i.MX7D: Compute clock frequency for the fixed frequency clocks.
CCM derived clocks will have to be added later. Signed-off-by: Jean-Christophe Dubois <jcd@tribudubois.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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@ -16,6 +16,10 @@
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#include "hw/misc/imx7_ccm.h"
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#include "hw/misc/imx7_ccm.h"
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#include "migration/vmstate.h"
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#include "migration/vmstate.h"
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#include "trace.h"
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#define CKIH_FREQ 24000000 /* 24MHz crystal input */
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static void imx7_analog_reset(DeviceState *dev)
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static void imx7_analog_reset(DeviceState *dev)
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{
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{
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IMX7AnalogState *s = IMX7_ANALOG(dev);
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IMX7AnalogState *s = IMX7_ANALOG(dev);
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@ -219,16 +223,43 @@ static const VMStateDescription vmstate_imx7_ccm = {
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static uint32_t imx7_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
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static uint32_t imx7_ccm_get_clock_frequency(IMXCCMState *dev, IMXClk clock)
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{
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{
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/*
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/*
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* This function is "consumed" by GPT emulation code, however on
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* This function is "consumed" by GPT emulation code. Some clocks
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* i.MX7 each GPT block can have their own clock root. This means
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* have fixed frequencies and we can provide requested frequency
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* that this functions needs somehow to know requester's identity
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* easily. However for CCM provided clocks (like IPG) each GPT
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* and the way to pass it: be it via additional IMXClk constants
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* timer can have its own clock root.
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* or by adding another argument to this method needs to be
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* This means we need additionnal information when calling this
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* figured out
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* function to know the requester's identity.
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*/
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*/
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qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Not implemented\n",
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uint32_t freq = 0;
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TYPE_IMX7_CCM, __func__);
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return 0;
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switch (clock) {
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case CLK_NONE:
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break;
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case CLK_32k:
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freq = CKIL_FREQ;
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break;
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case CLK_HIGH:
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freq = CKIH_FREQ;
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break;
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case CLK_IPG:
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case CLK_IPG_HIGH:
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/*
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* For now we don't have a way to figure out the device this
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* function is called for. Until then the IPG derived clocks
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* are left unimplemented.
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*/
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qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: Clock %d Not implemented\n",
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TYPE_IMX7_CCM, __func__, clock);
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break;
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default:
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qemu_log_mask(LOG_GUEST_ERROR, "[%s]%s: unsupported clock %d\n",
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TYPE_IMX7_CCM, __func__, clock);
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break;
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}
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trace_ccm_clock_freq(clock, freq);
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return freq;
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}
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}
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static void imx7_ccm_class_init(ObjectClass *klass, void *data)
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static void imx7_ccm_class_init(ObjectClass *klass, void *data)
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