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bus: ti-sysc: Add quirk handling for reset on re-init

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At least am335x gpmc module needs a reset in addition to re-init on resume.
Let's add a quirk handling for reset on re-init.

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2021-09-21 12:42:25 +03:00
parent 9d88136120
commit 6a52bc2b81
2 changed files with 11 additions and 0 deletions
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10
drivers/bus/ti-sysc.c
View file

@ -157,6 +157,7 @@ struct sysc {
static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
bool is_child);
static int sysc_reset(struct sysc *ddata);
static void sysc_write(struct sysc *ddata, int offset, u32 value)
{
@ -1440,6 +1441,15 @@ static int sysc_reinit_module(struct sysc *ddata, bool leave_enabled)
if (error)
dev_warn(dev, "reinit resume failed: %i\n", error);
/* Some modules like am335x gpmc need reset and restore of sysconfig */
if (ddata->cfg.quirks & SYSC_QUIRK_RESET_ON_CTX_LOST) {
error = sysc_reset(ddata);
if (error)
dev_warn(dev, "reinit reset failed: %i\n", error);
sysc_write_sysconfig(ddata, ddata->sysconfig);
}
if (leave_enabled)
return error;

1
include/linux/platform_data/ti-sysc.h
View file

@ -50,6 +50,7 @@ struct sysc_regbits {
s8 emufree_shift;
};
#define SYSC_QUIRK_RESET_ON_CTX_LOST BIT(29)
#define SYSC_QUIRK_REINIT_ON_CTX_LOST BIT(28)
#define SYSC_QUIRK_REINIT_ON_RESUME BIT(27)
#define SYSC_QUIRK_GPMC_DEBUG BIT(26)