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Merge "usb: dwc3-msm: Add interconnect bus voting through dt-node"

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qctecmdr 2020-10-16 10:09:27 -07:00 • committed by Gerrit - the friendly Code Review server
commit cd758fb1b9
1 changed files with 74 additions and 1 deletions
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75
drivers/usb/dwc3/dwc3-msm.c
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@ -303,6 +303,13 @@ enum msm_usb_irq {
USB_MAX_IRQ
};
enum icc_paths {
USB_DDR,
USB_IPA,
DDR_USB,
USB_MAX_PATH
};
enum bus_vote {
BUS_VOTE_NONE,
BUS_VOTE_NOMINAL,
@ -315,7 +322,7 @@ static const char * const icc_path_names[] = {
"usb-ddr", "usb-ipa", "ddr-usb",
};
static const struct {
static struct {
u32 avg, peak;
} bus_vote_values[BUS_VOTE_MAX][3] = {
/* usb_ddr avg/peak, usb_ipa avg/peak, apps_usb avg/peak */
@ -3948,6 +3955,68 @@ static ssize_t bus_vote_store(struct device *dev,
}
static DEVICE_ATTR_RW(bus_vote);
static int dwc3_msm_interconnect_vote_populate(struct dwc3_msm *mdwc)
{
int ret_nom = 0, i = 0, j = 0, count = 0;
int ret_svs = 0, ret = 0;
u32 *vv_nom, *vv_svs;
count = of_property_count_strings(mdwc->dev->of_node,
"interconnect-names");
if (count < 0) {
dev_err(mdwc->dev, "No interconnects found.\n");
return -EINVAL;
}
/* 2 signifies the two types of values avg & peak */
vv_nom = kzalloc(count * 2 * sizeof(*vv_nom), GFP_KERNEL);
if (!vv_nom)
return -ENOMEM;
vv_svs = kzalloc(count * 2 * sizeof(*vv_svs), GFP_KERNEL);
if (!vv_svs)
return -ENOMEM;
/* of_property_read_u32_array returns 0 on success */
ret_nom = of_property_read_u32_array(mdwc->dev->of_node,
"qcom,interconnect-values-nom",
vv_nom, count * 2);
if (ret_nom) {
dev_err(mdwc->dev, "Nominal values not found.\n");
ret = ret_nom;
goto icc_err;
}
ret_svs = of_property_read_u32_array(mdwc->dev->of_node,
"qcom,interconnect-values-svs",
vv_svs, count * 2);
if (ret_svs) {
dev_err(mdwc->dev, "Svs values not found.\n");
ret = ret_svs;
goto icc_err;
}
for (i = USB_DDR; i < count && i < USB_MAX_PATH; i++) {
/* Updating votes NOMINAL */
bus_vote_values[BUS_VOTE_NOMINAL][i].avg
= vv_nom[j];
bus_vote_values[BUS_VOTE_NOMINAL][i].peak
= vv_nom[j+1];
/* Updating votes SVS */
bus_vote_values[BUS_VOTE_SVS][i].avg
= vv_svs[j];
bus_vote_values[BUS_VOTE_SVS][i].peak
= vv_svs[j+1];
j += 2;
}
icc_err:
/* freeing the temporary resource */
kfree(vv_nom);
kfree(vv_svs);
return ret;
}
static int dwc_dpdm_cb(struct notifier_block *nb, unsigned long evt, void *p)
{
struct dwc3_msm *mdwc = container_of(nb, struct dwc3_msm, dpdm_nb);
@ -4319,6 +4388,10 @@ static int dwc3_msm_probe(struct platform_device *pdev)
goto put_dwc3;
}
ret = dwc3_msm_interconnect_vote_populate(mdwc);
if (ret)
dev_err(&pdev->dev, "Dynamic voting failed\n");
/* use default as nominal bus voting */
mdwc->default_bus_vote = BUS_VOTE_NOMINAL;
ret = of_property_read_u32(node, "qcom,default-bus-vote",