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Ip=[198.47.23.195]; Helo=[lewvzet201.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9DB.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR10MB997603 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean Add a helper macro to write and verify a 32-bit value to a memory-mapped register. This is essential for hardware errata workarounds that require confirmation that register writes have taken effect before proceeding with initialization. Signed-off-by: Udit Kumar --- arch/arm/mach-k3/include/mach/hardware.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm/mach-k3/include/mach/hardware.h b/arch/arm/mach-k3/include/mach/hardware.h index 81b5f1fa45e..b337a71956f 100644 --- a/arch/arm/mach-k3/include/mach/hardware.h +++ b/arch/arm/mach-k3/include/mach/hardware.h @@ -126,4 +126,14 @@ struct rom_extended_boot_data { u32 get_boot_device(void); const char *get_reset_reason(void); + +#define writel_verify(val, addr) \ +do { \ + u32 readback; \ + writel(val, addr); \ + readback = readl(addr); \ + if (readback != val) \ + printf("writel_verify failed: addr=0x%p, expected=0x%x, got=0x%x\n", \ + (void *)(addr), (val), readback); \ +} while (0) #endif /* _ASM_ARCH_HARDWARE_H_ */ -- 2.34.1