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Subject[PATCH v2 09/11] clk: starfive: Add StarFive JH7110 Video-Output clock driver
Date
Add driver for the StarFive JH7110 Video-Output clock controller.

Signed-off-by: Xingyu Wu <xingyu.wu@starfivetech.com>
---
drivers/clk/starfive/Kconfig | 11 +
drivers/clk/starfive/Makefile | 1 +
.../clk/starfive/clk-starfive-jh7110-vout.c | 261 ++++++++++++++++++
3 files changed, 273 insertions(+)
create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-vout.c

diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index 59499acb95f7..5ebf1ed08627 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig
@@ -64,3 +64,14 @@ config CLK_STARFIVE_JH7110_ISP
help
Say yes here to support the Image-Signal-Process clock controller
on the StarFive JH7110 SoC.
+
+config CLK_STARFIVE_JH7110_VOUT
+ tristate "StarFive JH7110 Video-Output clock support"
+ depends on CLK_STARFIVE_JH7110_SYS && JH71XX_PMU
+ select AUXILIARY_BUS
+ select CLK_STARFIVE_JH71X0
+ select RESET_STARFIVE_JH7110
+ default CLK_STARFIVE_JH7110_SYS
+ help
+ Say yes here to support the Video-Output clock controller
+ on the StarFive JH7110 SoC.
diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
index 76fb9f8d628b..841377e45bb6 100644
--- a/drivers/clk/starfive/Makefile
+++ b/drivers/clk/starfive/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7110_SYS) += clk-starfive-jh7110-sys.o
obj-$(CONFIG_CLK_STARFIVE_JH7110_AON) += clk-starfive-jh7110-aon.o
obj-$(CONFIG_CLK_STARFIVE_JH7110_STG) += clk-starfive-jh7110-stg.o
obj-$(CONFIG_CLK_STARFIVE_JH7110_ISP) += clk-starfive-jh7110-isp.o
+obj-$(CONFIG_CLK_STARFIVE_JH7110_VOUT) += clk-starfive-jh7110-vout.o
diff --git a/drivers/clk/starfive/clk-starfive-jh7110-vout.c b/drivers/clk/starfive/clk-starfive-jh7110-vout.c
new file mode 100644
index 000000000000..d786537563a4
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jh7110-vout.c
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JH7110 Video-Output Clock Driver
+ *
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#include <dt-bindings/clock/starfive,jh7110-crg.h>
+
+#include "clk-starfive-jh71x0.h"
+
+/* external clocks */
+#define JH7110_VOUTCLK_VOUT_SRC (JH7110_VOUTCLK_END + 0)
+#define JH7110_VOUTCLK_VOUT_TOP_AHB (JH7110_VOUTCLK_END + 1)
+#define JH7110_VOUTCLK_VOUT_TOP_AXI (JH7110_VOUTCLK_END + 2)
+#define JH7110_VOUTCLK_VOUT_TOP_HDMITX0_MCLK (JH7110_VOUTCLK_END + 3)
+#define JH7110_VOUTCLK_I2STX0_BCLK (JH7110_VOUTCLK_END + 4)
+#define JH7110_VOUTCLK_HDMITX0_PIXELCLK (JH7110_VOUTCLK_END + 5)
+#define JH7110_VOUTCLK_EXT_END (JH7110_VOUTCLK_END + 6)
+
+static const struct jh71x0_clk_data jh7110_voutclk_data[] = {
+ /* divider */
+ JH71X0__DIV(JH7110_VOUTCLK_APB, "apb", 8, JH7110_VOUTCLK_VOUT_TOP_AHB),
+ JH71X0__DIV(JH7110_VOUTCLK_DC8200_PIX, "dc8200_pix", 63, JH7110_VOUTCLK_VOUT_SRC),
+ JH71X0__DIV(JH7110_VOUTCLK_DSI_SYS, "dsi_sys", 31, JH7110_VOUTCLK_VOUT_SRC),
+ JH71X0__DIV(JH7110_VOUTCLK_TX_ESC, "tx_esc", 31, JH7110_VOUTCLK_VOUT_TOP_AHB),
+ /* dc8200 */
+ JH71X0_GATE(JH7110_VOUTCLK_DC8200_AXI, "dc8200_axi", 0, JH7110_VOUTCLK_VOUT_TOP_AXI),
+ JH71X0_GATE(JH7110_VOUTCLK_DC8200_CORE, "dc8200_core", 0, JH7110_VOUTCLK_VOUT_TOP_AXI),
+ JH71X0_GATE(JH7110_VOUTCLK_DC8200_AHB, "dc8200_ahb", 0, JH7110_VOUTCLK_VOUT_TOP_AHB),
+ JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX0, "dc8200_pix0", 0, 2,
+ JH7110_VOUTCLK_DC8200_PIX,
+ JH7110_VOUTCLK_HDMITX0_PIXELCLK),
+ JH71X0_GMUX(JH7110_VOUTCLK_DC8200_PIX1, "dc8200_pix1", 0, 2,
+ JH7110_VOUTCLK_DC8200_PIX,
+ JH7110_VOUTCLK_HDMITX0_PIXELCLK),
+ /* LCD */
+ JH71X0_GMUX(JH7110_VOUTCLK_DOM_VOUT_TOP_LCD, "dom_vout_top_lcd", 0, 2,
+ JH7110_VOUTCLK_DC8200_PIX0,
+ JH7110_VOUTCLK_DC8200_PIX1),
+ /* dsiTx */
+ JH71X0_GATE(JH7110_VOUTCLK_DSITX_APB, "dsiTx_apb", 0, JH7110_VOUTCLK_DSI_SYS),
+ JH71X0_GATE(JH7110_VOUTCLK_DSITX_SYS, "dsiTx_sys", 0, JH7110_VOUTCLK_DSI_SYS),
+ JH71X0_GMUX(JH7110_VOUTCLK_DSITX_DPI, "dsiTx_dpi", 0, 2,
+ JH7110_VOUTCLK_DC8200_PIX,
+ JH7110_VOUTCLK_HDMITX0_PIXELCLK),
+ JH71X0_GATE(JH7110_VOUTCLK_DSITX_TXESC, "dsiTx_txesc", 0, JH7110_VOUTCLK_TX_ESC),
+ /* mipitx DPHY */
+ JH71X0_GATE(JH7110_VOUTCLK_MIPITX_DPHY_TXESC, "mipitx_dphy_txesc", 0,
+ JH7110_VOUTCLK_TX_ESC),
+ /* hdmi */
+ JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_MCLK, "hdmi_tx_mclk", 0,
+ JH7110_VOUTCLK_VOUT_TOP_HDMITX0_MCLK),
+ JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_BCLK, "hdmi_tx_bclk", 0,
+ JH7110_VOUTCLK_I2STX0_BCLK),
+ JH71X0_GATE(JH7110_VOUTCLK_HDMI_TX_SYS, "hdmi_tx_sys", 0, JH7110_VOUTCLK_APB),
+};
+
+struct vout_top_crg {
+ struct clk_bulk_data *top_clks;
+ struct reset_control *top_rst;
+ int top_clks_num;
+ void __iomem *base;
+};
+
+static struct clk_bulk_data jh7110_vout_top_clks[] = {
+ { .id = "vout_src" },
+ { .id = "vout_top_ahb" }
+};
+
+static struct vout_top_crg *top_crg_from(void __iomem **base)
+{
+ return container_of(base, struct vout_top_crg, base);
+}
+
+static int jh7110_vout_top_crg_get(struct jh71x0_clk_priv *priv, struct vout_top_crg *top)
+{
+ int ret;
+
+ top->top_clks = jh7110_vout_top_clks;
+ top->top_clks_num = ARRAY_SIZE(jh7110_vout_top_clks);
+ ret = devm_clk_bulk_get(priv->dev, top->top_clks_num, top->top_clks);
+ if (ret) {
+ dev_err(priv->dev, "top clks get failed: %d\n", ret);
+ return ret;
+ }
+
+ /* The reset should be shared and other Vout modules will use its. */
+ top->top_rst = devm_reset_control_get_shared(priv->dev, NULL);
+ if (IS_ERR(top->top_rst)) {
+ dev_err(priv->dev, "top rst get failed\n");
+ return PTR_ERR(top->top_rst);
+ }
+
+ return 0;
+}
+
+static int jh7110_vout_top_crg_enable(struct vout_top_crg *top)
+{
+ int ret;
+
+ ret = clk_bulk_prepare_enable(top->top_clks_num, top->top_clks);
+ if (ret)
+ return ret;
+
+ return reset_control_deassert(top->top_rst);
+}
+
+static void jh7110_vout_top_crg_disable(struct vout_top_crg *top)
+{
+ clk_bulk_disable_unprepare(top->top_clks_num, top->top_clks);
+}
+
+static struct clk_hw *jh7110_voutclk_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct jh71x0_clk_priv *priv = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx < JH7110_VOUTCLK_END)
+ return &priv->reg[idx].hw;
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int jh7110_voutcrg_probe(struct platform_device *pdev)
+{
+ struct jh71x0_clk_priv *priv;
+ struct vout_top_crg *top;
+ unsigned int idx;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev,
+ struct_size(priv, reg, JH7110_VOUTCLK_END),
+ GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ top = devm_kzalloc(&pdev->dev, sizeof(*top), GFP_KERNEL);
+ if (!top)
+ return -ENOMEM;
+
+ spin_lock_init(&priv->rmw_lock);
+ priv->dev = &pdev->dev;
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ top->base = priv->base;
+ dev_set_drvdata(priv->dev, (void *)(&top->base));
+
+ pm_runtime_enable(priv->dev);
+ ret = pm_runtime_get_sync(priv->dev);
+ if (ret < 0) {
+ dev_err(priv->dev, "failed to turn power: %d\n", ret);
+ return ret;
+ }
+
+ ret = jh7110_vout_top_crg_get(priv, top);
+ if (ret)
+ goto err_clk;
+
+ ret = jh7110_vout_top_crg_enable(top);
+ if (ret)
+ goto err_clk;
+
+ for (idx = 0; idx < JH7110_VOUTCLK_END; idx++) {
+ u32 max = jh7110_voutclk_data[idx].max;
+ struct clk_parent_data parents[4] = {};
+ struct clk_init_data init = {
+ .name = jh7110_voutclk_data[idx].name,
+ .ops = starfive_jh71x0_clk_ops(max),
+ .parent_data = parents,
+ .num_parents =
+ ((max & JH71X0_CLK_MUX_MASK) >> JH71X0_CLK_MUX_SHIFT) + 1,
+ .flags = jh7110_voutclk_data[idx].flags,
+ };
+ struct jh71x0_clk *clk = &priv->reg[idx];
+ unsigned int i;
+ char *fw_name[JH7110_VOUTCLK_EXT_END - JH7110_VOUTCLK_END] = {
+ "vout_src",
+ "vout_top_ahb",
+ "vout_top_axi",
+ "vout_top_hdmitx0_mclk",
+ "i2stx0_bclk",
+ "hdmitx0_pixelclk"
+ };
+
+ for (i = 0; i < init.num_parents; i++) {
+ unsigned int pidx = jh7110_voutclk_data[idx].parents[i];
+
+ if (pidx < JH7110_VOUTCLK_END)
+ parents[i].hw = &priv->reg[pidx].hw;
+ else if (pidx < JH7110_VOUTCLK_EXT_END)
+ parents[i].fw_name = fw_name[pidx - JH7110_VOUTCLK_END];
+ }
+
+ clk->hw.init = &init;
+ clk->idx = idx;
+ clk->max_div = max & JH71X0_CLK_DIV_MASK;
+
+ ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
+ if (ret)
+ goto err_exit;
+ }
+
+ ret = devm_of_clk_add_hw_provider(&pdev->dev, jh7110_voutclk_get, priv);
+ if (ret)
+ goto err_exit;
+
+ ret = jh7110_reset_controller_register(priv, "reset-vout", 4);
+ if (ret)
+ goto err_exit;
+
+ return 0;
+
+err_exit:
+ jh7110_vout_top_crg_disable(top);
+err_clk:
+ pm_runtime_put_sync(priv->dev);
+ pm_runtime_disable(priv->dev);
+ return ret;
+}
+
+static int jh7110_voutcrg_remove(struct platform_device *pdev)
+{
+ void __iomem **base = dev_get_drvdata(&pdev->dev);
+ struct vout_top_crg *top = top_crg_from(base);
+
+ jh7110_vout_top_crg_disable(top);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id jh7110_voutcrg_match[] = {
+ { .compatible = "starfive,jh7110-voutcrg" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh7110_voutcrg_match);
+
+static struct platform_driver jh7110_voutcrg_driver = {
+ .probe = jh7110_voutcrg_probe,
+ .remove = jh7110_voutcrg_remove,
+ .driver = {
+ .name = "clk-starfive-jh7110-vout",
+ .of_match_table = jh7110_voutcrg_match,
+ },
+};
+module_platform_driver(jh7110_voutcrg_driver);
+
+MODULE_AUTHOR("Xingyu Wu <xingyu.wu@starfivetech.com>");
+MODULE_DESCRIPTION("StarFive JH7110 Video-Output clock driver");
+MODULE_LICENSE("GPL");
--
2.25.1
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