[RFC 12/16] clk: starfive: Add JH8100 South-West clock generator driver
From: Sia Jee Heng
Date: Tue Dec 26 2023 - 00:43:05 EST
Add support for JH8100 South-West (SWCRG) clock generator.
Signed-off-by: Sia Jee Heng <jeeheng.sia@xxxxxxxxxxxxxxxx>
Reviewed-by: Ley Foon Tan <leyfoon.tan@xxxxxxxxxxxxxxxx>
---
drivers/clk/starfive/Kconfig | 7 +
drivers/clk/starfive/Makefile | 1 +
drivers/clk/starfive/clk-starfive-jh8100-sw.c | 134 ++++++++++++++++++
3 files changed, 142 insertions(+)
create mode 100644 drivers/clk/starfive/clk-starfive-jh8100-sw.c
diff --git a/drivers/clk/starfive/Kconfig b/drivers/clk/starfive/Kconfig
index 23968e97969b..23ae894fedb9 100644
--- a/drivers/clk/starfive/Kconfig
+++ b/drivers/clk/starfive/Kconfig
@@ -95,3 +95,10 @@ config CLK_STARFIVE_JH8100_NE
default ARCH_STARFIVE
help
Say yes here to support the North-East clock controller on the StarFive JH8100 SoC.
+
+config CLK_STARFIVE_JH8100_SW
+ bool "StarFive JH8100 South-West clock support"
+ depends on CLK_STARFIVE_JH8100_SYS
+ default ARCH_STARFIVE
+ help
+ Say yes here to support the South-West clock controller on the StarFive JH8100 SoC.
diff --git a/drivers/clk/starfive/Makefile b/drivers/clk/starfive/Makefile
index cecce3655600..242e2e75dadb 100644
--- a/drivers/clk/starfive/Makefile
+++ b/drivers/clk/starfive/Makefile
@@ -14,3 +14,4 @@ obj-$(CONFIG_CLK_STARFIVE_JH7110_VOUT) += clk-starfive-jh7110-vout.o
obj-$(CONFIG_CLK_STARFIVE_JH8100_SYS) += clk-starfive-jh8100-sys.o
obj-$(CONFIG_CLK_STARFIVE_JH8100_NW) += clk-starfive-jh8100-nw.o
obj-$(CONFIG_CLK_STARFIVE_JH8100_NE) += clk-starfive-jh8100-ne.o
+obj-$(CONFIG_CLK_STARFIVE_JH8100_SW) += clk-starfive-jh8100-sw.o
diff --git a/drivers/clk/starfive/clk-starfive-jh8100-sw.c b/drivers/clk/starfive/clk-starfive-jh8100-sw.c
new file mode 100644
index 000000000000..f583f7d984ed
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jh8100-sw.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * StarFive JH8100 South-West Clock Driver
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ *
+ * Author: Jee Heng Sia <jeeheng.sia@xxxxxxxxxxxxxxxx>
+ *
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/clock/starfive,jh8100-crg.h>
+
+#include "clk-starfive-jh8100.h"
+
+#define JH8100_SWCLK_NUM_CLKS (JH8100_SWCLK_VDEC_ICG_EN + 1)
+
+/* external clocks */
+#define JH8100_SWCLK_APB_BUS (JH8100_SWCLK_NUM_CLKS + 0)
+#define JH8100_SWCLK_VDEC_ROOT (JH8100_SWCLK_NUM_CLKS + 1)
+#define JH8100_SWCLK_FLEXNOC1 (JH8100_SWCLK_NUM_CLKS + 2)
+
+static const struct starfive_clk_data jh8100_swcrg_clk_data[] = {
+ /* jpeg */
+ STARFIVE__DIV(JH8100_SWCLK_JPEG_AXI, "jpeg_axi", 20, JH8100_SWCLK_VDEC_ROOT),
+ STARFIVE_GATE(JH8100_SWCLK_VC9000DJ_AXI, "vc9000dj_axi", CLK_IGNORE_UNUSED,
+ JH8100_SWCLK_JPEG_AXI),
+ STARFIVE_GDIV(JH8100_SWCLK_VC9000DJ_VDEC, "vc9000dj_vdec", CLK_IGNORE_UNUSED, 40,
+ JH8100_SWCLK_VDEC_ROOT),
+ STARFIVE_GATE(JH8100_SWCLK_VC9000DJ_APB, "vc9000dj_apb", CLK_IGNORE_UNUSED,
+ JH8100_SWCLK_APB_BUS),
+ /* video dec */
+ STARFIVE__DIV(JH8100_SWCLK_VDEC_AXI, "vdec_axi", 20, JH8100_SWCLK_VDEC_ROOT),
+ STARFIVE_GATE(JH8100_SWCLK_VC9000D_AXI, "vc9000d_axi", CLK_IGNORE_UNUSED,
+ JH8100_SWCLK_VDEC_AXI),
+ STARFIVE_GDIV(JH8100_SWCLK_VC9000D_VDEC, "vc9000d_vdec", CLK_IGNORE_UNUSED, 40,
+ JH8100_SWCLK_FLEXNOC1),
+ STARFIVE_GATE(JH8100_SWCLK_VC9000D_APB, "vc9000d_apb", CLK_IGNORE_UNUSED,
+ JH8100_SWCLK_APB_BUS),
+ /* icg_en */
+ STARFIVE_GATE(JH8100_SWCLK_JPEG_ICG_EN, "jpeg_en", 0, JH8100_SWCLK_VDEC_ROOT),
+ STARFIVE_GATE(JH8100_SWCLK_VDEC_ICG_EN, "vdec_en", 0, JH8100_SWCLK_VDEC_AXI),
+};
+
+static struct clk_hw *jh8100_swcrg_clk_get(struct of_phandle_args *clkspec, void *data)
+{
+ struct starfive_clk_priv *priv = data;
+ unsigned int idx = clkspec->args[0];
+
+ if (idx < JH8100_SWCLK_NUM_CLKS)
+ return &priv->reg[idx].hw;
+
+ return ERR_PTR(-EINVAL);
+}
+
+static int jh8100_swcrg_probe(struct platform_device *pdev)
+{
+ struct starfive_clk_priv *priv;
+ unsigned int idx;
+ int ret;
+
+ priv = devm_kzalloc(&pdev->dev,
+ struct_size(priv, reg, JH8100_SWCLK_NUM_CLKS),
+ GFP_KERNEL);
+ if (!priv)
+ 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);
+
+ for (idx = 0; idx < JH8100_SWCLK_NUM_CLKS; idx++) {
+ u32 max = jh8100_swcrg_clk_data[idx].max;
+ struct clk_parent_data parents[4] = {};
+ struct clk_init_data init = {
+ .name = jh8100_swcrg_clk_data[idx].name,
+ .ops = starfive_clk_ops(max),
+ .parent_data = parents,
+ .num_parents =
+ ((max & STARFIVE_CLK_MUX_MASK) >> STARFIVE_CLK_MUX_SHIFT) + 1,
+ .flags = jh8100_swcrg_clk_data[idx].flags,
+ };
+ struct starfive_clk *clk = &priv->reg[idx];
+ unsigned int i;
+
+ for (i = 0; i < init.num_parents; i++) {
+ unsigned int pidx = jh8100_swcrg_clk_data[idx].parents[i];
+
+ if (pidx < JH8100_SWCLK_NUM_CLKS)
+ parents[i].hw = &priv->reg[pidx].hw;
+ else if (pidx == JH8100_SWCLK_APB_BUS)
+ parents[i].fw_name = "apb_bus";
+ else if (pidx == JH8100_SWCLK_VDEC_ROOT)
+ parents[i].fw_name = "vdec_root";
+ else if (pidx == JH8100_SWCLK_FLEXNOC1)
+ parents[i].fw_name = "flexnoc1";
+ }
+
+ clk->hw.init = &init;
+ clk->idx = idx;
+ clk->max_div = max & STARFIVE_CLK_DIV_MASK;
+
+ ret = devm_clk_hw_register(&pdev->dev, &clk->hw);
+ if (ret)
+ return ret;
+ }
+
+ ret = devm_of_clk_add_hw_provider(&pdev->dev, jh8100_swcrg_clk_get, priv);
+ if (ret)
+ return ret;
+
+ return jh8100_reset_controller_register(priv, "rst-sw", 3);
+}
+
+static const struct of_device_id jh8100_swcrg_match[] = {
+ { .compatible = "starfive,jh8100-swcrg" },
+ { /* sentinel */ }
+};
+
+static struct platform_driver jh8100_swcrg_driver = {
+ .driver = {
+ .name = "clk-starfive-jh8100-sw",
+ .of_match_table = jh8100_swcrg_match,
+ .suppress_bind_attrs = true,
+ },
+};
+builtin_platform_driver_probe(jh8100_swcrg_driver, jh8100_swcrg_probe);
--
2.34.1