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soc/amd/stoneyridge: Expand 48MHz for both osc out signals 

There are typically two configurable oscillator outputs available on APUs
or FCHs.  Convert the enable function to work with either one.

BUG=b:none.
TEST=Build and boot grunt.

Change-Id: I4b89b1e3b7963472471e34897bdd00176dbdb914
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/c/31386
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
This commit is contained in:
Richard Spiegel 2019-02-12 19:17:02 -07:00 committed by Patrick Georgi
parent 8ca2af1c0d
commit c93d4abb99
2 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/soc/amd/stoneyridge/include/soc/southbridge.h
View File

@ -186,6 +186,7 @@
#define MISC_CLK_CNTL1 0x40
#define CG1PLL_FBDIV_TEST BIT(26)
#define OSCOUT1_CLK_OUTPUT_ENB BIT(2) /* 0 = Enabled, 1 = Disabled */
#define OSCOUT2_CLK_OUTPUT_ENB BIT(7) /* 0 = Enabled, 1 = Disabled */
/* XHCI_PM Registers: 0xfed81c00 */
#define XHCI_PM_INDIRECT_INDEX 0x48
@ -477,7 +478,7 @@ struct soc_power_reg {
void enable_aoac_devices(void);
void sb_enable_rom(void);
void configure_stoneyridge_i2c(void);
void sb_clk_output_48Mhz(void);
void sb_clk_output_48Mhz(u32 osc);
void sb_disable_4dw_burst(void);
void sb_enable(struct device *dev);
void southbridge_final(void *chip_info);

18
src/soc/amd/stoneyridge/southbridge.c
View File

@ -389,20 +389,28 @@ static void sb_enable_legacy_io(void)
pm_write32(PM_DECODE_EN, reg | LEGACY_IO_EN);
}
void sb_clk_output_48Mhz(void)
void sb_clk_output_48Mhz(u32 osc)
{
u32 ctrl;
u32 *misc_clk_cntl_1_ptr = (u32 *)(uintptr_t)(MISC_MMIO_BASE
+ MISC_CLK_CNTL1);
/*
* Enable the X14M_25M_48M_OSC pin and leaving it at it's default so
* 48Mhz will be on ball AP13 (FT3b package)
* Clear the disable for OSCOUT1 (signal typically named XnnM_25M_48M)
* or OSCOUT2 (USBCLK/25M_48M_OSC). The frequency defaults to 48MHz.
*/
ctrl = read32(misc_clk_cntl_1_ptr);
/* clear the OSCOUT1_ClkOutputEnb to enable the 48 Mhz clock */
ctrl &= ~OSCOUT1_CLK_OUTPUT_ENB;
switch (osc) {
case 1:
ctrl &= ~OSCOUT1_CLK_OUTPUT_ENB;
break;
case 2:
ctrl &= ~OSCOUT2_CLK_OUTPUT_ENB;
break;
default:
return; /* do nothing if invalid */
}
write32(misc_clk_cntl_1_ptr, ctrl);
}