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Merge patch series "Add AVS support for J721S2"

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Manorit Chawdhry <m-chawdhry@ti.com> says:

This series adds support for Adaptive voltage scaling on J721S2 device [0].

[0]: https://www.ti.com/lit/pdf/spruj28 (Section 5.2.4.1 AVS Support)

AVS Test for J721S2: https://gist.github.com/manorit2001/b2fd9f6764a863294d4aa0755c83c84f
Boot Test results: https://gist.github.com/manorit2001/d44e035552cb19aadeb0d928d5cb5f26

Link: https://lore.kernel.org/r/20241015-b4-upstream-j721s2-avs-v5-0-5c8087387dc5@ti.com
This commit is contained in:
Tom Rini
2024-10-21 17:52:40 -06:00
parent 33da135f7e 1b379f4a41
commit 63a3dbb7b9
20 changed files with 97 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/misc/k3_avs.c
View File

@@ -352,6 +352,9 @@ static int k3_avs_probe(struct udevice *dev)
struct k3_avs_privdata *priv;
struct vd_data *vd;
int ret;
ofnode node;
struct ofnode_phandle_args phandle_args;
int i = 0;
priv = dev_get_priv(dev);
priv->dev = dev;
@@ -367,6 +370,32 @@ static int k3_avs_probe(struct udevice *dev)
return -ENODEV;
for (vd = priv->vd_config->vds; vd->id >= 0; vd++) {
/* Get the clock and dev id for Jacinto platforms */
if (vd->id == J721E_VDD_MPU) {
node = ofnode_by_compatible(ofnode_null(), "ti,am654-rproc");
if (!ofnode_valid(node))
return -ENODEV;
i = ofnode_stringlist_search(node, "clock-names", "core");
if (i < 0)
return -ENODEV;
ret = ofnode_parse_phandle_with_args(node, "clocks",
"#clock-cells",
0, i,
&phandle_args);
if (ret) {
printf("Couldn't get the clock node, ret = %d\n", ret);
return ret;
}
vd->dev_id = phandle_args.args[0];
vd->clk_id = phandle_args.args[1];
debug("%s: MPU dev_id: %d, clk_id: %d", __func__,
vd->dev_id, vd->clk_id);
}
if (!(readl(AM6_VTM_DEVINFO(vd->id)) &
AM6_VTM_AVS0_SUPPORTED)) {
dev_warn(dev, "AVS-class 0 not supported for VD%d\n",
@@ -391,7 +420,10 @@ static int k3_avs_probe(struct udevice *dev)
if (vd->flags & VD_FLAG_INIT_DONE)
continue;
k3_avs_program_voltage(priv, vd, vd->opp);
ret = k3_avs_program_voltage(priv, vd, vd->opp);
if (ret)
dev_warn(dev, "Could not program AVS voltage for VD%d, vd->opp=%d, ret=%d\n",
vd->id, vd->opp, ret);
}
if (!device_is_compatible(priv->dev, "ti,am654-avs"))
@@ -460,6 +492,12 @@ static struct vd_data j721e_vd_data[] = {
{
.id = J721E_VDD_MPU,
.opp = AM6_OPP_NOM,
/*
* XXX: DEPRECATION WARNING: Around 2 u-boot versions
*
* These values will be picked up from DT, kept for backward
* compatibility
*/
.dev_id = 202, /* J721E_DEV_A72SS0_CORE0 */
.clk_id = 2, /* ARM clock */
.opps = {