f8d1123934
Add IT5570E register that controls when the down counters are updated. Set them to update when they reach 0, instead of immediately when DCRi is written. Fixes keyboard color changing when changing brightness levels if not using 0xFF for an RGB value. Signed-off-by: Tim Crawford <tcrawford@system76.com>
37 lines
695 B
C
37 lines
695 B
C
// SPDX-License-Identifier: GPL-3.0-only
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#include <board/pwm.h>
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#include <common/macro.h>
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void pwm_init(void) {
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// Set T0CHSEL to TACH0A and T1CHSEL to TACH1A
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TSWCTLR = 0;
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// Disable PWM
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ZTIER = 0;
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// Set prescalar clock frequency to EC clock
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PCFSR = 0b01;
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// Use C0CPRS and CTR0 for all channels
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PCSSGL = 0;
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PCSSGH = 0;
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// Set clock prescaler to 0 + 1
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C0CPRS = 0;
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// Set cycle time to 255 + 1
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CTR0 = 255;
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// Turn off CPU fan (temperature control in peci_get_fan_duty)
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DCR2 = 0;
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#ifdef it5570e
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// Reload counters when they reach 0 instead of immediately
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PWMLCCR = 0xFF;
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#endif
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// Enable PWM
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ZTIER = BIT(1);
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}
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