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| author | Tony Lindgren <tony@atomide.com> | 2021-09-21 12:42:25 +0300 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2021-09-21 12:50:38 +0300 |
| commit | 6a52bc2b81fa06b7ab98472c7d80644e8e071af6 (patch) | |
| tree | 986eb5fc8d85362ca3ed1bf921f05cd83e603f91 | |
| parent | 9d881361206ebcf6285c2ec2ef275aff80875347 (diff) | |
| download | linux-6a52bc2b81fa06b7ab98472c7d80644e8e071af6.tar.gz | |
bus: ti-sysc: Add quirk handling for reset on re-init
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>
| -rw-r--r-- | drivers/bus/ti-sysc.c | 10 | ||||
| -rw-r--r-- | include/linux/platform_data/ti-sysc.h | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index a73c707d14c3..cacdc4e301fb 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -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; diff --git a/include/linux/platform_data/ti-sysc.h b/include/linux/platform_data/ti-sysc.h index 989aa30c598d..f11244f5c0b6 100644 --- a/include/linux/platform_data/ti-sysc.h +++ b/include/linux/platform_data/ti-sysc.h @@ -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) |