diff options
| -rw-r--r-- | board/freescale/p1022ds/p1022ds.c | 67 | ||||
| -rw-r--r-- | doc/README.fsl-hwconfig | 21 | ||||
| -rw-r--r-- | include/configs/P1022DS.h | 1 |
3 files changed, 80 insertions, 9 deletions
diff --git a/board/freescale/p1022ds/p1022ds.c b/board/freescale/p1022ds/p1022ds.c index 5cdee9f..ee93e8b 100644 --- a/board/freescale/p1022ds/p1022ds.c +++ b/board/freescale/p1022ds/p1022ds.c @@ -27,6 +27,7 @@ #include <asm/mp.h> #include <netdev.h> #include <i2c.h> +#include <hwconfig.h> #include "../common/ngpixis.h" @@ -90,34 +91,58 @@ phys_size_t initdram(int board_type) #define CONFIG_TFP410_I2C_ADDR 0x38 +/* Masks for the SSI_TDM and AUDCLK bits of the ngPIXIS BRDCFG1 register. */ +#define CONFIG_PIXIS_BRDCFG1_SSI_TDM_MASK 0x0c +#define CONFIG_PIXIS_BRDCFG1_AUDCLK_MASK 0x03 + +/* Route the I2C1 pins to the SSI port instead. */ +#define CONFIG_PIXIS_BRDCFG1_SSI_TDM_SSI 0x08 + +/* Choose the 12.288Mhz codec reference clock */ +#define CONFIG_PIXIS_BRDCFG1_AUDCLK_12 0x02 + +/* Choose the 11.2896Mhz codec reference clock */ +#define CONFIG_PIXIS_BRDCFG1_AUDCLK_11 0x01 + int misc_init_r(void) { u8 temp; + const char *audclk; + size_t arglen; - /* Enable the TFP410 Encoder */ + /* For DVI, enable the TFP410 Encoder. */ temp = 0xBF; if (i2c_write(CONFIG_TFP410_I2C_ADDR, 0x08, 1, &temp, sizeof(temp)) < 0) return -1; - - /* Verify if enabled */ - temp = 0; if (i2c_read(CONFIG_TFP410_I2C_ADDR, 0x08, 1, &temp, sizeof(temp)) < 0) return -1; - debug("DVI Encoder Read: 0x%02x\n", temp); temp = 0x10; if (i2c_write(CONFIG_TFP410_I2C_ADDR, 0x0A, 1, &temp, sizeof(temp)) < 0) return -1; - - /* Verify if enabled */ - temp = 0; if (i2c_read(CONFIG_TFP410_I2C_ADDR, 0x0A, 1, &temp, sizeof(temp)) < 0) return -1; - debug("DVI Encoder Read: 0x%02x\n",temp); + /* + * Enable the reference clock for the WM8776 codec, and route the MUX + * pins for SSI. The default is the 12.288 MHz clock + */ + + temp = in_8(&pixis->brdcfg1) & ~(CONFIG_PIXIS_BRDCFG1_SSI_TDM_MASK | + CONFIG_PIXIS_BRDCFG1_AUDCLK_MASK); + temp |= CONFIG_PIXIS_BRDCFG1_SSI_TDM_SSI; + + audclk = hwconfig_arg("audclk", &arglen); + /* Check the first two chars only */ + if (audclk && (strncmp(audclk, "11", 2) == 0)) + temp |= CONFIG_PIXIS_BRDCFG1_AUDCLK_11; + else + temp |= CONFIG_PIXIS_BRDCFG1_AUDCLK_12; + out_8(&pixis->brdcfg1, temp); + return 0; } @@ -310,6 +335,27 @@ int board_eth_init(bd_t *bis) } #ifdef CONFIG_OF_BOARD_SETUP +/** + * ft_codec_setup - fix up the clock-frequency property of the codec node + * + * Update the clock-frequency property based on the value of the 'audclk' + * hwconfig option. If audclk is not specified, then default to 12.288MHz. + */ +static void ft_codec_setup(void *blob, const char *compatible) +{ + const char *audclk; + size_t arglen; + u32 freq; + + audclk = hwconfig_arg("audclk", &arglen); + if (audclk && (strncmp(audclk, "11", 2) == 0)) + freq = 11289600; + else + freq = 12288000; + + do_fixup_by_compat_u32(blob, compatible, "clock-frequency", freq, 1); +} + void ft_board_setup(void *blob, bd_t *bd) { phys_addr_t base; @@ -327,6 +373,9 @@ void ft_board_setup(void *blob, bd_t *bd) #ifdef CONFIG_FSL_SGMII_RISER fsl_sgmii_riser_fdt_fixup(blob); #endif + + /* Update the WM8776 node's clock frequency property */ + ft_codec_setup(blob, "wlf,wm8776"); } #endif diff --git a/doc/README.fsl-hwconfig b/doc/README.fsl-hwconfig new file mode 100644 index 0000000..03fea74 --- /dev/null +++ b/doc/README.fsl-hwconfig @@ -0,0 +1,21 @@ +Freescale-specific 'hwconfig' options. + +This file documents Freescale-specific key:value pairs for the 'hwconfig' +option. See README.hwconfig for general information about 'hwconfig'. + +audclk + Specific to the P1022DS reference board. + + This option specifies which of the two oscillator frequencies should be + routed to the Wolfson WM8776 codec. The ngPIXIS can be programmed to + route either a 11.2896MHz or a 12.288MHz clock. The default is + 12.288MHz. This option has two effects. First, the MUX on the board + will be programmed accordingly. Second, the clock-frequency property + in the codec node in the device tree will be updated to the correct + value. + + 'audclk:11' + Select the 11.2896MHz clock + + 'audclk:12' + Select the 12.288MHz clock diff --git a/include/configs/P1022DS.h b/include/configs/P1022DS.h index 2306e7f..da826fc 100644 --- a/include/configs/P1022DS.h +++ b/include/configs/P1022DS.h @@ -134,6 +134,7 @@ #define CONFIG_BOARD_EARLY_INIT_F #define CONFIG_BOARD_EARLY_INIT_R #define CONFIG_MISC_INIT_R +#define CONFIG_HWCONFIG #define CONFIG_FSL_NGPIXIS #define PIXIS_BASE 0xffdf0000 /* PIXIS registers */ |