Commit 7b438d03 authored by Mengqi Zhang's avatar Mengqi Zhang Committed by Ulf Hansson
Browse files

mmc: mtk-sd: add Inline Crypto Engine clock control 



Add crypto clock control and ungate it before CQHCI init.

Signed-off-by: default avatarMengqi Zhang <mengqi.zhang@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221106033924.9854-2-mengqi.zhang@mediatek.com


Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 5c133688

drivers/mmc/host/mtk-sd.c

+12 −0
Original line number Diff line number Diff line
@@ -452,6 +452,7 @@ struct msdc_host { 
	struct clk *bus_clk;	/* bus clock which used to access register */

	struct clk *src_clk_cg; /* msdc source clock control gate */

	struct clk *sys_clk_cg;	/* msdc subsys clock control gate */

	struct clk *crypto_clk; /* msdc crypto clock control gate */

	struct clk_bulk_data bulk_clks[MSDC_NR_CLOCKS];

	u32 mclk;		/* mmc subsystem clock frequency */

	u32 src_clk_freq;	/* source clock frequency */
@@ -840,6 +841,7 @@ static void msdc_set_busy_timeout(struct msdc_host *host, u64 ns, u64 clks) 
static void msdc_gate_clock(struct msdc_host *host)

{

	clk_bulk_disable_unprepare(MSDC_NR_CLOCKS, host->bulk_clks);

	clk_disable_unprepare(host->crypto_clk);

	clk_disable_unprepare(host->src_clk_cg);

	clk_disable_unprepare(host->src_clk);

	clk_disable_unprepare(host->bus_clk);
@@ -855,6 +857,7 @@ static int msdc_ungate_clock(struct msdc_host *host) 
	clk_prepare_enable(host->bus_clk);

	clk_prepare_enable(host->src_clk);

	clk_prepare_enable(host->src_clk_cg);

	clk_prepare_enable(host->crypto_clk);

	ret = clk_bulk_prepare_enable(MSDC_NR_CLOCKS, host->bulk_clks);

	if (ret) {

		dev_err(host->dev, "Cannot enable pclk/axi/ahb clock gates\n");
@@ -2670,6 +2673,15 @@ static int msdc_drv_probe(struct platform_device *pdev) 
		goto host_free;

	}



	/* only eMMC has crypto property */

	if (!(mmc->caps2 & MMC_CAP2_NO_MMC)) {

		host->crypto_clk = devm_clk_get_optional(&pdev->dev, "crypto");

		if (IS_ERR(host->crypto_clk))

			host->crypto_clk = NULL;

		else

			mmc->caps2 |= MMC_CAP2_CRYPTO;

	}



	host->irq = platform_get_irq(pdev, 0);

	if (host->irq < 0) {

		ret = -EINVAL;