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Diffstat (limited to 'sound/soc/fsl/imx-audmux.c')
-rw-r--r--sound/soc/fsl/imx-audmux.c186
1 files changed, 94 insertions, 92 deletions
diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c
index fc57da341d61..f8335a04595a 100644
--- a/sound/soc/fsl/imx-audmux.c
+++ b/sound/soc/fsl/imx-audmux.c
@@ -1,21 +1,11 @@
-/*
- * Copyright 2012 Freescale Semiconductor, Inc.
- * Copyright 2012 Linaro Ltd.
- * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
- *
- * Initial development of this code was funded by
- * Phytec Messtechnik GmbH, http://www.phytec.de
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright 2012 Freescale Semiconductor, Inc.
+// Copyright 2012 Linaro Ltd.
+// Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
+//
+// Initial development of this code was funded by
+// Phytec Messtechnik GmbH, https://www.phytec.de
#include <linux/clk.h>
#include <linux/debugfs.h>
@@ -23,7 +13,6 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
-#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -33,6 +22,8 @@
static struct clk *audmux_clk;
static void __iomem *audmux_base;
+static u32 *regcache;
+static u32 reg_max;
#define IMX_AUDMUX_V2_PTCR(x) ((x) * 8)
#define IMX_AUDMUX_V2_PDCR(x) ((x) * 8 + 4)
@@ -70,65 +61,61 @@ static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
uintptr_t port = (uintptr_t)file->private_data;
u32 pdcr, ptcr;
- if (audmux_clk) {
- ret = clk_prepare_enable(audmux_clk);
- if (ret)
- return ret;
- }
+ ret = clk_prepare_enable(audmux_clk);
+ if (ret)
+ return ret;
ptcr = readl(audmux_base + IMX_AUDMUX_V2_PTCR(port));
pdcr = readl(audmux_base + IMX_AUDMUX_V2_PDCR(port));
- if (audmux_clk)
- clk_disable_unprepare(audmux_clk);
+ clk_disable_unprepare(audmux_clk);
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- ret = snprintf(buf, PAGE_SIZE, "PDCR: %08x\nPTCR: %08x\n",
- pdcr, ptcr);
+ ret = sysfs_emit(buf, "PDCR: %08x\nPTCR: %08x\n", pdcr, ptcr);
if (ptcr & IMX_AUDMUX_V2_PTCR_TFSDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"TxFS output from %s, ",
audmux_port_string((ptcr >> 27) & 0x7));
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"TxFS input, ");
if (ptcr & IMX_AUDMUX_V2_PTCR_TCLKDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"TxClk output from %s",
audmux_port_string((ptcr >> 22) & 0x7));
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"TxClk input");
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret, "\n");
if (ptcr & IMX_AUDMUX_V2_PTCR_SYN) {
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"Port is symmetric");
} else {
if (ptcr & IMX_AUDMUX_V2_PTCR_RFSDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"RxFS output from %s, ",
audmux_port_string((ptcr >> 17) & 0x7));
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"RxFS input, ");
if (ptcr & IMX_AUDMUX_V2_PTCR_RCLKDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"RxClk output from %s",
audmux_port_string((ptcr >> 12) & 0x7));
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"RxClk input");
}
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
+ ret += scnprintf(buf + ret, PAGE_SIZE - ret,
"\nData received from %s\n",
audmux_port_string((pdcr >> 13) & 0x7));
@@ -151,17 +138,11 @@ static void audmux_debugfs_init(void)
char buf[20];
audmux_debugfs_root = debugfs_create_dir("audmux", NULL);
- if (!audmux_debugfs_root) {
- pr_warning("Failed to create AUDMUX debugfs root\n");
- return;
- }
for (i = 0; i < MX31_AUDMUX_PORT7_SSI_PINS_7 + 1; i++) {
snprintf(buf, sizeof(buf), "ssi%lu", i);
- if (!debugfs_create_file(buf, 0444, audmux_debugfs_root,
- (void *)i, &audmux_debugfs_fops))
- pr_warning("Failed to create AUDMUX port %lu debugfs file\n",
- i);
+ debugfs_create_file(buf, 0444, audmux_debugfs_root,
+ (void *)i, &audmux_debugfs_fops);
}
}
@@ -184,22 +165,9 @@ static enum imx_audmux_type {
IMX31_AUDMUX,
} audmux_type;
-static const struct platform_device_id imx_audmux_ids[] = {
- {
- .name = "imx21-audmux",
- .driver_data = IMX21_AUDMUX,
- }, {
- .name = "imx31-audmux",
- .driver_data = IMX31_AUDMUX,
- }, {
- /* sentinel */
- }
-};
-MODULE_DEVICE_TABLE(platform, imx_audmux_ids);
-
static const struct of_device_id imx_audmux_dt_ids[] = {
- { .compatible = "fsl,imx21-audmux", .data = &imx_audmux_ids[0], },
- { .compatible = "fsl,imx31-audmux", .data = &imx_audmux_ids[1], },
+ { .compatible = "fsl,imx21-audmux", .data = (void *)IMX21_AUDMUX, },
+ { .compatible = "fsl,imx31-audmux", .data = (void *)IMX31_AUDMUX, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_audmux_dt_ids);
@@ -236,17 +204,14 @@ int imx_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
if (!audmux_base)
return -ENOSYS;
- if (audmux_clk) {
- ret = clk_prepare_enable(audmux_clk);
- if (ret)
- return ret;
- }
+ ret = clk_prepare_enable(audmux_clk);
+ if (ret)
+ return ret;
writel(ptcr, audmux_base + IMX_AUDMUX_V2_PTCR(port));
writel(pdcr, audmux_base + IMX_AUDMUX_V2_PDCR(port));
- if (audmux_clk)
- clk_disable_unprepare(audmux_clk);
+ clk_disable_unprepare(audmux_clk);
return 0;
}
@@ -268,13 +233,13 @@ static int imx_audmux_parse_dt_defaults(struct platform_device *pdev,
ret = of_property_read_u32(child, "fsl,audmux-port", &port);
if (ret) {
- dev_warn(&pdev->dev, "Failed to get fsl,audmux-port of child node \"%s\"\n",
- child->full_name);
+ dev_warn(&pdev->dev, "Failed to get fsl,audmux-port of child node \"%pOF\"\n",
+ child);
continue;
}
- if (!of_property_read_bool(child, "fsl,port-config")) {
- dev_warn(&pdev->dev, "child node \"%s\" does not have property fsl,port-config\n",
- child->full_name);
+ if (!of_property_present(child, "fsl,port-config")) {
+ dev_warn(&pdev->dev, "child node \"%pOF\" does not have property fsl,port-config\n",
+ child);
continue;
}
@@ -292,15 +257,15 @@ static int imx_audmux_parse_dt_defaults(struct platform_device *pdev,
}
if (ret != -EOVERFLOW) {
- dev_err(&pdev->dev, "Failed to read u32 at index %d of child %s\n",
- i, child->full_name);
+ dev_err(&pdev->dev, "Failed to read u32 at index %d of child %pOF\n",
+ i, child);
continue;
}
if (audmux_type == IMX31_AUDMUX) {
if (i % 2) {
- dev_err(&pdev->dev, "One pdcr value is missing in child node %s\n",
- child->full_name);
+ dev_err(&pdev->dev, "One pdcr value is missing in child node %pOF\n",
+ child);
continue;
}
imx_audmux_v2_configure_port(port, ptcr, pdcr);
@@ -314,12 +279,7 @@ static int imx_audmux_parse_dt_defaults(struct platform_device *pdev,
static int imx_audmux_probe(struct platform_device *pdev)
{
- struct resource *res;
- const struct of_device_id *of_id =
- of_match_device(imx_audmux_dt_ids, &pdev->dev);
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- audmux_base = devm_ioremap_resource(&pdev->dev, res);
+ audmux_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(audmux_base))
return PTR_ERR(audmux_base);
@@ -330,32 +290,74 @@ static int imx_audmux_probe(struct platform_device *pdev)
audmux_clk = NULL;
}
- if (of_id)
- pdev->id_entry = of_id->data;
- audmux_type = pdev->id_entry->driver_data;
- if (audmux_type == IMX31_AUDMUX)
+ audmux_type = (uintptr_t)of_device_get_match_data(&pdev->dev);
+
+ switch (audmux_type) {
+ case IMX31_AUDMUX:
audmux_debugfs_init();
+ reg_max = 14;
+ break;
+ case IMX21_AUDMUX:
+ reg_max = 6;
+ break;
+ default:
+ dev_err(&pdev->dev, "unsupported version!\n");
+ return -EINVAL;
+ }
- if (of_id)
- imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node);
+ regcache = devm_kcalloc(&pdev->dev, reg_max, sizeof(u32), GFP_KERNEL);
+ if (!regcache)
+ return -ENOMEM;
+
+ imx_audmux_parse_dt_defaults(pdev, pdev->dev.of_node);
return 0;
}
-static int imx_audmux_remove(struct platform_device *pdev)
+static void imx_audmux_remove(struct platform_device *pdev)
{
if (audmux_type == IMX31_AUDMUX)
audmux_debugfs_remove();
+}
+
+static int imx_audmux_suspend(struct device *dev)
+{
+ int i;
+
+ clk_prepare_enable(audmux_clk);
+
+ for (i = 0; i < reg_max; i++)
+ regcache[i] = readl(audmux_base + i * 4);
+
+ clk_disable_unprepare(audmux_clk);
return 0;
}
+static int imx_audmux_resume(struct device *dev)
+{
+ int i;
+
+ clk_prepare_enable(audmux_clk);
+
+ for (i = 0; i < reg_max; i++)
+ writel(regcache[i], audmux_base + i * 4);
+
+ clk_disable_unprepare(audmux_clk);
+
+ return 0;
+}
+
+static const struct dev_pm_ops imx_audmux_pm = {
+ SYSTEM_SLEEP_PM_OPS(imx_audmux_suspend, imx_audmux_resume)
+};
+
static struct platform_driver imx_audmux_driver = {
.probe = imx_audmux_probe,
.remove = imx_audmux_remove,
- .id_table = imx_audmux_ids,
.driver = {
.name = DRIVER_NAME,
+ .pm = pm_sleep_ptr(&imx_audmux_pm),
.of_match_table = imx_audmux_dt_ids,
}
};
generated by cgit (git 2.34.1) at 2025-12-25 19:36:52 +0000