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path: root/drivers/clk/at91/clk-utmi.c
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Diffstat (limited to 'drivers/clk/at91/clk-utmi.c')
-rw-r--r--drivers/clk/at91/clk-utmi.c142
1 files changed, 0 insertions, 142 deletions
diff --git a/drivers/clk/at91/clk-utmi.c b/drivers/clk/at91/clk-utmi.c
deleted file mode 100644
index 18af0bfeaa..0000000000
--- a/drivers/clk/at91/clk-utmi.c
+++ /dev/null
@@ -1,142 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 Atmel Corporation
- * Wenyou.Yang <wenyou.yang@atmel.com>
- */
-
-#include <common.h>
-#include <clk-uclass.h>
-#include <dm.h>
-#include <syscon.h>
-#include <linux/io.h>
-#include <mach/at91_pmc.h>
-#include <mach/at91_sfr.h>
-#include "pmc.h"
-
-/*
- * The purpose of this clock is to generate a 480 MHz signal. A different
- * rate can't be configured.
- */
-#define UTMI_RATE 480000000
-
-static int utmi_clk_enable(struct clk *clk)
-{
- struct pmc_platdata *plat = dev_get_platdata(clk->dev);
- struct at91_pmc *pmc = plat->reg_base;
- struct clk clk_dev;
- ulong clk_rate;
- u32 utmi_ref_clk_freq;
- u32 tmp;
- int err;
- int timeout = 2000000;
-
- if (readl(&pmc->sr) & AT91_PMC_LOCKU)
- return 0;
-
- /*
- * If mainck rate is different from 12 MHz, we have to configure the
- * FREQ field of the SFR_UTMICKTRIM register to generate properly
- * the utmi clock.
- */
- err = clk_get_by_index(clk->dev, 0, &clk_dev);
- if (err)
- return -EINVAL;
-
- clk_rate = clk_get_rate(&clk_dev);
- switch (clk_rate) {
- case 12000000:
- utmi_ref_clk_freq = 0;
- break;
- case 16000000:
- utmi_ref_clk_freq = 1;
- break;
- case 24000000:
- utmi_ref_clk_freq = 2;
- break;
- /*
- * Not supported on SAMA5D2 but it's not an issue since MAINCK
- * maximum value is 24 MHz.
- */
- case 48000000:
- utmi_ref_clk_freq = 3;
- break;
- default:
- printf("UTMICK: unsupported mainck rate\n");
- return -EINVAL;
- }
-
- if (plat->regmap_sfr) {
- err = regmap_read(plat->regmap_sfr, AT91_SFR_UTMICKTRIM, &tmp);
- if (err)
- return -EINVAL;
-
- tmp &= ~AT91_UTMICKTRIM_FREQ;
- tmp |= utmi_ref_clk_freq;
- err = regmap_write(plat->regmap_sfr, AT91_SFR_UTMICKTRIM, tmp);
- if (err)
- return -EINVAL;
- } else if (utmi_ref_clk_freq) {
- printf("UTMICK: sfr node required\n");
- return -EINVAL;
- }
-
- tmp = readl(&pmc->uckr);
- tmp |= AT91_PMC_UPLLEN |
- AT91_PMC_UPLLCOUNT |
- AT91_PMC_BIASEN;
- writel(tmp, &pmc->uckr);
-
- while ((--timeout) && !(readl(&pmc->sr) & AT91_PMC_LOCKU))
- ;
- if (!timeout) {
- printf("UTMICK: timeout waiting for UPLL lock\n");
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-static ulong utmi_clk_get_rate(struct clk *clk)
-{
- /* UTMI clk rate is fixed. */
- return UTMI_RATE;
-}
-
-static struct clk_ops utmi_clk_ops = {
- .enable = utmi_clk_enable,
- .get_rate = utmi_clk_get_rate,
-};
-
-static int utmi_clk_ofdata_to_platdata(struct udevice *dev)
-{
- struct pmc_platdata *plat = dev_get_platdata(dev);
- struct udevice *syscon;
-
- uclass_get_device_by_phandle(UCLASS_SYSCON, dev,
- "regmap-sfr", &syscon);
-
- if (syscon)
- plat->regmap_sfr = syscon_get_regmap(syscon);
-
- return 0;
-}
-
-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,
- .ofdata_to_platdata = utmi_clk_ofdata_to_platdata,
- .platdata_auto_alloc_size = sizeof(struct pmc_platdata),
- .ops = &utmi_clk_ops,
-};