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mediatek: support reading more than one byte of response

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There are commands that return more than one byte of response.

Signed-off-by: Sven Wegener <sven.wegener@stealer.net>
This commit is contained in:
Sven Wegener 2021-06-12 21:56:21 +02:00 committed by Daniel Golle
parent e9a22ce253
commit 7c852e7df5
1 changed files with 8 additions and 7 deletions
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15
target/linux/mediatek/files/drivers/leds/leds-ubnt-ledbar.c
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@ -41,16 +41,17 @@ struct ubnt_ledbar {
struct gpio_desc *enable_gpio; struct gpio_desc *enable_gpio;
}; };
static int ubnt_ledbar_perform_transaction(struct ubnt_ledbar *ledbar, static void ubnt_ledbar_perform_transaction(struct ubnt_ledbar *ledbar,
char *transaction) const char *transaction, int len,
char *result, int result_len)
{ {
int ret;
int i; int i;
for (i = 0; i < UBNT_LEDBAR_TRANSACTION_LENGTH; i++) for (i = 0; i < len; i++)
i2c_smbus_write_byte(ledbar->client, transaction[i]); i2c_smbus_write_byte(ledbar->client, transaction[i]);
return i2c_smbus_read_byte(ledbar->client); for (i = 0; i < result_len; i++)
result[i] = i2c_smbus_read_byte(ledbar->client);
} }
static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar) static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar)
@ -72,14 +73,14 @@ static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar)
msleep(10); msleep(10);
i2c_response = ubnt_ledbar_perform_transaction(ledbar, setup_msg); ubnt_ledbar_perform_transaction(ledbar, setup_msg, sizeof(setup_msg), &i2c_response, sizeof(i2c_response));
if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) { if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) {
dev_err(&ledbar->client->dev, "Error initializing LED transaction: %02hhx\n", i2c_response); dev_err(&ledbar->client->dev, "Error initializing LED transaction: %02hhx\n", i2c_response);
ret = -EINVAL; ret = -EINVAL;
goto out_gpio; goto out_gpio;
} }
i2c_response = ubnt_ledbar_perform_transaction(ledbar, led_msg); ubnt_ledbar_perform_transaction(ledbar, led_msg, sizeof(led_msg), &i2c_response, sizeof(i2c_response));
if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) { if (i2c_response != UBNT_LEDBAR_TRANSACTION_SUCCESS) {
dev_err(&ledbar->client->dev, "Failed LED transaction: %02hhx\n", i2c_response); dev_err(&ledbar->client->dev, "Failed LED transaction: %02hhx\n", i2c_response);
ret = -EINVAL; ret = -EINVAL;