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stm32f7: use clock driver to enable sdram controller clock

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This patch also removes the sdram/fmc clock enable from board specific
code.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
cc: Christophe KERELLO <christophe.kerello@st.com>
This commit is contained in:
Vikas Manocha 2017-04-10 15:02:55 -07:00 • committed by Tom Rini
parent 2d9c33ca3f
commit d0b24c1aa9
3 changed files with 16 additions and 2 deletions
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1
arch/arm/dts/stm32f746.dtsi
View file

@ -74,6 +74,7 @@
fmc: fmc@A0000000 {
compatible = "st,stm32-fmc";
reg = <0xA0000000 0x1000>;
clocks = <&rcc 0 64>;
u-boot,dm-pre-reloc;
};

2
board/st/stm32f746-disco/stm32f746-disco.c
View file

@ -51,8 +51,6 @@ int dram_init(void)
if (rv)
return rv;
clock_setup(FMC_CLOCK_CFG);
rv = uclass_get_device(UCLASS_RAM, 0, &dev);
if (rv) {
debug("DRAM init failed: %d\n", rv);

15
drivers/ram/stm32_sdram.c
View file

@ -6,6 +6,7 @@
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <ram.h>
#include <asm/io.h>
@ -122,6 +123,20 @@ int stm32_sdram_init(void)
static int stm32_fmc_probe(struct udevice *dev)
{
#ifdef CONFIG_CLK
int ret;
struct clk clk;
ret = clk_get_by_index(dev, 0, &clk);
if (ret < 0)
return ret;
ret = clk_enable(&clk);
if (ret) {
dev_err(dev, "failed to enable clock\n");
return ret;
}
#endif
stm32_sdram_init();
return 0;
}