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crypto: caam - fix LS1021A support on ARMv7 multiplatform kernel

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When built using multi_v7_defconfig, driver does not work on LS1021A:
[...]
caam 1700000.crypto: can't identify CAAM ipg clk: -2
caam: probe of 1700000.crypto failed with error -2
[...]

It turns out we have to detect at runtime whether driver is running
on an i.MX platform or not.

Cc: <stable@vger.kernel.org>
Fixes: 6c3af95593 ("crypto: caam - add support for LS1021A")
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Horia Geantă 2017-09-01 17:12:59 +03:00 • committed by Herbert Xu
parent 3e1166b94e
commit c056d910f0
3 changed files with 39 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

19
drivers/crypto/caam/ctrl.c
View file

@ -7,6 +7,7 @@
#include <linux/device.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/sys_soc.h>
#include "compat.h"
#include "regs.h"
@ -19,6 +20,8 @@ bool caam_little_end;
EXPORT_SYMBOL(caam_little_end);
bool caam_dpaa2;
EXPORT_SYMBOL(caam_dpaa2);
bool caam_imx;
EXPORT_SYMBOL(caam_imx);
#ifdef CONFIG_CAAM_QI
#include "qi.h"
@ -28,19 +31,11 @@ EXPORT_SYMBOL(caam_dpaa2);
* i.MX targets tend to have clock control subsystems that can
* enable/disable clocking to our device.
*/
#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
static inline struct clk *caam_drv_identify_clk(struct device *dev,
char *clk_name)
{
return devm_clk_get(dev, clk_name);
return caam_imx ? devm_clk_get(dev, clk_name) : NULL;
}
#else
static inline struct clk *caam_drv_identify_clk(struct device *dev,
char *clk_name)
{
return NULL;
}
#endif
/*
* Descriptor to instantiate RNG State Handle 0 in normal mode and
@ -430,6 +425,10 @@ static int caam_probe(struct platform_device *pdev)
{
int ret, ring, gen_sk, ent_delay = RTSDCTL_ENT_DLY_MIN;
u64 caam_id;
static const struct soc_device_attribute imx_soc[] = {
{.family = "Freescale i.MX"},
{},
};
struct device *dev;
struct device_node *nprop, *np;
struct caam_ctrl __iomem *ctrl;
@ -451,6 +450,8 @@ static int caam_probe(struct platform_device *pdev)
dev_set_drvdata(dev, ctrlpriv);
nprop = pdev->dev.of_node;
caam_imx = (bool)soc_device_match(imx_soc);
/* Enable clocking */
clk = caam_drv_identify_clk(&pdev->dev, "ipg");
if (IS_ERR(clk)) {