| From: |
| Chin-Ting Kuo <chin-ting_kuo-AT-aspeedtech.com> |
| To: |
| <robh-AT-kernel.org>, <krzk+dt-AT-kernel.org>, <conor+dt-AT-kernel.org>, <joel-AT-jms.id.au>, <andrew-AT-codeconstruct.com.au>, <clg-AT-kaod.org>, <broonie-AT-kernel.org>, <devicetree-AT-vger.kernel.org>, <linux-arm-kernel-AT-lists.infradead.org>, <linux-aspeed-AT-lists.ozlabs.org>, <linux-kernel-AT-vger.kernel.org>, <openbmc-AT-lists.ozlabs.org>, <linux-spi-AT-vger.kernel.org>, <BMC-SW-AT-aspeedtech.com> |
| Subject: |
| [PATCH 0/6] spi: aspeed: Improve clock, timing and address decoding logic |
| Date: |
| Wed, 01 Oct 2025 19:25:59 +0800 |
| Message-ID: |
| <20251001112605.1130723-1-chin-ting_kuo@aspeedtech.com> |
| Archive-link: |
| Article |
This patch series introduces several improvements to the
ASPEED SPI driver, targeting better stability, compatibility
and, flexibility across multiple ASPEED platforms.
Key changes include:
* Clock selection strategy update
Improves fallback logic when timing calibration is skipped or
fails, ensuring reliable boot behavior.
* Timing calibration enhancement for AST2600
Replaces the previous "first-pass" strategy with a more robust
algorithm that selects the optimal timing point.
* Default address decoding assignment
Ensures each chip select (CS) has a valid decoding range during
probe, avoiding detection failures due to missing or incorrect
bootloader setup.
* Centralized address decoding management
Refactors the decoding logic to centrally assign address windows,
preventing improper trimming and improving layout flexibility.
* Per-platform decoding adjustment
Introduces platform-specific `adjust_window` callbacks to handle
platform specific hardware constraints for address decoding range.
* Selective memory mapping
Optimizes memory usage by mapping only the required address window
per CS to avoid exhaustion.
Chin-Ting Kuo (6):
spi: aspeed: Update clock selection strategy
spi: aspeed: Improve timing calibration algorithm for AST2600 platform
spi: aspeed: Force default address decoding range assignment for each
CS
spi: aspeed: Centralize address decoding region management
spi: aspeed: Add per-platform adjust_window callback for decoding
range
spi: aspeed: Only map necessary address window region
drivers/spi/spi-aspeed-smc.c | 644 ++++++++++++++++++++++++++---------
1 file changed, 489 insertions(+), 155 deletions(-)
--
2.34.1
