From patchwork Wed Oct 9 15:30:34 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 3009471 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 040E39F2B7 for ; Wed, 9 Oct 2013 15:32:52 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B4E8520257 for ; Wed, 9 Oct 2013 15:32:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA14E2021E for ; Wed, 9 Oct 2013 15:32:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753834Ab3JIPci (ORCPT ); Wed, 9 Oct 2013 11:32:38 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:41773 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753074Ab3JIPcg (ORCPT ); Wed, 9 Oct 2013 11:32:36 -0400 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id r99FWCKD014124; Wed, 9 Oct 2013 10:32:12 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id r99FWCDV007617; Wed, 9 Oct 2013 10:32:12 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.2.342.3; Wed, 9 Oct 2013 10:32:12 -0500 Received: from sokoban.tieu.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id r99FW0a6007684; Wed, 9 Oct 2013 10:32:09 -0500 From: Tero Kristo To: , , , , , , CC: , Subject: [PATCHv8 03/36] CLK: TI: add autoidle support Date: Wed, 9 Oct 2013 18:30:34 +0300 Message-ID: <1381332668-962-4-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1381332668-962-1-git-send-email-t-kristo@ti.com> References: <1381332668-962-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP TI clk driver now routes some of the basic clocks through own registration routine to allow autoidle support. This routine just checks a couple of device node properties and adds autoidle support if required, and just passes the registration forward to basic clocks. Signed-off-by: Tero Kristo Tested-by: Nishanth Menon Acked-by: Tony Lindgren --- arch/arm/mach-omap2/clock.c | 6 +++ drivers/clk/ti/Makefile | 2 +- drivers/clk/ti/autoidle.c | 107 +++++++++++++++++++++++++++++++++++++++++++ include/linux/clk/ti.h | 9 ++++ 4 files changed, 123 insertions(+), 1 deletion(-) create mode 100644 drivers/clk/ti/autoidle.c diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c index 0c38ca9..223f432b 100644 --- a/arch/arm/mach-omap2/clock.c +++ b/arch/arm/mach-omap2/clock.c @@ -520,6 +520,9 @@ int omap2_clk_enable_autoidle_all(void) list_for_each_entry(c, &clk_hw_omap_clocks, node) if (c->ops && c->ops->allow_idle) c->ops->allow_idle(c); + + of_ti_clk_allow_autoidle_all(); + return 0; } @@ -539,6 +542,9 @@ int omap2_clk_disable_autoidle_all(void) list_for_each_entry(c, &clk_hw_omap_clocks, node) if (c->ops && c->ops->deny_idle) c->ops->deny_idle(c); + + of_ti_clk_deny_autoidle_all(); + return 0; } diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile index 05af5d8..533efb4 100644 --- a/drivers/clk/ti/Makefile +++ b/drivers/clk/ti/Makefile @@ -1,3 +1,3 @@ ifneq ($(CONFIG_OF),) -obj-y += clk.o dpll.o +obj-y += clk.o dpll.o autoidle.o endif diff --git a/drivers/clk/ti/autoidle.c b/drivers/clk/ti/autoidle.c new file mode 100644 index 0000000..ccac33c --- /dev/null +++ b/drivers/clk/ti/autoidle.c @@ -0,0 +1,107 @@ +/* + * TI clock autoidle support + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * Tero Kristo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +struct clk_ti_autoidle { + void __iomem *reg; + u8 shift; + u8 flags; + const char *name; + struct list_head node; +}; + +#define AUTOIDLE_LOW 0x1 + +static LIST_HEAD(autoidle_clks); + +static void ti_allow_autoidle(struct clk_ti_autoidle *clk) +{ + u32 val; + + val = readl(clk->reg); + + if (clk->flags & AUTOIDLE_LOW) + val &= ~(1 << clk->shift); + else + val |= (1 << clk->shift); + + writel(val, clk->reg); +} + +static void ti_deny_autoidle(struct clk_ti_autoidle *clk) +{ + u32 val; + + val = readl(clk->reg); + + if (clk->flags & AUTOIDLE_LOW) + val |= (1 << clk->shift); + else + val &= ~(1 << clk->shift); + + writel(val, clk->reg); +} + +void of_ti_clk_allow_autoidle_all(void) +{ + struct clk_ti_autoidle *c; + + list_for_each_entry(c, &autoidle_clks, node) + ti_allow_autoidle(c); +} + +void of_ti_clk_deny_autoidle_all(void) +{ + struct clk_ti_autoidle *c; + + list_for_each_entry(c, &autoidle_clks, node) + ti_deny_autoidle(c); +} + +void __init of_ti_autoidle_setup(struct device_node *node) +{ + u32 shift; + void __iomem *reg; + struct clk_ti_autoidle *clk; + + if (of_property_read_u32(node, "ti,autoidle-shift", &shift)) + return; + + reg = of_iomap(node, 0); + + clk = kzalloc(sizeof(*clk), GFP_KERNEL); + + if (!clk) { + pr_err("%s: kzalloc failed\n", __func__); + return; + } + + clk->shift = shift; + clk->name = node->name; + clk->reg = reg; + + if (of_property_read_bool(node, "ti,autoidle-low")) + clk->flags |= AUTOIDLE_LOW; + + list_add(&clk->node, &autoidle_clks); +} diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h index c89574e..6d552c1 100644 --- a/include/linux/clk/ti.h +++ b/include/linux/clk/ti.h @@ -180,6 +180,15 @@ int omap3_dpll4_set_rate(struct clk_hw *clk, unsigned long rate, unsigned long parent_rate); void ti_dt_clocks_register(struct ti_dt_clk *oclks); +void of_ti_autoidle_setup(struct device_node *node); + +#ifdef CONFIG_OF +void of_ti_clk_allow_autoidle_all(void); +void of_ti_clk_deny_autoidle_all(void); +#else +static inline void of_ti_clk_allow_autoidle_all(void) { } +static inline void of_ti_clk_deny_autoidle_all(void) { } +#endif extern const struct clk_hw_omap_ops clkhwops_omap3_dpll; extern const struct clk_hw_omap_ops clkhwops_omap4_dpllmx;