mt8173 IC spi HW has 4 gpio group, it's possible to support
max <= 4 slave devices, even mtk spi HW is not congruent to spi core.
1. When a device do a spi_message transfer, spi HW should know
which pad-group this device is on, and then writes pad-select
register.
2. Mtk pad-select register just selects which MISO pin HW will
receive data. For example, pad-select=1(select spi1 pins), HW just
receives data from spi1 MISO, but it still send waveform to all 4
group cs/clk/mosi. If cs pin in other groups is still spi mode,
after spi1 is selected(by active cs pin), devices on other group
will also be selected.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
controller_data is related with device, so move to master->setup
function.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
mtk_spi_config() and mtk_spi_prepare_message() both initialize
spi register, so remove mtk_spi_config() and init all register
in mtk_spi_prepare_message().
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Commit adcbcfea15 ("spi: mediatek: fix spi clock usage error")
added a new sel_clk but introduced bugs in the error paths since
the wrong struct clk pointers are passed to PTR_ERR().
Fixes: adcbcfea15 ("spi: mediatek: fix spi clock usage error")
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Mediatek spi HW can't set cs inactive(keep cs high) directly.
Instead, it supplies pause mode to do it indirectly. If driver
unsets SPI_CMD_PAUSE_MODE in CMD_REG, it also needs to reset
internal state machine to let cs inactive at once.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch removes clk_disable_unprepare() in mtk_spi_remove().
clk_disable_prepare/unprepare must be balance, spi-clk is disabled
in mtk_spi_probe, so not needs to disable again.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
enable pause interrupt should use SPI_CMD_PAUSE_IE MACRO,
so fix it.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch replaces *_time name in mtk_spi_prepare_transfer().
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
this patch replaces int with u32, deletes TAB, and defines
MTK_SPI_PAUSE_INT_STATUS marco.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
mediatek spi driver uses readl/writel, so add linux/io.h,
even so it's implicitly imported by spi/spi.h
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch removes SPI_CMD_*_OFFSET defines, and uses the BIT(x)
defines instead.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
TX_ENDIAN/RX_ENDIAN bits define whether to reverse the endian
order of the data DMA from/to memory. The endian order should
keep the same with cpu endian.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
clock in prepare_hardware/unprepare_hardware is redundant
with pm_runtime, so remove them.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
writel() already does a cpu_to_le32 conversion, so
remove cpu_to_le32().
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch fixes endian warnings detected by sparse:
- sparse: incorrect type in argument 1 (different base types)
expected unsigned int [unsigned] val
got restricted __le32 [usertype] <noident>
- sparse: incorrect type in argument 1 (different base types)
expected unsigned int [unsigned] val
got restricted __le32 [usertype] <noident>
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Remove extra space and make the alias matches driver name.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Leilk Liu