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Date: Tue, 17 Jun 2014 20:42:14 -0700
From: Simon Glass <sjg@...omium.org>
To: Doug Anderson <dianders@...omium.org>
Cc: Lee Jones <lee.jones@...aro.org>,
Andrew Bresticker <abrestic@...omium.org>,
Stephen Warren <swarren@...dotorg.org>,
Olof Johansson <olof@...om.net>,
Sonny Rao <sonnyrao@...omium.org>,
linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
Bill Richardson <wfrichar@...omium.org>,
Wolfram Sang <wsa@...-dreams.de>,
Mark Brown <broonie@...nel.org>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Samuel Ortiz <sameo@...ux.intel.com>,
Vincent Palatin <vpalatin@...omium.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
lk <linux-kernel@...r.kernel.org>,
"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>
Subject: Re: [PATCH 08/10] mfd: cros_ec: cleanup: Remove EC wrapper functions
Hi Doug,
On 16 June 2014 14:39, Doug Anderson <dianders@...omium.org> wrote:
> From: Bill Richardson <wfrichar@...omium.org>
>
> Remove the three wrapper functions that talk to the EC without passing all
> the desired arguments and just use the underlying communication function
> that passes everything in a struct intead.
>
> This is internal code refactoring only. Nothing should change.
>
> Signed-off-by: Bill Richardson <wfrichar@...omium.org>
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> ---
> drivers/i2c/busses/i2c-cros-ec-tunnel.c | 15 +++++++++++----
> drivers/input/keyboard/cros_ec_keyb.c | 14 ++++++++++++--
> drivers/mfd/cros_ec.c | 32 --------------------------------
> include/linux/mfd/cros_ec.h | 19 ++++++-------------
> 4 files changed, 29 insertions(+), 51 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-cros-ec-tunnel.c b/drivers/i2c/busses/i2c-cros-ec-tunnel.c
> index 8e7a714..dd07818 100644
> --- a/drivers/i2c/busses/i2c-cros-ec-tunnel.c
> +++ b/drivers/i2c/busses/i2c-cros-ec-tunnel.c
> @@ -183,6 +183,7 @@ static int ec_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg i2c_msgs[],
> u8 *request = NULL;
> u8 *response = NULL;
> int result;
> + struct cros_ec_command msg;
>
> request_len = ec_i2c_count_message(i2c_msgs, num);
> if (request_len < 0) {
> @@ -218,9 +219,15 @@ static int ec_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg i2c_msgs[],
> }
>
> ec_i2c_construct_message(request, i2c_msgs, num, bus_num);
> - result = bus->ec->command_sendrecv(bus->ec, EC_CMD_I2C_PASSTHRU,
> - request, request_len,
> - response, response_len);
> +
> + msg.version = 0;
> + msg.command = EC_CMD_I2C_PASSTHRU;
> + msg.outdata = request;
> + msg.outsize = request_len;
> + msg.indata = response;
> + msg.insize = response_len;
> +
> + result = bus->ec->cmd_xfer(bus->ec, &msg);
> if (result)
> goto exit;
>
> @@ -258,7 +265,7 @@ static int ec_i2c_probe(struct platform_device *pdev)
> u32 remote_bus;
> int err;
>
> - if (!ec->command_sendrecv) {
> + if (!ec->cmd_xfer) {
> dev_err(dev, "Missing sendrecv\n");
> return -EINVAL;
> }
> diff --git a/drivers/input/keyboard/cros_ec_keyb.c b/drivers/input/keyboard/cros_ec_keyb.c
> index 4083796..dc37b6b 100644
> --- a/drivers/input/keyboard/cros_ec_keyb.c
> +++ b/drivers/input/keyboard/cros_ec_keyb.c
> @@ -191,8 +191,18 @@ static void cros_ec_keyb_close(struct input_dev *dev)
>
> static int cros_ec_keyb_get_state(struct cros_ec_keyb *ckdev, uint8_t *kb_state)
> {
> - return ckdev->ec->command_recv(ckdev->ec, EC_CMD_MKBP_STATE,
> - kb_state, ckdev->cols);
> + int ret;
> + struct cros_ec_command msg = {
> + .version = 0,
> + .command = EC_CMD_MKBP_STATE,
> + .outdata = NULL,
> + .outsize = 0,
> + .indata = kb_state,
> + .insize = ckdev->cols,
> + };
> +
> + ret = ckdev->ec->cmd_xfer(ckdev->ec, &msg);
Do we need ret?
> + return ret;
> }
>
> static int cros_ec_keyb_work(struct notifier_block *nb,
> diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
> index d242714..6dd91e9 100644
> --- a/drivers/mfd/cros_ec.c
> +++ b/drivers/mfd/cros_ec.c
> @@ -44,34 +44,6 @@ int cros_ec_prepare_tx(struct cros_ec_device *ec_dev,
> }
> EXPORT_SYMBOL(cros_ec_prepare_tx);
>
> -static int cros_ec_command_sendrecv(struct cros_ec_device *ec_dev,
> - uint16_t cmd, void *out_buf, int out_len,
> - void *in_buf, int in_len)
> -{
> - struct cros_ec_command msg;
> -
> - msg.version = cmd >> 8;
> - msg.command = cmd & 0xff;
> - msg.outdata = out_buf;
> - msg.outsize = out_len;
> - msg.indata = in_buf;
> - msg.insize = in_len;
> -
> - return ec_dev->cmd_xfer(ec_dev, &msg);
> -}
> -
> -static int cros_ec_command_recv(struct cros_ec_device *ec_dev,
> - uint16_t cmd, void *buf, int buf_len)
> -{
> - return cros_ec_command_sendrecv(ec_dev, cmd, NULL, 0, buf, buf_len);
> -}
> -
> -static int cros_ec_command_send(struct cros_ec_device *ec_dev,
> - uint16_t cmd, void *buf, int buf_len)
> -{
> - return cros_ec_command_sendrecv(ec_dev, cmd, buf, buf_len, NULL, 0);
> -}
> -
> static irqreturn_t ec_irq_thread(int irq, void *data)
> {
> struct cros_ec_device *ec_dev = data;
> @@ -104,10 +76,6 @@ int cros_ec_register(struct cros_ec_device *ec_dev)
>
> BLOCKING_INIT_NOTIFIER_HEAD(&ec_dev->event_notifier);
>
> - ec_dev->command_send = cros_ec_command_send;
> - ec_dev->command_recv = cros_ec_command_recv;
> - ec_dev->command_sendrecv = cros_ec_command_sendrecv;
> -
> if (ec_dev->din_size) {
> ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL);
> if (!ec_dev->din)
> diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
> index 2b0c598..60c0880 100644
> --- a/include/linux/mfd/cros_ec.h
> +++ b/include/linux/mfd/cros_ec.h
> @@ -63,9 +63,10 @@ struct cros_ec_command {
> * @was_wake_device: true if this device was set to wake the system from
> * sleep at the last suspend
> * @event_notifier: interrupt event notifier for transport devices
> - * @command_send: send a command
> - * @command_recv: receive a response
> - * @command_sendrecv: send a command and receive a response
> + * @cmd_xfer: send command to EC and get response
> + * Returns 0 if the communication succeeded, but that doesn't mean the EC
> + * was happy with the command it got. Caller should check msg.result for
> + * the EC's result code.
> *
> * @priv: Private data
> * @irq: Interrupt to use
> @@ -83,7 +84,6 @@ struct cros_ec_command {
> * @parent: pointer to parent device (e.g. i2c or spi device)
> * @wake_enabled: true if this device can wake the system from sleep
> * @lock: one transaction at a time
> - * @cmd_xfer: low-level channel to the EC
> */
> struct cros_ec_device {
>
> @@ -94,13 +94,8 @@ struct cros_ec_device {
> bool was_wake_device;
> struct class *cros_class;
> struct blocking_notifier_head event_notifier;
> - int (*command_send)(struct cros_ec_device *ec,
> - uint16_t cmd, void *out_buf, int out_len);
> - int (*command_recv)(struct cros_ec_device *ec,
> - uint16_t cmd, void *in_buf, int in_len);
> - int (*command_sendrecv)(struct cros_ec_device *ec,
> - uint16_t cmd, void *out_buf, int out_len,
> - void *in_buf, int in_len);
> + int (*cmd_xfer)(struct cros_ec_device *ec,
> + struct cros_ec_command *msg);
>
> /* These are used to implement the platform-specific interface */
> void *priv;
> @@ -112,8 +107,6 @@ struct cros_ec_device {
> struct device *parent;
> bool wake_enabled;
> struct mutex lock;
> - int (*cmd_xfer)(struct cros_ec_device *ec,
> - struct cros_ec_command *msg);
Seems odd - maybe this line move of cmd_xfer() should be in an earlier patch?
Regards,
Simon
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