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drivers: samsung: Introduce exynos-speedy

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Speedy is a serial communication bus that is typically used in
Exynos SoC devices for communicating with a PMIC. Implement
basic support for it, as well as add its first user - s2mps17 in
board-dreamlte.

Also, while at it, implement a simple readl function.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
This commit is contained in:
Ivaylo Ivanov
2024-10-28 15:00:03 +02:00
parent 8b562d28fa
commit eba7aec49d
6 changed files with 331 additions and 5 deletions
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9
lib/unic/string.h
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@@ -7,6 +7,7 @@
#define STRING_H_
#include "stddef.h"
#include "stdint.h"
#define LBLOCKSIZE (sizeof(long))
#define UNALIGNED(X) ((long)X & (LBLOCKSIZE - 1))
@@ -26,6 +27,7 @@ char *strchr (const char *s, int c);
char *strrchr (const char *s, int c);
long atol (const char *s);
void writel (unsigned int value, void* address);
uint32_t readl(volatile uint32_t *addr);
// C-driven optimized functions
void *memset (void *m, int c, size_t n);
@@ -37,6 +39,7 @@ void *memset (void *m, int c, size_t n);
/* How many bytes are copied each iteration of the 4X unrolled loop. */
#define BIGBLOCKSIZE (sizeof(long) << 2)
static void *__optimized_memcpy (void *dst0, const void *src0, size_t len0) __attribute__((unused));
static void *__optimized_memcpy (void *dst0, const void *src0, size_t len0)
{
char *dst = dst0;
@@ -63,9 +66,9 @@ static void *__optimized_memcpy (void *dst0, const void *src0, size_t len0)
len0 -= LBLOCKSIZE;
}
/* Pick up any residual with a byte copier. */
dst = (char*)aligned_dst;
src = (char*)aligned_src;
/* Pick up any residual with a byte copier. */
dst = (char*)aligned_dst;
src = (char*)aligned_src;
}
while (len0--)