Adding upstream version 5.10.209.upstream/5.10.209upstream

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

1 files changed, 213 insertions, 0 deletions

diff --git a/drivers/clk/samsung/clk-s5pv210-audss.c b/drivers/clk/samsung/clk-s5pv210-audss.c
new file mode 100644
index 000000000..14985ebd0
--- /dev/null
+++ b/drivers/clk/samsung/clk-s5pv210-audss.c
@@ -0,0 +1,213 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014 Tomasz Figa <t.figa@samsung.com>
+ *
+ * Based on Exynos Audio Subsystem Clock Controller driver:
+ *
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * Author: Padmavathi Venna <padma.v@samsung.com>
+ *
+ * Driver for Audio Subsystem Clock Controller of S5PV210-compatible SoCs.
+*/
+
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/of_address.h>
+#include <linux/syscore_ops.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <dt-bindings/clock/s5pv210-audss.h>
+
+static DEFINE_SPINLOCK(lock);
+static void __iomem *reg_base;
+static struct clk_hw_onecell_data *clk_data;
+
+#define ASS_CLK_SRC 0x0
+#define ASS_CLK_DIV 0x4
+#define ASS_CLK_GATE 0x8
+
+#ifdef CONFIG_PM_SLEEP
+static unsigned long reg_save[][2] = {
+	{ASS_CLK_SRC,  0},
+	{ASS_CLK_DIV,  0},
+	{ASS_CLK_GATE, 0},
+};
+
+static int s5pv210_audss_clk_suspend(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(reg_save); i++)
+		reg_save[i][1] = readl(reg_base + reg_save[i][0]);
+
+	return 0;
+}
+
+static void s5pv210_audss_clk_resume(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(reg_save); i++)
+		writel(reg_save[i][1], reg_base + reg_save[i][0]);
+}
+
+static struct syscore_ops s5pv210_audss_clk_syscore_ops = {
+	.suspend	= s5pv210_audss_clk_suspend,
+	.resume		= s5pv210_audss_clk_resume,
+};
+#endif /* CONFIG_PM_SLEEP */
+
+/* register s5pv210_audss clocks */
+static int s5pv210_audss_clk_probe(struct platform_device *pdev)
+{
+	int i, ret = 0;
+	struct resource *res;
+	const char *mout_audss_p[2];
+	const char *mout_i2s_p[3];
+	const char *hclk_p;
+	struct clk_hw **clk_table;
+	struct clk *hclk, *pll_ref, *pll_in, *cdclk, *sclk_audio;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(reg_base)) {
+		dev_err(&pdev->dev, "failed to map audss registers\n");
+		return PTR_ERR(reg_base);
+	}
+
+	clk_data = devm_kzalloc(&pdev->dev,
+				struct_size(clk_data, hws, AUDSS_MAX_CLKS),
+				GFP_KERNEL);
+
+	if (!clk_data)
+		return -ENOMEM;
+
+	clk_data->num = AUDSS_MAX_CLKS;
+	clk_table = clk_data->hws;
+
+	hclk = devm_clk_get(&pdev->dev, "hclk");
+	if (IS_ERR(hclk)) {
+		dev_err(&pdev->dev, "failed to get hclk clock\n");
+		return PTR_ERR(hclk);
+	}
+
+	pll_in = devm_clk_get(&pdev->dev, "fout_epll");
+	if (IS_ERR(pll_in)) {
+		dev_err(&pdev->dev, "failed to get fout_epll clock\n");
+		return PTR_ERR(pll_in);
+	}
+
+	sclk_audio = devm_clk_get(&pdev->dev, "sclk_audio0");
+	if (IS_ERR(sclk_audio)) {
+		dev_err(&pdev->dev, "failed to get sclk_audio0 clock\n");
+		return PTR_ERR(sclk_audio);
+	}
+
+	/* iiscdclk0 is an optional external I2S codec clock */
+	cdclk = devm_clk_get(&pdev->dev, "iiscdclk0");
+	pll_ref = devm_clk_get(&pdev->dev, "xxti");
+
+	if (!IS_ERR(pll_ref))
+		mout_audss_p[0] = __clk_get_name(pll_ref);
+	else
+		mout_audss_p[0] = "xxti";
+	mout_audss_p[1] = __clk_get_name(pll_in);
+	clk_table[CLK_MOUT_AUDSS] = clk_hw_register_mux(NULL, "mout_audss",
+				mout_audss_p, ARRAY_SIZE(mout_audss_p),
+				CLK_SET_RATE_NO_REPARENT,
+				reg_base + ASS_CLK_SRC, 0, 1, 0, &lock);
+
+	mout_i2s_p[0] = "mout_audss";
+	if (!IS_ERR(cdclk))
+		mout_i2s_p[1] = __clk_get_name(cdclk);
+	else
+		mout_i2s_p[1] = "iiscdclk0";
+	mout_i2s_p[2] = __clk_get_name(sclk_audio);
+	clk_table[CLK_MOUT_I2S_A] = clk_hw_register_mux(NULL, "mout_i2s_audss",
+				mout_i2s_p, ARRAY_SIZE(mout_i2s_p),
+				CLK_SET_RATE_NO_REPARENT,
+				reg_base + ASS_CLK_SRC, 2, 2, 0, &lock);
+
+	clk_table[CLK_DOUT_AUD_BUS] = clk_hw_register_divider(NULL,
+				"dout_aud_bus", "mout_audss", 0,
+				reg_base + ASS_CLK_DIV, 0, 4, 0, &lock);
+	clk_table[CLK_DOUT_I2S_A] = clk_hw_register_divider(NULL,
+				"dout_i2s_audss", "mout_i2s_audss", 0,
+				reg_base + ASS_CLK_DIV, 4, 4, 0, &lock);
+
+	clk_table[CLK_I2S] = clk_hw_register_gate(NULL, "i2s_audss",
+				"dout_i2s_audss", CLK_SET_RATE_PARENT,
+				reg_base + ASS_CLK_GATE, 6, 0, &lock);
+
+	hclk_p = __clk_get_name(hclk);
+
+	clk_table[CLK_HCLK_I2S] = clk_hw_register_gate(NULL, "hclk_i2s_audss",
+				hclk_p, CLK_IGNORE_UNUSED,
+				reg_base + ASS_CLK_GATE, 5, 0, &lock);
+	clk_table[CLK_HCLK_UART] = clk_hw_register_gate(NULL, "hclk_uart_audss",
+				hclk_p, CLK_IGNORE_UNUSED,
+				reg_base + ASS_CLK_GATE, 4, 0, &lock);
+	clk_table[CLK_HCLK_HWA] = clk_hw_register_gate(NULL, "hclk_hwa_audss",
+				hclk_p, CLK_IGNORE_UNUSED,
+				reg_base + ASS_CLK_GATE, 3, 0, &lock);
+	clk_table[CLK_HCLK_DMA] = clk_hw_register_gate(NULL, "hclk_dma_audss",
+				hclk_p, CLK_IGNORE_UNUSED,
+				reg_base + ASS_CLK_GATE, 2, 0, &lock);
+	clk_table[CLK_HCLK_BUF] = clk_hw_register_gate(NULL, "hclk_buf_audss",
+				hclk_p, CLK_IGNORE_UNUSED,
+				reg_base + ASS_CLK_GATE, 1, 0, &lock);
+	clk_table[CLK_HCLK_RP] = clk_hw_register_gate(NULL, "hclk_rp_audss",
+				hclk_p, CLK_IGNORE_UNUSED,
+				reg_base + ASS_CLK_GATE, 0, 0, &lock);
+
+	for (i = 0; i < clk_data->num; i++) {
+		if (IS_ERR(clk_table[i])) {
+			dev_err(&pdev->dev, "failed to register clock %d\n", i);
+			ret = PTR_ERR(clk_table[i]);
+			goto unregister;
+		}
+	}
+
+	ret = of_clk_add_hw_provider(pdev->dev.of_node, of_clk_hw_onecell_get,
+				     clk_data);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add clock provider\n");
+		goto unregister;
+	}
+
+#ifdef CONFIG_PM_SLEEP
+	register_syscore_ops(&s5pv210_audss_clk_syscore_ops);
+#endif
+
+	return 0;
+
+unregister:
+	for (i = 0; i < clk_data->num; i++) {
+		if (!IS_ERR(clk_table[i]))
+			clk_hw_unregister(clk_table[i]);
+	}
+
+	return ret;
+}
+
+static const struct of_device_id s5pv210_audss_clk_of_match[] = {
+	{ .compatible = "samsung,s5pv210-audss-clock", },
+	{},
+};
+
+static struct platform_driver s5pv210_audss_clk_driver = {
+	.driver	= {
+		.name = "s5pv210-audss-clk",
+		.suppress_bind_attrs = true,
+		.of_match_table = s5pv210_audss_clk_of_match,
+	},
+	.probe = s5pv210_audss_clk_probe,
+};
+
+static int __init s5pv210_audss_clk_init(void)
+{
+	return platform_driver_register(&s5pv210_audss_clk_driver);
+}
+core_initcall(s5pv210_audss_clk_init);