[PATCH v8 4/9] clk: starfive: Add StarFive JH7110 Image-Signal-Process clock driver
Xingyu Wu
xingyu.wu at starfivetech.com
Thu Jul 13 04:38:57 PDT 2023
Add driver for the StarFive JH7110 Image-Signal-Process clock controller.
And these clock controllers should power on and enable the clocks from
SYSCRG before registering.
Acked-by: Palmer Dabbelt <palmer at rivosinc.com>
Reviewed-by: Emil Renner Berthing <emil.renner.berthing at canonical.com>
Reviewed-by: Hal Feng <hal.feng at starfivetech.com>
Signed-off-by: Xingyu Wu <xingyu.wu at starfivetech.com>
---
drivers/clk/starfive/Kconfig | 8 +
drivers/clk/starfive/Makefile | 1 +
.../clk/starfive/clk-starfive-jh7110-isp.c | 232 ++++++++++++++++++
drivers/clk/starfive/clk-starfive-jh7110.h | 6 +
4 files changed, 247 insertions(+)
create mode 100644 drivers/clk/starfive/clk-starfive-jh7110-isp.c
diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index eb1023b5e95a..13b4d08cbcd2 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig
@@ -47,3 +47,11 @@ config CLK_STARFIVE_JH7110_STG
help
Say yes here to support the System-Top-Group clock controller
on the StarFive JH7110 SoC.
+
+config CLK_STARFIVE_JH7110_ISP
+ tristate "StarFive JH7110 Image-Signal-Process clock support"
+ depends on CLK_STARFIVE_JH7110_SYS && JH71XX_PMU
+ default m if ARCH_STARFIVE
+ help
+ Say yes here to support the Image-Signal-Process clock controller
+ on the StarFive JH7110 SoC.
diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
index b81e97ee2659..76fb9f8d628b 100644
--- a/drivers/clk/starfive/Makefile
+++ b/drivers/clk/starfive/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7100_AUDIO) += clk-starfive-jh7100-audio.o
obj-$(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
diff --git a/drivers/clk/starfive/clk-starfive-jh7110-isp.c b/drivers/clk/starfive/clk-starfive-jh7110-isp.c
new file mode 100644
index 000000000000..ce034ed28532
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jh7110-isp.c
@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JH7110 Image-Signal-Process Clock Driver
+ *
+ * Copyright (C) 2022-2023 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/io.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-jh7110.h"
+
+/* external clocks */
+#define JH7110_ISPCLK_ISP_TOP_CORE (JH7110_ISPCLK_END + 0)
+#define JH7110_ISPCLK_ISP_TOP_AXI (JH7110_ISPCLK_END + 1)
+#define JH7110_ISPCLK_NOC_BUS_ISP_AXI (JH7110_ISPCLK_END + 2)
+#define JH7110_ISPCLK_DVP_CLK (JH7110_ISPCLK_END + 3)
+#define JH7110_ISPCLK_EXT_END (JH7110_ISPCLK_END + 4)
+
+static struct clk_bulk_data jh7110_isp_top_clks[] = {
+ { .id = "isp_top_core" },
+ { .id = "isp_top_axi" }
+};
+
+static const struct jh71x0_clk_data jh7110_ispclk_data[] = {
+ /* syscon */
+ JH71X0__DIV(JH7110_ISPCLK_DOM4_APB_FUNC, "dom4_apb_func", 15,
+ JH7110_ISPCLK_ISP_TOP_AXI),
+ JH71X0__DIV(JH7110_ISPCLK_MIPI_RX0_PXL, "mipi_rx0_pxl", 8,
+ JH7110_ISPCLK_ISP_TOP_CORE),
+ JH71X0__INV(JH7110_ISPCLK_DVP_INV, "dvp_inv", JH7110_ISPCLK_DVP_CLK),
+ /* vin */
+ JH71X0__DIV(JH7110_ISPCLK_M31DPHY_CFG_IN, "m31dphy_cfg_in", 16,
+ JH7110_ISPCLK_ISP_TOP_CORE),
+ JH71X0__DIV(JH7110_ISPCLK_M31DPHY_REF_IN, "m31dphy_ref_in", 16,
+ JH7110_ISPCLK_ISP_TOP_CORE),
+ JH71X0__DIV(JH7110_ISPCLK_M31DPHY_TX_ESC_LAN0, "m31dphy_tx_esc_lan0", 60,
+ JH7110_ISPCLK_ISP_TOP_CORE),
+ JH71X0_GATE(JH7110_ISPCLK_VIN_APB, "vin_apb", 0,
+ JH7110_ISPCLK_DOM4_APB_FUNC),
+ JH71X0__DIV(JH7110_ISPCLK_VIN_SYS, "vin_sys", 8, JH7110_ISPCLK_ISP_TOP_CORE),
+ JH71X0_GATE(JH7110_ISPCLK_VIN_PIXEL_IF0, "vin_pixel_if0", 0,
+ JH7110_ISPCLK_MIPI_RX0_PXL),
+ JH71X0_GATE(JH7110_ISPCLK_VIN_PIXEL_IF1, "vin_pixel_if1", 0,
+ JH7110_ISPCLK_MIPI_RX0_PXL),
+ JH71X0_GATE(JH7110_ISPCLK_VIN_PIXEL_IF2, "vin_pixel_if2", 0,
+ JH7110_ISPCLK_MIPI_RX0_PXL),
+ JH71X0_GATE(JH7110_ISPCLK_VIN_PIXEL_IF3, "vin_pixel_if3", 0,
+ JH7110_ISPCLK_MIPI_RX0_PXL),
+ JH71X0__MUX(JH7110_ISPCLK_VIN_P_AXI_WR, "vin_p_axi_wr", 2,
+ JH7110_ISPCLK_MIPI_RX0_PXL,
+ JH7110_ISPCLK_DVP_INV),
+ /* ispv2_top_wrapper */
+ JH71X0_GMUX(JH7110_ISPCLK_ISPV2_TOP_WRAPPER_C, "ispv2_top_wrapper_c", 0, 2,
+ JH7110_ISPCLK_MIPI_RX0_PXL,
+ JH7110_ISPCLK_DVP_INV),
+};
+
+static inline int jh7110_isp_top_rst_init(struct jh71x0_clk_priv *priv)
+{
+ struct reset_control *top_rsts;
+
+ /* The resets should be shared and other ISP modules will use its. */
+ top_rsts = devm_reset_control_array_get_shared(priv->dev);
+ if (IS_ERR(top_rsts))
+ return dev_err_probe(priv->dev, PTR_ERR(top_rsts),
+ "failed to get top resets\n");
+
+ return reset_control_deassert(top_rsts);
+}
+
+static struct clk_hw *jh7110_ispclk_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct jh71x0_clk_priv *priv = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx < JH7110_ISPCLK_END)
+ return &priv->reg[idx].hw;
+
+ return ERR_PTR(-EINVAL);
+}
+
+#ifdef CONFIG_PM
+static int jh7110_ispcrg_suspend(struct device *dev)
+{
+ struct jh7110_top_sysclk *top = dev_get_drvdata(dev);
+
+ clk_bulk_disable_unprepare(top->top_clks_num, top->top_clks);
+
+ return 0;
+}
+
+static int jh7110_ispcrg_resume(struct device *dev)
+{
+ struct jh7110_top_sysclk *top = dev_get_drvdata(dev);
+
+ return clk_bulk_prepare_enable(top->top_clks_num, top->top_clks);
+}
+
+static const struct dev_pm_ops jh7110_ispcrg_pm_ops = {
+ RUNTIME_PM_OPS(jh7110_ispcrg_suspend, jh7110_ispcrg_resume, NULL)
+};
+#endif
+
+static int jh7110_ispcrg_probe(struct platform_device *pdev)
+{
+ struct jh71x0_clk_priv *priv;
+ struct jh7110_top_sysclk *top;
+ unsigned int idx;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev,
+ struct_size(priv, reg, JH7110_ISPCLK_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->top_clks = jh7110_isp_top_clks;
+ top->top_clks_num = ARRAY_SIZE(jh7110_isp_top_clks);
+ ret = devm_clk_bulk_get(priv->dev, top->top_clks_num, top->top_clks);
+ if (ret)
+ return dev_err_probe(priv->dev, ret, "failed to get main clocks\n");
+ dev_set_drvdata(priv->dev, top);
+
+ /* enable power domain and clocks */
+ pm_runtime_enable(priv->dev);
+ ret = pm_runtime_get_sync(priv->dev);
+ if (ret < 0)
+ return dev_err_probe(priv->dev, ret, "failed to turn on power\n");
+
+ ret = jh7110_isp_top_rst_init(priv);
+ if (ret)
+ goto err_exit;
+
+ for (idx = 0; idx < JH7110_ISPCLK_END; idx++) {
+ u32 max = jh7110_ispclk_data[idx].max;
+ struct clk_parent_data parents[4] = {};
+ struct clk_init_data init = {
+ .name = jh7110_ispclk_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_ispclk_data[idx].flags,
+ };
+ struct jh71x0_clk *clk = &priv->reg[idx];
+ unsigned int i;
+ const char *fw_name[JH7110_ISPCLK_EXT_END - JH7110_ISPCLK_END] = {
+ "isp_top_core",
+ "isp_top_axi",
+ "noc_bus_isp_axi",
+ "dvp_clk"
+ };
+
+ for (i = 0; i < init.num_parents; i++) {
+ unsigned int pidx = jh7110_ispclk_data[idx].parents[i];
+
+ if (pidx < JH7110_ISPCLK_END)
+ parents[i].hw = &priv->reg[pidx].hw;
+ else
+ parents[i].fw_name = fw_name[pidx - JH7110_ISPCLK_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_ispclk_get, priv);
+ if (ret)
+ goto err_exit;
+
+ ret = jh7110_reset_controller_register(priv, "rst-isp", 3);
+ if (ret)
+ goto err_exit;
+
+ return 0;
+
+err_exit:
+ pm_runtime_put_sync(priv->dev);
+ pm_runtime_disable(priv->dev);
+ return ret;
+}
+
+static int jh7110_ispcrg_remove(struct platform_device *pdev)
+{
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id jh7110_ispcrg_match[] = {
+ { .compatible = "starfive,jh7110-ispcrg" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh7110_ispcrg_match);
+
+static struct platform_driver jh7110_ispcrg_driver = {
+ .probe = jh7110_ispcrg_probe,
+ .remove = jh7110_ispcrg_remove,
+ .driver = {
+ .name = "clk-starfive-jh7110-isp",
+ .of_match_table = jh7110_ispcrg_match,
+ .pm = pm_ptr(&jh7110_ispcrg_pm_ops),
+ },
+};
+module_platform_driver(jh7110_ispcrg_driver);
+
+MODULE_AUTHOR("Xingyu Wu <xingyu.wu at starfivetech.com>");
+MODULE_DESCRIPTION("StarFive JH7110 Image-Signal-Process clock driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/clk/starfive/clk-starfive-jh7110.h b/drivers/clk/starfive/clk-starfive-jh7110.h
index f29682b8d400..0659adae4d76 100644
--- a/drivers/clk/starfive/clk-starfive-jh7110.h
+++ b/drivers/clk/starfive/clk-starfive-jh7110.h
@@ -4,6 +4,12 @@
#include "clk-starfive-jh71x0.h"
+/* top clocks of ISP/VOUT domain from JH7110 SYSCRG */
+struct jh7110_top_sysclk {
+ struct clk_bulk_data *top_clks;
+ int top_clks_num;
+};
+
int jh7110_reset_controller_register(struct jh71x0_clk_priv *priv,
const char *adev_name,
u32 adev_id);
--
2.25.1
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