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board: stm32mp1: add timeout for I/O compensation ready

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This patch avoids infinite loop when I/O compensation failed,
it adds a 1s timeout to detect error.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrick Delaunay 2020-04-22 14:29:16 +02:00
parent 3cab9aae45
commit 5ef642c173
1 changed files with 12 additions and 4 deletions
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16
board/st/stm32mp1/stm32mp1.c
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@ -32,6 +32,7 @@
#include <asm/arch/sys_proto.h> #include <asm/arch/sys_proto.h>
#include <jffs2/load_kernel.h> #include <jffs2/load_kernel.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/iopoll.h>
#include <power/regulator.h> #include <power/regulator.h>
#include <usb/dwc2_udc.h> #include <usb/dwc2_udc.h>
@ -463,10 +464,10 @@ static void sysconf_init(void)
struct udevice *pwr_dev; struct udevice *pwr_dev;
struct udevice *pwr_reg; struct udevice *pwr_reg;
struct udevice *dev; struct udevice *dev;
int ret;
u32 otp = 0; u32 otp = 0;
#endif #endif
u32 bootr; int ret;
u32 bootr, val;
syscfg = (u8 *)syscon_get_first_range(STM32MP_SYSCON_SYSCFG); syscfg = (u8 *)syscon_get_first_range(STM32MP_SYSCON_SYSCFG);
@ -543,8 +544,15 @@ static void sysconf_init(void)
*/ */
writel(SYSCFG_CMPENSETR_MPU_EN, syscfg + SYSCFG_CMPENSETR); writel(SYSCFG_CMPENSETR_MPU_EN, syscfg + SYSCFG_CMPENSETR);
while (!(readl(syscfg + SYSCFG_CMPCR) & SYSCFG_CMPCR_READY)) /* poll until ready (1s timeout) */
; ret = readl_poll_timeout(syscfg + SYSCFG_CMPCR, val,
val & SYSCFG_CMPCR_READY,
1000000);
if (ret) {
pr_err("SYSCFG: I/O compensation failed, timeout.\n");
led_error_blink(10);
}
clrbits_le32(syscfg + SYSCFG_CMPCR, SYSCFG_CMPCR_SW_CTRL); clrbits_le32(syscfg + SYSCFG_CMPCR, SYSCFG_CMPCR_SW_CTRL);
#endif #endif
} }