diff options
| author | Dan Douglass <dan.douglass@freescale.com> | 2016-08-23 22:52:01 -0500 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:24:53 +0800 |
| commit | aa691c2db1ac174a35dbb26554d782b21f7c7b9e (patch) | |
| tree | 0e80311974ddd369d9e9d5b5328877c135c32c3b /drivers/crypto/mxs-dcp.c | |
| parent | 971045dee20327648b38b1f22197218d94016b1f (diff) | |
MLK-13095 DCP driver doesn't initialize the DCP clock
Added clock enable and disable to the probe and remove functions
where appropriate.
Signed-off-by: Dan Douglass <dan.douglass@nxp.com>
Diffstat (limited to 'drivers/crypto/mxs-dcp.c')
| -rw-r--r-- | drivers/crypto/mxs-dcp.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/crypto/mxs-dcp.c b/drivers/crypto/mxs-dcp.c index 4368e9450a8e..821587db9a88 100644 --- a/drivers/crypto/mxs-dcp.c +++ b/drivers/crypto/mxs-dcp.c @@ -20,6 +20,7 @@ #include <linux/of.h> #include <linux/platform_device.h> #include <linux/stmp_device.h> +#include <linux/clk.h> #include <crypto/aes.h> #include <crypto/sha.h> @@ -66,6 +67,9 @@ struct dcp { spinlock_t lock[DCP_MAX_CHANS]; struct task_struct *thread[DCP_MAX_CHANS]; struct crypto_queue queue[DCP_MAX_CHANS]; +#ifdef CONFIG_ARM + struct clk *dcp_clk; +#endif }; enum dcp_chan { @@ -975,6 +979,26 @@ static int mxs_dcp_probe(struct platform_device *pdev) if (IS_ERR(sdcp->base)) return PTR_ERR(sdcp->base); +#ifdef CONFIG_ARM + sdcp->dcp_clk = devm_clk_get(dev, "dcp"); + + if (IS_ERR(sdcp->dcp_clk)) { + ret = PTR_ERR(sdcp->dcp_clk); + dev_err(dev, "can't identify DCP clk: %d\n", ret); + return -ENODEV; + } + + ret = clk_prepare(sdcp->dcp_clk); + if (ret < 0) { + dev_err(&pdev->dev, "can't prepare DCP clock: %d\n", ret); + return -ENODEV; + } + ret = clk_enable(sdcp->dcp_clk); + if (ret < 0) { + dev_err(&pdev->dev, "can't enable DCP clock: %d\n", ret); + return -ENODEV; + } +#endif ret = devm_request_irq(dev, dcp_vmi_irq, mxs_dcp_irq, 0, "dcp-vmi-irq", sdcp); @@ -1116,6 +1140,11 @@ static int mxs_dcp_remove(struct platform_device *pdev) kthread_stop(sdcp->thread[DCP_CHAN_HASH_SHA]); kthread_stop(sdcp->thread[DCP_CHAN_CRYPTO]); +#ifdef CONFIG_ARM + /* shut clocks off before finalizing shutdown */ + clk_disable(sdcp->dcp_clk); +#endif + platform_set_drvdata(pdev, NULL); global_sdcp = NULL; |