From 062476f24aa7cf714169342cc50626fd9bbb93da Mon Sep 17 00:00:00 2001 From: Javier Martinez Canillas Date: Tue, 9 Jun 2015 13:04:44 +0200 Subject: mfd: cros_ec: Move protocol helpers out of the MFD driver The MFD driver should only have the logic to instantiate its child devices and setup any shared resources that will be used by the subdevices drivers. The cros_ec MFD is more complex than expected since it also has helpers to communicate with the EC. So the driver will only get more bigger as other protocols are supported in the future. So move the communication protocol helpers to its own driver as drivers/platform/chrome/cros_ec_proto.c. Suggested-by: Lee Jones Signed-off-by: Javier Martinez Canillas Tested-by: Heiko Stuebner Acked-by: Lee Jones Acked-by: Olof Johansson Signed-off-by: Lee Jones --- drivers/mfd/Kconfig | 6 ++-- drivers/mfd/cros_ec.c | 96 --------------------------------------------------- 2 files changed, 4 insertions(+), 98 deletions(-) (limited to 'drivers/mfd') diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index d5ad04d..cf3b86d 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -94,6 +94,8 @@ config MFD_AXP20X config MFD_CROS_EC tristate "ChromeOS Embedded Controller" select MFD_CORE + select CHROME_PLATFORMS + select CROS_EC_PROTO help If you say Y here you get support for the ChromeOS Embedded Controller (EC) providing keyboard, battery and power services. @@ -102,7 +104,7 @@ config MFD_CROS_EC config MFD_CROS_EC_I2C tristate "ChromeOS Embedded Controller (I2C)" - depends on MFD_CROS_EC && I2C + depends on MFD_CROS_EC && CROS_EC_PROTO && I2C help If you say Y here, you get support for talking to the ChromeOS @@ -112,7 +114,7 @@ config MFD_CROS_EC_I2C config MFD_CROS_EC_SPI tristate "ChromeOS Embedded Controller (SPI)" - depends on MFD_CROS_EC && SPI && OF + depends on MFD_CROS_EC && CROS_EC_PROTO && SPI && OF ---help--- If you say Y here, you get support for talking to the ChromeOS EC diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c index 4a0f6df..d857f6a 100644 --- a/drivers/mfd/cros_ec.c +++ b/drivers/mfd/cros_ec.c @@ -23,102 +23,6 @@ #include #include #include -#include -#include - -#define EC_COMMAND_RETRIES 50 - -int cros_ec_prepare_tx(struct cros_ec_device *ec_dev, - struct cros_ec_command *msg) -{ - uint8_t *out; - int csum, i; - - BUG_ON(msg->outsize > EC_PROTO2_MAX_PARAM_SIZE); - out = ec_dev->dout; - out[0] = EC_CMD_VERSION0 + msg->version; - out[1] = msg->command; - out[2] = msg->outsize; - csum = out[0] + out[1] + out[2]; - for (i = 0; i < msg->outsize; i++) - csum += out[EC_MSG_TX_HEADER_BYTES + i] = msg->data[i]; - out[EC_MSG_TX_HEADER_BYTES + msg->outsize] = (uint8_t)(csum & 0xff); - - return EC_MSG_TX_PROTO_BYTES + msg->outsize; -} -EXPORT_SYMBOL(cros_ec_prepare_tx); - -int cros_ec_check_result(struct cros_ec_device *ec_dev, - struct cros_ec_command *msg) -{ - switch (msg->result) { - case EC_RES_SUCCESS: - return 0; - case EC_RES_IN_PROGRESS: - dev_dbg(ec_dev->dev, "command 0x%02x in progress\n", - msg->command); - return -EAGAIN; - default: - dev_dbg(ec_dev->dev, "command 0x%02x returned %d\n", - msg->command, msg->result); - return 0; - } -} -EXPORT_SYMBOL(cros_ec_check_result); - -int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, - struct cros_ec_command *msg) -{ - int ret; - - mutex_lock(&ec_dev->lock); - ret = ec_dev->cmd_xfer(ec_dev, msg); - if (msg->result == EC_RES_IN_PROGRESS) { - int i; - struct cros_ec_command *status_msg; - struct ec_response_get_comms_status *status; - - status_msg = kmalloc(sizeof(*status_msg) + sizeof(*status), - GFP_KERNEL); - if (!status_msg) { - ret = -ENOMEM; - goto exit; - } - - status_msg->version = 0; - status_msg->command = EC_CMD_GET_COMMS_STATUS; - status_msg->insize = sizeof(*status); - status_msg->outsize = 0; - - /* - * Query the EC's status until it's no longer busy or - * we encounter an error. - */ - for (i = 0; i < EC_COMMAND_RETRIES; i++) { - usleep_range(10000, 11000); - - ret = ec_dev->cmd_xfer(ec_dev, status_msg); - if (ret < 0) - break; - - msg->result = status_msg->result; - if (status_msg->result != EC_RES_SUCCESS) - break; - - status = (struct ec_response_get_comms_status *) - status_msg->data; - if (!(status->flags & EC_COMMS_STATUS_PROCESSING)) - break; - } - - kfree(status_msg); - } -exit: - mutex_unlock(&ec_dev->lock); - - return ret; -} -EXPORT_SYMBOL(cros_ec_cmd_xfer); static const struct mfd_cell cros_devs[] = { { -- cgit v1.1