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authorLinus Torvalds <torvalds@linux-foundation.org>2023-08-29 21:23:29 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-08-29 21:23:29 +0300
commit68cf01760bc0891074e813b9bb06d2696cac1c01 (patch)
tree0bfbd6a995c19df689476782450a7df8bd51b213 /drivers/char/hw_random/ingenic-trng.c
parentf97e18a3f2fb78a4ed0d25e427535d9f853b9e9e (diff)
parent85b9bf9a514d991fcecb118d0a8a35e754ff9265 (diff)
downloadlinux-68cf01760bc0891074e813b9bb06d2696cac1c01.tar.xz
Merge tag 'v6.6-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu: "API: - Move crypto engine callback from tfm ctx into algorithm object - Fix atomic sleep bug in crypto_destroy_instance - Move lib/mpi into lib/crypto Algorithms: - Add chacha20 and poly1305 implementation for powerpc p10 Drivers: - Add AES skcipher and aead support to starfive - Add Dynamic Boost Control support to ccp - Add support for STM32P13 platform to stm32" * tag 'v6.6-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (149 commits) Revert "dt-bindings: crypto: qcom,prng: Add SM8450" crypto: chelsio - Remove unused declarations X.509: if signature is unsupported skip validation crypto: qat - fix crypto capability detection for 4xxx crypto: drivers - Explicitly include correct DT includes crypto: engine - Remove crypto_engine_ctx crypto: zynqmp - Use new crypto_engine_op interface crypto: virtio - Use new crypto_engine_op interface crypto: stm32 - Use new crypto_engine_op interface crypto: jh7110 - Use new crypto_engine_op interface crypto: rk3288 - Use new crypto_engine_op interface crypto: omap - Use new crypto_engine_op interface crypto: keembay - Use new crypto_engine_op interface crypto: sl3516 - Use new crypto_engine_op interface crypto: caam - Use new crypto_engine_op interface crypto: aspeed - Remove non-standard sha512 algorithms crypto: aspeed - Use new crypto_engine_op interface crypto: amlogic - Use new crypto_engine_op interface crypto: sun8i-ss - Use new crypto_engine_op interface crypto: sun8i-ce - Use new crypto_engine_op interface ...
Diffstat (limited to 'drivers/char/hw_random/ingenic-trng.c')
-rw-r--r--drivers/char/hw_random/ingenic-trng.c59
1 files changed, 12 insertions, 47 deletions
diff --git a/drivers/char/hw_random/ingenic-trng.c b/drivers/char/hw_random/ingenic-trng.c
index 0eb80f786f4d..1672320e7d3d 100644
--- a/drivers/char/hw_random/ingenic-trng.c
+++ b/drivers/char/hw_random/ingenic-trng.c
@@ -11,8 +11,8 @@
#include <linux/hw_random.h>
#include <linux/io.h>
#include <linux/iopoll.h>
+#include <linux/mod_devicetable.h>
#include <linux/module.h>
-#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
@@ -22,8 +22,6 @@
#define TRNG_REG_STATUS_OFFSET 0x08
/* bits within the CFG register */
-#define CFG_RDY_CLR BIT(12)
-#define CFG_INT_MASK BIT(11)
#define CFG_GEN_EN BIT(0)
/* bits within the STATUS register */
@@ -31,7 +29,6 @@
struct ingenic_trng {
void __iomem *base;
- struct clk *clk;
struct hwrng rng;
};
@@ -79,6 +76,7 @@ static int ingenic_trng_read(struct hwrng *rng, void *buf, size_t max, bool wait
static int ingenic_trng_probe(struct platform_device *pdev)
{
struct ingenic_trng *trng;
+ struct clk *clk;
int ret;
trng = devm_kzalloc(&pdev->dev, sizeof(*trng), GFP_KERNEL);
@@ -86,60 +84,28 @@ static int ingenic_trng_probe(struct platform_device *pdev)
return -ENOMEM;
trng->base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(trng->base)) {
- pr_err("%s: Failed to map DTRNG registers\n", __func__);
- ret = PTR_ERR(trng->base);
- return PTR_ERR(trng->base);
- }
+ if (IS_ERR(trng->base))
+ return dev_err_probe(&pdev->dev, PTR_ERR(trng->base),
+ "%s: Failed to map DTRNG registers\n", __func__);
- trng->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(trng->clk)) {
- ret = PTR_ERR(trng->clk);
- pr_crit("%s: Cannot get DTRNG clock\n", __func__);
- return PTR_ERR(trng->clk);
- }
-
- ret = clk_prepare_enable(trng->clk);
- if (ret) {
- pr_crit("%s: Unable to enable DTRNG clock\n", __func__);
- return ret;
- }
+ clk = devm_clk_get_enabled(&pdev->dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(&pdev->dev, PTR_ERR(clk),
+ "%s: Cannot get and enable DTRNG clock\n", __func__);
trng->rng.name = pdev->name;
trng->rng.init = ingenic_trng_init;
trng->rng.cleanup = ingenic_trng_cleanup;
trng->rng.read = ingenic_trng_read;
- ret = hwrng_register(&trng->rng);
- if (ret) {
- dev_err(&pdev->dev, "Failed to register hwrng\n");
- goto err_unprepare_clk;
- }
+ ret = devm_hwrng_register(&pdev->dev, &trng->rng);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret, "Failed to register hwrng\n");
platform_set_drvdata(pdev, trng);
dev_info(&pdev->dev, "Ingenic DTRNG driver registered\n");
return 0;
-
-err_unprepare_clk:
- clk_disable_unprepare(trng->clk);
- return ret;
-}
-
-static int ingenic_trng_remove(struct platform_device *pdev)
-{
- struct ingenic_trng *trng = platform_get_drvdata(pdev);
- unsigned int ctrl;
-
- hwrng_unregister(&trng->rng);
-
- ctrl = readl(trng->base + TRNG_REG_CFG_OFFSET);
- ctrl &= ~CFG_GEN_EN;
- writel(ctrl, trng->base + TRNG_REG_CFG_OFFSET);
-
- clk_disable_unprepare(trng->clk);
-
- return 0;
}
static const struct of_device_id ingenic_trng_of_match[] = {
@@ -150,7 +116,6 @@ MODULE_DEVICE_TABLE(of, ingenic_trng_of_match);
static struct platform_driver ingenic_trng_driver = {
.probe = ingenic_trng_probe,
- .remove = ingenic_trng_remove,
.driver = {
.name = "ingenic-trng",
.of_match_table = ingenic_trng_of_match,