github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 17:47:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

clk: qcom: gdsc: Support enabling interconnect path for power domain

Browse Source 
On newer SoCs like Milos the CAMSS_TOP_GDSC power domains requires the
enablement of the multimedia NoC, otherwise the GDSC will be stuck on
'off'.

Add support for getting an interconnect path as specified in the SoC
clock driver, and enabling/disabling that interconnect path when the
GDSC is being enabled/disabled.

Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Link: https://lore.kernel.org/r/20260501-milos-camcc-icc-v2-3-bb83c1256cc3@fairphone.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Luca Weiss 2026-05-01 11:18:31 +02:00 committed by Bjorn Andersson
parent 7e622e74d2
commit bd09d87c55
2 changed files with 38 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/clk/qcom/gdsc.c
View File

@ -7,6 +7,7 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/interconnect.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/ktime.h>
@ -147,6 +148,12 @@ static int gdsc_toggle_logic(struct gdsc *sc, enum gdsc_status status,
return ret;
}
if (status == GDSC_ON) {
ret = icc_set_bw(sc->icc_path, 1, 1);
if (ret)
goto err_disable_supply;
}
ret = gdsc_update_collapse_bit(sc, status == GDSC_OFF);
/* If disabling votable gdscs, don't poll on status */
@ -177,6 +184,12 @@ static int gdsc_toggle_logic(struct gdsc *sc, enum gdsc_status status,
ret = gdsc_poll_status(sc, status);
WARN(ret, "%s status stuck at 'o%s'", sc->pd.name, status ? "ff" : "n");
if (!ret && status == GDSC_OFF) {
ret = icc_set_bw(sc->icc_path, 0, 0);
if (ret)
return ret;
}
if (!ret && status == GDSC_OFF && sc->rsupply) {
ret = regulator_disable(sc->rsupply);
if (ret < 0)
@ -184,6 +197,12 @@ static int gdsc_toggle_logic(struct gdsc *sc, enum gdsc_status status,
}
return ret;
err_disable_supply:
if (status == GDSC_ON && sc->rsupply)
regulator_disable(sc->rsupply);
return ret;
}
static inline int gdsc_deassert_reset(struct gdsc *sc)
@ -584,6 +603,20 @@ int gdsc_register(struct gdsc_desc *desc,
if (!data->domains)
return -ENOMEM;
for (i = 0; i < num; i++) {
if (!scs[i] || !scs[i]->needs_icc)
continue;
scs[i]->icc_path = devm_of_icc_get_by_index(dev, scs[i]->icc_path_index);
if (IS_ERR(scs[i]->icc_path)) {
ret = PTR_ERR(scs[i]->icc_path);
if (ret != -ENODEV)
return ret;
scs[i]->icc_path = NULL;
}
}
for (i = 0; i < num; i++) {
if (!scs[i] || !scs[i]->supply)
continue;

5
drivers/clk/qcom/gdsc.h
View File

@ -9,6 +9,7 @@
#include <linux/err.h>
#include <linux/pm_domain.h>
struct icc_path;
struct regmap;
struct regulator;
struct reset_controller_dev;
@ -74,6 +75,10 @@ struct gdsc {
const char *supply;
struct regulator *rsupply;
bool needs_icc;
unsigned int icc_path_index;
struct icc_path *icc_path;
};
struct gdsc_desc {