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172 lines
4.0 KiB
172 lines
4.0 KiB
/** |
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* OMAP1 Dual-Mode Timers - platform device registration |
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* |
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* Contains first level initialization routines which internally |
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* generates timer device information and registers with linux |
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* device model. It also has a low level function to change the timer |
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* input clock source. |
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* |
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* Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ |
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* Tarun Kanti DebBarma <[email protected]> |
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* Thara Gopinath <[email protected]> |
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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 program is distributed "as is" WITHOUT ANY WARRANTY of any |
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* kind, whether express or implied; without even the implied warranty |
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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*/ |
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#include <linux/clk.h> |
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#include <linux/io.h> |
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#include <linux/err.h> |
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#include <linux/slab.h> |
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#include <linux/platform_device.h> |
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#include <linux/platform_data/dmtimer-omap.h> |
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#include <clocksource/timer-ti-dm.h> |
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#include "soc.h" |
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#define OMAP1610_GPTIMER1_BASE 0xfffb1400 |
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#define OMAP1610_GPTIMER2_BASE 0xfffb1c00 |
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#define OMAP1610_GPTIMER3_BASE 0xfffb2400 |
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#define OMAP1610_GPTIMER4_BASE 0xfffb2c00 |
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#define OMAP1610_GPTIMER5_BASE 0xfffb3400 |
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#define OMAP1610_GPTIMER6_BASE 0xfffb3c00 |
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#define OMAP1610_GPTIMER7_BASE 0xfffb7400 |
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#define OMAP1610_GPTIMER8_BASE 0xfffbd400 |
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#define OMAP1_DM_TIMER_COUNT 8 |
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static int omap1_dm_timer_set_src(struct platform_device *pdev, |
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int source) |
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{ |
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int n = (pdev->id - 1) << 1; |
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u32 l; |
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l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); |
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l |= source << n; |
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omap_writel(l, MOD_CONF_CTRL_1); |
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return 0; |
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} |
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static int __init omap1_dm_timer_init(void) |
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{ |
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int i; |
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int ret; |
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struct dmtimer_platform_data *pdata; |
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struct platform_device *pdev; |
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if (!cpu_is_omap16xx()) |
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return 0; |
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for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { |
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struct resource res[2]; |
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u32 base, irq; |
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switch (i) { |
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case 1: |
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base = OMAP1610_GPTIMER1_BASE; |
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irq = INT_1610_GPTIMER1; |
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break; |
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case 2: |
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base = OMAP1610_GPTIMER2_BASE; |
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irq = INT_1610_GPTIMER2; |
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break; |
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case 3: |
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base = OMAP1610_GPTIMER3_BASE; |
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irq = INT_1610_GPTIMER3; |
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break; |
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case 4: |
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base = OMAP1610_GPTIMER4_BASE; |
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irq = INT_1610_GPTIMER4; |
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break; |
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case 5: |
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base = OMAP1610_GPTIMER5_BASE; |
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irq = INT_1610_GPTIMER5; |
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break; |
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case 6: |
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base = OMAP1610_GPTIMER6_BASE; |
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irq = INT_1610_GPTIMER6; |
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break; |
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case 7: |
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base = OMAP1610_GPTIMER7_BASE; |
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irq = INT_1610_GPTIMER7; |
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break; |
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case 8: |
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base = OMAP1610_GPTIMER8_BASE; |
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irq = INT_1610_GPTIMER8; |
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break; |
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default: |
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/* |
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* not supposed to reach here. |
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* this is to remove warning. |
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*/ |
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return -EINVAL; |
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} |
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pdev = platform_device_alloc("omap_timer", i); |
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if (!pdev) { |
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pr_err("%s: Failed to device alloc for dmtimer%d\n", |
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__func__, i); |
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return -ENOMEM; |
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} |
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memset(res, 0, 2 * sizeof(struct resource)); |
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res[0].start = base; |
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res[0].end = base + 0x46; |
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res[0].flags = IORESOURCE_MEM; |
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res[1].start = irq; |
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res[1].end = irq; |
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res[1].flags = IORESOURCE_IRQ; |
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ret = platform_device_add_resources(pdev, res, |
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ARRAY_SIZE(res)); |
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if (ret) { |
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dev_err(&pdev->dev, "%s: Failed to add resources.\n", |
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__func__); |
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goto err_free_pdev; |
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} |
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pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); |
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if (!pdata) { |
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ret = -ENOMEM; |
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goto err_free_pdata; |
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} |
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pdata->set_timer_src = omap1_dm_timer_set_src; |
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pdata->timer_capability = OMAP_TIMER_ALWON | |
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OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ; |
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ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); |
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if (ret) { |
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dev_err(&pdev->dev, "%s: Failed to add platform data.\n", |
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__func__); |
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goto err_free_pdata; |
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} |
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ret = platform_device_add(pdev); |
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if (ret) { |
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dev_err(&pdev->dev, "%s: Failed to add platform device.\n", |
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__func__); |
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goto err_free_pdata; |
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} |
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dev_dbg(&pdev->dev, " Registered.\n"); |
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} |
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return 0; |
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err_free_pdata: |
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kfree(pdata); |
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err_free_pdev: |
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platform_device_unregister(pdev); |
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return ret; |
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} |
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arch_initcall(omap1_dm_timer_init);
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