On Fri, 21 Dec 2018, Marek Szyprowski wrote: > Hi > > On 2018-12-21 11:13, Lee Jones wrote: > > On Fri, 14 Dec 2018, Marek Szyprowski wrote: > > > >> From: Beomho Seo <beomho.seo@xxxxxxxxxxx> > >> > >> This patch enables support for UART module in Exynos Audio SubSystem. > >> There are boards (for example TM2), which use it for communication with > >> bluetooth chip. > > Does it though? Or does it enable the interrupt and reset something? > > These calls would probably benefit from some documentation by way of > > comments. > > It only enables routing interrupts out of LPASS HW module. This is > completely transparent for the rest of the system (UART and CPU/GIC). > UART driver will get them via standard ARM/GIC interrupt controller and > UART driver will enable/mask/handle it by itself via standard methods. Sounds fine. But that is not what the commit message says. > >> Signed-off-by: Beomho Seo <beomho.seo@xxxxxxxxxxx> > >> [mszyprow: rephrased commit message, added UART reset] > >> Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > >> Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> > >> --- > >> drivers/mfd/exynos-lpass.c | 4 +++- > >> 1 file changed, 3 insertions(+), 1 deletion(-) > >> > >> diff --git a/drivers/mfd/exynos-lpass.c b/drivers/mfd/exynos-lpass.c > >> index ca829f85672f..2713de989f05 100644 > >> --- a/drivers/mfd/exynos-lpass.c > >> +++ b/drivers/mfd/exynos-lpass.c > >> @@ -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) > > Best regards -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog
