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drivers: dac: check if clock device is ready before accessing

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Add check for device_is_ready() before accessing clock control devices.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2022-08-08 13:32:50 +02:00 • committed by Carles Cufí
commit d4a2f316cb
1 changed files with 5 additions and 0 deletions
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5
drivers/dac/dac_stm32.c
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@ -121,6 +121,11 @@ static int dac_stm32_init(const struct device *dev)
/* enable clock for subsystem */ /* enable clock for subsystem */
const struct device *clk = DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE); const struct device *clk = DEVICE_DT_GET(STM32_CLOCK_CONTROL_NODE);
if (!device_is_ready(clk)) {
LOG_ERR("clock control device not ready");
return -ENODEV;
}
if (clock_control_on(clk, if (clock_control_on(clk,
(clock_control_subsys_t *) &cfg->pclken) != 0) { (clock_control_subsys_t *) &cfg->pclken) != 0) {
return -EIO; return -EIO;