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author | Tom Rini <trini@konsulko.com> | 2016-08-15 17:31:23 -0400 |
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committer | Tom Rini <trini@konsulko.com> | 2016-08-15 17:31:23 -0400 |
commit | 0fcb9f07a1d086fc6951c08d2fc1cf6048bd54e2 (patch) | |
tree | aa56e05011e5b79a0d940a335558918b36e97a90 /drivers/clk/at91/clk-utmi.c | |
parent | 2ef98d33166e5c22a61eba29c20e236b72f1e8a2 (diff) | |
parent | a0d0d86f5cfeefda87986f3825ed1a85efa24448 (diff) | |
download | u-boot-imx-0fcb9f07a1d086fc6951c08d2fc1cf6048bd54e2.zip u-boot-imx-0fcb9f07a1d086fc6951c08d2fc1cf6048bd54e2.tar.gz u-boot-imx-0fcb9f07a1d086fc6951c08d2fc1cf6048bd54e2.tar.bz2 |
Merge branch 'master' of git://git.denx.de/u-boot-atmel
Diffstat (limited to 'drivers/clk/at91/clk-utmi.c')
-rw-r--r-- | drivers/clk/at91/clk-utmi.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c new file mode 100644 index 0000000..369a687 --- /dev/null +++ b/drivers/clk/at91/clk-utmi.c @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2016 Atmel Corporation + * Wenyou.Yang <wenyou.yang@atmel.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <clk-uclass.h> +#include <dm/device.h> +#include <linux/io.h> +#include <mach/at91_pmc.h> +#include "pmc.h" + +DECLARE_GLOBAL_DATA_PTR; + +#define UTMI_FIXED_MUL 40 + +static int utmi_clk_enable(struct clk *clk) +{ + struct pmc_platdata *plat = dev_get_platdata(clk->dev); + struct at91_pmc *pmc = plat->reg_base; + u32 tmp; + + if (readl(&pmc->sr) & AT91_PMC_LOCKU) + return 0; + + tmp = readl(&pmc->uckr); + tmp |= AT91_PMC_UPLLEN | + AT91_PMC_UPLLCOUNT | + AT91_PMC_BIASEN; + writel(tmp, &pmc->uckr); + + while (!(readl(&pmc->sr) & AT91_PMC_LOCKU)) + ; + + return 0; +} + +static ulong utmi_clk_get_rate(struct clk *clk) +{ + return gd->arch.main_clk_rate_hz * UTMI_FIXED_MUL; +} + +static struct clk_ops utmi_clk_ops = { + .enable = utmi_clk_enable, + .get_rate = utmi_clk_get_rate, +}; + +static int utmi_clk_probe(struct udevice *dev) +{ + return at91_pmc_core_probe(dev); +} + +static const struct udevice_id utmi_clk_match[] = { + { .compatible = "atmel,at91sam9x5-clk-utmi" }, + {} +}; + +U_BOOT_DRIVER(at91sam9x5_utmi_clk) = { + .name = "at91sam9x5-utmi-clk", + .id = UCLASS_CLK, + .of_match = utmi_clk_match, + .probe = utmi_clk_probe, + .platdata_auto_alloc_size = sizeof(struct pmc_platdata), + .ops = &utmi_clk_ops, +}; |