch allows the configuration via platform data. This allows
the driver loading not devicetree dependent.

Signed-off-by: Luis Oliveira <luis.oliveira@synopsys.com>
---
Changelog
v3-v4
- This patch was not in the v3. This enables pdata to configure the driver

drivers/media/platform/dwc/dw-dphy-plat.c | 87 ++++++++++++++++++++++---------
drivers/media/platform/dwc/dw-dphy-rx.c | 19 ++++---
2 files changed, 72 insertions(+), 34 deletions(-)

diff --git a/drivers/media/platform/dwc/dw-dphy-plat.c b/drivers/media/platform/dwc/dw-dphy-plat.c
index 1f5113d..34d9caf 100644
--- a/drivers/media/platform/dwc/dw-dphy-plat.c
+++ b/drivers/media/platform/dwc/dw-dphy-plat.c
@@ -23,38 +23,50 @@ static struct phy_ops dw_dphy_ops = {

static struct phy_provider *phy_provider;

+#if IS_ENABLED(CONFIG_DWC_MIPI_TC_DPHY_GEN3)
static u8 get_config_8l(struct device *dev, struct dw_dphy_rx *dphy)
{
- dphy->config_8l = of_get_gpio(dev->of_node, 0);
- if (!gpio_is_valid(dphy->config_8l)) {
- dev_warn(dev,
- "failed to parse 8l config, default is 0\n");
- dphy->config_8l = 0;
- }
+ if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
+ dphy->config_8l = of_get_gpio(dev->of_node, 0);
+ if (!gpio_is_valid(dphy->config_8l)) {
+ dev_warn(dev,
+ "failed to parse 8l config, default is 0\n");
+ dphy->config_8l = 0;
+ }
+ } else {
+ struct dw_phy_pdata *pdata = dev->platform_data;

+ dphy->config_8l = pdata->config_8l;
+ }
return dphy->config_8l;
}
-
+#endif
static int get_resources(struct device *dev, struct dw_dphy_rx *dphy)
{
int ret = 0;

- if (of_property_read_u32(dev->of_node, "snps,dphy-frequency",
- &dphy->dphy_freq)) {
- dev_err(dev, "failed to find dphy frequency\n");
- ret = -EINVAL;
- }
-
- if (of_property_read_u32(dev->of_node, "bus-width",
- &dphy->dphy_te_len)) {
- dev_err(dev, "failed to find dphy te length\n");
- ret = -EINVAL;
- }
+ if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
+ if (of_property_read_u32(dev->of_node, "snps,dphy-frequency",
+ &dphy->dphy_freq)) {
+ dev_err(dev, "failed to find dphy frequency\n");
+ ret = -EINVAL;
+ }
+ if (of_property_read_u32(dev->of_node, "bus-width",
+ &dphy->dphy_te_len)) {
+ dev_err(dev, "failed to find dphy te length\n");
+ ret = -EINVAL;
+ }
+ if (of_property_read_u32(dev->of_node, "snps,phy_type",
+ &dphy->phy_type)) {
+ dev_err(dev, "failed to find dphy type\n");
+ ret = -EINVAL;
+ }
+ } else {
+ struct dw_phy_pdata *pdata = dev->platform_data;

- if (of_property_read_u32(dev->of_node, "snps,phy_type",
- &dphy->phy_type)) {
- dev_err(dev, "failed to find dphy te length\n");
- ret = -EINVAL;
+ dphy->dphy_freq = pdata->dphy_frequency;
+ dphy->dphy_te_len = pdata->dphy_te_len;
+ dphy->dphy_gen = pdata->dphy_gen;
}
dev_set_drvdata(dev, dphy);

@@ -63,20 +75,39 @@ static int get_resources(struct device *dev, struct dw_dphy_rx *dphy)

static int phy_register(struct device *dev)
{
- if (dev->of_node) {
+ int ret = 0;
+
+ if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
phy_provider = devm_of_phy_provider_register(dev,
dw_dphy_xlate);
if (IS_ERR(phy_provider)) {
dev_err(dev, "error getting phy provider\n");
- return PTR_ERR(phy_provider);
+ ret = PTR_ERR(phy_provider);
}
+ } else {
+ struct dw_phy_pdata *pdata = dev->platform_data;
+ struct dw_dphy_rx *dphy = dev_get_drvdata(dev);
+
+ ret = phy_create_lookup(dphy->phy,
+ phys[pdata->id].name,
+ csis[pdata->id].name);
+ if (ret)
+ dev_err(dev, "Failed to create dphy lookup\n");
+ else
+ dev_warn(dev,
+ "Created dphy lookup [%s] --> [%s]\n",
+ phys[pdata->id].name, csis[pdata->id].name);
}
- return 0;
+ return ret;
}

static void phy_unregister(struct device *dev)
{
- devm_of_phy_provider_unregister(dev, phy_provider);
+ if (!dev->of_node) {
+ struct dw_dphy_rx *dphy = dev_get_drvdata(dev);
+
+ phy_remove_lookup(dphy->phy, "dw-dphy", "dw-csi");
+ }
}

static int dw_dphy_rx_probe(struct platform_device *pdev)
@@ -166,18 +197,22 @@ static int dw_dphy_rx_remove(struct platform_device *pdev)
return 0;
}

+#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id dw_dphy_rx_of_match[] = {
{ .compatible = "snps,dw-dphy-rx" },
{},
};

MODULE_DEVICE_TABLE(of, dw_dphy_rx_of_match);
+#endif

static struct platform_driver dw_dphy_rx_driver = {
.probe = dw_dphy_rx_probe,
.remove = dw_dphy_rx_remove,
.driver = {
+#if IS_ENABLED(CONFIG_OF)
.of_match_table = of_match_ptr(dw_dphy_rx_of_match),
+#endif
.name = "dw-dphy",
.owner = THIS_MODULE,
}
diff --git a/drivers/media/platform/dwc/dw-dphy-rx.c b/drivers/media/platform/dwc/dw-dphy-rx.c
index f57a814..a69cb3e 100644
--- a/drivers/media/platform/dwc/dw-dphy-rx.c
+++ b/drivers/media/platform/dwc/dw-dphy-rx.c
@@ -71,15 +71,18 @@ u8 dw_dphy_setup_config(struct dw_dphy_rx *dphy)
dev_vdbg(&dphy->phy->dev, "CONFIG 4L\n");
return CTRL_4_LANES;
}
-
- ret = gpio_request(dphy->config_8l, "config");
- if (ret < 0) {
- dev_vdbg(&dphy->phy->dev,
- "could not acquire config gpio (err=%d)\n", ret);
- return ret;
+ if (IS_ENABLED(CONFIG_OF)) {
+ ret = gpio_request(dphy->config_8l, "config");
+ if (ret < 0) {
+ dev_vdbg(&dphy->phy->dev,
+ "could not acquire config (err=%d)\n", ret);
+ return ret;
+ }
+ ret = gpio_get_value(dphy->config_8l);
+ gpio_free(dphy->config_8l);
+ } else {
+ ret = dphy->config_8l;
}
- ret = gpio_get_value(dphy->config_8l);
- gpio_free(dphy->config_8l);

dev_vdbg(&dphy->phy->dev,
"Booting in [%s] mode\n",
--
2.7.4
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