bus: ti-sysc: Fix missing reset delay handling

[ Upstream commit e709ed70d122e94cb426b1e1f905829eae19a009 ]

We have dts property for "ti,sysc-delay-us", and we're using it, but the
wait after OCP softreset only happens if devices are probed in legacy mode.

Let's add a delay after writing the OCP softreset when specified.

Fixes: e0db94fe87da ("bus: ti-sysc: Make OCP reset work for sysstatus and sysconfig reset bits")
Cc: Keerthy <j-keerthy@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 2b6670daf7fc70cd58ac287785d06990bf1cb61e..34bd9bf4e68ab11d430243a83b768c1f3030c7f0 100644 (file)
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1594,6 +1594,10 @@ static int sysc_reset(struct sysc *ddata)
        sysc_val |= sysc_mask;
        sysc_write(ddata, sysc_offset, sysc_val);
 
+       if (ddata->cfg.srst_udelay)
+               usleep_range(ddata->cfg.srst_udelay,
+                            ddata->cfg.srst_udelay * 2);
+
        if (ddata->clk_enable_quirk)
                ddata->clk_enable_quirk(ddata);