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mfd: exynos-lpass: Enable UART module support

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This patch enables proper interrupts routing between UART module
in Exynos Audio SubSystem and the rest of the SoC. This routing is
completely transparent for UART device and CPU/GIC. UART driver requests
interrupts from the respective controller and enables/masks/handles it
by itself via standard methods.

There are boards (for example TM2), which use UART module in Exynos Audio
SubStem for communication with BlueTooth chip.

Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
[mszyprow: rephrased commit message, added UART reset]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Beomho Seo 2018-12-21 15:32:28 +01:00 committed by Lee Jones
parent 9e28989d41
commit 3f2d347e85
1 changed files with 3 additions and 1 deletions
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4
drivers/mfd/exynos-lpass.c
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@ -82,11 +82,13 @@ static void exynos_lpass_enable(struct exynos_lpass *lpass)
LPASS_INTR_SFR | LPASS_INTR_DMA | LPASS_INTR_I2S);
regmap_write(lpass->top, SFR_LPASS_INTR_CPU_MASK,
LPASS_INTR_SFR | LPASS_INTR_DMA | LPASS_INTR_I2S);
LPASS_INTR_SFR | LPASS_INTR_DMA | LPASS_INTR_I2S |
LPASS_INTR_UART);
exynos_lpass_core_sw_reset(lpass, LPASS_I2S_SW_RESET);
exynos_lpass_core_sw_reset(lpass, LPASS_DMA_SW_RESET);
exynos_lpass_core_sw_reset(lpass, LPASS_MEM_SW_RESET);
exynos_lpass_core_sw_reset(lpass, LPASS_UART_SW_RESET);
}
static void exynos_lpass_disable(struct exynos_lpass *lpass)