GFM Muxes in AUDIO_CC control clocks to LPASS WSA and RX Codec Macros.
This patch adds support to these muxes.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
drivers/clk/qcom/Kconfig | 6 +
drivers/clk/qcom/Makefile | 1 +
drivers/clk/qcom/lpass-gfm-sm8250.c | 257 ++++++++++++++++++++++++++++
3 files changed, 264 insertions(+)
create mode 100644 drivers/clk/qcom/lpass-gfm-sm8250.c
diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 3a965bd326d5..b619d861cb2e 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -502,4 +502,10 @@ config KRAITCC
Support for the Krait CPU clocks on Qualcomm devices.
Say Y if you want to support CPU frequency scaling.
+config CLK_GFM_LPASS_SM8250
+ tristate "SM8250 GFM LPASS Clocks"
+ help
+ Support for the Glitch Free Mux (GFM) Low power audio
+ subsystem (LPASS) clocks found on SM8250 SoCs.
+
endif
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 11ae86febe87..6f4f25ba9139 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -19,6 +19,7 @@ clk-qcom-$(CONFIG_QCOM_GDSC) += gdsc.o
# Keep alphabetically sorted by config
obj-$(CONFIG_APQ_GCC_8084) += gcc-apq8084.o
obj-$(CONFIG_APQ_MMCC_8084) += mmcc-apq8084.o
+obj-$(CONFIG_CLK_GFM_LPASS_SM8250) += lpass-gfm-sm8250.o
obj-$(CONFIG_IPQ_APSS_PLL) += apss-ipq-pll.o
obj-$(CONFIG_IPQ_APSS_6018) += apss-ipq6018.o
obj-$(CONFIG_IPQ_GCC_4019) += gcc-ipq4019.o
diff --git a/drivers/clk/qcom/lpass-gfm-sm8250.c b/drivers/clk/qcom/lpass-gfm-sm8250.c
new file mode 100644
index 000000000000..48a73dd97d0d
--- /dev/null
+++ b/drivers/clk/qcom/lpass-gfm-sm8250.c
@@ -0,0 +1,257 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * LPASS Audio CC and Always ON CC Glitch Free Mux clock driver
+ *
+ * Copyright (c) 2020 Linaro Ltd.
+ * Author: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/of_device.h>
+#include <dt-bindings/clock/qcom,sm8250-lpass-audiocc.h>
+
+struct lpass_gfm {
+ struct device *dev;
+ void __iomem *base;
+};
+
+struct clk_gfm {
+ unsigned int mux_reg;
+ unsigned int mux_mask;
+ struct clk_hw hw;
+ struct lpass_gfm *priv;
+ void __iomem *gfm_mux;
+};
+
+#define GFM_MASK BIT(1)
+#define to_clk_gfm(_hw) container_of(_hw, struct clk_gfm, hw)
+
+static u8 clk_gfm_get_parent(struct clk_hw *hw)
+{
+ struct clk_gfm *clk = to_clk_gfm(hw);
+
+ return readl(clk->gfm_mux) & GFM_MASK;
+}
+
+static int clk_gfm_set_parent(struct clk_hw *hw, u8 index)
+{
+ struct clk_gfm *clk = to_clk_gfm(hw);
+ unsigned int val;
+
+ val = readl(clk->gfm_mux);
+
+ if (index)
+ val |= GFM_MASK;
+ else
+ val &= ~GFM_MASK;
+
+ writel(val, clk->gfm_mux);
+
+ return 0;
+}
+
+static const struct clk_ops clk_gfm_ops = {
+ .get_parent = clk_gfm_get_parent,
+ .set_parent = clk_gfm_set_parent,
+ .determine_rate = __clk_mux_determine_rate,
+};
+
+static struct clk_gfm lpass_gfm_wsa_mclk = {
+ .mux_reg = 0x220d8,
+ .mux_mask = BIT(0),
+ .hw.init = &(struct clk_init_data) {
+ .name = "WSA_MCLK",
+ .ops = &clk_gfm_ops,
+ .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
+ .parent_data = (const struct clk_parent_data[]){
+ {
+ .index = 0,
+ .fw_name = "LPASS_CLK_ID_TX_CORE_MCLK",
+ }, {
+ .index = 1,
+ .fw_name = "LPASS_CLK_ID_WSA_CORE_MCLK",
+ },
+ },
+ .num_parents = 2,
+ },
+};
+
+static struct clk_gfm lpass_gfm_wsa_npl = {
+ .mux_reg = 0x220d8,
+ .mux_mask = BIT(0),
+ .hw.init = &(struct clk_init_data) {
+ .name = "WSA_NPL",
+ .ops = &clk_gfm_ops,
+ .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
+ .parent_data = (const struct clk_parent_data[]){
+ {
+ .index = 0,
+ .fw_name = "LPASS_CLK_ID_TX_CORE_NPL_MCLK",
+ }, {
+ .index = 1,
+ .fw_name = "LPASS_CLK_ID_WSA_CORE_NPL_MCLK",
+ },
+ },
+ .num_parents = 2,
+ },
+};
+
+static struct clk_gfm lpass_gfm_rx_mclk_mclk2 = {
+ .mux_reg = 0x240d8,
+ .mux_mask = BIT(0),
+ .hw.init = &(struct clk_init_data) {
+ .name = "RX_MCLK_MCLK2",
+ .ops = &clk_gfm_ops,
+ .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
+ .parent_data = (const struct clk_parent_data[]){
+ {
+ .index = 0,
+ .fw_name = "LPASS_CLK_ID_TX_CORE_MCLK",
+ }, {
+ .index = 1,
+ .fw_name = "LPASS_CLK_ID_RX_CORE_MCLK",
+ },
+ },
+ .num_parents = 2,
+ },
+};
+
+static struct clk_gfm lpass_gfm_rx_npl = {
+ .mux_reg = 0x240d8,
+ .mux_mask = BIT(0),
+ .hw.init = &(struct clk_init_data) {
+ .name = "RX_NPL",
+ .ops = &clk_gfm_ops,
+ .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE,
+ .parent_data = (const struct clk_parent_data[]){
+ {
+ .index = 0,
+ .fw_name = "LPASS_CLK_ID_TX_CORE_NPL_MCLK",
+ }, {
+ .index = 1,
+ .fw_name = "LPASS_CLK_ID_RX_CORE_NPL_MCLK",
+ },
+ },
+ .num_parents = 2,
+ },
+};
+
+static struct clk_gfm *audiocc_gfm_clks[] = {
+ [LPASS_CDC_WSA_NPL] = &lpass_gfm_wsa_npl,
+ [LPASS_CDC_WSA_MCLK] = &lpass_gfm_wsa_mclk,
+ [LPASS_CDC_RX_NPL] = &lpass_gfm_rx_npl,
+ [LPASS_CDC_RX_MCLK_MCLK2] = &lpass_gfm_rx_mclk_mclk2,
+};
+
+static struct clk_hw_onecell_data audiocc_hw_onecell_data = {
+ .hws = {
+ [LPASS_CDC_WSA_NPL] = &lpass_gfm_wsa_npl.hw,
+ [LPASS_CDC_WSA_MCLK] = &lpass_gfm_wsa_mclk.hw,
+ [LPASS_CDC_RX_NPL] = &lpass_gfm_rx_npl.hw,
+ [LPASS_CDC_RX_MCLK_MCLK2] = &lpass_gfm_rx_mclk_mclk2.hw,
+ },
+ .num = ARRAY_SIZE(audiocc_gfm_clks),
+};
+
+struct lpass_gfm_data {
+ struct clk_hw_onecell_data *onecell_data;
+ struct clk_gfm **gfm_clks;
+};
+
+static struct lpass_gfm_data audiocc_data = {
+ .onecell_data = &audiocc_hw_onecell_data,
+ .gfm_clks = audiocc_gfm_clks,
+};
+
+static int lpass_gfm_clk_driver_probe(struct platform_device *pdev)
+{
+ const struct lpass_gfm_data *data;
+ struct device *dev = &pdev->dev;
+ struct clk_gfm *gfm;
+ struct lpass_gfm *cc;
+ int err, i;
+
+ data = of_device_get_match_data(dev);
+ if (!data)
+ return -EINVAL;
+
+ cc = devm_kzalloc(dev, sizeof(*cc), GFP_KERNEL);
+ if (!cc)
+ return -ENOMEM;
+
+ cc->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(cc->base))
+ return PTR_ERR(cc->base);
+
+ pm_runtime_enable(dev);
+ err = pm_clk_create(dev);
+ if (err)
+ goto pm_clk_err;
+
+ err = of_pm_clk_add_clks(dev);
+ if (err < 0) {
+ dev_dbg(dev, "Failed to get lpass core voting clocks\n");
+ goto clk_reg_err;
+ }
+
+ for (i = 0; i < data->onecell_data->num; i++) {
+ if (!data->gfm_clks[i])
+ continue;
+
+ gfm = data->gfm_clks[i];
+ gfm->priv = cc;
+ gfm->gfm_mux = cc->base;
+ gfm->gfm_mux = gfm->gfm_mux + data->gfm_clks[i]->mux_reg;
+
+ err = devm_clk_hw_register(dev, &data->gfm_clks[i]->hw);
+ if (err)
+ goto clk_reg_err;
+
+ }
+
+ err = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
+ data->onecell_data);
+ if (err)
+ goto clk_reg_err;
+
+ return 0;
+
+clk_reg_err:
+ pm_clk_destroy(dev);
+pm_clk_err:
+ pm_runtime_disable(dev);
+ return err;
+}
+
+static const struct of_device_id lpass_gfm_clk_match_table[] = {
+ {
+ .compatible = "qcom,sm8250-lpass-audiocc",
+ .data = &audiocc_data,
+ },
+ { }
+};
+MODULE_DEVICE_TABLE(of, lpass_gfm_clk_match_table);
+
+static const struct dev_pm_ops lpass_gfm_pm_ops = {
+ SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
+};
+
+static struct platform_driver lpass_gfm_clk_driver = {
+ .probe = lpass_gfm_clk_driver_probe,
+ .driver = {
+ .name = "lpass-gfm-clk",
+ .of_match_table = lpass_gfm_clk_match_table,
+ .pm = &lpass_gfm_pm_ops,
+ },
+};
+module_platform_driver(lpass_gfm_clk_driver);
+MODULE_LICENSE("GPL v2");
--
2.21.0
