From patchwork Mon Dec 17 16:24:07 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianxin Pan X-Patchwork-Id: 10733787 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4B5811399 for ; Mon, 17 Dec 2018 16:25:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3AE4E2A1C0 for ; Mon, 17 Dec 2018 16:25:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2CFF82A1C7; Mon, 17 Dec 2018 16:25:02 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 886DF2A1C0 for ; Mon, 17 Dec 2018 16:25:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387953AbeLQQYi (ORCPT ); Mon, 17 Dec 2018 11:24:38 -0500 Received: from mail-sh2.amlogic.com ([58.32.228.45]:33928 "EHLO mail-sh2.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387823AbeLQQYh (ORCPT ); Mon, 17 Dec 2018 11:24:37 -0500 Received: from localhost.localdomain (10.18.11.217) by mail-sh2.amlogic.com (10.18.11.6) with Microsoft SMTP Server id 15.0.1320.4; Tue, 18 Dec 2018 00:24:49 +0800 From: Jianxin Pan To: Jerome Brunet , Neil Armstrong CC: Jianxin Pan , Kevin Hilman , Carlo Caione , Michael Turquette , Stephen Boyd , Rob Herring , Miquel Raynal , Boris Brezillon , Martin Blumenstingl , Yixun Lan , Liang Yang , Jian Hu , Qiufang Dai , Hanjie Lin , Victor Wan , , , , , Subject: [PATCH v8 1/4] clk: meson: add one based divider support for sclk divider Date: Tue, 18 Dec 2018 00:24:07 +0800 Message-ID: <1545063850-21504-2-git-send-email-jianxin.pan@amlogic.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> References: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.18.11.217] 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 When CLK_DIVIDER_ONE_BASED flag is set, the sclk divider will be: one based divider (div = val), and zero value gates the clock Signed-off-by: Jianxin Pan --- drivers/clk/meson/Makefile | 3 ++- drivers/clk/meson/clkc-audio.h | 8 ------ drivers/clk/meson/clkc.h | 10 ++++++- drivers/clk/meson/sclk-div.c | 59 ++++++++++++++++++++++++++++-------------- 4 files changed, 50 insertions(+), 30 deletions(-) diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile index a849aa8..acd8694 100644 --- a/drivers/clk/meson/Makefile +++ b/drivers/clk/meson/Makefile @@ -4,7 +4,8 @@ obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-pll.o clk-mpll.o clk-phase.o vid-pll-div.o obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-input.o -obj-$(CONFIG_COMMON_CLK_AMLOGIC_AUDIO) += clk-triphase.o sclk-div.o +obj-$(CONFIG_COMMON_CLK_AMLOGIC) += sclk-div.o +obj-$(CONFIG_COMMON_CLK_AMLOGIC_AUDIO) += clk-triphase.o obj-$(CONFIG_COMMON_CLK_MESON_AO) += meson-aoclk.o obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o gxbb-aoclk-32k.o diff --git a/drivers/clk/meson/clkc-audio.h b/drivers/clk/meson/clkc-audio.h index 0a7c157..286ff12 100644 --- a/drivers/clk/meson/clkc-audio.h +++ b/drivers/clk/meson/clkc-audio.h @@ -15,14 +15,6 @@ struct meson_clk_triphase_data { struct parm ph2; }; -struct meson_sclk_div_data { - struct parm div; - struct parm hi; - unsigned int cached_div; - struct clk_duty cached_duty; -}; - extern const struct clk_ops meson_clk_triphase_ops; -extern const struct clk_ops meson_sclk_div_ops; #endif /* __MESON_CLKC_AUDIO_H */ diff --git a/drivers/clk/meson/clkc.h b/drivers/clk/meson/clkc.h index 6183b22..00b3320 100644 --- a/drivers/clk/meson/clkc.h +++ b/drivers/clk/meson/clkc.h @@ -27,6 +27,14 @@ struct parm { u8 width; }; +struct meson_sclk_div_data { + struct parm div; + struct parm hi; + unsigned int cached_div; + struct clk_duty cached_duty; + u8 flags; +}; + static inline unsigned int meson_parm_read(struct regmap *map, struct parm *p) { unsigned int val; @@ -118,10 +126,10 @@ struct clk_regmap _name = { \ extern const struct clk_ops meson_clk_mpll_ops; extern const struct clk_ops meson_clk_phase_ops; extern const struct clk_ops meson_vid_pll_div_ro_ops; +extern const struct clk_ops meson_sclk_div_ops; struct clk_hw *meson_clk_hw_register_input(struct device *dev, const char *of_name, const char *clk_name, unsigned long flags); - #endif /* __CLKC_H */ diff --git a/drivers/clk/meson/sclk-div.c b/drivers/clk/meson/sclk-div.c index bc64019..a6c425b 100644 --- a/drivers/clk/meson/sclk-div.c +++ b/drivers/clk/meson/sclk-div.c @@ -4,42 +4,60 @@ * Author: Jerome Brunet * * Sample clock generator divider: - * This HW divider gates with value 0 but is otherwise a zero based divider: + * This HW divider gates with value 0 * * val >= 1 - * divider = val + 1 + * divider = val + 1 if ONE_BASED is not set, otherwise divider = val. * * The duty cycle may also be set for the LR clock variant. The duty cycle * ratio is: * * hi = [0 - val] - * duty_cycle = (1 + hi) / (1 + val) + * duty_cycle = (1 + hi) / (1 + val) if ONE_BASED is not set, otherwise: + * duty_cycle = hi / (1 + val) */ -#include "clkc-audio.h" +#include "clkc.h" -static inline struct meson_sclk_div_data * -meson_sclk_div_data(struct clk_regmap *clk) +static inline int get_reg(int val, unsigned char flag) { - return (struct meson_sclk_div_data *)clk->data; + WARN_ON(val < 1); + if ((flag & CLK_DIVIDER_ONE_BASED) || !val) + return val; + else + return val - 1; +} + +static inline int get_value(int reg, unsigned char flag) +{ + if (flag & CLK_DIVIDER_ONE_BASED) + return reg; + else + return reg + 1; } -static int sclk_div_maxval(struct meson_sclk_div_data *sclk) +static inline struct meson_sclk_div_data * +meson_sclk_div_data(struct clk_regmap *clk) { - return (1 << sclk->div.width) - 1; + return (struct meson_sclk_div_data *)clk->data; } static int sclk_div_maxdiv(struct meson_sclk_div_data *sclk) { - return sclk_div_maxval(sclk) + 1; + unsigned int reg = clk_div_mask(sclk->div.width); + + return get_value(reg, sclk->flags); } static int sclk_div_getdiv(struct clk_hw *hw, unsigned long rate, unsigned long prate, int maxdiv) { int div = DIV_ROUND_CLOSEST_ULL((u64)prate, rate); + struct clk_regmap *clk = to_clk_regmap(hw); + struct meson_sclk_div_data *sclk = meson_sclk_div_data(clk); + int mindiv = get_value(1, sclk->flags); - return clamp(div, 2, maxdiv); + return clamp(div, mindiv, maxdiv); } static int sclk_div_bestdiv(struct clk_hw *hw, unsigned long rate, @@ -47,7 +65,7 @@ static int sclk_div_bestdiv(struct clk_hw *hw, unsigned long rate, struct meson_sclk_div_data *sclk) { struct clk_hw *parent = clk_hw_get_parent(hw); - int bestdiv = 0, i; + int bestdiv = 0, i, mindiv; unsigned long maxdiv, now, parent_now; unsigned long best = 0, best_parent = 0; @@ -64,8 +82,9 @@ static int sclk_div_bestdiv(struct clk_hw *hw, unsigned long rate, * unsigned long in rate * i below */ maxdiv = min(ULONG_MAX / rate, maxdiv); + mindiv = get_value(1, sclk->flags); - for (i = 2; i <= maxdiv; i++) { + for (i = mindiv; i <= maxdiv; i++) { /* * It's the most ideal case if the requested rate can be * divided from parent clock without needing to change @@ -111,10 +130,7 @@ static void sclk_apply_ratio(struct clk_regmap *clk, sclk->cached_duty.num, sclk->cached_duty.den); - if (hi) - hi -= 1; - - meson_parm_write(clk->map, &sclk->hi, hi); + meson_parm_write(clk->map, &sclk->hi, get_reg(hi, sclk->flags)); } static int sclk_div_set_duty_cycle(struct clk_hw *hw, @@ -145,7 +161,7 @@ static int sclk_div_get_duty_cycle(struct clk_hw *hw, } hi = meson_parm_read(clk->map, &sclk->hi); - duty->num = hi + 1; + duty->num = get_value(hi, sclk->flags); duty->den = sclk->cached_div; return 0; } @@ -153,10 +169,13 @@ static int sclk_div_get_duty_cycle(struct clk_hw *hw, static void sclk_apply_divider(struct clk_regmap *clk, struct meson_sclk_div_data *sclk) { + unsigned int div; + if (MESON_PARM_APPLICABLE(&sclk->hi)) sclk_apply_ratio(clk, sclk); - meson_parm_write(clk->map, &sclk->div, sclk->cached_div - 1); + div = get_reg(sclk->cached_div, sclk->flags); + meson_parm_write(clk->map, &sclk->div, div); } static int sclk_div_set_rate(struct clk_hw *hw, unsigned long rate, @@ -224,7 +243,7 @@ static void sclk_div_init(struct clk_hw *hw) if (!val) sclk->cached_div = sclk_div_maxdiv(sclk); else - sclk->cached_div = val + 1; + sclk->cached_div = get_value(val, sclk->flags); sclk_div_get_duty_cycle(hw, &sclk->cached_duty); } From patchwork Mon Dec 17 16:24:08 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianxin Pan X-Patchwork-Id: 10733785 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F4091575 for ; Mon, 17 Dec 2018 16:25:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E7082A1C0 for ; Mon, 17 Dec 2018 16:25:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3293E2A1C7; Mon, 17 Dec 2018 16:25:00 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 B66C92A1C0 for ; Mon, 17 Dec 2018 16:24:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388052AbeLQQYl (ORCPT ); Mon, 17 Dec 2018 11:24:41 -0500 Received: from mail-sh2.amlogic.com ([58.32.228.45]:33928 "EHLO mail-sh2.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727771AbeLQQYl (ORCPT ); Mon, 17 Dec 2018 11:24:41 -0500 Received: from localhost.localdomain (10.18.11.217) by mail-sh2.amlogic.com (10.18.11.6) with Microsoft SMTP Server id 15.0.1320.4; Tue, 18 Dec 2018 00:24:49 +0800 From: Jianxin Pan To: Jerome Brunet , Neil Armstrong CC: Yixun Lan , Jianxin Pan , Kevin Hilman , Carlo Caione , Michael Turquette , Stephen Boyd , Rob Herring , Miquel Raynal , Boris Brezillon , Martin Blumenstingl , Liang Yang , Jian Hu , Qiufang Dai , Hanjie Lin , Victor Wan , , , , Subject: [PATCH v8 2/4] clk: meson: add emmc sub clock phase delay driver Date: Tue, 18 Dec 2018 00:24:08 +0800 Message-ID: <1545063850-21504-3-git-send-email-jianxin.pan@amlogic.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> References: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.18.11.217] 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 From: Yixun Lan Export the emmc sub clock phase delay ops which will be used by the emmc sub clock driver itself. Signed-off-by: Yixun Lan Signed-off-by: Jianxin Pan --- drivers/clk/meson/Makefile | 1 + drivers/clk/meson/clk-phase-delay.c | 70 +++++++++++++++++++++++++++++++++++++ drivers/clk/meson/clkc.h | 7 ++++ 3 files changed, 78 insertions(+) create mode 100644 drivers/clk/meson/clk-phase-delay.c diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile index acd8694..d59620d 100644 --- a/drivers/clk/meson/Makefile +++ b/drivers/clk/meson/Makefile @@ -3,6 +3,7 @@ # obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-pll.o clk-mpll.o clk-phase.o vid-pll-div.o +obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-phase-delay.o obj-$(CONFIG_COMMON_CLK_AMLOGIC) += clk-input.o obj-$(CONFIG_COMMON_CLK_AMLOGIC) += sclk-div.o obj-$(CONFIG_COMMON_CLK_AMLOGIC_AUDIO) += clk-triphase.o diff --git a/drivers/clk/meson/clk-phase-delay.c b/drivers/clk/meson/clk-phase-delay.c new file mode 100644 index 0000000..88004d2 --- /dev/null +++ b/drivers/clk/meson/clk-phase-delay.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Amlogic Meson MMC Sub Clock Controller Driver + * + * Copyright (c) 2017 Baylibre SAS. + * Author: Jerome Brunet + * + * Copyright (c) 2018 Amlogic, inc. + * Author: Yixun Lan + * Author: Jianxin Pan + */ + +#include +#include "clkc.h" + +static inline struct meson_clk_phase_delay_data * +meson_clk_get_phase_delay_data(struct clk_regmap *clk) +{ + return clk->data; +} + +static int meson_clk_phase_delay_get_phase(struct clk_hw *hw) +{ + struct clk_regmap *clk = to_clk_regmap(hw); + struct meson_clk_phase_delay_data *ph; + unsigned long period_ps, p, d; + int degrees; + + ph = meson_clk_get_phase_delay_data(clk); + p = meson_parm_read(clk->map, &ph->phase); + degrees = p * 360 / (1 << (ph->phase.width)); + + period_ps = DIV_ROUND_UP(NSEC_PER_SEC * 1000, + clk_hw_get_rate(hw)); + + d = meson_parm_read(clk->map, &ph->delay); + degrees += d * ph->delay_step_ps * 360 / period_ps; + degrees %= 360; + + return degrees; +} + +static int meson_clk_phase_delay_set_phase(struct clk_hw *hw, int degrees) +{ + struct clk_regmap *clk = to_clk_regmap(hw); + struct meson_clk_phase_delay_data *ph; + unsigned long period_ps, d = 0, r; + + ph = meson_clk_get_phase_delay_data(clk); + period_ps = DIV_ROUND_UP(NSEC_PER_SEC * 1000, clk_hw_get_rate(hw)); + + /* + * First compute the phase index (p), the remainder (r) is the + * part we'll try to acheive using the delays (d). + */ + r = do_div(degrees, 360 / 1 << (ph->phase.width)); + d = DIV_ROUND_CLOSEST(r * period_ps, + 360 * ph->delay_step_ps); + d = min(d, PMASK(ph->delay.width)); + + meson_parm_write(clk->map, &ph->phase, degrees); + meson_parm_write(clk->map, &ph->delay, d); + return 0; +} + +const struct clk_ops meson_clk_phase_delay_ops = { + .get_phase = meson_clk_phase_delay_get_phase, + .set_phase = meson_clk_phase_delay_set_phase, +}; +EXPORT_SYMBOL_GPL(meson_clk_phase_delay_ops); diff --git a/drivers/clk/meson/clkc.h b/drivers/clk/meson/clkc.h index 00b3320..e6f0905 100644 --- a/drivers/clk/meson/clkc.h +++ b/drivers/clk/meson/clkc.h @@ -118,6 +118,12 @@ struct clk_regmap _name = { \ }, \ }; +struct meson_clk_phase_delay_data { + struct parm phase; + struct parm delay; + unsigned int delay_step_ps; +}; + /* clk_ops */ extern const struct clk_ops meson_clk_pll_ro_ops; extern const struct clk_ops meson_clk_pll_ops; @@ -127,6 +133,7 @@ struct clk_regmap _name = { \ extern const struct clk_ops meson_clk_phase_ops; extern const struct clk_ops meson_vid_pll_div_ro_ops; extern const struct clk_ops meson_sclk_div_ops; +extern const struct clk_ops meson_clk_phase_delay_ops; struct clk_hw *meson_clk_hw_register_input(struct device *dev, const char *of_name, From patchwork Mon Dec 17 16:24:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianxin Pan X-Patchwork-Id: 10733783 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AA5D013BF for ; Mon, 17 Dec 2018 16:24:59 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9B3742A1C0 for ; Mon, 17 Dec 2018 16:24:59 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8F7402A1C7; Mon, 17 Dec 2018 16:24:59 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 31A6C2A1C0 for ; Mon, 17 Dec 2018 16:24:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388125AbeLQQYn (ORCPT ); Mon, 17 Dec 2018 11:24:43 -0500 Received: from mail-sh2.amlogic.com ([58.32.228.45]:33928 "EHLO mail-sh2.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387823AbeLQQYm (ORCPT ); Mon, 17 Dec 2018 11:24:42 -0500 Received: from localhost.localdomain (10.18.11.217) by mail-sh2.amlogic.com (10.18.11.6) with Microsoft SMTP Server id 15.0.1320.4; Tue, 18 Dec 2018 00:24:50 +0800 From: Jianxin Pan To: Jerome Brunet , Neil Armstrong CC: Yixun Lan , Jianxin Pan , Kevin Hilman , Carlo Caione , Michael Turquette , Stephen Boyd , Rob Herring , Miquel Raynal , Boris Brezillon , Martin Blumenstingl , Liang Yang , Jian Hu , Qiufang Dai , Hanjie Lin , Victor Wan , , , , Subject: [PATCH v8 3/4] clk: meson: add DT documentation for emmc clock controller Date: Tue, 18 Dec 2018 00:24:09 +0800 Message-ID: <1545063850-21504-4-git-send-email-jianxin.pan@amlogic.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> References: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.18.11.217] 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 From: Yixun Lan Document the MMC sub clock controller driver, the potential consumer of this driver is MMC or NAND. Also add four clock bindings IDs which provided by this driver. Reviewed-by: Rob Herring Signed-off-by: Yixun Lan Signed-off-by: Jianxin Pan --- .../devicetree/bindings/clock/amlogic,mmc-clkc.txt | 39 ++++++++++++++++++++++ include/dt-bindings/clock/amlogic,mmc-clkc.h | 17 ++++++++++ 2 files changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt create mode 100644 include/dt-bindings/clock/amlogic,mmc-clkc.h diff --git a/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt new file mode 100644 index 0000000..0f518e6 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/amlogic,mmc-clkc.txt @@ -0,0 +1,39 @@ +* Amlogic MMC Sub Clock Controller Driver + +The Amlogic MMC clock controller generates and supplies clock to support +MMC and NAND controller + +Required Properties: + +- compatible: should be: + "amlogic,gx-mmc-clkc" + "amlogic,axg-mmc-clkc" + +- #clock-cells: should be 1. +- clocks: phandles to clocks corresponding to the clock-names property +- clock-names: list of parent clock names + - "clkin0", "clkin1" + +- reg: address of emmc sub clock register + +Example: Clock controller node: + +sd_mmc_c_clkc: clock-controller@7000 { + compatible = "amlogic,axg-mmc-clkc", "syscon"; + reg = <0x0 0x7000 0x0 0x4>; + #clock-cells = <1>; + + clock-names = "clkin0", "clkin1"; + clocks = <&clkc CLKID_SD_MMC_C_CLK0>, + <&clkc CLKID_FCLK_DIV2>; +}; + +sd_emmc_b_clkc: clock-controller@5000 { + compatible = "amlogic,axg-mmc-clkc", "syscon"; + reg = <0x0 0x5000 0x0 0x4>; + + #clock-cells = <1>; + clock-names = "clkin0", "clkin1"; + clocks = <&clkc CLKID_SD_EMMC_B_CLK0>, + <&clkc CLKID_FCLK_DIV2>; +}; diff --git a/include/dt-bindings/clock/amlogic,mmc-clkc.h b/include/dt-bindings/clock/amlogic,mmc-clkc.h new file mode 100644 index 0000000..34a3c56 --- /dev/null +++ b/include/dt-bindings/clock/amlogic,mmc-clkc.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: (GPL-2.0+ OR MIT) */ +/* + * Meson MMC sub clock tree IDs + * + * Copyright (c) 2018 Amlogic, Inc. All rights reserved. + * Author: Yixun Lan + */ + +#ifndef __MMC_CLKC_H +#define __MMC_CLKC_H + +#define CLKID_MMC_DIV 0 +#define CLKID_MMC_PHASE_CORE 1 +#define CLKID_MMC_PHASE_TX 2 +#define CLKID_MMC_PHASE_RX 3 + +#endif From patchwork Mon Dec 17 16:24:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jianxin Pan X-Patchwork-Id: 10733777 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 459451399 for ; Mon, 17 Dec 2018 16:24:53 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 34F602A1C0 for ; Mon, 17 Dec 2018 16:24:53 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 288CB2A1C6; Mon, 17 Dec 2018 16:24:53 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 638682A1C0 for ; Mon, 17 Dec 2018 16:24:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387823AbeLQQYv (ORCPT ); Mon, 17 Dec 2018 11:24:51 -0500 Received: from mail-sh2.amlogic.com ([58.32.228.45]:33928 "EHLO mail-sh2.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388123AbeLQQYu (ORCPT ); Mon, 17 Dec 2018 11:24:50 -0500 Received: from localhost.localdomain (10.18.11.217) by mail-sh2.amlogic.com (10.18.11.6) with Microsoft SMTP Server id 15.0.1320.4; Tue, 18 Dec 2018 00:24:50 +0800 From: Jianxin Pan To: Jerome Brunet , Neil Armstrong CC: Yixun Lan , Jianxin Pan , Kevin Hilman , Carlo Caione , Michael Turquette , Stephen Boyd , Rob Herring , Miquel Raynal , Boris Brezillon , Martin Blumenstingl , Liang Yang , Jian Hu , Qiufang Dai , Hanjie Lin , Victor Wan , , , , Subject: [PATCH v8 4/4] clk: meson: add sub MMC clock controller driver Date: Tue, 18 Dec 2018 00:24:10 +0800 Message-ID: <1545063850-21504-5-git-send-email-jianxin.pan@amlogic.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> References: <1545063850-21504-1-git-send-email-jianxin.pan@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.18.11.217] 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 From: Yixun Lan The patch will add a MMC clock controller driver which used by MMC or NAND, It provide a mux and divider clock, and three phase clocks - core, tx, tx. Two clocks are provided as the parent of MMC clock controller from upper layer clock controller - eg "amlogic,axg-clkc" in AXG platform. To specify which clock the MMC or NAND driver may consume, the preprocessor macros in the dt-bindings/clock/amlogic,mmc-clkc.h header can be used in the device tree sources. Signed-off-by: Yixun Lan Signed-off-by: Jianxin Pan --- drivers/clk/meson/Kconfig | 9 ++ drivers/clk/meson/Makefile | 1 + drivers/clk/meson/mmc-clkc.c | 304 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 314 insertions(+) create mode 100644 drivers/clk/meson/mmc-clkc.c diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig index efaa70f..c84b0f7 100644 --- a/drivers/clk/meson/Kconfig +++ b/drivers/clk/meson/Kconfig @@ -15,6 +15,15 @@ config COMMON_CLK_MESON_AO select COMMON_CLK_REGMAP_MESON select RESET_CONTROLLER +config COMMON_CLK_MMC_MESON + tristate "Meson MMC Sub Clock Controller Driver" + select MFD_SYSCON + select COMMON_CLK_AMLOGIC + help + Support for the MMC sub clock controller on Amlogic Meson Platform, + which include S905 (GXBB, GXL), A113D/X (AXG) devices. + Say Y if you want this clock enabled. + config COMMON_CLK_REGMAP_MESON bool select REGMAP diff --git a/drivers/clk/meson/Makefile b/drivers/clk/meson/Makefile index d59620d..54416a2 100644 --- a/drivers/clk/meson/Makefile +++ b/drivers/clk/meson/Makefile @@ -12,4 +12,5 @@ obj-$(CONFIG_COMMON_CLK_MESON8B) += meson8b.o obj-$(CONFIG_COMMON_CLK_GXBB) += gxbb.o gxbb-aoclk.o gxbb-aoclk-32k.o obj-$(CONFIG_COMMON_CLK_AXG) += axg.o axg-aoclk.o obj-$(CONFIG_COMMON_CLK_AXG_AUDIO) += axg-audio.o +obj-$(CONFIG_COMMON_CLK_MMC_MESON) += mmc-clkc.o obj-$(CONFIG_COMMON_CLK_REGMAP_MESON) += clk-regmap.o diff --git a/drivers/clk/meson/mmc-clkc.c b/drivers/clk/meson/mmc-clkc.c new file mode 100644 index 0000000..2582a98 --- /dev/null +++ b/drivers/clk/meson/mmc-clkc.c @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: (GPL-2.0+ OR MIT) +/* + * Amlogic Meson MMC Sub Clock Controller Driver + * + * Copyright (c) 2017 Baylibre SAS. + * Author: Jerome Brunet + * + * Copyright (c) 2018 Amlogic, inc. + * Author: Yixun Lan + * Author: Jianxin Pan + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "clkc.h" + +/* clock ID used by internal driver */ + +#define SD_EMMC_CLOCK 0 +#define CLK_DELAY_STEP_PS 200 +#define MUX_CLK_NUM_PARENTS 2 +#define MMC_MAX_CLKS 4 + +struct mmc_clkc_data { + struct meson_clk_phase_delay_data tx; + struct meson_clk_phase_delay_data rx; +}; + +static struct clk_regmap_mux_data mmc_clkc_mux_data = { + .offset = SD_EMMC_CLOCK, + .mask = 0x3, + .shift = 6, +}; + +static const struct meson_sclk_div_data mmc_clkc_div_data = { + .div = { + .reg_off = SD_EMMC_CLOCK, + .width = 6, + }, + .flags = CLK_DIVIDER_ONE_BASED, +}; + +static struct meson_clk_phase_data mmc_clkc_core_phase = { + .ph = { + .reg_off = SD_EMMC_CLOCK, + .shift = 8, + .width = 2, + } +}; + +static const struct mmc_clkc_data mmc_clkc_gx_data = { + .tx = { + .phase = { + .reg_off = SD_EMMC_CLOCK, + .shift = 10, + .width = 2, + }, + .delay = { + .reg_off = SD_EMMC_CLOCK, + .shift = 16, + .width = 4, + }, + .delay_step_ps = CLK_DELAY_STEP_PS, + }, + .rx = { + .phase = { + .reg_off = SD_EMMC_CLOCK, + .shift = 12, + .width = 2, + }, + .delay = { + .reg_off = SD_EMMC_CLOCK, + .shift = 20, + .width = 4, + }, + .delay_step_ps = CLK_DELAY_STEP_PS, + }, +}; + +static const struct mmc_clkc_data mmc_clkc_axg_data = { + .tx = { + .phase = { + .reg_off = SD_EMMC_CLOCK, + .shift = 10, + .width = 2, + }, + .delay = { + .reg_off = SD_EMMC_CLOCK, + .shift = 16, + .width = 6, + }, + .delay_step_ps = CLK_DELAY_STEP_PS, + }, + .rx = { + .phase = { + .reg_off = SD_EMMC_CLOCK, + .shift = 12, + .width = 2, + }, + .delay = { + .reg_off = SD_EMMC_CLOCK, + .shift = 22, + .width = 6, + }, + .delay_step_ps = CLK_DELAY_STEP_PS, + }, +}; + +static const struct of_device_id mmc_clkc_match_table[] = { + { + .compatible = "amlogic,gx-mmc-clkc", + .data = &mmc_clkc_gx_data + }, + { + .compatible = "amlogic,axg-mmc-clkc", + .data = &mmc_clkc_axg_data + }, + {} +}; +MODULE_DEVICE_TABLE(of, mmc_clkc_match_table); + +static struct clk_regmap * +mmc_clkc_register_clk(struct device *dev, struct regmap *map, + struct clk_init_data *init, + const char *suffix, void *data) +{ + struct clk_regmap *clk; + char *name; + int ret; + + clk = devm_kzalloc(dev, sizeof(*clk), GFP_KERNEL); + if (!clk) + return ERR_PTR(-ENOMEM); + + name = kasprintf(GFP_KERNEL, "%s#%s", dev_name(dev), suffix); + if (!name) + return ERR_PTR(-ENOMEM); + + init->name = name; + clk->map = map; + clk->data = data; + clk->hw.init = init; + ret = devm_clk_hw_register(dev, &clk->hw); + if (ret) + clk = ERR_PTR(ret); + + kfree(name); + return clk; +} + +static struct clk_regmap *mmc_clkc_register_mux(struct device *dev, + struct regmap *map) +{ + const char *parent_names[MUX_CLK_NUM_PARENTS]; + struct clk_init_data init; + struct clk_regmap *mux; + struct clk *clk; + int i; + + for (i = 0; i < MUX_CLK_NUM_PARENTS; i++) { + char name[8]; + + snprintf(name, sizeof(name), "clkin%d", i); + clk = devm_clk_get(dev, name); + if (IS_ERR(clk)) { + if (clk != ERR_PTR(-EPROBE_DEFER)) + dev_err(dev, "Missing clock %s\n", name); + return ERR_CAST(clk); + } + + parent_names[i] = __clk_get_name(clk); + } + + init.ops = &clk_regmap_mux_ops; + init.flags = CLK_SET_RATE_PARENT; + init.parent_names = parent_names; + init.num_parents = MUX_CLK_NUM_PARENTS; + + mux = mmc_clkc_register_clk(dev, map, &init, "mux", &mmc_clkc_mux_data); + if (IS_ERR(mux)) + dev_err(dev, "Mux clock registration failed\n"); + + return mux; +} + +static struct clk_regmap * +mmc_clkc_register_clk_with_parent(struct device *dev, struct regmap *map, + char *suffix, const struct clk_hw *hw, + unsigned long flags, + const struct clk_ops *ops, void *data) +{ + struct clk_init_data init; + struct clk_regmap *clk; + const char *parent_name = clk_hw_get_name(hw); + + init.ops = ops; + init.flags = flags; + init.parent_names = &parent_name; + init.num_parents = 1; + + clk = mmc_clkc_register_clk(dev, map, &init, suffix, data); + if (IS_ERR(clk)) + dev_err(dev, "%s clock registration failed\n", suffix); + + return clk; +} + +static int mmc_clkc_probe(struct platform_device *pdev) +{ + struct clk_hw_onecell_data *onecell_data; + struct device *dev = &pdev->dev; + struct mmc_clkc_data *data; + struct regmap *map; + struct clk_regmap *clk, *core; + struct meson_sclk_div_data *div_data; + + /*cast to drop the const in match->data*/ + data = (struct mmc_clkc_data *)of_device_get_match_data(dev); + if (!data) + return -ENODEV; + + map = syscon_node_to_regmap(dev->of_node); + if (IS_ERR(map)) { + dev_err(dev, "could not find mmc clock controller\n"); + return PTR_ERR(map); + } + + onecell_data = devm_kzalloc(dev, sizeof(*onecell_data) + + sizeof(*onecell_data->hws) * MMC_MAX_CLKS, + GFP_KERNEL); + if (!onecell_data) + return -ENOMEM; + + clk = mmc_clkc_register_mux(dev, map); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + div_data = devm_kzalloc(dev, sizeof(*div_data), GFP_KERNEL); + if (!div_data) + return -ENOMEM; + + memcpy(div_data, &mmc_clkc_div_data, sizeof(*div_data)); + clk = mmc_clkc_register_clk_with_parent(dev, map, "div", + &clk->hw, + CLK_SET_RATE_PARENT, + &meson_sclk_div_ops, + div_data); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + onecell_data->hws[CLKID_MMC_DIV] = &clk->hw, + + core = mmc_clkc_register_clk_with_parent(dev, map, "core", + &clk->hw, + CLK_SET_RATE_PARENT, + &meson_clk_phase_ops, + &mmc_clkc_core_phase); + if (IS_ERR(core)) + return PTR_ERR(core); + + onecell_data->hws[CLKID_MMC_PHASE_CORE] = &core->hw, + + clk = mmc_clkc_register_clk_with_parent(dev, map, "rx", + &core->hw, 0, + &meson_clk_phase_delay_ops, + &data->rx); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + onecell_data->hws[CLKID_MMC_PHASE_RX] = &clk->hw, + clk = mmc_clkc_register_clk_with_parent(dev, map, "tx", + &core->hw, 0, + &meson_clk_phase_delay_ops, + &data->tx); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + onecell_data->hws[CLKID_MMC_PHASE_TX] = &clk->hw, + onecell_data->num = MMC_MAX_CLKS; + return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, + onecell_data); +} + +static struct platform_driver mmc_clkc_driver = { + .probe = mmc_clkc_probe, + .driver = { + .name = "meson-mmc-clkc", + .of_match_table = of_match_ptr(mmc_clkc_match_table), + }, +}; + +module_platform_driver(mmc_clkc_driver); + +MODULE_DESCRIPTION("Amlogic AXG MMC clock driver"); +MODULE_AUTHOR("Jianxin Pan "); +MODULE_LICENSE("GPL v2");