Hi Paul, On Tuesday 06 January 2015 07:34 AM, Paul Walmsley wrote: > > Roger, Lokesh, could you try this one instead? Yep, the below patch works on AM437x. Boot logs here: http://paste.ubuntu.com/9680938/ Thanks and regards, Lokesh > > It passes all the basic tests here except it does not boot on the 4460 > VAR-SOM-OM - unclear why at this point - but it would be good to see if it > works on your AM4372 boards, since I don't have that one. > > Test logs are here: > > http://www.pwsan.com/omap/testlogs/hwmod_skip_only_remap_v3.19-rc/20150105171744/ > > > - Paul > > > From 4f2e13bd2181e0ebede3aabc484aa2339830748a Mon Sep 17 00:00:00 2001 > From: Paul Walmsley <paul@xxxxxxxxx> > Date: Mon, 5 Jan 2015 15:49:57 -0700 > Subject: [PATCH] Only skip ioremap() if IP block does not have OCP header > registers. Experimental. > > --- > arch/arm/mach-omap2/omap_hwmod.c | 33 +++++++++++++++++++++------------ > 1 file changed, 21 insertions(+), 12 deletions(-) > > diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c > index cbb908dc5cf0..03df8833d399 100644 > --- a/arch/arm/mach-omap2/omap_hwmod.c > +++ b/arch/arm/mach-omap2/omap_hwmod.c > @@ -1938,6 +1938,8 @@ static int _reset(struct omap_hwmod *oh) > pr_debug("omap_hwmod: %s: resetting\n", oh->name); > > if (oh->class->reset) { > + WARN(!oh->_mpu_rt_va, "Attempt to call custom reset with no MPU register target ioremapped: %s", > + oh->name); > r = oh->class->reset(oh); > } else { > if (oh->rst_lines_cnt > 0) { > @@ -2358,15 +2360,19 @@ static int of_dev_hwmod_lookup(struct device_node *np, > } > > /** > - * _init_mpu_rt_base - populate the virtual address for a hwmod > + * _init_mpu_rt_base - populate the MPU port and virtual address > * @oh: struct omap_hwmod * to locate the virtual address > * @data: (unused, caller should pass NULL) > * @index: index of the reg entry iospace in device tree > * @np: struct device_node * of the IP block's device node in the DT data > * > - * Cache the virtual address used by the MPU to access this IP block's > - * registers. This address is needed early so the OCP registers that > - * are part of the device's address space can be ioremapped properly. > + * Cache the interconnect target port and the virtual address used by > + * the MPU to access this IP block's registers. The address is needed > + * early so the OCP registers that are part of the device's address > + * space can be ioremapped properly. The presence or absence of the > + * interconnect target port also indicates whether the hwmod code > + * should wait for the IP block to indicate readiness after it is > + * enabled. > * > * Returns 0 on success, -EINVAL if an invalid hwmod is passed, and > * -ENXIO on absent or invalid register target address space. > @@ -2385,6 +2391,13 @@ static int __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data, > if (oh->_int_flags & _HWMOD_NO_MPU_PORT) > return -ENXIO; > > + /* > + * If there's no need for the hwmod code to read or write to > + * the IP block registers, bail out early before the ioremap() > + */ > + if (!oh->class->sysc) > + return 0; > + > mem = _find_mpu_rt_addr_space(oh); > if (!mem) { > pr_debug("omap_hwmod: %s: no MPU register target found\n", > @@ -2451,14 +2464,10 @@ static int __init _init(struct omap_hwmod *oh, void *data) > oh->name, np->name); > } > > - if (oh->class->sysc) { > - r = _init_mpu_rt_base(oh, NULL, index, np); > - if (r < 0) { > - WARN(1, "omap_hwmod: %s: doesn't have mpu register target base\n", > - oh->name); > - return 0; > - } > - } > + r = _init_mpu_rt_base(oh, NULL, index, np); > + if (r < 0) > + pr_debug("omap_hwmod: %s: doesn't have mpu register target base\n", > + oh->name); > > r = _init_clocks(oh, NULL); > if (r < 0) { > -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
