Re: [PATCH v3 6/8] clk: qcom: Add IPQ806X LPASS clock controller (LCC) driver
From: Mike Turquette
Date: Tue Jan 27 2015 - 14:51:35 EST
Quoting Stephen Boyd (2015-01-19 18:05:33)
> From: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
>
> Add an LCC driver for IPQ806x that supports the i2s, S/PDIF, and
> pcm clocks.
>
> Signed-off-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
> Signed-off-by: Kumar Gala <galak@xxxxxxxxxxxxxx>
> Signed-off-by: Josh Cartwright <joshc@xxxxxxxxxxxxxx>
> [sboyd@xxxxxxxxxxxxxx: Reworded commit text, added Kconfig
> select, fleshed out Kconfig description a bit more, added pll4
> configuration and reworked probe for it, added muxes, split out
> dt-binding file]
> Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
>
> Change-Id: Idf4d008306a98d75d914c5625b46d15c6f7921b4
I stripped out Change-Id while applying.
Regards,
Mike
> ---
> drivers/clk/qcom/Kconfig | 9 +
> drivers/clk/qcom/Makefile | 1 +
> drivers/clk/qcom/gcc-ipq806x.c | 12 ++
> drivers/clk/qcom/lcc-ipq806x.c | 473 +++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 495 insertions(+)
> create mode 100644 drivers/clk/qcom/lcc-ipq806x.c
>
> diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
> index 1107351ed346..07bce5f35eee 100644
> --- a/drivers/clk/qcom/Kconfig
> +++ b/drivers/clk/qcom/Kconfig
> @@ -29,6 +29,15 @@ config IPQ_GCC_806X
> Say Y if you want to use peripheral devices such as UART, SPI,
> i2c, USB, SD/eMMC, etc.
>
> +config IPQ_LCC_806X
> + tristate "IPQ806x LPASS Clock Controller"
> + select IPQ_GCC_806X
> + depends on COMMON_CLK_QCOM
> + help
> + Support for the LPASS clock controller on ipq806x devices.
> + Say Y if you want to use audio devices such as i2s, pcm,
> + S/PDIF, etc.
> +
> config MSM_GCC_8660
> tristate "MSM8660 Global Clock Controller"
> depends on COMMON_CLK_QCOM
> diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
> index f5e5607f3965..13c03a8808ec 100644
> --- a/drivers/clk/qcom/Makefile
> +++ b/drivers/clk/qcom/Makefile
> @@ -13,6 +13,7 @@ clk-qcom-y += reset.o
> obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o
> obj-$(CONFIG_APQ_MMCC_8084) += mmcc-apq8084.o
> obj-$(CONFIG_IPQ_GCC_806X) += gcc-ipq806x.o
> +obj-$(CONFIG_IPQ_LCC_806X) += lcc-ipq806x.o
> obj-$(CONFIG_MSM_GCC_8660) += gcc-msm8660.o
> obj-$(CONFIG_MSM_GCC_8960) += gcc-msm8960.o
> obj-$(CONFIG_MSM_GCC_8974) += gcc-msm8974.o
> diff --git a/drivers/clk/qcom/gcc-ipq806x.c b/drivers/clk/qcom/gcc-ipq806x.c
> index afed5eb0691e..cbdc31dea7f4 100644
> --- a/drivers/clk/qcom/gcc-ipq806x.c
> +++ b/drivers/clk/qcom/gcc-ipq806x.c
> @@ -75,6 +75,17 @@ static struct clk_pll pll3 = {
> },
> };
>
> +static struct clk_regmap pll4_vote = {
> + .enable_reg = 0x34c0,
> + .enable_mask = BIT(4),
> + .hw.init = &(struct clk_init_data){
> + .name = "pll4_vote",
> + .parent_names = (const char *[]){ "pll4" },
> + .num_parents = 1,
> + .ops = &clk_pll_vote_ops,
> + },
> +};
> +
> static struct clk_pll pll8 = {
> .l_reg = 0x3144,
> .m_reg = 0x3148,
> @@ -2163,6 +2174,7 @@ static struct clk_regmap *gcc_ipq806x_clks[] = {
> [PLL0] = &pll0.clkr,
> [PLL0_VOTE] = &pll0_vote,
> [PLL3] = &pll3.clkr,
> + [PLL4_VOTE] = &pll4_vote,
> [PLL8] = &pll8.clkr,
> [PLL8_VOTE] = &pll8_vote,
> [PLL14] = &pll14.clkr,
> diff --git a/drivers/clk/qcom/lcc-ipq806x.c b/drivers/clk/qcom/lcc-ipq806x.c
> new file mode 100644
> index 000000000000..121ffde25dc3
> --- /dev/null
> +++ b/drivers/clk/qcom/lcc-ipq806x.c
> @@ -0,0 +1,473 @@
> +/*
> + * Copyright (c) 2014, The Linux Foundation. All rights reserved.
> + *
> + * This software is licensed under the terms of the GNU General Public
> + * License version 2, as published by the Free Software Foundation, and
> + * may be copied, distributed, and modified under those terms.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/bitops.h>
> +#include <linux/err.h>
> +#include <linux/platform_device.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/clk-provider.h>
> +#include <linux/regmap.h>
> +
> +#include <dt-bindings/clock/qcom,lcc-ipq806x.h>
> +
> +#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"
> +
> +static struct clk_pll pll4 = {
> + .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 = "pll4",
> + .parent_names = (const char *[]){ "pxo" },
> + .num_parents = 1,
> + .ops = &clk_pll_ops,
> + },
> +};
> +
> +static const struct pll_config pll4_config = {
> + .l = 0xf,
> + .m = 0x91,
> + .n = 0xc7,
> + .vco_val = 0x0,
> + .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),
> +};
> +
> +#define P_PXO 0
> +#define P_PLL4 1
> +
> +static const u8 lcc_pxo_pll4_map[] = {
> + [P_PXO] = 0,
> + [P_PLL4] = 2,
> +};
> +
> +static const char *lcc_pxo_pll4[] = {
> + "pxo",
> + "pll4_vote",
> +};
> +
> +static struct freq_tbl clk_tbl_aif_mi2s[] = {
> + { 1024000, P_PLL4, 4, 1, 96 },
> + { 1411200, P_PLL4, 4, 2, 139 },
> + { 1536000, P_PLL4, 4, 1, 64 },
> + { 2048000, P_PLL4, 4, 1, 48 },
> + { 2116800, P_PLL4, 4, 2, 93 },
> + { 2304000, P_PLL4, 4, 2, 85 },
> + { 2822400, P_PLL4, 4, 6, 209 },
> + { 3072000, P_PLL4, 4, 1, 32 },
> + { 3175200, P_PLL4, 4, 1, 31 },
> + { 4096000, P_PLL4, 4, 1, 24 },
> + { 4233600, P_PLL4, 4, 9, 209 },
> + { 4608000, P_PLL4, 4, 3, 64 },
> + { 5644800, P_PLL4, 4, 12, 209 },
> + { 6144000, P_PLL4, 4, 1, 16 },
> + { 6350400, P_PLL4, 4, 2, 31 },
> + { 8192000, P_PLL4, 4, 1, 12 },
> + { 8467200, P_PLL4, 4, 18, 209 },
> + { 9216000, P_PLL4, 4, 3, 32 },
> + { 11289600, P_PLL4, 4, 24, 209 },
> + { 12288000, P_PLL4, 4, 1, 8 },
> + { 12700800, P_PLL4, 4, 27, 209 },
> + { 13824000, P_PLL4, 4, 9, 64 },
> + { 16384000, P_PLL4, 4, 1, 6 },
> + { 16934400, P_PLL4, 4, 41, 238 },
> + { 18432000, P_PLL4, 4, 3, 16 },
> + { 22579200, P_PLL4, 2, 24, 209 },
> + { 24576000, P_PLL4, 4, 1, 4 },
> + { 27648000, P_PLL4, 4, 9, 32 },
> + { 33868800, P_PLL4, 4, 41, 119 },
> + { 36864000, P_PLL4, 4, 3, 8 },
> + { 45158400, P_PLL4, 1, 24, 209 },
> + { 49152000, P_PLL4, 4, 1, 2 },
> + { 50803200, P_PLL4, 1, 27, 209 },
> + { }
> +};
> +
> +static struct clk_rcg mi2s_osr_src = {
> + .ns_reg = 0x48,
> + .md_reg = 0x4c,
> + .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_pxo_pll4_map,
> + },
> + .freq_tbl = clk_tbl_aif_mi2s,
> + .clkr = {
> + .enable_reg = 0x48,
> + .enable_mask = BIT(9),
> + .hw.init = &(struct clk_init_data){
> + .name = "mi2s_osr_src",
> + .parent_names = lcc_pxo_pll4,
> + .num_parents = 2,
> + .ops = &clk_rcg_ops,
> + .flags = CLK_SET_RATE_GATE,
> + },
> + },
> +};
> +
> +static const char *lcc_mi2s_parents[] = {
> + "mi2s_osr_src",
> +};
> +
> +static struct clk_branch mi2s_osr_clk = {
> + .halt_reg = 0x50,
> + .halt_bit = 1,
> + .halt_check = BRANCH_HALT_ENABLE,
> + .clkr = {
> + .enable_reg = 0x48,
> + .enable_mask = BIT(17),
> + .hw.init = &(struct clk_init_data){
> + .name = "mi2s_osr_clk",
> + .parent_names = lcc_mi2s_parents,
> + .num_parents = 1,
> + .ops = &clk_branch_ops,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> + },
> +};
> +
> +static struct clk_regmap_div mi2s_div_clk = {
> + .reg = 0x48,
> + .shift = 10,
> + .width = 4,
> + .clkr = {
> + .hw.init = &(struct clk_init_data){
> + .name = "mi2s_div_clk",
> + .parent_names = lcc_mi2s_parents,
> + .num_parents = 1,
> + .ops = &clk_regmap_div_ops,
> + },
> + },
> +};
> +
> +static struct clk_branch mi2s_bit_div_clk = {
> + .halt_reg = 0x50,
> + .halt_bit = 0,
> + .halt_check = BRANCH_HALT_ENABLE,
> + .clkr = {
> + .enable_reg = 0x48,
> + .enable_mask = BIT(15),
> + .hw.init = &(struct clk_init_data){
> + .name = "mi2s_bit_div_clk",
> + .parent_names = (const char *[]){ "mi2s_div_clk" },
> + .num_parents = 1,
> + .ops = &clk_branch_ops,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> + },
> +};
> +
> +
> +static struct clk_regmap_mux mi2s_bit_clk = {
> + .reg = 0x48,
> + .shift = 14,
> + .width = 1,
> + .clkr = {
> + .hw.init = &(struct clk_init_data){
> + .name = "mi2s_bit_clk",
> + .parent_names = (const char *[]){
> + "mi2s_bit_div_clk",
> + "mi2s_codec_clk",
> + },
> + .num_parents = 2,
> + .ops = &clk_regmap_mux_closest_ops,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> + },
> +};
> +
> +static struct freq_tbl clk_tbl_pcm[] = {
> + { 64000, P_PLL4, 4, 1, 1536 },
> + { 128000, P_PLL4, 4, 1, 768 },
> + { 256000, P_PLL4, 4, 1, 384 },
> + { 512000, P_PLL4, 4, 1, 192 },
> + { 1024000, P_PLL4, 4, 1, 96 },
> + { 2048000, P_PLL4, 4, 1, 48 },
> + { },
> +};
> +
> +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_pxo_pll4_map,
> + },
> + .freq_tbl = clk_tbl_pcm,
> + .clkr = {
> + .enable_reg = 0x54,
> + .enable_mask = BIT(9),
> + .hw.init = &(struct clk_init_data){
> + .name = "pcm_src",
> + .parent_names = lcc_pxo_pll4,
> + .num_parents = 2,
> + .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 freq_tbl clk_tbl_aif_osr[] = {
> + { 22050, P_PLL4, 1, 147, 20480 },
> + { 32000, P_PLL4, 1, 1, 96 },
> + { 44100, P_PLL4, 1, 147, 10240 },
> + { 48000, P_PLL4, 1, 1, 64 },
> + { 88200, P_PLL4, 1, 147, 5120 },
> + { 96000, P_PLL4, 1, 1, 32 },
> + { 176400, P_PLL4, 1, 147, 2560 },
> + { 192000, P_PLL4, 1, 1, 16 },
> + { },
> +};
> +
> +static struct clk_rcg spdif_src = {
> + .ns_reg = 0xcc,
> + .md_reg = 0xd0,
> + .mn = {
> + .mnctr_en_bit = 8,
> + .mnctr_reset_bit = 7,
> + .mnctr_mode_shift = 5,
> + .n_val_shift = 16,
> + .m_val_shift = 16,
> + .width = 8,
> + },
> + .p = {
> + .pre_div_shift = 3,
> + .pre_div_width = 2,
> + },
> + .s = {
> + .src_sel_shift = 0,
> + .parent_map = lcc_pxo_pll4_map,
> + },
> + .freq_tbl = clk_tbl_aif_osr,
> + .clkr = {
> + .enable_reg = 0xcc,
> + .enable_mask = BIT(9),
> + .hw.init = &(struct clk_init_data){
> + .name = "spdif_src",
> + .parent_names = lcc_pxo_pll4,
> + .num_parents = 2,
> + .ops = &clk_rcg_ops,
> + .flags = CLK_SET_RATE_GATE,
> + },
> + },
> +};
> +
> +static const char *lcc_spdif_parents[] = {
> + "spdif_src",
> +};
> +
> +static struct clk_branch spdif_clk = {
> + .halt_reg = 0xd4,
> + .halt_bit = 1,
> + .halt_check = BRANCH_HALT_ENABLE,
> + .clkr = {
> + .enable_reg = 0xcc,
> + .enable_mask = BIT(12),
> + .hw.init = &(struct clk_init_data){
> + .name = "spdif_clk",
> + .parent_names = lcc_spdif_parents,
> + .num_parents = 1,
> + .ops = &clk_branch_ops,
> + .flags = CLK_SET_RATE_PARENT,
> + },
> + },
> +};
> +
> +static struct freq_tbl clk_tbl_ahbix[] = {
> + { 131072, P_PLL4, 1, 1, 3 },
> + { },
> +};
> +
> +static struct clk_rcg ahbix_clk = {
> + .ns_reg = 0x38,
> + .md_reg = 0x3c,
> + .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_pxo_pll4_map,
> + },
> + .freq_tbl = clk_tbl_ahbix,
> + .clkr = {
> + .enable_reg = 0x38,
> + .enable_mask = BIT(10), /* toggle the gfmux to select mn/pxo */
> + .hw.init = &(struct clk_init_data){
> + .name = "ahbix",
> + .parent_names = lcc_pxo_pll4,
> + .num_parents = 2,
> + .ops = &clk_rcg_ops,
> + .flags = CLK_SET_RATE_GATE,
> + },
> + },
> +};
> +
> +static struct clk_regmap *lcc_ipq806x_clks[] = {
> + [PLL4] = &pll4.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,
> + [PCM_SRC] = &pcm_src.clkr,
> + [PCM_CLK_OUT] = &pcm_clk_out.clkr,
> + [PCM_CLK] = &pcm_clk.clkr,
> + [SPDIF_SRC] = &spdif_src.clkr,
> + [SPDIF_CLK] = &spdif_clk.clkr,
> + [AHBIX_CLK] = &ahbix_clk.clkr,
> +};
> +
> +static const struct regmap_config lcc_ipq806x_regmap_config = {
> + .reg_bits = 32,
> + .reg_stride = 4,
> + .val_bits = 32,
> + .max_register = 0xfc,
> + .fast_io = true,
> +};
> +
> +static const struct qcom_cc_desc lcc_ipq806x_desc = {
> + .config = &lcc_ipq806x_regmap_config,
> + .clks = lcc_ipq806x_clks,
> + .num_clks = ARRAY_SIZE(lcc_ipq806x_clks),
> +};
> +
> +static const struct of_device_id lcc_ipq806x_match_table[] = {
> + { .compatible = "qcom,lcc-ipq8064" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, lcc_ipq806x_match_table);
> +
> +static int lcc_ipq806x_probe(struct platform_device *pdev)
> +{
> + u32 val;
> + struct regmap *regmap;
> +
> + regmap = qcom_cc_map(pdev, &lcc_ipq806x_desc);
> + if (IS_ERR(regmap))
> + return PTR_ERR(regmap);
> +
> + /* Configure the rate of PLL4 if the bootloader hasn't already */
> + val = regmap_read(regmap, 0x0, &val);
> + if (!val)
> + clk_pll_configure_sr(&pll4, regmap, &pll4_config, true);
> + /* Enable PLL4 source on the LPASS Primary PLL Mux */
> + regmap_write(regmap, 0xc4, 0x1);
> +
> + return qcom_cc_really_probe(pdev, &lcc_ipq806x_desc, regmap);
> +}
> +
> +static int lcc_ipq806x_remove(struct platform_device *pdev)
> +{
> + qcom_cc_remove(pdev);
> + return 0;
> +}
> +
> +static struct platform_driver lcc_ipq806x_driver = {
> + .probe = lcc_ipq806x_probe,
> + .remove = lcc_ipq806x_remove,
> + .driver = {
> + .name = "lcc-ipq806x",
> + .owner = THIS_MODULE,
> + .of_match_table = lcc_ipq806x_match_table,
> + },
> +};
> +module_platform_driver(lcc_ipq806x_driver);
> +
> +MODULE_DESCRIPTION("QCOM LCC IPQ806x Driver");
> +MODULE_LICENSE("GPL v2");
> +MODULE_ALIAS("platform:lcc-ipq806x");
> --
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>
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