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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>
(cherry picked from commit 7c852e7df5)
This commit is contained in:
Sven Wegener
2021-06-12 21:56:21 +02:00
committed by Daniel Golle
parent cd0283788f
commit b5665a0045
1 changed files with 8 additions and 7 deletions
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15
target/linux/mediatek/files-5.10/drivers/leds/leds-ubnt-ledbar.c
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@@ -41,16 +41,17 @@ struct ubnt_ledbar {
struct gpio_desc *enable_gpio;
};
static int ubnt_ledbar_perform_transaction(struct ubnt_ledbar *ledbar,
char *transaction)
static void ubnt_ledbar_perform_transaction(struct ubnt_ledbar *ledbar,
const char *transaction, int len,
char *result, int result_len)
{
int ret;
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]);
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)
@@ -72,14 +73,14 @@ static int ubnt_ledbar_apply_state(struct ubnt_ledbar *ledbar)
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) {
dev_err(&ledbar->client->dev, "Error initializing LED transaction: %02hhx\n", i2c_response);
ret = -EINVAL;
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) {
dev_err(&ledbar->client->dev, "Failed LED transaction: %02hhx\n", i2c_response);
ret = -EINVAL;