diff options
Diffstat (limited to 'meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0021-AST2600-Enable-host-searial-port-clock-configuration.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0021-AST2600-Enable-host-searial-port-clock-configuration.patch | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0021-AST2600-Enable-host-searial-port-clock-configuration.patch b/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0021-AST2600-Enable-host-searial-port-clock-configuration.patch new file mode 100644 index 000000000..915b0197f --- /dev/null +++ b/meta-openbmc-mods/meta-ast2600/recipes-bsp/u-boot/files/0021-AST2600-Enable-host-searial-port-clock-configuration.patch @@ -0,0 +1,71 @@ +From c2e2496dfd8cde56e32274b11968185a77f40736 Mon Sep 17 00:00:00 2001 +From: Kuiying Wang <kuiying.wang@intel.com> +Date: Tue, 10 Dec 2019 14:58:10 +0800 +Subject: [PATCH] AST2600: Enable host searial port clock configuration in + u-boot + +In u-boot could read env variable "hostsearialcfg" and set the corresponding +clock for host searail port. + +Tested: +setenv hostsearialcfg 1, speed is set to 192Mhz (baud rate 921600) +other value, speed is set to 24Mhz(baud rate 115200) +by default is 24Mhz. + +Signed-off-by: Kuiying Wang <kuiying.wang@intel.com> +--- + board/aspeed/ast2600_intel/intel.c | 35 +++++++++++++++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +diff --git a/board/aspeed/ast2600_intel/intel.c b/board/aspeed/ast2600_intel/intel.c +index a02e246d0d81..eb9b3959625e 100644 +--- a/board/aspeed/ast2600_intel/intel.c ++++ b/board/aspeed/ast2600_intel/intel.c +@@ -36,9 +36,44 @@ int gpio_abort(void) + } + + #define SCU_BASE 0x1E6E2000 ++#define SCU_338 0x338 //Generate UART 24 MHz Reference from UXCLK ++#define SCU_33C 0x33c //Generate UART 24 MHz Reference from HUXCLK ++#define SCU_338_R_VALUE_192MHZ 0x8e ++#define SCU_338_N_VALUE_192MHZ 0x3c3 ++#define SCU_338_R_VALUE_24MHZ 0x06 ++#define SCU_338_N_VALUE_24MHZ 0x145 ++#define HOST_SERIAL_HIGH_SPEED_192MHZ 1 ++#define R_VALUE_BITS 8 ++#define V_VALUE_BITS 10 ++#define R_V_VALUE_MASK (1 << (R_VALUE_BITS + V_VALUE_BITS)) ++ + int misc_init_r(void) + { + /* This is called near the end of the _r init sequence */ ++ /* By default host serail is set 24Mhz */ ++ uint32_t host_serial_cfg = 0; ++ char *host_serial_cfg_txt = NULL; ++ ++ /* Config the uart clock source based on environment configuration */ ++ host_serial_cfg_txt = env_get("hostserialcfg"); ++ ++ if (host_serial_cfg_txt != NULL) ++ host_serial_cfg = simple_strtoul(host_serial_cfg_txt, NULL, 16); ++ ++ if (host_serial_cfg > HOST_SERIAL_HIGH_SPEED_192MHZ || host_serial_cfg < 0) { ++ printf("Invalid hostserialcfg %x, 24Mhz is set by default!\n", host_serial_cfg); ++ host_serial_cfg = 0; ++ } ++ ++ if (host_serial_cfg & HOST_SERIAL_HIGH_SPEED_192MHZ) { ++ writel((readl(SCU_BASE | SCU_338) & R_V_VALUE_MASK) | ++ (SCU_338_N_VALUE_192MHZ << R_VALUE_BITS) | SCU_338_R_VALUE_192MHZ, ++ SCU_BASE | SCU_338); ++ } else { ++ writel((readl(SCU_BASE | SCU_338) & R_V_VALUE_MASK) | ++ (SCU_338_N_VALUE_24MHZ << R_VALUE_BITS) | SCU_338_R_VALUE_24MHZ, ++ SCU_BASE | SCU_338); ++ } + + return 0; + } +-- +2.7.4 + |