diff options
Diffstat (limited to 'drivers/crypto/rockchip/rk3288_crypto.c')
| -rw-r--r-- | drivers/crypto/rockchip/rk3288_crypto.c | 75 |
1 files changed, 65 insertions, 10 deletions
diff --git a/drivers/crypto/rockchip/rk3288_crypto.c b/drivers/crypto/rockchip/rk3288_crypto.c index c92559b83f7d..232dc625d6e5 100644 --- a/drivers/crypto/rockchip/rk3288_crypto.c +++ b/drivers/crypto/rockchip/rk3288_crypto.c @@ -14,10 +14,58 @@ #include <linux/module.h> #include <linux/platform_device.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/clk.h> #include <linux/crypto.h> #include <linux/reset.h> +static const struct rk_variant rk3288_variant = { + .num_clks = 4, + .rkclks = { + { "sclk", 150000000}, + } +}; + +static const struct rk_variant rk3328_variant = { + .num_clks = 3, +}; + +static int rk_crypto_get_clks(struct rk_crypto_info *dev) +{ + int i, j, err; + unsigned long cr; + + dev->num_clks = devm_clk_bulk_get_all(dev->dev, &dev->clks); + if (dev->num_clks < dev->variant->num_clks) { + dev_err(dev->dev, "Missing clocks, got %d instead of %d\n", + dev->num_clks, dev->variant->num_clks); + return -EINVAL; + } + + for (i = 0; i < dev->num_clks; i++) { + cr = clk_get_rate(dev->clks[i].clk); + for (j = 0; j < ARRAY_SIZE(dev->variant->rkclks); j++) { + if (dev->variant->rkclks[j].max == 0) + continue; + if (strcmp(dev->variant->rkclks[j].name, dev->clks[i].id)) + continue; + if (cr > dev->variant->rkclks[j].max) { + err = clk_set_rate(dev->clks[i].clk, + dev->variant->rkclks[j].max); + if (err) + dev_err(dev->dev, "Fail downclocking %s from %lu to %lu\n", + dev->variant->rkclks[j].name, cr, + dev->variant->rkclks[j].max); + else + dev_info(dev->dev, "Downclocking %s from %lu to %lu\n", + dev->variant->rkclks[j].name, cr, + dev->variant->rkclks[j].max); + } + } + } + return 0; +} + static int rk_crypto_enable_clk(struct rk_crypto_info *dev) { int err; @@ -201,8 +249,12 @@ static void rk_crypto_unregister(void) } static const struct of_device_id crypto_of_id_table[] = { - { .compatible = "rockchip,rk3288-crypto" }, - { .compatible = "rockchip,rk3328-crypto" }, + { .compatible = "rockchip,rk3288-crypto", + .data = &rk3288_variant, + }, + { .compatible = "rockchip,rk3328-crypto", + .data = &rk3328_variant, + }, {} }; MODULE_DEVICE_TABLE(of, crypto_of_id_table); @@ -220,6 +272,15 @@ static int rk_crypto_probe(struct platform_device *pdev) goto err_crypto; } + crypto_info->dev = &pdev->dev; + platform_set_drvdata(pdev, crypto_info); + + crypto_info->variant = of_device_get_match_data(&pdev->dev); + if (!crypto_info->variant) { + dev_err(&pdev->dev, "Missing variant\n"); + return -EINVAL; + } + crypto_info->rst = devm_reset_control_get(dev, "crypto-rst"); if (IS_ERR(crypto_info->rst)) { err = PTR_ERR(crypto_info->rst); @@ -236,12 +297,9 @@ static int rk_crypto_probe(struct platform_device *pdev) goto err_crypto; } - crypto_info->num_clks = devm_clk_bulk_get_all(&pdev->dev, - &crypto_info->clks); - if (crypto_info->num_clks < 3) { - err = -EINVAL; + err = rk_crypto_get_clks(crypto_info); + if (err) goto err_crypto; - } crypto_info->irq = platform_get_irq(pdev, 0); if (crypto_info->irq < 0) { @@ -259,9 +317,6 @@ static int rk_crypto_probe(struct platform_device *pdev) goto err_crypto; } - crypto_info->dev = &pdev->dev; - platform_set_drvdata(pdev, crypto_info); - crypto_info->engine = crypto_engine_alloc_init(&pdev->dev, true); crypto_engine_start(crypto_info->engine); init_completion(&crypto_info->complete); |