1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * OMAP1 Dual-Mode Timers - platform device registration 4 * 5 * Contains first level initialization routines which internally 6 * generates timer device information and registers with linux 7 * device model. It also has a low level function to change the timer 8 * input clock source. 9 * 10 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/ 11 * Tarun Kanti DebBarma <tarun.kanti@ti.com> 12 * Thara Gopinath <thara@ti.com> 13 */ 14 15 #include <linux/clk.h> 16 #include <linux/io.h> 17 #include <linux/err.h> 18 #include <linux/slab.h> 19 #include <linux/platform_device.h> 20 #include <linux/platform_data/dmtimer-omap.h> 21 #include <linux/soc/ti/omap1-io.h> 22 23 #include <clocksource/timer-ti-dm.h> 24 25 #include "soc.h" 26 27 #define OMAP1610_GPTIMER1_BASE 0xfffb1400 28 #define OMAP1610_GPTIMER2_BASE 0xfffb1c00 29 #define OMAP1610_GPTIMER3_BASE 0xfffb2400 30 #define OMAP1610_GPTIMER4_BASE 0xfffb2c00 31 #define OMAP1610_GPTIMER5_BASE 0xfffb3400 32 #define OMAP1610_GPTIMER6_BASE 0xfffb3c00 33 #define OMAP1610_GPTIMER7_BASE 0xfffb7400 34 #define OMAP1610_GPTIMER8_BASE 0xfffbd400 35 36 #define OMAP1_DM_TIMER_COUNT 8 37 38 static int omap1_dm_timer_set_src(struct platform_device *pdev, 39 int source) 40 { 41 int n = (pdev->id - 1) << 1; 42 u32 l; 43 44 l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n); 45 l |= source << n; 46 omap_writel(l, MOD_CONF_CTRL_1); 47 48 return 0; 49 } 50 51 static int __init omap1_dm_timer_init(void) 52 { 53 int i; 54 int ret; 55 struct dmtimer_platform_data *pdata; 56 struct platform_device *pdev; 57 58 if (!cpu_is_omap16xx()) 59 return 0; 60 61 for (i = 1; i <= OMAP1_DM_TIMER_COUNT; i++) { 62 struct resource res[2]; 63 u32 base, irq; 64 65 switch (i) { 66 case 1: 67 base = OMAP1610_GPTIMER1_BASE; 68 irq = INT_1610_GPTIMER1; 69 break; 70 case 2: 71 base = OMAP1610_GPTIMER2_BASE; 72 irq = INT_1610_GPTIMER2; 73 break; 74 case 3: 75 base = OMAP1610_GPTIMER3_BASE; 76 irq = INT_1610_GPTIMER3; 77 break; 78 case 4: 79 base = OMAP1610_GPTIMER4_BASE; 80 irq = INT_1610_GPTIMER4; 81 break; 82 case 5: 83 base = OMAP1610_GPTIMER5_BASE; 84 irq = INT_1610_GPTIMER5; 85 break; 86 case 6: 87 base = OMAP1610_GPTIMER6_BASE; 88 irq = INT_1610_GPTIMER6; 89 break; 90 case 7: 91 base = OMAP1610_GPTIMER7_BASE; 92 irq = INT_1610_GPTIMER7; 93 break; 94 case 8: 95 base = OMAP1610_GPTIMER8_BASE; 96 irq = INT_1610_GPTIMER8; 97 break; 98 default: 99 /* 100 * not supposed to reach here. 101 * this is to remove warning. 102 */ 103 return -EINVAL; 104 } 105 106 pdev = platform_device_alloc("omap_timer", i); 107 if (!pdev) { 108 pr_err("%s: Failed to device alloc for dmtimer%d\n", 109 __func__, i); 110 return -ENOMEM; 111 } 112 113 memset(res, 0, 2 * sizeof(struct resource)); 114 res[0].start = base; 115 res[0].end = base + 0x46; 116 res[0].flags = IORESOURCE_MEM; 117 res[1].start = irq; 118 res[1].end = irq; 119 res[1].flags = IORESOURCE_IRQ; 120 ret = platform_device_add_resources(pdev, res, 121 ARRAY_SIZE(res)); 122 if (ret) { 123 dev_err(&pdev->dev, "%s: Failed to add resources.\n", 124 __func__); 125 goto err_free_pdev; 126 } 127 128 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL); 129 if (!pdata) { 130 ret = -ENOMEM; 131 goto err_free_pdata; 132 } 133 134 pdata->set_timer_src = omap1_dm_timer_set_src; 135 pdata->timer_capability = OMAP_TIMER_ALWON | 136 OMAP_TIMER_NEEDS_RESET | OMAP_TIMER_HAS_DSP_IRQ; 137 138 ret = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 139 if (ret) { 140 dev_err(&pdev->dev, "%s: Failed to add platform data.\n", 141 __func__); 142 goto err_free_pdata; 143 } 144 145 ret = platform_device_add(pdev); 146 if (ret) { 147 dev_err(&pdev->dev, "%s: Failed to add platform device.\n", 148 __func__); 149 goto err_free_pdata; 150 } 151 152 dev_dbg(&pdev->dev, " Registered.\n"); 153 } 154 155 return 0; 156 157 err_free_pdata: 158 kfree(pdata); 159 160 err_free_pdev: 161 platform_device_unregister(pdev); 162 163 return ret; 164 } 165 arch_initcall(omap1_dm_timer_init); 166