From: thierry.reding@gmail.com (Thierry Reding) Date: Mon, 20 Mar 2017 15:14:34 +0100 Subject: [PATCH 3/5] soc/tegra: Move Tegra flowctrl driver In-Reply-To: <1489584715-23138-4-git-send-email-jonathanh@nvidia.com> References: <1489584715-23138-1-git-send-email-jonathanh@nvidia.com> <1489584715-23138-4-git-send-email-jonathanh@nvidia.com> Message-ID: <20170320141434.GC28203@ulmo.ba.sec> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Mar 15, 2017 at 01:31:53PM +0000, Jon Hunter wrote: [...] > +static int __init tegra_flowctrl_init(void) > +{ > + /* hardcoded fallback if device tree node is missing */ > + unsigned long base = 0x60007000; > + unsigned long size = SZ_4K; > + struct device_node *np; > + > + if (!soc_is_tegra()) > + return 0; > + > + np = of_find_matching_node(NULL, matches); > + if (np) { > + struct resource res; > + > + if (of_address_to_resource(np, 0, &res) == 0) { > + size = resource_size(&res); > + base = res.start; > + } > + > + of_node_put(np); > + } > + > + tegra_flowctrl_base = ioremap_nocache(base, size); > + > + if (!tegra_flowctrl_base) > + return -ENXIO; > + > + return 0; > +} > +early_initcall(tegra_flowctrl_init); Do we want to implement a hand-off to a proper driver at some point, similar to what we have for PMC? > diff --git a/include/soc/tegra/flowctrl.h b/include/soc/tegra/flowctrl.h [...] > +#ifndef __ASSEMBLY__ > +u32 flowctrl_read_cpu_csr(unsigned int cpuid); > +void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value); > +void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value); > + > +void flowctrl_cpu_suspend_enter(unsigned int cpuid); > +void flowctrl_cpu_suspend_exit(unsigned int cpuid); > +#endif Perhaps we want the same type of dummy functions scheme here for !SOC_TEGRA_FLOWCTRL that Arnd proposed for !SOC_TEGRA_PMC? > + > +#endif > -- > 2.7.4 > -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: not available URL: