[PATCH v2 1/4] clk: imx: imx8mp: Add audiomix block control
Marek Vasut
marex at denx.de
Tue Jun 14 11:02:36 PDT 2022
Unlike the other block control IPs in i.MX8M, the audiomix is mostly a
series of clock gates and muxes. Model it as a large static table of
gates and muxes with one exception, which is the PLL14xx . The PLL14xx
SAI PLL has to be registered separately.
Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Abel Vesa <abel.vesa at nxp.com>
Cc: Fabio Estevam <festevam at gmail.com>
Cc: Jacky Bai <ping.bai at nxp.com>
Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
Cc: Lucas Stach <l.stach at pengutronix.de>
Cc: Michael Turquette <mturquette at baylibre.com>
Cc: Shawn Guo <shawnguo at kernel.org>
Cc: Stephen Boyd <sboyd at kernel.org>
Cc: linux-arm-kernel at lists.infradead.org
To: linux-clk at vger.kernel.org
Cc: linux-imx at nxp.com
---
V2: No change
---
drivers/clk/imx/Makefile | 2 +-
drivers/clk/imx/clk-imx8mp-audiomix.c | 262 ++++++++++++++++++++++++++
2 files changed, 263 insertions(+), 1 deletion(-)
create mode 100644 drivers/clk/imx/clk-imx8mp-audiomix.c
diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index 88b9b9285d22e..c4290937637eb 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -25,7 +25,7 @@ obj-$(CONFIG_MXC_CLK) += mxc-clk.o
obj-$(CONFIG_CLK_IMX8MM) += clk-imx8mm.o
obj-$(CONFIG_CLK_IMX8MN) += clk-imx8mn.o
-obj-$(CONFIG_CLK_IMX8MP) += clk-imx8mp.o
+obj-$(CONFIG_CLK_IMX8MP) += clk-imx8mp.o clk-imx8mp-audiomix.o
obj-$(CONFIG_CLK_IMX8MQ) += clk-imx8mq.o
obj-$(CONFIG_CLK_IMX93) += clk-imx93.o
diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c
new file mode 100644
index 0000000000000..bfa6080f274ff
--- /dev/null
+++ b/drivers/clk/imx/clk-imx8mp-audiomix.c
@@ -0,0 +1,262 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Driver for i.MX8M Plus Audio BLK_CTRL
+ *
+ * Copyright (C) 2022 Marek Vasut <marex at denx.de>
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/clock/imx8mp-clock.h>
+
+#include "clk.h"
+
+#define CLKEN0 0x000
+#define CLKEN1 0x004
+#define SAI_MCLK_SEL(n) (300 + 4 * (n)) /* n in 0..5 */
+#define PDM_SEL 0x318
+#define SAI_PLL_GNRL_CTL 0x400
+
+#define SAIn_MCLK1_PARENT(n) \
+static const char *clk_imx8mp_audiomix_sai##n##_mclk1_parents[] = { \
+ "sai"__stringify(n), "sai"__stringify(n)"_mclk" \
+}
+
+SAIn_MCLK1_PARENT(1);
+SAIn_MCLK1_PARENT(2);
+SAIn_MCLK1_PARENT(3);
+SAIn_MCLK1_PARENT(5);
+SAIn_MCLK1_PARENT(6);
+SAIn_MCLK1_PARENT(7);
+
+static const char *clk_imx8mp_audiomix_sai_mclk2_parents[] = {
+ "sai1", "sai2", "sai3", "dummy",
+ "sai5", "sai6", "sai7",
+ "sai1_mclk", "sai2_mclk", "sai3_mclk", "dummy",
+ "sai5_mclk", "sai6_mclk", "sai7_mclk",
+ "spdif_extclk", "dummy"
+};
+
+static const char *clk_imx8mp_audiomix_pdm_parents[] = {
+ "ccm_pdm", "sai_pll_out_div2", "sai1_mclk", "dummy"
+};
+
+
+static const char * const clk_imx8mp_audiomix_pll_parents[] = {
+ "osc_24m", "dummy", "dummy", "dummy"
+};
+
+static const char * const clk_imx8mp_audiomix_pll_bypass_sels[] = {
+ "sai_pll", "sai_pll_ref_sel"
+};
+
+#define CLK_GATE(name, cname) \
+ { \
+ name"_cg", \
+ IMX8MP_CLK_AUDIOMIX_##cname, \
+ "audio_ahb", NULL, 1, \
+ CLKEN0 + 4 * !!(IMX8MP_CLK_AUDIOMIX_##cname / 32), \
+ 1, IMX8MP_CLK_AUDIOMIX_##cname % 32 \
+ }
+
+#define CLK_SAIn(n) \
+ { \
+ "sai"__stringify(n)"_mclk1_sel", \
+ IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK1_SEL, \
+ NULL, \
+ clk_imx8mp_audiomix_sai##n##_mclk1_parents, \
+ ARRAY_SIZE(clk_imx8mp_audiomix_sai##n##_mclk1_parents), \
+ SAI_MCLK_SEL(n), 1, 0 \
+ }, { \
+ "sai"__stringify(n)"_mclk2_sel", \
+ IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK2_SEL, \
+ NULL, \
+ clk_imx8mp_audiomix_sai_mclk2_parents, \
+ ARRAY_SIZE(clk_imx8mp_audiomix_sai_mclk2_parents), \
+ SAI_MCLK_SEL(n), 4, 1 \
+ }, { \
+ "sai"__stringify(n)"_ipg_cg", \
+ IMX8MP_CLK_AUDIOMIX_SAI##n##_IPG, \
+ "audio_ahb", NULL, 1, \
+ CLKEN0, 1, IMX8MP_CLK_AUDIOMIX_SAI##n##_IPG \
+ }, { \
+ "sai"__stringify(n)"_mclk1_cg", \
+ IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK1, \
+ "sai"__stringify(n)"_mclk1_sel", NULL, 1, \
+ CLKEN0, 1, IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK1 \
+ }, { \
+ "sai"__stringify(n)"_mclk2_cg", \
+ IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK2, \
+ "sai"__stringify(n)"_mclk2_sel", NULL, 1, \
+ CLKEN0, 1, IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK2 \
+ }, { \
+ "sai"__stringify(n)"_mclk3_cg", \
+ IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK3, \
+ "sai_pll_out_div2", NULL, 1, \
+ CLKEN0, 1, IMX8MP_CLK_AUDIOMIX_SAI##n##_MCLK3 \
+ }
+
+#define CLK_PDM \
+ { \
+ "pdm_sel", IMX8MP_CLK_AUDIOMIX_PDM_SEL, NULL, \
+ clk_imx8mp_audiomix_pdm_parents, \
+ ARRAY_SIZE(clk_imx8mp_audiomix_pdm_parents), \
+ PDM_SEL, 2, 0 \
+ }
+
+struct clk_imx8mp_audiomix_sel {
+ const char *name;
+ int clkid;
+ const char *parent; /* For gate */
+ const char **parents; /* For mux */
+ int num_parents;
+ u16 reg;
+ u8 width;
+ u8 shift;
+};
+
+static struct clk_imx8mp_audiomix_sel sels[] = {
+ CLK_GATE("asrc", ASRC_IPG),
+ CLK_GATE("pdm", PDM_IPG),
+ CLK_GATE("earc", EARC_IPG),
+ CLK_GATE("ocrama", OCRAMA_IPG),
+ CLK_GATE("aud2htx", AUD2HTX_IPG),
+ CLK_GATE("earc_phy", EARC_PHY),
+ CLK_GATE("sdma2", SDMA2_ROOT),
+ CLK_GATE("sdma3", SDMA3_ROOT),
+ CLK_GATE("spba2", SPBA2_ROOT),
+ CLK_GATE("dsp", DSP_ROOT),
+ CLK_GATE("dspdbg", DSPDBG_ROOT),
+ CLK_GATE("edma", EDMA_ROOT),
+ CLK_GATE("audpll", AUDPLL_ROOT),
+ CLK_GATE("mu2", MU2_ROOT),
+ CLK_GATE("mu3", MU3_ROOT),
+ CLK_PDM,
+ CLK_SAIn(1),
+ CLK_SAIn(2),
+ CLK_SAIn(3),
+ CLK_SAIn(5),
+ CLK_SAIn(6),
+ CLK_SAIn(7)
+};
+
+struct clk_imx8mp_audiomix_priv {
+ struct clk_hw *clk[IMX8MP_CLK_AUDIOMIX_END];
+};
+
+static struct clk_hw *
+clk_imx8mp_audiomix_of_clk_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct clk_imx8mp_audiomix_priv *priv = data;
+ unsigned int idx = clkspec->args[0];
+
+ return priv->clk[idx];
+}
+
+static int clk_imx8mp_audiomix_probe(struct platform_device *pdev)
+{
+ struct clk_imx8mp_audiomix_priv *priv;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+ void __iomem *base;
+ struct clk_hw *hw;
+ int i;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ for (i = 0; i < ARRAY_SIZE(sels); i++) {
+ if (sels[i].num_parents == 1) {
+ hw = devm_clk_hw_register_gate(dev,
+ sels[i].name,
+ sels[i].parent,
+ 0,
+ base + sels[i].reg,
+ sels[i].shift,
+ 0, NULL);
+ } else {
+ hw = devm_clk_hw_register_mux(dev, sels[i].name,
+ sels[i].parents,
+ sels[i].num_parents,
+ 0,
+ base + sels[i].reg,
+ sels[i].shift,
+ sels[i].width,
+ 0, NULL);
+ }
+
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+
+ priv->clk[sels[i].clkid] = hw;
+ }
+
+ /* SAI PLL */
+ hw = devm_clk_hw_register_mux(dev, "sai_pll_ref_sel",
+ clk_imx8mp_audiomix_pll_parents,
+ ARRAY_SIZE(clk_imx8mp_audiomix_pll_parents),
+ CLK_SET_RATE_NO_REPARENT,
+ base + SAI_PLL_GNRL_CTL, 0, 2, 0, NULL);
+ priv->clk[IMX8MP_CLK_AUDIOMIX_SAI_PLL_REF_SEL] = hw;
+
+ hw = imx_dev_clk_hw_pll14xx(dev, "sai_pll", "sai_pll_ref_sel",
+ base + 0x400, &imx_1443x_pll);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+ priv->clk[IMX8MP_CLK_AUDIOMIX_SAI_PLL] = hw;
+
+ hw = devm_clk_hw_register_mux(dev, "sai_pll_bypass",
+ clk_imx8mp_audiomix_pll_bypass_sels,
+ ARRAY_SIZE(clk_imx8mp_audiomix_pll_bypass_sels),
+ CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
+ base + SAI_PLL_GNRL_CTL, 16, 1, 0, NULL);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+ priv->clk[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw;
+
+ hw = devm_clk_hw_register_gate(dev, "sai_pll_out", "sai_pll_bypass",
+ 0, base + SAI_PLL_GNRL_CTL, 13,
+ 0, NULL);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+ priv->clk[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw;
+
+ hw = devm_clk_hw_register_fixed_factor(dev, "sai_pll_out_div2",
+ "sai_pll_out", 0, 1, 2);
+ if (IS_ERR(hw))
+ return PTR_ERR(hw);
+
+ return devm_of_clk_add_hw_provider(&pdev->dev,
+ clk_imx8mp_audiomix_of_clk_get,
+ priv);
+}
+
+static const struct of_device_id clk_imx8mp_audiomix_of_match[] = {
+ { .compatible = "fsl,imx8mp-audio-blk-ctrl" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, clk_imx8mp_audiomix_of_match);
+
+static struct platform_driver clk_imx8mp_audiomix_driver = {
+ .probe = clk_imx8mp_audiomix_probe,
+ .driver = {
+ .name = "imx8mp-audio-blk-ctrl",
+ .of_match_table = clk_imx8mp_audiomix_of_match,
+ },
+};
+
+module_platform_driver(clk_imx8mp_audiomix_driver);
+
+MODULE_AUTHOR("Marek Vasut <marex at denx.de>");
+MODULE_DESCRIPTION("Freescale i.MX8MP Audio Block Controller driver");
+MODULE_LICENSE("GPL");
--
2.35.1
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