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| author | Subrata Banik <subrata.banik@intel.com> | 2017-08-10 13:54:39 +0530 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2017-08-14 17:57:55 +0000 |
| commit | cdea598e8912e0320bd7337c1b6736025676b429 (patch) | |
| tree | b0718cf5523479cf6d11e36ad7d224396dbbcc91 | |
| parent | dfeb1c4da9be7ac97bd31f580ff2fff0c4b3256e (diff) | |
| download | coreboot-cdea598e8912e0320bd7337c1b6736025676b429.tar.xz | |
common/block/lpss: Add CLK read function into LPSS common
This patch add new API to read LPSS CLK register. Also combine multiple
LPSS_CLOCK_CTL_REG writes into a single write inside lpss_clk_update function.
Change-Id: I420919ad9154c4cf426bc232c5eb59d95fd698d2
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/20938
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/lpss.h | 3 | ||||
| -rw-r--r-- | src/soc/intel/common/block/lpss/lpss.c | 13 |
2 files changed, 14 insertions, 2 deletions
diff --git a/src/soc/intel/common/block/include/intelblocks/lpss.h b/src/soc/intel/common/block/include/intelblocks/lpss.h index 138340df86..c6caae2675 100644 --- a/src/soc/intel/common/block/include/intelblocks/lpss.h +++ b/src/soc/intel/common/block/include/intelblocks/lpss.h @@ -30,4 +30,7 @@ void lpss_clk_update(uintptr_t base, uint32_t clk_m_val, uint32_t clk_n_val); /* Check if controller is in reset. */ bool lpss_is_controller_in_reset(uintptr_t base); +/* Read LPSS CLK register */ +uint32_t lpss_clk_read(uintptr_t base); + #endif /* SOC_INTEL_COMMON_BLOCK_LPSS_H */ diff --git a/src/soc/intel/common/block/lpss/lpss.c b/src/soc/intel/common/block/lpss/lpss.c index feacef370f..6d4fb336f3 100644 --- a/src/soc/intel/common/block/lpss/lpss.c +++ b/src/soc/intel/common/block/lpss/lpss.c @@ -65,7 +65,16 @@ void lpss_clk_update(uintptr_t base, uint32_t clk_m_val, uint32_t clk_n_val) addr += LPSS_CLOCK_CTL_REG; clk_sel = LPSS_CLOCK_DIV_N(clk_n_val) | LPSS_CLOCK_DIV_M(clk_m_val); + clk_sel |= LPSS_CNT_CLK_UPDATE | LPSS_CNT_CLOCK_EN; - write32(addr, clk_sel | LPSS_CNT_CLK_UPDATE); - write32(addr, clk_sel | LPSS_CNT_CLOCK_EN); + write32(addr, clk_sel); +} + +uint32_t lpss_clk_read(uintptr_t base) +{ + uint8_t *addr = (void *)base; + + addr += LPSS_CLOCK_CTL_REG; + + return read32(addr); } |