@@ -97,7 +97,6 @@ struct ti_sci_desc {
* @node: list head
* @host_id: Host ID
* @users: Number of users of this instance
- * @is_suspending: Flag set to indicate in suspend path.
*/
struct ti_sci_info {
struct device *dev;
@@ -116,7 +115,6 @@ struct ti_sci_info {
u8 host_id;
/* protected by ti_sci_list_mutex */
int users;
- bool is_suspending;
};
#define cl_to_ti_sci_info(c) container_of(c, struct ti_sci_info, cl)
@@ -418,14 +416,14 @@ static inline int ti_sci_do_xfer(struct ti_sci_info *info,
ret = 0;
- if (!info->is_suspending) {
+ if (system_state <= SYSTEM_RUNNING) {
/* And we wait for the response. */
timeout = msecs_to_jiffies(info->desc->max_rx_timeout_ms);
if (!wait_for_completion_timeout(&xfer->done, timeout))
ret = -ETIMEDOUT;
} else {
/*
- * If we are suspending, we cannot use wait_for_completion_timeout
+ * If we are !running, we cannot use wait_for_completion_timeout
* during noirq phase, so we must manually poll the completion.
*/
ret = read_poll_timeout_atomic(try_wait_for_completion, done_state,
@@ -3281,35 +3279,6 @@ static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode,
return NOTIFY_BAD;
}
-static void ti_sci_set_is_suspending(struct ti_sci_info *info, bool is_suspending)
-{
- info->is_suspending = is_suspending;
-}
-
-static int ti_sci_suspend(struct device *dev)
-{
- struct ti_sci_info *info = dev_get_drvdata(dev);
- /*
- * We must switch operation to polled mode now as drivers and the genpd
- * layer may make late TI SCI calls to change clock and device states
- * from the noirq phase of suspend.
- */
- ti_sci_set_is_suspending(info, true);
-
- return 0;
-}
-
-static int ti_sci_resume(struct device *dev)
-{
- struct ti_sci_info *info = dev_get_drvdata(dev);
-
- ti_sci_set_is_suspending(info, false);
-
- return 0;
-}
-
-static DEFINE_SIMPLE_DEV_PM_OPS(ti_sci_pm_ops, ti_sci_suspend, ti_sci_resume);
-
/* Description for K2G */
static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = {
.default_host_id = 2,
@@ -3516,7 +3485,6 @@ static struct platform_driver ti_sci_driver = {
.driver = {
.name = "ti-sci",
.of_match_table = of_match_ptr(ti_sci_of_match),
- .pm = &ti_sci_pm_ops,
},
};
module_platform_driver(ti_sci_driver);
Commit b9e8a7d950ff ("firmware: ti_sci: Switch transport to polled mode during system suspend") aims to resolve issues with tisci operations during system suspend operation. However, the system may enter a no_irq stage in various other usage modes, including power-off and restart. To determine if polling mode is appropriate, use the system_state instead. While at this, drop the unused is_suspending state variable and related helpers. Reported-by: Francesco Dolcini <francesco@dolcini.it> Reported-by: Wadim Egorov <w.egorov@phytec.de> Closes: https://lore.kernel.org/all/ZGeHMjlnob2GFyHF@francesco-nb.int.toradex.com/ Fixes: b9e8a7d950ff ("firmware: ti_sci: Switch transport to polled mode during system suspend") Tested-by: Francesco Dolcini <francesco.dolcini@toradex.com> # Toradex Verdin AM62 Signed-off-by: Nishanth Menon <nm@ti.com> --- Changes Since V1: * Fixed up comments from Francesco: * Fat fingered miss part of the change causing a build break * Added Fixes, s/Link/Closes * Picked up Tested-by Note: there are two reported by, and a closes link - which confuses checkpatch a little, but I am going to assume it is ok. V1: https://lore.kernel.org/all/20230619131236.3285069-1-nm@ti.com/ drivers/firmware/ti_sci.c | 36 ++---------------------------------- 1 file changed, 2 insertions(+), 34 deletions(-)