Commit 6a52bc2b authored by Tony Lindgren's avatar Tony Lindgren
Browse files

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: default avatarTony Lindgren <tony@atomide.com>
parent 9d881361

drivers/bus/ti-sysc.c

+10 −0
Original line number Diff line number Diff line
@@ -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;

include/linux/platform_data/ti-sysc.h

+1 −0
Original line number Diff line number Diff line
@@ -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)