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intel_backlight: switch to INREG and OUTREG

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Use INREG and OUTREG instead of using mmio directly.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula 2015-04-15 15:39:55 +03:00
parent 510ac32db1
commit e9f4c5f9b9
1 changed files with 5 additions and 15 deletions
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20
tools/intel_backlight.c
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@ -36,24 +36,14 @@
/* XXX PCH only today */
static uint32_t reg_read(uint32_t reg)
{
return *(volatile uint32_t *)((volatile char*)mmio + reg);
}
static void reg_write(uint32_t reg, uint32_t val)
{
*(volatile uint32_t *)((volatile char*)mmio + reg) = val;
}
int main(int argc, char** argv)
{
uint32_t current, max;
intel_mmio_use_pci_bar(intel_get_pci_device());
current = reg_read(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
max = reg_read(BLC_PWM_PCH_CTL2) >> 16;
current = INREG(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
max = INREG(BLC_PWM_PCH_CTL2) >> 16;
printf ("current backlight value: %d%%\n", current * 100 / max);
@ -61,9 +51,9 @@ int main(int argc, char** argv)
uint32_t v = atoi (argv[1]) * max / 100;
if (v > max)
v = max;
reg_write(BLC_PWM_CPU_CTL,
(reg_read(BLC_PWM_CPU_CTL) &~ BACKLIGHT_DUTY_CYCLE_MASK) | v);
(void) reg_read(BLC_PWM_CPU_CTL);
OUTREG(BLC_PWM_CPU_CTL,
(INREG(BLC_PWM_CPU_CTL) &~ BACKLIGHT_DUTY_CYCLE_MASK) | v);
(void) INREG(BLC_PWM_CPU_CTL);
printf ("set backlight to %d%%\n", v * 100 / max);
}