diff options
Diffstat (limited to 'arch/arm/plat-mxc')
| -rw-r--r-- | arch/arm/plat-mxc/audmux.c | 127 |
1 files changed, 92 insertions, 35 deletions
diff --git a/arch/arm/plat-mxc/audmux.c b/arch/arm/plat-mxc/audmux.c index b49a39ff99da..a8c9e04771bf 100644 --- a/arch/arm/plat-mxc/audmux.c +++ b/arch/arm/plat-mxc/audmux.c @@ -1,4 +1,6 @@ /* + * 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 @@ -15,14 +17,16 @@ * GNU General Public License for more details. */ -#include <linux/module.h> -#include <linux/err.h> -#include <linux/io.h> #include <linux/clk.h> #include <linux/debugfs.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> #include <linux/slab.h> #include <mach/audmux.h> -#include <mach/hardware.h> + +#define DRIVER_NAME "imx-audmux" static struct clk *audmux_clk; static void __iomem *audmux_base; @@ -140,7 +144,7 @@ static const struct file_operations audmux_debugfs_fops = { .llseek = default_llseek, }; -static void audmux_debugfs_init(void) +static void __init audmux_debugfs_init(void) { int i; char buf[20]; @@ -159,18 +163,48 @@ static void audmux_debugfs_init(void) i); } } + +static void __exit audmux_debugfs_remove(void) +{ + debugfs_remove_recursive(audmux_debugfs_root); +} #else static inline void audmux_debugfs_init(void) { } + +static inline void audmux_debugfs_remove(void) +{ +} #endif +enum imx_audmux_type { + IMX21_AUDMUX, + IMX31_AUDMUX, +} audmux_type; + +static 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 uint8_t port_mapping[] = { 0x0, 0x4, 0x8, 0x10, 0x14, 0x1c, }; int mxc_audmux_v1_configure_port(unsigned int port, unsigned int pcr) { + if (audmux_type != IMX21_AUDMUX) + return -EINVAL; + if (!audmux_base) return -ENOSYS; @@ -186,6 +220,9 @@ EXPORT_SYMBOL_GPL(mxc_audmux_v1_configure_port); int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr, unsigned int pdcr) { + if (audmux_type != IMX31_AUDMUX) + return -EINVAL; + if (!audmux_base) return -ENOSYS; @@ -202,41 +239,61 @@ int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr, } EXPORT_SYMBOL_GPL(mxc_audmux_v2_configure_port); -static int mxc_audmux_init(void) +static int __init imx_audmux_probe(struct platform_device *pdev) { - int ret; - if (cpu_is_mx51()) { - audmux_base = MX51_IO_ADDRESS(MX51_AUDMUX_BASE_ADDR); - } else if (cpu_is_mx31()) { - audmux_base = MX31_IO_ADDRESS(MX31_AUDMUX_BASE_ADDR); - } else if (cpu_is_mx35()) { - audmux_clk = clk_get(NULL, "audmux"); - if (IS_ERR(audmux_clk)) { - ret = PTR_ERR(audmux_clk); - printk(KERN_ERR "%s: cannot get clock: %d\n", __func__, - ret); - return ret; - } - audmux_base = MX35_IO_ADDRESS(MX35_AUDMUX_BASE_ADDR); - } else if (cpu_is_mx25()) { - audmux_clk = clk_get(NULL, "audmux"); - if (IS_ERR(audmux_clk)) { - ret = PTR_ERR(audmux_clk); - printk(KERN_ERR "%s: cannot get clock: %d\n", __func__, - ret); - return ret; - } - audmux_base = MX25_IO_ADDRESS(MX25_AUDMUX_BASE_ADDR); - } else if (cpu_is_mx27()) { - audmux_base = MX27_IO_ADDRESS(MX27_AUDMUX_BASE_ADDR); - } else if (cpu_is_mx21()) { - audmux_base = MX21_IO_ADDRESS(MX21_AUDMUX_BASE_ADDR); + struct resource *res; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + audmux_base = devm_request_and_ioremap(&pdev->dev, res); + if (!audmux_base) + return -EADDRNOTAVAIL; + + audmux_clk = clk_get(&pdev->dev, "audmux"); + if (IS_ERR(audmux_clk)) { + dev_dbg(&pdev->dev, "cannot get clock: %ld\n", + PTR_ERR(audmux_clk)); + audmux_clk = NULL; } - if (!cpu_is_mx2()) + audmux_type = pdev->id_entry->driver_data; + if (audmux_type == IMX31_AUDMUX) audmux_debugfs_init(); return 0; } -postcore_initcall(mxc_audmux_init); +static int __exit imx_audmux_remove(struct platform_device *pdev) +{ + if (audmux_type == IMX31_AUDMUX) + audmux_debugfs_remove(); + clk_put(audmux_clk); + + return 0; +} + +static struct platform_driver imx_audmux_driver = { + .probe = imx_audmux_probe, + .remove = __exit_p(imx_audmux_remove), + .id_table = imx_audmux_ids, + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + } +}; + +static int __init imx_audmux_init(void) +{ + return platform_driver_register(&imx_audmux_driver); +} +subsys_initcall(imx_audmux_init); + +static void __exit imx_audmux_exit(void) +{ + platform_driver_unregister(&imx_audmux_driver); +} +module_exit(imx_audmux_exit); + +MODULE_DESCRIPTION("Freescale i.MX AUDMUX driver"); +MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); |