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drivers: video: ov2640: add clock rate control property #71962

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Merged
merged 1 commit into from
Apr 30, 2024
Merged

drivers: video: ov2640: add clock rate control property #71962

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4 changes: 3 additions & 1 deletion drivers/video/ov2640.c
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Original file line number Diff line number Diff line change
Expand Up @@ -435,6 +435,7 @@ struct ov2640_config {
#if DT_INST_NODE_HAS_PROP(0, reset_gpios)
struct gpio_dt_spec reset_gpio;
#endif
uint8_t clock_rate_control;
};

struct ov2640_data {
Expand Down Expand Up @@ -821,7 +822,7 @@ static int ov2640_set_resolution(const struct device *dev,

/* Set CLKRC */
ret |= ov2640_write_reg(&cfg->i2c, BANK_SEL, BANK_SEL_SENSOR);
ret |= ov2640_write_reg(&cfg->i2c, CLKRC, 0x87);
ret |= ov2640_write_reg(&cfg->i2c, CLKRC, cfg->clock_rate_control);

/* Write DSP input registers */
ov2640_write_all(dev, uxga_regs, ARRAY_SIZE(uxga_regs));
Expand Down Expand Up @@ -1030,6 +1031,7 @@ static const struct ov2640_config ov2640_cfg_0 = {
#if DT_INST_NODE_HAS_PROP(0, reset_gpios)
.reset_gpio = GPIO_DT_SPEC_INST_GET(0, reset_gpios),
#endif
.clock_rate_control = DT_INST_PROP(0, clock_rate_control),
};
static struct ov2640_data ov2640_data_0;

Expand Down
14 changes: 14 additions & 0 deletions dts/bindings/video/ovti,ov2640.yaml
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Expand Up @@ -12,4 +12,18 @@ properties:
The RESETn pin is asserted to disable the sensor causing a hard
reset. The sensor receives this as an active-low signal.

clock-rate-control:
type: int
default: 0x87
description: |
Define the value to the Clock Rate Control register. By changing
the system clock divide ratio and PLL, the frame rate and pixel
rate will change together.
Bit[7] Internal frequency doublers ON/OFF selection.
0: ON 1: OFF
Bit[6] Reserved
Bit[5:0] Clock divider.

CLK = XVCLK /(decimal value of CLKRC[5:0] + 1)

include: i2c-device.yaml