crypto: caam - fix LS1021A support on ARMv7 multiplatform kernel

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: 6c3af9559352 ("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>

3 files changed, 39 insertions, 44 deletions

diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig
index e36aeacd7635..1eb852765469 100644
--- a/drivers/crypto/caam/Kconfig
+++ b/drivers/crypto/caam/Kconfig
@@ -1,6 +1,7 @@
 config CRYPTO_DEV_FSL_CAAM
         tristate "Freescale CAAM-Multicore driver backend"
         depends on FSL_SOC || ARCH_MXC || ARCH_LAYERSCAPE
+        select SOC_BUS
         help
           Enables the driver module for Freescale's Cryptographic Accelerator
           and Assurance Module (CAAM), also known as the SEC version 4 (SEC4).
@@ -141,10 +142,6 @@ config CRYPTO_DEV_FSL_CAAM_RNG_API
           To compile this as a module, choose M here: the module
           will be called caamrng.
 
-config CRYPTO_DEV_FSL_CAAM_IMX
-        def_bool SOC_IMX6 || SOC_IMX7D
-        depends on CRYPTO_DEV_FSL_CAAM
-
 config CRYPTO_DEV_FSL_CAAM_DEBUG
         bool "Enable debug output in CAAM driver"
         depends on CRYPTO_DEV_FSL_CAAM
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index dacb53fb690e..027e121c6f70 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -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)) {
diff --git a/drivers/crypto/caam/regs.h b/drivers/crypto/caam/regs.h
index 2b5efff9ec3c..17cfd23a38fa 100644
--- a/drivers/crypto/caam/regs.h
+++ b/drivers/crypto/caam/regs.h
@@ -67,6 +67,7 @@
  */
 
 extern bool caam_little_end;
+extern bool caam_imx;
 
 #define caam_to_cpu(len)                                \
 static inline u##len caam##len ## _to_cpu(u##len val)   \
@@ -154,13 +155,10 @@ static inline u64 rd_reg64(void __iomem *reg)
 #else /* CONFIG_64BIT */
 static inline void wr_reg64(void __iomem *reg, u64 data)
 {
-#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
-        if (caam_little_end) {
+        if (!caam_imx && caam_little_end) {
                 wr_reg32((u32 __iomem *)(reg) + 1, data >> 32);
                 wr_reg32((u32 __iomem *)(reg), data);
-        } else
-#endif
-        {
+        } else {
                 wr_reg32((u32 __iomem *)(reg), data >> 32);
                 wr_reg32((u32 __iomem *)(reg) + 1, data);
         }
@@ -168,41 +166,40 @@ static inline void wr_reg64(void __iomem *reg, u64 data)
 
 static inline u64 rd_reg64(void __iomem *reg)
 {
-#ifndef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
-        if (caam_little_end)
+        if (!caam_imx && caam_little_end)
                 return ((u64)rd_reg32((u32 __iomem *)(reg) + 1) << 32 |
                         (u64)rd_reg32((u32 __iomem *)(reg)));
-        else
-#endif
-                return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
-                        (u64)rd_reg32((u32 __iomem *)(reg) + 1));
+
+        return ((u64)rd_reg32((u32 __iomem *)(reg)) << 32 |
+                (u64)rd_reg32((u32 __iomem *)(reg) + 1));
 }
 #endif /* CONFIG_64BIT  */
 
+static inline u64 cpu_to_caam_dma64(dma_addr_t value)
+{
+        if (caam_imx)
+                return (((u64)cpu_to_caam32(lower_32_bits(value)) << 32) |
+                         (u64)cpu_to_caam32(upper_32_bits(value)));
+
+        return cpu_to_caam64(value);
+}
+
+static inline u64 caam_dma64_to_cpu(u64 value)
+{
+        if (caam_imx)
+                return (((u64)caam32_to_cpu(lower_32_bits(value)) << 32) |
+                         (u64)caam32_to_cpu(upper_32_bits(value)));
+
+        return caam64_to_cpu(value);
+}
+
 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
-#ifdef CONFIG_SOC_IMX7D
-#define cpu_to_caam_dma(value) \
-                (((u64)cpu_to_caam32(lower_32_bits(value)) << 32) | \
-                  (u64)cpu_to_caam32(upper_32_bits(value)))
-#define caam_dma_to_cpu(value) \
-                (((u64)caam32_to_cpu(lower_32_bits(value)) << 32) | \
-                  (u64)caam32_to_cpu(upper_32_bits(value)))
-#else
-#define cpu_to_caam_dma(value) cpu_to_caam64(value)
-#define caam_dma_to_cpu(value) caam64_to_cpu(value)
-#endif /* CONFIG_SOC_IMX7D */
+#define cpu_to_caam_dma(value) cpu_to_caam_dma64(value)
+#define caam_dma_to_cpu(value) caam_dma64_to_cpu(value)
 #else
 #define cpu_to_caam_dma(value) cpu_to_caam32(value)
 #define caam_dma_to_cpu(value) caam32_to_cpu(value)
-#endif /* CONFIG_ARCH_DMA_ADDR_T_64BIT  */
-
-#ifdef CONFIG_CRYPTO_DEV_FSL_CAAM_IMX
-#define cpu_to_caam_dma64(value) \
-                (((u64)cpu_to_caam32(lower_32_bits(value)) << 32) | \
-                 (u64)cpu_to_caam32(upper_32_bits(value)))
-#else
-#define cpu_to_caam_dma64(value) cpu_to_caam64(value)
-#endif
+#endif /* CONFIG_ARCH_DMA_ADDR_T_64BIT */
 
 /*
  * jr_outentry