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MXS_NAND: Add clock support for iMX8 

Since iMX8 has enabled clock uclass, we can parse the clocks from DTB
and enable them in GPMI driver.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Ye Li 2020-05-04 22:09:01 +08:00 committed by Stefano Babic
parent 39320e7256
commit a59691280d
1 changed files with 69 additions and 0 deletions
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69
drivers/mtd/nand/raw/mxs_nand_dt.c
View File

@ -2,6 +2,8 @@
* NXP GPMI NAND flash driver (DT initialization)
*
* Copyright (C) 2018 Toradex
* Copyright 2019 NXP
*
* Authors:
* Stefan Agner <stefan.agner@toradex.com>
*
@ -14,6 +16,7 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/printk.h>
#include <clk.h>
#include <mxs_nand.h>
@ -91,6 +94,72 @@ static int mxs_nand_dt_probe(struct udevice *dev)
info->legacy_bch_geometry = dev_read_bool(dev, "fsl,legacy-bch-geometry");
if (IS_ENABLED(CONFIG_CLK) && IS_ENABLED(CONFIG_IMX8)) {
/* Assigned clock already set clock */
struct clk gpmi_clk;
ret = clk_get_by_name(dev, "gpmi_io", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi io clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi io clk: %d\n", ret);
return ret;
}
ret = clk_get_by_name(dev, "gpmi_apb", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_apb clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_apb clk: %d\n", ret);
return ret;
}
ret = clk_get_by_name(dev, "gpmi_bch", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_bch clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_bch clk: %d\n", ret);
return ret;
}
ret = clk_get_by_name(dev, "gpmi_apb_bch", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_apb_bch clk: %d\n", ret);
return ret;
}
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_apb_bch clk: %d\n", ret);
return ret;
}
/* this clock is used for apbh_dma, since the apbh dma does not support DM,
* we optionally enable it here
*/
ret = clk_get_by_name(dev, "gpmi_apbh_dma", &gpmi_clk);
if (ret < 0) {
debug("Can't get gpmi_apbh_dma clk: %d\n", ret);
} else {
ret = clk_enable(&gpmi_clk);
if (ret < 0) {
debug("Can't enable gpmi_apbh_dma clk: %d\n", ret);
}
}
}
return mxs_nand_init_ctrl(info);
}