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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/clk/sunxi-ng/ccu_mmc_timing.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/clk/sunxi-ng/ccu_mmc_timing.c')
-rw-r--r-- | drivers/clk/sunxi-ng/ccu_mmc_timing.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/clk/sunxi-ng/ccu_mmc_timing.c b/drivers/clk/sunxi-ng/ccu_mmc_timing.c new file mode 100644 index 0000000000..78919d7843 --- /dev/null +++ b/drivers/clk/sunxi-ng/ccu_mmc_timing.c @@ -0,0 +1,63 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2017 Chen-Yu Tsai. All rights reserved. + */ + +#include <linux/clk-provider.h> +#include <linux/clk/sunxi-ng.h> +#include <linux/io.h> + +#include "ccu_common.h" + +/** + * sunxi_ccu_set_mmc_timing_mode - Configure the MMC clock timing mode + * @clk: clock to be configured + * @new_mode: true for new timing mode introduced in A83T and later + * + * Return: %0 on success, %-ENOTSUPP if the clock does not support + * switching modes. + */ +int sunxi_ccu_set_mmc_timing_mode(struct clk *clk, bool new_mode) +{ + struct clk_hw *hw = __clk_get_hw(clk); + struct ccu_common *cm = hw_to_ccu_common(hw); + unsigned long flags; + u32 val; + + if (!(cm->features & CCU_FEATURE_MMC_TIMING_SWITCH)) + return -ENOTSUPP; + + spin_lock_irqsave(cm->lock, flags); + + val = readl(cm->base + cm->reg); + if (new_mode) + val |= CCU_MMC_NEW_TIMING_MODE; + else + val &= ~CCU_MMC_NEW_TIMING_MODE; + writel(val, cm->base + cm->reg); + + spin_unlock_irqrestore(cm->lock, flags); + + return 0; +} +EXPORT_SYMBOL_GPL(sunxi_ccu_set_mmc_timing_mode); + +/** + * sunxi_ccu_get_mmc_timing_mode: Get the current MMC clock timing mode + * @clk: clock to query + * + * Return: %0 if the clock is in old timing mode, > %0 if it is in + * new timing mode, and %-ENOTSUPP if the clock does not support + * this function. + */ +int sunxi_ccu_get_mmc_timing_mode(struct clk *clk) +{ + struct clk_hw *hw = __clk_get_hw(clk); + struct ccu_common *cm = hw_to_ccu_common(hw); + + if (!(cm->features & CCU_FEATURE_MMC_TIMING_SWITCH)) + return -ENOTSUPP; + + return !!(readl(cm->base + cm->reg) & CCU_MMC_NEW_TIMING_MODE); +} +EXPORT_SYMBOL_GPL(sunxi_ccu_get_mmc_timing_mode); |