Merge tag 'block-5.14-2021-08-07' of git://git.kernel.dk/linux-block

[linux-2.6-microblaze.git] / arch / arm / mach-ixp4xx / common.c

diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index 007a444..b5eadd7 100644 (file)
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -27,12 +27,12 @@
 #include <linux/cpu.h>
 #include <linux/pci.h>
 #include <linux/sched_clock.h>
+#include <linux/soc/ixp4xx/cpu.h>
 #include <linux/irqchip/irq-ixp4xx.h>
 #include <linux/platform_data/timer-ixp4xx.h>
 #include <linux/dma-map-ops.h>
 #include <mach/udc.h>
 #include <mach/hardware.h>
-#include <mach/io.h>
 #include <linux/uaccess.h>
 #include <asm/page.h>
 #include <asm/exception.h>
@@ -44,6 +44,27 @@
 
 #include "irqs.h"
 
+u32 ixp4xx_read_feature_bits(void)
+{
+       u32 val = ~__raw_readl(IXP4XX_EXP_CFG2);
+
+       if (cpu_is_ixp42x_rev_a0())
+               return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP |
+                                              IXP4XX_FEATURE_AES);
+       if (cpu_is_ixp42x())
+               return val & IXP42X_FEATURE_MASK;
+       if (cpu_is_ixp43x())
+               return val & IXP43X_FEATURE_MASK;
+       return val & IXP46X_FEATURE_MASK;
+}
+EXPORT_SYMBOL(ixp4xx_read_feature_bits);
+
+void ixp4xx_write_feature_bits(u32 value)
+{
+       __raw_writel(~value, IXP4XX_EXP_CFG2);
+}
+EXPORT_SYMBOL(ixp4xx_write_feature_bits);
+
 #define IXP4XX_TIMER_FREQ 66666000
 
 /*************************************************************************
@@ -215,6 +236,27 @@ static struct resource ixp46x_i2c_resources[] = {
        }
 };
 
+/* A single 32-bit register on IXP46x */
+#define IXP4XX_HWRANDOM_BASE_PHYS      0x70002100
+
+static struct resource ixp46x_hwrandom_resource[] = {
+       {
+               .start = IXP4XX_HWRANDOM_BASE_PHYS,
+               .end = IXP4XX_HWRANDOM_BASE_PHYS + 0x3,
+               .flags = IORESOURCE_MEM,
+       },
+};
+
+static struct platform_device ixp46x_hwrandom_device = {
+       .name           = "ixp4xx-hwrandom",
+       .id             = -1,
+       .dev = {
+               .coherent_dma_mask      = DMA_BIT_MASK(32),
+       },
+       .resource = ixp46x_hwrandom_resource,
+       .num_resources  = ARRAY_SIZE(ixp46x_hwrandom_resource),
+};
+
 /*
  * I2C controller. The IXP46x uses the same block as the IOP3xx, so
  * we just use the same device name.
@@ -227,7 +269,8 @@ static struct platform_device ixp46x_i2c_controller = {
 };
 
 static struct platform_device *ixp46x_devices[] __initdata = {
-       &ixp46x_i2c_controller
+       &ixp46x_hwrandom_device,
+       &ixp46x_i2c_controller,
 };
 
 unsigned long ixp4xx_exp_bus_size;