leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

spi: mt7621-spi: use clock frequency from clk driver

Browse Source 
This patch lets the spi driver to use clock provided by the clk driver
since the new clk-mt7628 driver provides accurate sys clock frequency.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
This commit is contained in:
Weijie Gao 2019-09-25 17:45:23 +08:00 committed by Daniel Schwierzeck
parent 2d767a7497
commit f09978566b
1 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/spi/mt7621_spi.c
View File

@ -9,6 +9,7 @@
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <spi.h>
#include <wait_bit.h>
@ -266,19 +267,24 @@ static int mt7621_spi_xfer(struct udevice *dev, unsigned int bitlen,
static int mt7621_spi_probe(struct udevice *dev)
{
struct mt7621_spi *rs = dev_get_priv(dev);
struct clk clk;
int ret;
rs->base = dev_remap_addr(dev);
if (!rs->base)
return -EINVAL;
/*
* Read input clock via DT for now. At some point this should be
* replaced by implementing a clock driver for this SoC and getting
* the SPI frequency via this clock driver.
*/
rs->sys_freq = dev_read_u32_default(dev, "clock-frequency", 0);
ret = clk_get_by_index(dev, 0, &clk);
if (ret < 0) {
printf("Please provide a clock!\n");
return ret;
}
clk_enable(&clk);
rs->sys_freq = clk_get_rate(&clk);
if (!rs->sys_freq) {
printf("Please provide clock-frequency!\n");
printf("Please provide a valid clock!\n");
return -EINVAL;
}