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- From 7b438d0377fbd520b475a68bdd9de1692393f22d Mon Sep 17 00:00:00 2001
- From: Mengqi Zhang <[email protected]>
- Date: Sun, 6 Nov 2022 11:39:24 +0800
- Subject: [PATCH 2/6] mmc: mtk-sd: add Inline Crypto Engine clock control
- Add crypto clock control and ungate it before CQHCI init.
- Signed-off-by: Mengqi Zhang <[email protected]>
- Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
- Link: https://lore.kernel.org/r/[email protected]
- Signed-off-by: Ulf Hansson <[email protected]>
- ---
- drivers/mmc/host/mtk-sd.c | 12 ++++++++++++
- 1 file changed, 12 insertions(+)
- --- a/drivers/mmc/host/mtk-sd.c
- +++ b/drivers/mmc/host/mtk-sd.c
- @@ -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
- 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
- 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 platfor
- 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 = host->irq;
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