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Commit 70bc2b79 authored by Veerabhadrarao Badiganti's avatar Veerabhadrarao Badiganti
Browse files

mmc: sdhci-msm: Store clock scaling frequencies in a dedicated table 



Use a separate table to store the platform specific clock-scaling
frequencies.

The generic table where these frequencies used to be stored, would
get updated (in some cases) during clock scaling initialization.
But when a new card is inserted (In the case of a removable card),
the frequencies supported by the card should be compared against the
platform specific frequencies.

By storing these values in a separate table, these values would
remain intact and this table can be used for initializing the
generic table during clock-scaling initialization.

Change-Id: I5729f18a975f849bc2965a946473a9cdbd81e94a
Signed-off-by: default avatarVeerabhadrarao Badiganti <vbadigan@codeaurora.org>
parent 28bf2d8b

drivers/mmc/host/sdhci-msm.c

+5 −5
Original line number Original line Diff line number Diff line
@@ -1837,12 +1837,12 @@ struct sdhci_msm_pltfm_data *sdhci_msm_populate_pdata(struct device *dev, 
	}

	}





	if (sdhci_msm_dt_get_array(dev, "qcom,devfreq,freq-table",

	if (sdhci_msm_dt_get_array(dev, "qcom,devfreq,freq-table",

			&msm_host->mmc->clk_scaling.freq_table,

			&msm_host->mmc->clk_scaling.pltfm_freq_table,

			&msm_host->mmc->clk_scaling.freq_table_sz, 0))

			&msm_host->mmc->clk_scaling.pltfm_freq_table_sz, 0))

		pr_debug("%s: no clock scaling frequencies were supplied\n",

		pr_debug("%s: no clock scaling frequencies were supplied\n",

			dev_name(dev));

			dev_name(dev));

	else if (!msm_host->mmc->clk_scaling.freq_table ||

	else if (!msm_host->mmc->clk_scaling.pltfm_freq_table ||

			!msm_host->mmc->clk_scaling.freq_table_sz)

			!msm_host->mmc->clk_scaling.pltfm_freq_table_sz)

		dev_err(dev, "bad dts clock scaling frequencies\n");

		dev_err(dev, "bad dts clock scaling frequencies\n");





	/*

	/*

include/linux/mmc/host.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -330,7 +330,9 @@ struct mmc_devfeq_clk_scaling { 
	atomic_t	devfreq_abort;

	atomic_t	devfreq_abort;

	bool		skip_clk_scale_freq_update;

	bool		skip_clk_scale_freq_update;

	int		freq_table_sz;

	int		freq_table_sz;

	int		pltfm_freq_table_sz;

	u32		*freq_table;

	u32		*freq_table;

	u32		*pltfm_freq_table;

	unsigned long	total_busy_time_us;

	unsigned long	total_busy_time_us;

	unsigned long	target_freq;

	unsigned long	target_freq;

	unsigned long	curr_freq;

	unsigned long	curr_freq;