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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 | /** * OMAP1 Dual-Mode Timers - platform device registration * * Contains first level initialization routines which internally * generates timer device information and registers with linux * device model. It also has low level function to chnage the timer * input clock source. * * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/ * Tarun Kanti DebBarma <tarun.kanti@ti.com> * Thara Gopinath <thara@ti.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any * kind, whether express or implied; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/clk.h> #include <linux/io.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/platform_data/dmtimer-omap.h> #include <mach/irqs.h> #include <plat/dmtimer.h> #define OMAP1610_GPTIMER1_BASE 0xfffb1400 #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 #define OMAP1610_GPTIMER3_BASE 0xfffb2400 #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 #define OMAP1610_GPTIMER5_BASE 0xfffb3400 #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 #define OMAP1610_GPTIMER7_BASE 0xfffb7400 #define OMAP1610_GPTIMER8_BASE 0xfffbd400 #define OMAP1_DM_TIMER_COUNT 8 static int omap1_dm_timer_set_src(struct platform_device *pdev, int source) { int n = (pdev->id - 1) << 1; u32 l; l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); l |= source << n; omap_writel(l, MOD_CONF_CTRL_1); return 0; } static int __init omap1_dm_timer_init(void) { int i; int ret; struct dmtimer_platform_data *pdata; struct platform_device *pdev; if (!cpu_is_omap16xx()) return 0; for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { struct resource res[2]; u32 base, irq; switch (i) { case 1: base = OMAP1610_GPTIMER1_BASE; irq = INT_1610_GPTIMER1; break; case 2: base = OMAP1610_GPTIMER2_BASE; irq = INT_1610_GPTIMER2; break; case 3: base = OMAP1610_GPTIMER3_BASE; irq = INT_1610_GPTIMER3; break; case 4: base = OMAP1610_GPTIMER4_BASE; irq = INT_1610_GPTIMER4; break; case 5: base = OMAP1610_GPTIMER5_BASE; irq = INT_1610_GPTIMER5; break; case 6: base = OMAP1610_GPTIMER6_BASE; irq = INT_1610_GPTIMER6; break; case 7: base = OMAP1610_GPTIMER7_BASE; irq = INT_1610_GPTIMER7; break; case 8: base = OMAP1610_GPTIMER8_BASE; irq = INT_1610_GPTIMER8; break; default: /* * not supposed to reach here. * this is to remove warning. */ return -EINVAL; } pdev = platform_device_alloc("omap_timer", i); if (!pdev) { pr_err("%s: Failed to device alloc for dmtimer%d\n", __func__, i); return -ENOMEM; } memset(res, 0, 2 * sizeof(struct resource)); res[0].start = base; res[0].end = base + 0x46; res[0].flags = IORESOURCE_MEM; res[1].start = irq; res[1].end = irq; res[1].flags = IORESOURCE_IRQ; ret = platform_device_add_resources(pdev, res, ARRAY_SIZE(res)); if (ret) { dev_err(&pdev->dev, "%s: Failed to add resources.\n", __func__); goto err_free_pdev; } pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&pdev->dev, "%s: Failed to allocate pdata.\n", __func__); ret = -ENOMEM; goto err_free_pdata; } pdata->set_timer_src = omap1_dm_timer_set_src; pdata->timer_capability = OMAP_TIMER_ALWON | OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ; ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); if (ret) { dev_err(&pdev->dev, "%s: Failed to add platform data.\n", __func__); goto err_free_pdata; } ret = platform_device_add(pdev); if (ret) { dev_err(&pdev->dev, "%s: Failed to add platform device.\n", __func__); goto err_free_pdata; } dev_dbg(&pdev->dev, " Registered.\n"); } return 0; err_free_pdata: kfree(pdata); err_free_pdev: platform_device_unregister(pdev); return ret; } arch_initcall(omap1_dm_timer_init); |