Roger, Lokesh, could you try this one instead? 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) { -- 2.1.4 -- 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
