i2c: tegra: Check for atomic_xfer_only in shutdown

- Check for atomic_xfer_only also during shutdown
- Add debug prints

Bug 1703009

Change-Id: Iab1c3412eb988e8b4ab70ea317cc11057f87463f
Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com>
Signed-off-by: Sivaram Nair <sivaramn@nvidia.com>
Reviewed-on: http://git-master/r/830957
(cherry picked from commit 300050c0453d64d085a497e4f2ac12fe8ff2c8fc)
Reviewed-on: http://git-master/r/832261
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Timo Alho <talho@nvidia.com>

1 files changed, 27 insertions, 12 deletions

diff --git a/drivers/i2c/busses/i2c-bpmp-tegra.c b/drivers/i2c/busses/i2c-bpmp-tegra.c
index 3f23cb006..a2d84a398 100644
--- a/drivers/i2c/busses/i2c-bpmp-tegra.c
+++ b/drivers/i2c/busses/i2c-bpmp-tegra.c
@@ -190,27 +190,49 @@ static int deserialize_i2c(char *buf, size_t bufsize,
         return 0;
 }
 
+/**
+ * struct tegra_i2c_dev - per device i2c context
+ * @adapter: core i2c layer adapter information
+ */
+struct tegra_bpmp_i2c_dev {
+        struct i2c_adapter adapter;
+        u32 bpmp_adapter_id;
+};
+
 
 static int tegra_bpmp_i2c(struct mrq_i2c_data_in *in,
-                          struct mrq_i2c_data_out *out)
+                          struct mrq_i2c_data_out *out,
+                          struct tegra_bpmp_i2c_dev *i2c_dev)
 {
+        unsigned long flags;
+        int ret;
+
         if (irqs_disabled())
                 return tegra_bpmp_send_receive_atomic(MRQ_I2C,
                                 in, sizeof(*in), out, sizeof(*out));
 
+        if (i2c_dev->adapter.atomic_xfer_only) {
+                local_irq_save(flags);
+                ret = tegra_bpmp_send_receive_atomic(MRQ_I2C,
+                                in, sizeof(*in), out, sizeof(*out));
+                local_irq_restore(flags);
+                return ret;
+        }
+
         return tegra_bpmp_send_receive(MRQ_I2C,
                               in, sizeof(*in), out, sizeof(*out));
 }
 
 static int tegra_bpmp_i2c_req(u32 adapter, struct mrq_i2c_data_in *in,
-                int data_in_size, struct mrq_i2c_data_out *out)
+                int data_in_size, struct mrq_i2c_data_out *out,
+                struct tegra_bpmp_i2c_dev *i2c_dev)
 {
         int r;
 
         in->req = MRQ_I2C_DATA_IN_REQ_I2C_REQ;
         in->data.i2c_req.adapter = adapter;
         in->data.i2c_req.data_in_size = data_in_size;
-        r = tegra_bpmp_i2c(in, out);
+        r = tegra_bpmp_i2c(in, out, i2c_dev);
         if (r) {
                 WARN_ON(r > 0);
                 return r;
@@ -222,14 +244,6 @@ static int tegra_bpmp_i2c_req(u32 adapter, struct mrq_i2c_data_in *in,
 struct tegra_bpmp_i2c_chipdata {
 };
 
-/**
- * struct tegra_i2c_dev - per device i2c context
- * @adapter: core i2c layer adapter information
- */
-struct tegra_bpmp_i2c_dev {
-        struct i2c_adapter adapter;
-        u32 bpmp_adapter_id;
-};
 
 static int tegra_bpmp_i2c_init(struct tegra_bpmp_i2c_dev *i2c_dev)
 {
@@ -303,7 +317,8 @@ static int tegra_bpmp_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
                 return size;
         }
 
-        ret = tegra_bpmp_i2c_req(i2c_dev->bpmp_adapter_id, &in, size, &out);
+        ret = tegra_bpmp_i2c_req(i2c_dev->bpmp_adapter_id, &in, size, &out,
+                        i2c_dev);
         if (ret < 0) {
                 dev_err(&i2c_dev->adapter.dev, "tegra_bpmp_i2c_req ret %d\n",
                         ret);