Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 170 insertions, 0 deletions

diff --git a/drivers/clk/mstar/Kconfig b/drivers/clk/mstar/Kconfig
new file mode 100644
index 000000000..de37e1bce
--- /dev/null
+++ b/drivers/clk/mstar/Kconfig
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config MSTAR_MSC313_MPLL
+	bool "MStar MPLL driver"
+	depends on ARCH_MSTARV7 || COMPILE_TEST
+	default ARCH_MSTARV7
+	select REGMAP_MMIO
+	help
+	  Support for the MPLL PLL and dividers block present on
+	  MStar/Sigmastar SoCs.
diff --git a/drivers/clk/mstar/Makefile b/drivers/clk/mstar/Makefile
new file mode 100644
index 000000000..f8dcd25ed
--- /dev/null
+++ b/drivers/clk/mstar/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for mstar specific clk
+#
+
+obj-$(CONFIG_MSTAR_MSC313_MPLL) += clk-msc313-mpll.o
diff --git a/drivers/clk/mstar/clk-msc313-mpll.c b/drivers/clk/mstar/clk-msc313-mpll.c
new file mode 100644
index 000000000..61beb4e87
--- /dev/null
+++ b/drivers/clk/mstar/clk-msc313-mpll.c
@@ -0,0 +1,155 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * MStar MSC313 MPLL driver
+ *
+ * Copyright (C) 2020 Daniel Palmer <daniel@thingy.jp>
+ */
+
+#include <linux/platform_device.h>
+#include <linux/of_address.h>
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+
+#define REG_CONFIG1	0x8
+#define REG_CONFIG2	0xc
+
+static const struct regmap_config msc313_mpll_regmap_config = {
+	.reg_bits = 16,
+	.val_bits = 16,
+	.reg_stride = 4,
+};
+
+static const struct reg_field config1_loop_div_first = REG_FIELD(REG_CONFIG1, 8, 9);
+static const struct reg_field config1_input_div_first = REG_FIELD(REG_CONFIG1, 4, 5);
+static const struct reg_field config2_output_div_first = REG_FIELD(REG_CONFIG2, 12, 13);
+static const struct reg_field config2_loop_div_second = REG_FIELD(REG_CONFIG2, 0, 7);
+
+static const unsigned int output_dividers[] = {
+	2, 3, 4, 5, 6, 7, 10
+};
+
+#define NUMOUTPUTS (ARRAY_SIZE(output_dividers) + 1)
+
+struct msc313_mpll {
+	struct clk_hw clk_hw;
+	struct regmap_field *input_div;
+	struct regmap_field *loop_div_first;
+	struct regmap_field *loop_div_second;
+	struct regmap_field *output_div;
+	struct clk_hw_onecell_data *clk_data;
+};
+
+#define to_mpll(_hw) container_of(_hw, struct msc313_mpll, clk_hw)
+
+static unsigned long msc313_mpll_recalc_rate(struct clk_hw *hw,
+		unsigned long parent_rate)
+{
+	struct msc313_mpll *mpll = to_mpll(hw);
+	unsigned int input_div, output_div, loop_first, loop_second;
+	unsigned long output_rate;
+
+	regmap_field_read(mpll->input_div, &input_div);
+	regmap_field_read(mpll->output_div, &output_div);
+	regmap_field_read(mpll->loop_div_first, &loop_first);
+	regmap_field_read(mpll->loop_div_second, &loop_second);
+
+	output_rate = parent_rate / (1 << input_div);
+	output_rate *= (1 << loop_first) * max(loop_second, 1U);
+	output_rate /= max(output_div, 1U);
+
+	return output_rate;
+}
+
+static const struct clk_ops msc313_mpll_ops = {
+	.recalc_rate = msc313_mpll_recalc_rate,
+};
+
+static const struct clk_parent_data mpll_parent = {
+	.index	= 0,
+};
+
+static int msc313_mpll_probe(struct platform_device *pdev)
+{
+	void __iomem *base;
+	struct msc313_mpll *mpll;
+	struct clk_init_data clk_init = { };
+	struct device *dev = &pdev->dev;
+	struct regmap *regmap;
+	char *outputname;
+	struct clk_hw *divhw;
+	int ret, i;
+
+	mpll = devm_kzalloc(dev, sizeof(*mpll), GFP_KERNEL);
+	if (!mpll)
+		return -ENOMEM;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	regmap = devm_regmap_init_mmio(dev, base, &msc313_mpll_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	mpll->input_div = devm_regmap_field_alloc(dev, regmap, config1_input_div_first);
+	if (IS_ERR(mpll->input_div))
+		return PTR_ERR(mpll->input_div);
+	mpll->output_div = devm_regmap_field_alloc(dev, regmap, config2_output_div_first);
+	if (IS_ERR(mpll->output_div))
+		return PTR_ERR(mpll->output_div);
+	mpll->loop_div_first = devm_regmap_field_alloc(dev, regmap, config1_loop_div_first);
+	if (IS_ERR(mpll->loop_div_first))
+		return PTR_ERR(mpll->loop_div_first);
+	mpll->loop_div_second = devm_regmap_field_alloc(dev, regmap, config2_loop_div_second);
+	if (IS_ERR(mpll->loop_div_second))
+		return PTR_ERR(mpll->loop_div_second);
+
+	mpll->clk_data = devm_kzalloc(dev, struct_size(mpll->clk_data, hws,
+			ARRAY_SIZE(output_dividers)), GFP_KERNEL);
+	if (!mpll->clk_data)
+		return -ENOMEM;
+
+	clk_init.name = dev_name(dev);
+	clk_init.ops = &msc313_mpll_ops;
+	clk_init.parent_data = &mpll_parent;
+	clk_init.num_parents = 1;
+	mpll->clk_hw.init = &clk_init;
+
+	ret = devm_clk_hw_register(dev, &mpll->clk_hw);
+	if (ret)
+		return ret;
+
+	mpll->clk_data->num = NUMOUTPUTS;
+	mpll->clk_data->hws[0] = &mpll->clk_hw;
+
+	for (i = 0; i < ARRAY_SIZE(output_dividers); i++) {
+		outputname = devm_kasprintf(dev, GFP_KERNEL, "%s_div_%u",
+				clk_init.name, output_dividers[i]);
+		if (!outputname)
+			return -ENOMEM;
+		divhw = devm_clk_hw_register_fixed_factor(dev, outputname,
+				clk_init.name, 0, 1, output_dividers[i]);
+		if (IS_ERR(divhw))
+			return PTR_ERR(divhw);
+		mpll->clk_data->hws[i + 1] = divhw;
+	}
+
+	platform_set_drvdata(pdev, mpll);
+
+	return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get,
+			mpll->clk_data);
+}
+
+static const struct of_device_id msc313_mpll_of_match[] = {
+	{ .compatible = "mstar,msc313-mpll", },
+	{}
+};
+
+static struct platform_driver msc313_mpll_driver = {
+	.driver = {
+		.name = "mstar-msc313-mpll",
+		.of_match_table = msc313_mpll_of_match,
+	},
+	.probe = msc313_mpll_probe,
+};
+builtin_platform_driver(msc313_mpll_driver);