From patchwork Mon Feb 13 09:35:08 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 9569181 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A15596045D for ; Mon, 13 Feb 2017 09:37:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 90F972624A for ; Mon, 13 Feb 2017 09:37:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 84B9026212; Mon, 13 Feb 2017 09:37:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 24DA526212 for ; Mon, 13 Feb 2017 09:37:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752154AbdBMJht (ORCPT ); Mon, 13 Feb 2017 04:37:49 -0500 Received: from fllnx209.ext.ti.com ([198.47.19.16]:13035 "EHLO fllnx209.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751313AbdBMJht (ORCPT ); Mon, 13 Feb 2017 04:37:49 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by fllnx209.ext.ti.com (8.15.1/8.15.1) with ESMTP id v1D9a8Z9016218; Mon, 13 Feb 2017 03:36:08 -0600 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id v1D9a3e0004072; Mon, 13 Feb 2017 03:36:03 -0600 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.294.0; Mon, 13 Feb 2017 03:36:02 -0600 Received: from gomoku.home (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id v1D9ZOum021072; Mon, 13 Feb 2017 03:35:58 -0600 From: Tero Kristo To: , , , , CC: Subject: [PATCH 12/15] clk: ti: divider: add driver internal API for parsing divider data Date: Mon, 13 Feb 2017 11:35:08 +0200 Message-ID: <1486978511-29668-13-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1486978511-29668-1-git-send-email-t-kristo@ti.com> References: <1486978511-29668-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This can be used from the divider itself, and also from the clkctrl clocks once this is introduced. Signed-off-by: Tero Kristo --- drivers/clk/ti/clock.h | 4 +++ drivers/clk/ti/divider.c | 63 +++++++++++++++++++++++++++++++----------------- 2 files changed, 45 insertions(+), 22 deletions(-) diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h index 0f5f6d5..a85f5c0 100644 --- a/drivers/clk/ti/clock.h +++ b/drivers/clk/ti/clock.h @@ -222,6 +222,10 @@ struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw, struct clk_hw *ti_clk_build_component_gate(struct ti_clk_gate *setup); struct clk_hw *ti_clk_build_component_mux(struct ti_clk_mux *setup); +int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div, + u8 flags, u8 *width, + const struct clk_div_table **table); + void ti_clk_patch_legacy_clks(struct ti_clk **patch); struct clk *ti_clk_register_clk(struct ti_clk *setup); int ti_clk_register_legacy_clks(struct ti_clk_alias *clks); diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c index f33f139..219bd7c 100644 --- a/drivers/clk/ti/divider.c +++ b/drivers/clk/ti/divider.c @@ -290,20 +290,17 @@ static struct clk *_register_divider(struct device *dev, const char *name, return clk; } -static struct clk_div_table * -_get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width) +int ti_clk_parse_divider_data(int *div_table, int num_dividers, int max_div, + u8 flags, u8 *width, + const struct clk_div_table **table) { int valid_div = 0; - struct clk_div_table *table; - int i; - int div; u32 val; - u8 flags; - - if (!setup->num_dividers) { - /* Clk divider table not provided, determine min/max divs */ - flags = setup->flags; + int div; + int i; + struct clk_div_table *tmp; + if (!div_table) { if (flags & CLKF_INDEX_STARTS_AT_ONE) val = 1; else @@ -311,7 +308,7 @@ static struct clk *_register_divider(struct device *dev, const char *name, div = 1; - while (div < setup->max_div) { + while (div < max_div) { if (flags & CLKF_INDEX_POWER_OF_TWO) div <<= 1; else @@ -320,30 +317,52 @@ static struct clk *_register_divider(struct device *dev, const char *name, } *width = fls(val); + *table = NULL; - return NULL; + return 0; } - for (i = 0; i < setup->num_dividers; i++) - if (setup->dividers[i]) + i = 0; + + while (!num_dividers || i < num_dividers) { + if (div_table[i] == -1) + break; + if (div_table[i]) valid_div++; + i++; + } - table = kzalloc(sizeof(*table) * (valid_div + 1), GFP_KERNEL); - if (!table) - return ERR_PTR(-ENOMEM); + num_dividers = i; + + tmp = kzalloc(sizeof(*tmp) * (valid_div + 1), GFP_KERNEL); + if (!tmp) + return -ENOMEM; valid_div = 0; *width = 0; - for (i = 0; i < setup->num_dividers; i++) - if (setup->dividers[i]) { - table[valid_div].div = setup->dividers[i]; - table[valid_div].val = i; + for (i = 0; i < num_dividers; i++) + if (div_table[i] > 0) { + tmp[valid_div].div = div_table[i]; + tmp[valid_div].val = i; valid_div++; *width = i; } *width = fls(*width); + *table = tmp; + + return 0; +} + +static const struct clk_div_table * +_get_div_table_from_setup(struct ti_clk_divider *setup, u8 *width) +{ + const struct clk_div_table *table = NULL; + + ti_clk_parse_divider_data(setup->dividers, setup->num_dividers, + setup->max_div, setup->flags, width, + &table); return table; } @@ -385,7 +404,7 @@ struct clk *ti_clk_register_divider(struct ti_clk *setup) u8 width; u32 flags = 0; u8 div_flags = 0; - struct clk_div_table *table; + const struct clk_div_table *table; struct clk *clk; div = setup->data;