From patchwork Fri Mar 24 08:24:39 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 9642365 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 A274E6020B for ; Fri, 24 Mar 2017 08:26:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 910EC2841C for ; Fri, 24 Mar 2017 08:26:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 844462846D; Fri, 24 Mar 2017 08:26:27 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID 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 833EF2841C for ; Fri, 24 Mar 2017 08:26:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752947AbdCXI0Q (ORCPT ); Fri, 24 Mar 2017 04:26:16 -0400 Received: from mail-lf0-f41.google.com ([209.85.215.41]:35469 "EHLO mail-lf0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751115AbdCXIZd (ORCPT ); Fri, 24 Mar 2017 04:25:33 -0400 Received: by mail-lf0-f41.google.com with SMTP id j90so2784481lfk.2 for ; Fri, 24 Mar 2017 01:24:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id; bh=R8VhrrnlzdBnQzQgCWC/Ci4rmJEYitZkKk8EMYZsV+8=; b=X++uCLTHKBgIESVEqSW8TCcHC+FCwbJpvUuFwSVbQ6TD0cuwW8RPcO1yjQssj37oZn xDPVH+xnw+8M9YyncZLR5GpXLwId3CcMbEsUkxeXKOj4WqURCvw0HnqD02wEXBBxpYvu CCT+cMdwnJ+QOr650uTmp0irM4kWFO7eLZOcg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=R8VhrrnlzdBnQzQgCWC/Ci4rmJEYitZkKk8EMYZsV+8=; b=YaigKaZMi4b1jBKKNgL4cDDJdneNJM0fxmkg7Z/ilsvb5Mfrium2/2MqvQVxjmN1WT wAheVYSUaDGq8qRjmI9javKYihn453hx7BuT/0vvpvRYSnv/em4Ht5PHvw8TwYiTR5JW dnz/8aWYZWydgbDn6sDPfsRd5dswH+s6WJAbhOAZPMogY0hV1RmfA0pib+yEG3ggGOxG l3MBH3xb2frdcuSf+M7IfrFvfTT+PJk78BSzT8I2KGPNP8iKNP0KcPIR7isL5P8Nz54k syyGg5tDVMIFghz5d+Nhzo5Pwz1WxJxdteTZt7t8DgdTWoFvPLhtZWtd3o5TQaX1AIgK bQ6g== X-Gm-Message-State: AFeK/H2h6pwUudUGNnPPNKEEGSuta20yOypTGPsa6E40KJKpWABDCNZx9n2nZGmZ6b5wI99s X-Received: by 10.25.25.207 with SMTP id 198mr3595184lfz.1.1490343884535; Fri, 24 Mar 2017 01:24:44 -0700 (PDT) Received: from genomnajs.ideon.se ([85.235.10.227]) by smtp.gmail.com with ESMTPSA id c66sm239476lfg.9.2017.03.24.01.24.42 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 24 Mar 2017 01:24:43 -0700 (PDT) From: Linus Walleij To: Michael Turquette , Stephen Boyd Cc: linux-clk@vger.kernel.org, linux-arm-msm@vger.kernel.org, Linus Walleij Subject: [PATCH 2/2] clk: qcom: Add support for MSM8660 LCC Date: Fri, 24 Mar 2017 09:24:39 +0100 Message-Id: <20170324082439.6196-1-linus.walleij@linaro.org> X-Mailer: git-send-email 2.9.3 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 adds support for the MSM8660 Low-power audio subsystem (LPASS) clock controller (LCC). This is nice when you want to have audio from the system. We currently only support using the PLL4 (which is an RPM clock) as the parent, however the LPASS has its own PLL named LPA_PLL0 that we can experiment with enabling later on, so for this reason the code contains a few hints on how to enable the LPA_PLL0. Signed-off-by: Linus Walleij --- drivers/clk/qcom/Kconfig | 9 + drivers/clk/qcom/Makefile | 1 + drivers/clk/qcom/lcc-msm8660.c | 418 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 428 insertions(+) create mode 100644 drivers/clk/qcom/lcc-msm8660.c diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig index 5fb8d7430908..d657d94d372f 100644 --- a/drivers/clk/qcom/Kconfig +++ b/drivers/clk/qcom/Kconfig @@ -90,6 +90,15 @@ config MSM_GCC_8660 Say Y if you want to use peripheral devices such as UART, SPI, i2c, USB, SD/eMMC, etc. +config MSM_LCC_8660 + tristate "MSM8660 LPASS Clock Controller" + select MSM_GCC_8660 + depends on COMMON_CLK_QCOM + help + Support for the Low-power Audio Subsystem (LPASS) clock controller + on MSM8660 devices. + Say Y if you want to use audio devices such as I2S and PCM. + config MSM_GCC_8916 tristate "MSM8916 Global Clock Controller" select QCOM_GDSC diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile index 1c3e222b917b..d6d5ab178522 100644 --- a/drivers/clk/qcom/Makefile +++ b/drivers/clk/qcom/Makefile @@ -21,6 +21,7 @@ obj-$(CONFIG_IPQ_LCC_806X) += lcc-ipq806x.o obj-$(CONFIG_MDM_GCC_9615) += gcc-mdm9615.o obj-$(CONFIG_MDM_LCC_9615) += lcc-mdm9615.o obj-$(CONFIG_MSM_GCC_8660) += gcc-msm8660.o +obj-$(CONFIG_MSM_LCC_8660) += lcc-msm8660.o obj-$(CONFIG_MSM_GCC_8916) += gcc-msm8916.o obj-$(CONFIG_MSM_GCC_8960) += gcc-msm8960.o obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o diff --git a/drivers/clk/qcom/lcc-msm8660.c b/drivers/clk/qcom/lcc-msm8660.c new file mode 100644 index 000000000000..73dc8ede6a2a --- /dev/null +++ b/drivers/clk/qcom/lcc-msm8660.c @@ -0,0 +1,418 @@ +/* + * Qualcomm MSM8660/APQ8060 Low-power Audio Subsystem (LPASS) Clock Controller + * Copyright (c) 2017 Linus Walleij + * + * Based on a copy of the IPQ806x driver + * (C) 2014 Rajendra Nayak + * and portions of the MDM9615 driver + * (C) 2014 Neil Armstrong. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "common.h" +#include "clk-regmap.h" +#include "clk-pll.h" +#include "clk-rcg.h" +#include "clk-branch.h" +#include "clk-regmap-divider.h" +#include "clk-regmap-mux.h" + +/* + * The vendor tree calls this "PLL0" but we are going to refer to it as + * LPA_PLL0 so as not to confuse it with the PLL0 on the GCC. + */ +static struct clk_pll lpa_pll0 = { + .l_reg = 0x4, + .m_reg = 0x8, + .n_reg = 0xc, + .config_reg = 0x14, + .mode_reg = 0x0, + .status_reg = 0x18, + .status_bit = 16, + .clkr.hw.init = &(struct clk_init_data){ + .name = "lpa_pll0", + .parent_names = (const char *[]){ "pxo" }, + .num_parents = 1, + .ops = &clk_pll_ops, + }, +}; + +/* + * The l/m/n values were read out of the registers after a cold boot. + * The config register read 00c22080 and the mode register 0x00000007. + */ +static const struct pll_config lpa_pll0_config = { + .l = 0xf, + .m = 0x1c, + .n = 0x465, + .vco_val = BIT(17), + .vco_mask = BIT(17) | BIT(16), + .pre_div_val = 0x0, + .pre_div_mask = BIT(19), + .post_div_val = 0x0, + .post_div_mask = BIT(21) | BIT(20), + .mn_ena_mask = BIT(22), + .main_output_mask = BIT(23), +}; + +enum { + P_PXO, + P_CXO, + P_PLL4_LPA_PLL0, + P_GND, +}; + +/* The vendor code uses PLL4 as parent everywhere */ +static const struct parent_map lcc_parent_map[] = { + { P_PXO, 0 }, + { P_CXO, 1 }, + /* Select RPM PLL4, but also used for selecting LPA PLL0 */ + { P_PLL4_LPA_PLL0, 2 }, + /* Will just ground the line */ + { P_GND, 6 }, +}; + +static const char * const lcc_parent_tbl[] = { + "pxo", + "cxo", + /* + * PLL4 is an RPM clock on MSM8660/APQ8060, set to "pll4" for this + * If we enable and mux in the LPA_PLL0 on this platform, we can + * set this to "lpa_pll0" instead + */ + "pll4_clk", + "gnd", /* This is a very inactive parent */ +}; + +/* + * This table is evidently for using PLL4 as parent, if we start using + * LPA_PLL0 we need to provide a second table. + */ +static struct freq_tbl clk_tbl_aif_osr_pll4[] = { + { 768000, P_PLL4_LPA_PLL0, 4, 1, 176 }, + { 1024000, P_PLL4_LPA_PLL0, 4, 1, 132 }, + { 1536000, P_PLL4_LPA_PLL0, 4, 1, 88 }, + { 2048000, P_PLL4_LPA_PLL0, 4, 1, 66 }, + { 3072000, P_PLL4_LPA_PLL0, 4, 1, 44 }, + { 4096000, P_PLL4_LPA_PLL0, 4, 1, 33 }, + { 6144000, P_PLL4_LPA_PLL0, 4, 1, 22 }, + { 8192000, P_PLL4_LPA_PLL0, 2, 1, 33 }, + { 12288000, P_PLL4_LPA_PLL0, 4, 1, 11 }, + { 24576000, P_PLL4_LPA_PLL0, 2, 1, 11 }, + { 27000000, P_PXO, 1, 0, 0 }, + { } +}; + +/* + * This macro is modified from lcc-mdm9516.c, it's used for all the + * AIF clocks, all of them have an OSR clock and a bit clock derived + * from the OSR clock. + * + * These clocks differ from many other platforms by using + * BRANCH_HALT_DELAY for the *_bit_div_clk + */ +#define CLK_AIF_OSR_DIV(prefix, _ns, _md, _hr) \ +static struct clk_rcg prefix##_osr_src = { \ + .ns_reg = _ns, \ + .md_reg = _md, \ + .mn = { \ + .mnctr_en_bit = 8, \ + .mnctr_reset_bit = 7, \ + .mnctr_mode_shift = 5, \ + .n_val_shift = 24, \ + .m_val_shift = 8, \ + .width = 8, \ + }, \ + .p = { \ + .pre_div_shift = 3, \ + .pre_div_width = 2, \ + }, \ + .s = { \ + .src_sel_shift = 0, \ + .parent_map = lcc_parent_map, \ + }, \ + .freq_tbl = clk_tbl_aif_osr_pll4, \ + .clkr = { \ + .enable_reg = _ns, \ + .enable_mask = BIT(9), \ + .hw.init = &(struct clk_init_data){ \ + .name = #prefix "_osr_src", \ + .parent_names = lcc_parent_tbl, \ + .num_parents = 4, \ + .ops = &clk_rcg_ops, \ + .flags = CLK_SET_RATE_GATE, \ + }, \ + }, \ +}; \ + \ +static const char * const lcc_##prefix##_parents[] = { \ + #prefix "_osr_src", \ +}; \ + \ +static struct clk_branch prefix##_osr_clk = { \ + .halt_reg = _hr, \ + .halt_bit = 1, \ + .halt_check = BRANCH_HALT_ENABLE, \ + .clkr = { \ + .enable_reg = _ns, \ + .enable_mask = BIT(17), \ + .hw.init = &(struct clk_init_data){ \ + .name = #prefix "_osr_clk", \ + .parent_names = lcc_##prefix##_parents, \ + .num_parents = 1, \ + .ops = &clk_branch_ops, \ + .flags = CLK_SET_RATE_PARENT, \ + }, \ + }, \ +}; \ + \ +static struct clk_regmap_div prefix##_div_clk = { \ + .reg = _ns, \ + .shift = 10, \ + .width = 4, \ + .clkr = { \ + .hw.init = &(struct clk_init_data){ \ + .name = #prefix "_div_clk", \ + .parent_names = lcc_##prefix##_parents, \ + .num_parents = 1, \ + .ops = &clk_regmap_div_ops, \ + }, \ + }, \ +}; \ + \ +static struct clk_branch prefix##_bit_div_clk = { \ + .halt_reg = _hr, \ + .halt_bit = 0, \ + .halt_check = BRANCH_HALT_DELAY, \ + .clkr = { \ + .enable_reg = _ns, \ + .enable_mask = BIT(15), \ + .hw.init = &(struct clk_init_data){ \ + .name = #prefix "_bit_div_clk", \ + .parent_names = (const char *[]){ \ + #prefix "_div_clk" \ + }, \ + .num_parents = 1, \ + .ops = &clk_branch_ops, \ + .flags = CLK_SET_RATE_PARENT, \ + }, \ + }, \ +}; \ + \ +static struct clk_regmap_mux prefix##_bit_clk = { \ + .reg = _ns, \ + .shift = 14, \ + .width = 1, \ + .clkr = { \ + .hw.init = &(struct clk_init_data){ \ + .name = #prefix "_bit_clk", \ + .parent_names = (const char *[]){ \ + #prefix "_bit_div_clk", \ + #prefix "_codec_clk", \ + }, \ + .num_parents = 2, \ + .ops = &clk_regmap_mux_closest_ops, \ + .flags = CLK_SET_RATE_PARENT, \ + }, \ + }, \ +} + +CLK_AIF_OSR_DIV(mi2s, 0x48, 0x4c, 0x50); +CLK_AIF_OSR_DIV(codec_i2s_mic, 0x60, 0x64, 0x68); +CLK_AIF_OSR_DIV(spare_i2s_mic, 0x78, 0x7c, 0x80); +CLK_AIF_OSR_DIV(codec_i2s_spkr, 0x6c, 0x70, 0x74); +CLK_AIF_OSR_DIV(spare_i2s_spkr, 0x84, 0x88, 0x8c); + +/* + * PCM clock + * This table is evidently for using PLL4 as parent, if we start using + * LPA_PLL0 we need to provide a second table. + */ +static struct freq_tbl clk_tbl_pcm_pll4[] = { + { 512000, P_PLL4_LPA_PLL0, 4, 1, 264 }, + { 768000, P_PLL4_LPA_PLL0, 4, 1, 176 }, + { 1024000, P_PLL4_LPA_PLL0, 4, 1, 132 }, + { 1536000, P_PLL4_LPA_PLL0, 4, 1, 88 }, + { 2048000, P_PLL4_LPA_PLL0, 4, 1, 66 }, + { 3072000, P_PLL4_LPA_PLL0, 4, 1, 44 }, + { 4096000, P_PLL4_LPA_PLL0, 4, 1, 33 }, + { 6144000, P_PLL4_LPA_PLL0, 4, 1, 22 }, + { 8192000, P_PLL4_LPA_PLL0, 2, 1, 33 }, + { 12288000, P_PLL4_LPA_PLL0, 4, 1, 11 }, + { 24580000, P_PLL4_LPA_PLL0, 2, 1, 11 }, + { 27000000, P_PXO, 1, 0, 0 }, + { }, +}; + +static struct clk_rcg pcm_src = { + .ns_reg = 0x54, + .md_reg = 0x58, + .mn = { + .mnctr_en_bit = 8, + .mnctr_reset_bit = 7, + .mnctr_mode_shift = 5, + .n_val_shift = 16, + .m_val_shift = 16, + .width = 16, + }, + .p = { + .pre_div_shift = 3, + .pre_div_width = 2, + }, + .s = { + .src_sel_shift = 0, + .parent_map = lcc_parent_map, + }, + .freq_tbl = clk_tbl_pcm_pll4, + .clkr = { + .enable_reg = 0x54, + .enable_mask = BIT(9), + .hw.init = &(struct clk_init_data){ + .name = "pcm_src", + .parent_names = lcc_parent_tbl, + .num_parents = 4, + .ops = &clk_rcg_ops, + .flags = CLK_SET_RATE_GATE, + }, + }, +}; + +static struct clk_branch pcm_clk_out = { + .halt_reg = 0x5c, + .halt_bit = 0, + .halt_check = BRANCH_HALT_ENABLE, + .clkr = { + .enable_reg = 0x54, + .enable_mask = BIT(11), + .hw.init = &(struct clk_init_data){ + .name = "pcm_clk_out", + .parent_names = (const char *[]){ "pcm_src" }, + .num_parents = 1, + .ops = &clk_branch_ops, + .flags = CLK_SET_RATE_PARENT, + }, + }, +}; + +static struct clk_regmap_mux pcm_clk = { + .reg = 0x54, + .shift = 10, + .width = 1, + .clkr = { + .hw.init = &(struct clk_init_data){ + .name = "pcm_clk", + .parent_names = (const char *[]){ + "pcm_clk_out", + "pcm_codec_clk", + }, + .num_parents = 2, + .ops = &clk_regmap_mux_closest_ops, + .flags = CLK_SET_RATE_PARENT, + }, + }, +}; + +static struct clk_regmap *lcc_msm8660_clks[] = { + [LPA_PLL0] = &lpa_pll0.clkr, + [MI2S_OSR_SRC] = &mi2s_osr_src.clkr, + [MI2S_OSR_CLK] = &mi2s_osr_clk.clkr, + [MI2S_DIV_CLK] = &mi2s_div_clk.clkr, + [MI2S_BIT_DIV_CLK] = &mi2s_bit_div_clk.clkr, + [MI2S_BIT_CLK] = &mi2s_bit_clk.clkr, + [CODEC_I2S_MIC_OSR_SRC] = &codec_i2s_mic_osr_src.clkr, + [CODEC_I2S_MIC_OSR_CLK] = &codec_i2s_mic_osr_clk.clkr, + [CODEC_I2S_MIC_DIV_CLK] = &codec_i2s_mic_div_clk.clkr, + [CODEC_I2S_MIC_BIT_DIV_CLK] = &codec_i2s_mic_bit_div_clk.clkr, + [CODEC_I2S_MIC_BIT_CLK] = &codec_i2s_mic_bit_clk.clkr, + [SPARE_I2S_MIC_OSR_SRC] = &spare_i2s_mic_osr_src.clkr, + [SPARE_I2S_MIC_OSR_CLK] = &spare_i2s_mic_osr_clk.clkr, + [SPARE_I2S_MIC_DIV_CLK] = &spare_i2s_mic_div_clk.clkr, + [SPARE_I2S_MIC_BIT_DIV_CLK] = &spare_i2s_mic_bit_div_clk.clkr, + [SPARE_I2S_MIC_BIT_CLK] = &spare_i2s_mic_bit_clk.clkr, + [CODEC_I2S_SPKR_OSR_SRC] = &codec_i2s_spkr_osr_src.clkr, + [CODEC_I2S_SPKR_OSR_CLK] = &codec_i2s_spkr_osr_clk.clkr, + [CODEC_I2S_SPKR_DIV_CLK] = &codec_i2s_spkr_div_clk.clkr, + [CODEC_I2S_SPKR_BIT_DIV_CLK] = &codec_i2s_spkr_bit_div_clk.clkr, + [CODEC_I2S_SPKR_BIT_CLK] = &codec_i2s_spkr_bit_clk.clkr, + [SPARE_I2S_SPKR_OSR_SRC] = &spare_i2s_spkr_osr_src.clkr, + [SPARE_I2S_SPKR_OSR_CLK] = &spare_i2s_spkr_osr_clk.clkr, + [SPARE_I2S_SPKR_DIV_CLK] = &spare_i2s_spkr_div_clk.clkr, + [SPARE_I2S_SPKR_BIT_DIV_CLK] = &spare_i2s_spkr_bit_div_clk.clkr, + [SPARE_I2S_SPKR_BIT_CLK] = &spare_i2s_spkr_bit_clk.clkr, + [PCM_SRC] = &pcm_src.clkr, + [PCM_CLK_OUT] = &pcm_clk_out.clkr, + [PCM_CLK] = &pcm_clk.clkr, +}; + +static const struct regmap_config lcc_msm8660_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = 0xfc, + .fast_io = true, +}; + +static const struct qcom_cc_desc lcc_msm8660_desc = { + .config = &lcc_msm8660_regmap_config, + .clks = lcc_msm8660_clks, + .num_clks = ARRAY_SIZE(lcc_msm8660_clks), +}; + +static const struct of_device_id lcc_msm8660_match_table[] = { + { .compatible = "qcom,lcc-msm8660" }, + { } +}; +MODULE_DEVICE_TABLE(of, lcc_msm8660_match_table); + +static int lcc_msm8660_probe(struct platform_device *pdev) +{ + u32 val; + struct regmap *regmap; + + regmap = qcom_cc_map(pdev, &lcc_msm8660_desc); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + /* Configure the rate of LPA_PLL0 if the bootloader hasn't already */ + regmap_read(regmap, 0x0, &val); + if (!val) { + dev_info(&pdev->dev, "configuring LPA_PLL0\n"); + clk_pll_configure_sr(&lpa_pll0, regmap, &lpa_pll0_config, true); + } else { + dev_info(&pdev->dev, + "LPA_PLL0 already configured\n"); + } + + /* + * Enable LPA_PLL0 source on the LPASS Primary PLL Mux. Incidentally + * this is set to 0x00000001 at boot. + * 0x01 = LPA_PLL0 + */ + regmap_write(regmap, 0xc4, 0x1); + + return qcom_cc_really_probe(pdev, &lcc_msm8660_desc, regmap); +} + +static struct platform_driver lcc_msm8660_driver = { + .probe = lcc_msm8660_probe, + .driver = { + .name = "lcc-msm8660", + .of_match_table = lcc_msm8660_match_table, + }, +}; +module_platform_driver(lcc_msm8660_driver); + +MODULE_DESCRIPTION("QCOM LCC MSM8660 Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:lcc-msm8660");