mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-01 17:10:11 +00:00
8ec6a04b6b
Switch the driver to using clk_get_rate()/clk_set_rate() instead of
caching the mclk frequency in it's private data. This is required on
the SDHI variant of the controller, where the upstream mclk need to
be adjusted when using UHS modes.
Platforms which do not support clock framework or do not support it
in eg. SPL default to 100 MHz clock.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
---
V2: - Fix build on certain platforms using SPL without clock framework
V3: - Turn clk_get_rate into a callback and fill it as needed on both
renesas and socionext platforms
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Socionext Inc.
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* Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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*/
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#include <common.h>
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#include <clk.h>
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#include <fdtdec.h>
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#include <mmc.h>
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#include <dm.h>
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#include <linux/compat.h>
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#include <linux/dma-direction.h>
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#include <linux/io.h>
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#include <linux/sizes.h>
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#include <power/regulator.h>
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#include <asm/unaligned.h>
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#include "tmio-common.h"
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static const struct dm_mmc_ops uniphier_sd_ops = {
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.send_cmd = tmio_sd_send_cmd,
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.set_ios = tmio_sd_set_ios,
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.get_cd = tmio_sd_get_cd,
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};
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static const struct udevice_id uniphier_sd_match[] = {
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{ .compatible = "socionext,uniphier-sd-v2.91" },
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{ .compatible = "socionext,uniphier-sd-v3.1" },
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{ .compatible = "socionext,uniphier-sd-v3.1.1" },
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{ /* sentinel */ }
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};
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static ulong uniphier_sd_clk_get_rate(struct tmio_sd_priv *priv)
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{
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#if CONFIG_IS_ENABLED(CLK)
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return clk_get_rate(&priv->clk);
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#elif CONFIG_SPL_BUILD
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return 100000000;
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#else
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return 0;
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#endif
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}
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static int uniphier_sd_probe(struct udevice *dev)
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{
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struct tmio_sd_priv *priv = dev_get_priv(dev);
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priv->clk_get_rate = uniphier_sd_clk_get_rate;
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#ifndef CONFIG_SPL_BUILD
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int ret;
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ret = clk_get_by_index(dev, 0, &priv->clk);
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if (ret < 0) {
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dev_err(dev, "failed to get host clock\n");
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return ret;
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}
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/* set to max rate */
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ret = clk_set_rate(&priv->clk, ULONG_MAX);
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if (ret < 0) {
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dev_err(dev, "failed to set rate for host clock\n");
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clk_free(&priv->clk);
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return ret;
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}
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ret = clk_enable(&priv->clk);
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if (ret) {
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dev_err(dev, "failed to enable host clock\n");
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return ret;
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}
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#endif
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return tmio_sd_probe(dev, 0);
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}
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U_BOOT_DRIVER(uniphier_mmc) = {
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.name = "uniphier-mmc",
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.id = UCLASS_MMC,
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.of_match = uniphier_sd_match,
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.bind = tmio_sd_bind,
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.probe = uniphier_sd_probe,
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.priv_auto_alloc_size = sizeof(struct tmio_sd_priv),
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.platdata_auto_alloc_size = sizeof(struct tmio_sd_plat),
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.ops = &uniphier_sd_ops,
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};
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