diff options
Diffstat (limited to 'drivers/misc/atmel_tclib.c')
| -rw-r--r-- | drivers/misc/atmel_tclib.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/drivers/misc/atmel_tclib.c b/drivers/misc/atmel_tclib.c deleted file mode 100644 index 7de7840f613c..000000000000 --- a/drivers/misc/atmel_tclib.c +++ /dev/null @@ -1,200 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/ioport.h> -#include <linux/kernel.h> -#include <linux/platform_device.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/export.h> -#include <linux/of.h> -#include <soc/at91/atmel_tcb.h> - -/* - * This is a thin library to solve the problem of how to portably allocate - * one of the TC blocks. For simplicity, it doesn't currently expect to - * share individual timers between different drivers. - */ - -#if defined(CONFIG_AVR32) -/* AVR32 has these divide PBB */ -const u8 atmel_tc_divisors[5] = { 0, 4, 8, 16, 32, }; -EXPORT_SYMBOL(atmel_tc_divisors); - -#elif defined(CONFIG_ARCH_AT91) -/* AT91 has these divide MCK */ -const u8 atmel_tc_divisors[5] = { 2, 8, 32, 128, 0, }; -EXPORT_SYMBOL(atmel_tc_divisors); - -#endif - -static DEFINE_SPINLOCK(tc_list_lock); -static LIST_HEAD(tc_list); - -/** - * atmel_tc_alloc - allocate a specified TC block - * @block: which block to allocate - * - * Caller allocates a block. If it is available, a pointer to a - * pre-initialized struct atmel_tc is returned. The caller can access - * the registers directly through the "regs" field. - */ -struct atmel_tc *atmel_tc_alloc(unsigned block) -{ - struct atmel_tc *tc; - struct platform_device *pdev = NULL; - - spin_lock(&tc_list_lock); - list_for_each_entry(tc, &tc_list, node) { - if (tc->allocated) - continue; - - if ((tc->pdev->dev.of_node && tc->id == block) || - (tc->pdev->id == block)) { - pdev = tc->pdev; - tc->allocated = true; - break; - } - } - spin_unlock(&tc_list_lock); - - return pdev ? tc : NULL; -} -EXPORT_SYMBOL_GPL(atmel_tc_alloc); - -/** - * atmel_tc_free - release a specified TC block - * @tc: Timer/counter block that was returned by atmel_tc_alloc() - * - * This reverses the effect of atmel_tc_alloc(), invalidating the resource - * returned by that routine and making the TC available to other drivers. - */ -void atmel_tc_free(struct atmel_tc *tc) -{ - spin_lock(&tc_list_lock); - if (tc->allocated) - tc->allocated = false; - spin_unlock(&tc_list_lock); -} -EXPORT_SYMBOL_GPL(atmel_tc_free); - -#if defined(CONFIG_OF) -static struct atmel_tcb_config tcb_rm9200_config = { - .counter_width = 16, -}; - -static struct atmel_tcb_config tcb_sam9x5_config = { - .counter_width = 32, -}; - -static const struct of_device_id atmel_tcb_dt_ids[] = { - { - .compatible = "atmel,at91rm9200-tcb", - .data = &tcb_rm9200_config, - }, { - .compatible = "atmel,at91sam9x5-tcb", - .data = &tcb_sam9x5_config, - }, { - /* sentinel */ - } -}; - -MODULE_DEVICE_TABLE(of, atmel_tcb_dt_ids); -#endif - -static int __init tc_probe(struct platform_device *pdev) -{ - struct atmel_tc *tc; - struct clk *clk; - int irq; - unsigned int i; - - if (of_get_child_count(pdev->dev.of_node)) - return -EBUSY; - - irq = platform_get_irq(pdev, 0); - if (irq < 0) - return -EINVAL; - - tc = devm_kzalloc(&pdev->dev, sizeof(struct atmel_tc), GFP_KERNEL); - if (!tc) - return -ENOMEM; - - tc->pdev = pdev; - - clk = devm_clk_get(&pdev->dev, "t0_clk"); - if (IS_ERR(clk)) - return PTR_ERR(clk); - - tc->slow_clk = devm_clk_get(&pdev->dev, "slow_clk"); - if (IS_ERR(tc->slow_clk)) - return PTR_ERR(tc->slow_clk); - - tc->regs = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(tc->regs)) - return PTR_ERR(tc->regs); - - /* Now take SoC information if available */ - if (pdev->dev.of_node) { - const struct of_device_id *match; - match = of_match_node(atmel_tcb_dt_ids, pdev->dev.of_node); - if (match) - tc->tcb_config = match->data; - - tc->id = of_alias_get_id(tc->pdev->dev.of_node, "tcb"); - } else { - tc->id = pdev->id; - } - - tc->clk[0] = clk; - tc->clk[1] = devm_clk_get(&pdev->dev, "t1_clk"); - if (IS_ERR(tc->clk[1])) - tc->clk[1] = clk; - tc->clk[2] = devm_clk_get(&pdev->dev, "t2_clk"); - if (IS_ERR(tc->clk[2])) - tc->clk[2] = clk; - - tc->irq[0] = irq; - tc->irq[1] = platform_get_irq(pdev, 1); - if (tc->irq[1] < 0) - tc->irq[1] = irq; - tc->irq[2] = platform_get_irq(pdev, 2); - if (tc->irq[2] < 0) - tc->irq[2] = irq; - - for (i = 0; i < 3; i++) - writel(ATMEL_TC_ALL_IRQ, tc->regs + ATMEL_TC_REG(i, IDR)); - - spin_lock(&tc_list_lock); - list_add_tail(&tc->node, &tc_list); - spin_unlock(&tc_list_lock); - - platform_set_drvdata(pdev, tc); - - return 0; -} - -static void tc_shutdown(struct platform_device *pdev) -{ - int i; - struct atmel_tc *tc = platform_get_drvdata(pdev); - - for (i = 0; i < 3; i++) - writel(ATMEL_TC_ALL_IRQ, tc->regs + ATMEL_TC_REG(i, IDR)); -} - -static struct platform_driver tc_driver = { - .driver = { - .name = "atmel_tcb", - .of_match_table = of_match_ptr(atmel_tcb_dt_ids), - }, - .shutdown = tc_shutdown, -}; - -static int __init tc_init(void) -{ - return platform_driver_probe(&tc_driver, tc_probe); -} -arch_initcall(tc_init); |