[PATCH v9 0/5] fix the meson NFC clock

Liang Yang
2022-09-07T08:04:44Z

EMMC and NAND have the same clock control register named 'SD_EMMC_CLOCK'
which is defined in EMMC port internally. bit0~5 of 'SD_EMMC_CLOCK' is
the divider and bit6~7 is the mux for fix pll and xtal. At the beginning,
a common MMC and NAND sub-clock was discussed and planed to be implemented
as NFC clock provider, but now this series of patches of a common MMC and
NAND sub-clock are never being accepted and the current binding was never
valid. the reasons are:
1. EMMC and NAND, which are mutually exclusive anyway
2. coupling the EMMC and NAND.
3. it seems that a common MMC and NAND sub-clock is over engineered.
and let us see the link for more information:
https://lore.kernel.org/all/20220121074508.42168-5-liang.yang@amlogic.com
so The meson nfc can't work now, let us rework the clock.

Changes since v8 [9]
- add reg-names on properties in yaml
- delete the uncessary quotes in yaml

Changes since v7 [8]
- use COMMON_CLK && (ARCH_MESON || COMPILE_TEST) instead of
ARCH_MESON || COMPILE_TEST || COMMON_CLK.
- collect the review and ack

Changes since v6 [7]
- use COMMON_CLK instead of !HAVE_LEGACY_CLK

Changes since v5 [6]
- add change log for patch 3/5
- add patch 5/5 to fix the reporting error of test robot

Changes since v4 [5]
- split the dt binding patch into two patches, one for fixing,
clock, the other for coverting to yaml
- split the nfc driver patch into two patches, one for fixing
clock, the other for refining the get nfc resource.

Changes since v3 [4]
- use devm_platform_ioremap_resource_byname
- dt_binding_check for mtd/amlogic,meson-nand.yaml

Changes since v2 [3]
- use fw_name from dts, instead the wrong way using __clk_get_name
- reg resource size change to 0x800
- use reg-names

Changes since v1 [2]
- use clk_parent_data instead of parent_names
- define a reg resource instead of sd_emmc_c_clkc

[1] https://lore.kernel.org/r/20220106033130.37623-1-liang.yang@amlogic.com
https://lore.kernel.org/r/20220106032504.23310-1-liang.yang@amlogic.com
[2] https://lore.kernel.org/all/20220217063346.21691-1-liang.yang@amlogic.com
[3] https://lore.kernel.org/all/20220318124121.26117-1-liang.yang@amlogic.com
[4] https://lore.kernel.org/all/20220402074921.13316-1-liang.yang@amlogic.com/
[5] https://lore.kernel.org/all/20220513123404.48513-1-liang.yang@amlogic.com/
[6] https://lore.kernel.org/all/20220607064731.13367-1-liang.yang@amlogic.com/
[7] https://lore.kernel.org/all/20220624131257.29906-1-liang.yang@amlogic.com/
[8] https://lore.kernel.org/all/20220906060034.2528-1-liang.yang@amlogic.com/

Liang Yang (5):
dt-bindings: nand: meson: fix meson nfc clock
mtd: rawnand: meson: fix the clock
mtd: rawnand: meson: refine resource getting in probe
dt-bindings: nand: meson: convert txt to yaml
mtd: rawnand: meson: not support legacy clock

.../bindings/mtd/amlogic,meson-nand.txt | 60 ------------
.../bindings/mtd/amlogic,meson-nand.yaml | 93 +++++++++++++++++++
drivers/mtd/nand/raw/Kconfig | 2 +-
drivers/mtd/nand/raw/meson_nand.c | 86 +++++++++--------
4 files changed, 136 insertions(+), 105 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/mtd/amlogic,meson-nand.txt
create mode 100644 Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml

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2.37.1