[PATCH 2/2] drm/bridge: sii902x: add optional power supplies

[Yannick FERTRE]

Reviewed-by: yannick fertre <yannick.fertre at st.com><mailto:yannick.fertre at st.com>

On 04/10/2018 07:19 AM, Philippe Cornu wrote:

Add the 3 optional power supplies using the exact description
found in the document named
"SiI9022A/SiI9024A HDMI Transmitter Data Sheet (August 2016)".

Signed-off-by: Philippe Cornu <philippe.cornu at st.com><mailto:philippe.cornu at st.com>
---
 drivers/gpu/drm/bridge/sii902x.c | 39 +++++++++++++++++++++++++++++++++++----
 1 file changed, 35 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/sii902x.c b/drivers/gpu/drm/bridge/sii902x.c
index 60373d7eb220..e17ba6db1ec8 100644
--- a/drivers/gpu/drm/bridge/sii902x.c
+++ b/drivers/gpu/drm/bridge/sii902x.c
@@ -24,6 +24,7 @@
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
+#include <linux/regulator/consumer.h>

 #include <drm/drmP.h>
 #include <drm/drm_atomic_helper.h>
@@ -86,6 +87,7 @@ struct sii902x {
        struct drm_bridge bridge;
        struct drm_connector connector;
        struct gpio_desc *reset_gpio;
+       struct regulator_bulk_data supplies[3];
 };

 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)
@@ -392,23 +394,43 @@ static int sii902x_probe(struct i2c_client *client,
                return PTR_ERR(sii902x->reset_gpio);
        }

+       sii902x->supplies[0].supply = "iovcc";
+       sii902x->supplies[1].supply = "avcc12";
+       sii902x->supplies[2].supply = "cvcc12";
+       ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(sii902x->supplies),
+                                     sii902x->supplies);
+       if (ret) {
+               dev_err(dev, "regulator_bulk_get failed\n");
+               return ret;
+       }
+
+       ret = regulator_bulk_enable(ARRAY_SIZE(sii902x->supplies),
+                                   sii902x->supplies);
+       if (ret) {
+               dev_err(dev, "regulator_bulk_enable failed\n");
+               return ret;
+       }
+
+       usleep_range(10000, 20000);
+
        sii902x_reset(sii902x);

        ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);
        if (ret)
-               return ret;
+               goto err_disable_regulator;

        ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),
                               &chipid, 4);
        if (ret) {
                dev_err(dev, "regmap_read failed %d\n", ret);
-               return ret;
+               goto err_disable_regulator;
        }

        if (chipid[0] != 0xb0) {
                dev_err(dev, "Invalid chipid: %02x (expecting 0xb0)\n",
                        chipid[0]);
-               return -EINVAL;
+               ret = -EINVAL;
+               goto err_disable_regulator;
        }

        /* Clear all pending interrupts */
@@ -424,7 +446,7 @@ static int sii902x_probe(struct i2c_client *client,
                                                IRQF_ONESHOT, dev_name(dev),
                                                sii902x);
                if (ret)
-                       return ret;
+                       goto err_disable_regulator;
        }

        sii902x->bridge.funcs = &sii902x_bridge_funcs;
@@ -434,6 +456,12 @@ static int sii902x_probe(struct i2c_client *client,
        i2c_set_clientdata(client, sii902x);

        return 0;
+
+err_disable_regulator:
+       regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
+                              sii902x->supplies);
+
+       return ret;
 }

 static int sii902x_remove(struct i2c_client *client)
@@ -443,6 +471,9 @@ static int sii902x_remove(struct i2c_client *client)

        drm_bridge_remove(&sii902x->bridge);

+       regulator_bulk_disable(ARRAY_SIZE(sii902x->supplies),
+                              sii902x->supplies);
+
        return 0;
 }



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