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ARM: davinci: Add clock for CPPI 4.1 DMA engine 

The CPPI 4.1 DMA in USB subsystem shares its clock with the
USB OTG, and most of the time, the clock will be enabled by
USB.  But during the init of the DMA, USB is not enabled
(waiting for DMA), and then we must enable the DMA clock
before doing anything.

Add clock for the CPPI 4.1 DMA engine.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
[nsekhar@ti.com: minor commit message tweaks]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
This commit is contained in:
Alexandre Bailon 2017-04-05 19:17:50 +02:00 committed by Sekhar Nori
parent 28d4d1d0e4
commit 398dbc776a
2 changed files with 12 additions and 0 deletions
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6
arch/arm/mach-davinci/da830.c
View File

@ -304,6 +304,11 @@ static struct clk usb20_clk = {
.gpsc = 1,
};
static struct clk cppi41_clk = {
.name = "cppi41",
.parent = &usb20_clk,
};
static struct clk aemif_clk = {
.name = "aemif",
.parent = &pll0_sysclk3,
@ -413,6 +418,7 @@ static struct clk_lookup da830_clks[] = {
CLK("davinci-mcasp.1", NULL, &mcasp1_clk),
CLK("davinci-mcasp.2", NULL, &mcasp2_clk),
CLK("musb-da8xx", "usb20", &usb20_clk),
CLK("cppi41-dmaengine", NULL, &cppi41_clk),
CLK(NULL, "aemif", &aemif_clk),
CLK(NULL, "aintc", &aintc_clk),
CLK(NULL, "secu_mgr", &secu_mgr_clk),

6
arch/arm/mach-davinci/da850.c
View File

@ -401,6 +401,11 @@ static struct clk usb20_clk = {
.gpsc = 1,
};
static struct clk cppi41_clk = {
.name = "cppi41",
.parent = &usb20_clk,
};
static struct clk spi0_clk = {
.name = "spi0",
.parent = &pll0_sysclk2,
@ -560,6 +565,7 @@ static struct clk_lookup da850_clks[] = {
CLK("davinci-nand.0", "aemif", &aemif_nand_clk),
CLK("ohci-da8xx", "usb11", &usb11_clk),
CLK("musb-da8xx", "usb20", &usb20_clk),
CLK("cppi41-dmaengine", NULL, &cppi41_clk),
CLK("spi_davinci.0", NULL, &spi0_clk),
CLK("spi_davinci.1", NULL, &spi1_clk),
CLK("vpif", NULL, &vpif_clk),