projects / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 4d0732bf MV |
1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* | |
| 3 | * Renesas RZ/A1 R7S72100 OSTM Timer driver | |
| 4 | * | |
| 5 | * Copyright (C) 2019 Marek Vasut <[email protected]> | |
| 6 | */ | |
| 7 | ||
| 8 | #include <common.h> | |
| 336d4615 | 9 | #include <malloc.h> |
| 4d0732bf MV |
10 | #include <asm/io.h> |
| 11 | #include <dm.h> | |
| 12 | #include <clk.h> | |
| 13 | #include <timer.h> | |
| cd93d625 | 14 | #include <linux/bitops.h> |
| 4d0732bf MV |
15 | |
| 16 | #define OSTM_CMP 0x00 | |
| 17 | #define OSTM_CNT 0x04 | |
| 18 | #define OSTM_TE 0x10 | |
| 19 | #define OSTM_TS 0x14 | |
| 20 | #define OSTM_TT 0x18 | |
| 21 | #define OSTM_CTL 0x20 | |
| 22 | #define OSTM_CTL_D BIT(1) | |
| 23 | ||
| 24 | DECLARE_GLOBAL_DATA_PTR; | |
| 25 | ||
| 26 | struct ostm_priv { | |
| 27 | fdt_addr_t regs; | |
| 28 | }; | |
| 29 | ||
| 8af7bb91 | 30 | static u64 ostm_get_count(struct udevice *dev) |
| 4d0732bf MV |
31 | { |
| 32 | struct ostm_priv *priv = dev_get_priv(dev); | |
| 33 | ||
| 8af7bb91 | 34 | return timer_conv_64(readl(priv->regs + OSTM_CNT)); |
| 4d0732bf MV |
35 | } |
| 36 | ||
| 37 | static int ostm_probe(struct udevice *dev) | |
| 38 | { | |
| 39 | struct timer_dev_priv *uc_priv = dev_get_uclass_priv(dev); | |
| 40 | struct ostm_priv *priv = dev_get_priv(dev); | |
| 41 | #if CONFIG_IS_ENABLED(CLK) | |
| 42 | struct clk clk; | |
| 43 | int ret; | |
| 44 | ||
| 45 | ret = clk_get_by_index(dev, 0, &clk); | |
| 46 | if (ret) | |
| 47 | return ret; | |
| 48 | ||
| 49 | uc_priv->clock_rate = clk_get_rate(&clk); | |
| 50 | ||
| 51 | clk_free(&clk); | |
| 52 | #else | |
| 53 | uc_priv->clock_rate = CONFIG_SYS_CLK_FREQ / 2; | |
| 54 | #endif | |
| 55 | ||
| 56 | readb(priv->regs + OSTM_CTL); | |
| 57 | writeb(OSTM_CTL_D, priv->regs + OSTM_CTL); | |
| 58 | ||
| 59 | setbits_8(priv->regs + OSTM_TT, BIT(0)); | |
| 60 | writel(0xffffffff, priv->regs + OSTM_CMP); | |
| 61 | setbits_8(priv->regs + OSTM_TS, BIT(0)); | |
| 62 | ||
| 63 | return 0; | |
| 64 | } | |
| 65 | ||
| 66 | static int ostm_ofdata_to_platdata(struct udevice *dev) | |
| 67 | { | |
| 68 | struct ostm_priv *priv = dev_get_priv(dev); | |
| 69 | ||
| 70 | priv->regs = dev_read_addr(dev); | |
| 71 | ||
| 72 | return 0; | |
| 73 | } | |
| 74 | ||
| 75 | static const struct timer_ops ostm_ops = { | |
| 76 | .get_count = ostm_get_count, | |
| 77 | }; | |
| 78 | ||
| 79 | static const struct udevice_id ostm_ids[] = { | |
| 80 | { .compatible = "renesas,ostm" }, | |
| 81 | {} | |
| 82 | }; | |
| 83 | ||
| 84 | U_BOOT_DRIVER(ostm_timer) = { | |
| 85 | .name = "ostm-timer", | |
| 86 | .id = UCLASS_TIMER, | |
| 87 | .ops = &ostm_ops, | |
| 88 | .probe = ostm_probe, | |
| 89 | .of_match = ostm_ids, | |
| 90 | .ofdata_to_platdata = ostm_ofdata_to_platdata, | |
| 41575d8e | 91 | .priv_auto = sizeof(struct ostm_priv), |
| 4d0732bf | 92 | }; |