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-rw-r--r--drivers/platform/chrome/cros_ec.c9
-rw-r--r--drivers/platform/chrome/cros_ec_i2c.c5
-rw-r--r--drivers/platform/chrome/cros_ec_ishtp.c4
-rw-r--r--drivers/platform/chrome/cros_ec_lpc.c4
-rw-r--r--drivers/platform/chrome/cros_ec_rpmsg.c4
-rw-r--r--drivers/platform/chrome/cros_ec_spi.c5
-rw-r--r--drivers/platform/chrome/cros_ec_uart.c4
-rw-r--r--include/linux/platform_data/cros_ec_proto.h14
8 files changed, 19 insertions, 30 deletions
diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index 25283a148ab9..da049068b6e9 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -38,6 +38,15 @@ struct cros_ec_device *cros_ec_device_alloc(struct device *dev)
if (!ec_dev)
return NULL;
+ ec_dev->din_size = sizeof(struct ec_host_response) +
+ sizeof(struct ec_response_get_protocol_info) +
+ EC_MAX_RESPONSE_OVERHEAD;
+ ec_dev->dout_size = sizeof(struct ec_host_request) +
+ sizeof(struct ec_params_rwsig_action) +
+ EC_MAX_REQUEST_OVERHEAD;
+
+ ec_dev->dev = dev;
+
return ec_dev;
}
EXPORT_SYMBOL(cros_ec_device_alloc);
diff --git a/drivers/platform/chrome/cros_ec_i2c.c b/drivers/platform/chrome/cros_ec_i2c.c
index ee3c5130ec3f..def1144a077e 100644
--- a/drivers/platform/chrome/cros_ec_i2c.c
+++ b/drivers/platform/chrome/cros_ec_i2c.c
@@ -297,16 +297,11 @@ static int cros_ec_i2c_probe(struct i2c_client *client)
return -ENOMEM;
i2c_set_clientdata(client, ec_dev);
- ec_dev->dev = dev;
ec_dev->priv = client;
ec_dev->irq = client->irq;
ec_dev->cmd_xfer = cros_ec_cmd_xfer_i2c;
ec_dev->pkt_xfer = cros_ec_pkt_xfer_i2c;
ec_dev->phys_name = client->adapter->name;
- ec_dev->din_size = sizeof(struct ec_host_response_i2c) +
- sizeof(struct ec_response_get_protocol_info);
- ec_dev->dout_size = sizeof(struct ec_host_request_i2c) +
- sizeof(struct ec_params_rwsig_action);
err = cros_ec_register(ec_dev);
if (err) {
diff --git a/drivers/platform/chrome/cros_ec_ishtp.c b/drivers/platform/chrome/cros_ec_ishtp.c
index c102a796670c..4e74e702c5a2 100644
--- a/drivers/platform/chrome/cros_ec_ishtp.c
+++ b/drivers/platform/chrome/cros_ec_ishtp.c
@@ -550,14 +550,10 @@ static int cros_ec_dev_init(struct ishtp_cl_data *client_data)
client_data->ec_dev = ec_dev;
dev->driver_data = ec_dev;
- ec_dev->dev = dev;
ec_dev->priv = client_data->cros_ish_cl;
ec_dev->cmd_xfer = NULL;
ec_dev->pkt_xfer = cros_ec_pkt_xfer_ish;
ec_dev->phys_name = dev_name(dev);
- ec_dev->din_size = sizeof(struct cros_ish_in_msg) +
- sizeof(struct ec_response_get_protocol_info);
- ec_dev->dout_size = sizeof(struct cros_ish_out_msg) + sizeof(struct ec_params_rwsig_action);
return cros_ec_register(ec_dev);
}
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c
index 30fa89b81666..78cfff80cdea 100644
--- a/drivers/platform/chrome/cros_ec_lpc.c
+++ b/drivers/platform/chrome/cros_ec_lpc.c
@@ -642,14 +642,10 @@ static int cros_ec_lpc_probe(struct platform_device *pdev)
return -ENOMEM;
platform_set_drvdata(pdev, ec_dev);
- ec_dev->dev = dev;
ec_dev->phys_name = dev_name(dev);
ec_dev->cmd_xfer = cros_ec_cmd_xfer_lpc;
ec_dev->pkt_xfer = cros_ec_pkt_xfer_lpc;
ec_dev->cmd_readmem = cros_ec_lpc_readmem;
- ec_dev->din_size = sizeof(struct ec_host_response) +
- sizeof(struct ec_response_get_protocol_info);
- ec_dev->dout_size = sizeof(struct ec_host_request) + sizeof(struct ec_params_rwsig_action);
ec_dev->priv = ec_lpc;
/*
diff --git a/drivers/platform/chrome/cros_ec_rpmsg.c b/drivers/platform/chrome/cros_ec_rpmsg.c
index 9ac2b923db6d..09bd9e49464e 100644
--- a/drivers/platform/chrome/cros_ec_rpmsg.c
+++ b/drivers/platform/chrome/cros_ec_rpmsg.c
@@ -224,14 +224,10 @@ static int cros_ec_rpmsg_probe(struct rpmsg_device *rpdev)
if (!ec_rpmsg)
return -ENOMEM;
- ec_dev->dev = dev;
ec_dev->priv = ec_rpmsg;
ec_dev->cmd_xfer = cros_ec_cmd_xfer_rpmsg;
ec_dev->pkt_xfer = cros_ec_pkt_xfer_rpmsg;
ec_dev->phys_name = dev_name(&rpdev->dev);
- ec_dev->din_size = sizeof(struct ec_host_response) +
- sizeof(struct ec_response_get_protocol_info);
- ec_dev->dout_size = sizeof(struct ec_host_request) + sizeof(struct ec_params_rwsig_action);
dev_set_drvdata(dev, ec_dev);
ec_rpmsg->rpdev = rpdev;
diff --git a/drivers/platform/chrome/cros_ec_spi.c b/drivers/platform/chrome/cros_ec_spi.c
index c778300a4145..28fa82f8cb07 100644
--- a/drivers/platform/chrome/cros_ec_spi.c
+++ b/drivers/platform/chrome/cros_ec_spi.c
@@ -757,16 +757,11 @@ static int cros_ec_spi_probe(struct spi_device *spi)
cros_ec_spi_dt_probe(ec_spi, dev);
spi_set_drvdata(spi, ec_dev);
- ec_dev->dev = dev;
ec_dev->priv = ec_spi;
ec_dev->irq = spi->irq;
ec_dev->cmd_xfer = cros_ec_cmd_xfer_spi;
ec_dev->pkt_xfer = cros_ec_pkt_xfer_spi;
ec_dev->phys_name = dev_name(&ec_spi->spi->dev);
- ec_dev->din_size = EC_MSG_PREAMBLE_COUNT +
- sizeof(struct ec_host_response) +
- sizeof(struct ec_response_get_protocol_info);
- ec_dev->dout_size = sizeof(struct ec_host_request) + sizeof(struct ec_params_rwsig_action);
ec_spi->last_transfer_ns = ktime_get_ns();
diff --git a/drivers/platform/chrome/cros_ec_uart.c b/drivers/platform/chrome/cros_ec_uart.c
index 1a7511b1bbe3..d5b37414ff12 100644
--- a/drivers/platform/chrome/cros_ec_uart.c
+++ b/drivers/platform/chrome/cros_ec_uart.c
@@ -276,14 +276,10 @@ static int cros_ec_uart_probe(struct serdev_device *serdev)
/* Initialize ec_dev for cros_ec */
ec_dev->phys_name = dev_name(dev);
- ec_dev->dev = dev;
ec_dev->priv = ec_uart;
ec_dev->irq = ec_uart->irq;
ec_dev->cmd_xfer = NULL;
ec_dev->pkt_xfer = cros_ec_uart_pkt_xfer;
- ec_dev->din_size = sizeof(struct ec_host_response) +
- sizeof(struct ec_response_get_protocol_info);
- ec_dev->dout_size = sizeof(struct ec_host_request) + sizeof(struct ec_params_rwsig_action);
serdev_device_set_client_ops(serdev, &cros_ec_uart_client_ops);
diff --git a/include/linux/platform_data/cros_ec_proto.h b/include/linux/platform_data/cros_ec_proto.h
index 3ec24f445c29..4d96cffbb9e3 100644
--- a/include/linux/platform_data/cros_ec_proto.h
+++ b/include/linux/platform_data/cros_ec_proto.h
@@ -33,12 +33,18 @@
/*
* Max bus-specific overhead incurred by request/responses.
- * I2C requires 1 additional byte for requests.
- * I2C requires 2 additional bytes for responses.
- * SPI requires up to 32 additional bytes for responses.
+ *
+ * Request:
+ * - I2C requires 1 byte (see struct ec_host_request_i2c).
+ * - ISHTP requires 4 bytes (see struct cros_ish_out_msg).
+ *
+ * Response:
+ * - I2C requires 2 bytes (see struct ec_host_response_i2c).
+ * - ISHTP requires 4 bytes (see struct cros_ish_in_msg).
+ * - SPI requires 32 bytes (see EC_MSG_PREAMBLE_COUNT).
*/
#define EC_PROTO_VERSION_UNKNOWN 0
-#define EC_MAX_REQUEST_OVERHEAD 1
+#define EC_MAX_REQUEST_OVERHEAD 4
#define EC_MAX_RESPONSE_OVERHEAD 32
/*
generated by cgit (git 2.34.1) at 2025-11-04 08:32:47 +0000