f0e46cc497
The Toshiba parts all have a 24 MHz HCLK, but HTC ASIC3 has a 24.576 MHz HCLK and AMD Imageon w228x's HCLK is 80 MHz. With this patch, the MFD driver provides the HCLK frequency to tmio_mmc via mfd_cell->driver_data. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Ian Molton <ian@mnementh.co.uk> Acked-by: Samuel Ortiz <sameo@openedhand.com> Signed-off-by: Pierre Ossman <pierre@ossman.eu>
197 lines
4.2 KiB
C
197 lines
4.2 KiB
C
/*
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* Toshiba TC6387XB support
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* Copyright (c) 2005 Ian Molton
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This file contains TC6387XB base support.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/tmio.h>
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#include <linux/mfd/tc6387xb.h>
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enum {
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TC6387XB_CELL_MMC,
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};
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#ifdef CONFIG_PM
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static int tc6387xb_suspend(struct platform_device *dev, pm_message_t state)
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{
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struct clk *clk32k = platform_get_drvdata(dev);
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struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
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if (pdata && pdata->suspend)
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pdata->suspend(dev);
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clk_disable(clk32k);
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return 0;
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}
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static int tc6387xb_resume(struct platform_device *dev)
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{
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struct clk *clk32k = platform_get_drvdata(dev);
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struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
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clk_enable(clk32k);
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if (pdata && pdata->resume)
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pdata->resume(dev);
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return 0;
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}
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#else
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#define tc6387xb_suspend NULL
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#define tc6387xb_resume NULL
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#endif
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/*--------------------------------------------------------------------------*/
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static int tc6387xb_mmc_enable(struct platform_device *mmc)
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{
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struct platform_device *dev = to_platform_device(mmc->dev.parent);
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struct clk *clk32k = platform_get_drvdata(dev);
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clk_enable(clk32k);
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return 0;
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}
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static int tc6387xb_mmc_disable(struct platform_device *mmc)
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{
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struct platform_device *dev = to_platform_device(mmc->dev.parent);
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struct clk *clk32k = platform_get_drvdata(dev);
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clk_disable(clk32k);
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return 0;
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}
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/*--------------------------------------------------------------------------*/
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const static struct tmio_mmc_data tc6387xb_mmc_data = {
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.hclk = 24000000,
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};
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static struct resource tc6387xb_mmc_resources[] = {
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{
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.start = 0x800,
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.end = 0x9ff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0x200,
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.end = 0x2ff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_IRQ,
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},
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};
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static struct mfd_cell tc6387xb_cells[] = {
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[TC6387XB_CELL_MMC] = {
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.name = "tmio-mmc",
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.enable = tc6387xb_mmc_enable,
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.disable = tc6387xb_mmc_disable,
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.driver_data = &tc6387xb_mmc_data,
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.num_resources = ARRAY_SIZE(tc6387xb_mmc_resources),
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.resources = tc6387xb_mmc_resources,
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},
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};
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static int tc6387xb_probe(struct platform_device *dev)
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{
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struct tc6387xb_platform_data *pdata = dev->dev.platform_data;
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struct resource *iomem;
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struct clk *clk32k;
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int irq, ret;
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iomem = platform_get_resource(dev, IORESOURCE_MEM, 0);
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if (!iomem) {
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return -EINVAL;
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}
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ret = platform_get_irq(dev, 0);
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if (ret >= 0)
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irq = ret;
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else
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goto err_resource;
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clk32k = clk_get(&dev->dev, "CLK_CK32K");
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if (IS_ERR(clk32k)) {
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ret = PTR_ERR(clk32k);
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goto err_resource;
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}
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platform_set_drvdata(dev, clk32k);
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if (pdata && pdata->enable)
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pdata->enable(dev);
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printk(KERN_INFO "Toshiba tc6387xb initialised\n");
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tc6387xb_cells[TC6387XB_CELL_MMC].platform_data =
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&tc6387xb_cells[TC6387XB_CELL_MMC];
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tc6387xb_cells[TC6387XB_CELL_MMC].data_size =
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sizeof(tc6387xb_cells[TC6387XB_CELL_MMC]);
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ret = mfd_add_devices(&dev->dev, dev->id, tc6387xb_cells,
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ARRAY_SIZE(tc6387xb_cells), iomem, irq);
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if (!ret)
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return 0;
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clk_put(clk32k);
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err_resource:
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return ret;
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}
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static int tc6387xb_remove(struct platform_device *dev)
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{
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struct clk *clk32k = platform_get_drvdata(dev);
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mfd_remove_devices(&dev->dev);
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clk_disable(clk32k);
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clk_put(clk32k);
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platform_set_drvdata(dev, NULL);
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return 0;
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}
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static struct platform_driver tc6387xb_platform_driver = {
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.driver = {
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.name = "tc6387xb",
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},
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.probe = tc6387xb_probe,
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.remove = tc6387xb_remove,
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.suspend = tc6387xb_suspend,
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.resume = tc6387xb_resume,
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};
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static int __init tc6387xb_init(void)
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{
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return platform_driver_register(&tc6387xb_platform_driver);
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}
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static void __exit tc6387xb_exit(void)
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{
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platform_driver_unregister(&tc6387xb_platform_driver);
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}
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module_init(tc6387xb_init);
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module_exit(tc6387xb_exit);
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MODULE_DESCRIPTION("Toshiba TC6387XB core driver");
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Ian Molton");
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MODULE_ALIAS("platform:tc6387xb");
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