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The AEMIF's bindings in the Linux tree have a node for the AEMIF controller and then a node for each AEMIF's chip select. This CS node doesn't have a compatible property but describes the timing parameters used by a given chip select. The U-Boot DM framework expects every node to have a 'compatible' property. If no 'compatible' is present in a node, its children won't be parsed by u-boot. Add DM support to the ti-aemif driver. Add a new ti-aemif-cs driver to comply with the Linux bindings and the U-Boot's DM philosophy. This driver handles the timing parameters of an AEMIF's chip select so move aemif_cs_configure() from ti-aemif.c to ti-aemif-cs.c. Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* DaVinci / Keystone2 : AEMIF's chip select configuration
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*
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*/
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#include <asm/io.h>
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#include <clk.h>
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#include <dm.h>
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#include "ti-aemif-cs.h"
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#define AEMIF_CONFIG(cs) (0x10 + ((cs) * 4))
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#define AEMIF_CFG_SELECT_STROBE(v) ((v) ? 1 << 31 : 0)
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#define AEMIF_CFG_EXTEND_WAIT(v) ((v) ? 1 << 30 : 0)
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#define AEMIF_CFG_WR_SETUP(v) (((v) & 0x0f) << 26)
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#define AEMIF_CFG_WR_STROBE(v) (((v) & 0x3f) << 20)
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#define AEMIF_CFG_WR_HOLD(v) (((v) & 0x07) << 17)
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#define AEMIF_CFG_RD_SETUP(v) (((v) & 0x0f) << 13)
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#define AEMIF_CFG_RD_STROBE(v) (((v) & 0x3f) << 7)
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#define AEMIF_CFG_RD_HOLD(v) (((v) & 0x07) << 4)
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#define AEMIF_CFG_TURN_AROUND(v) (((v) & 0x03) << 2)
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#define AEMIF_CFG_WIDTH(v) (((v) & 0x03) << 0)
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#define set_config_field(reg, field, val) \
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do { \
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if ((val) != -1) { \
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(reg) &= ~AEMIF_CFG_##field(0xffffffff); \
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(reg) |= AEMIF_CFG_##field((val)); \
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} \
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} while (0)
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void aemif_cs_configure(int cs, struct aemif_config *cfg)
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{
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unsigned long tmp;
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tmp = __raw_readl(cfg->base + AEMIF_CONFIG(cs));
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set_config_field(tmp, SELECT_STROBE, cfg->select_strobe);
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set_config_field(tmp, EXTEND_WAIT, cfg->extend_wait);
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set_config_field(tmp, WR_SETUP, cfg->wr_setup);
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set_config_field(tmp, WR_STROBE, cfg->wr_strobe);
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set_config_field(tmp, WR_HOLD, cfg->wr_hold);
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set_config_field(tmp, RD_SETUP, cfg->rd_setup);
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set_config_field(tmp, RD_STROBE, cfg->rd_strobe);
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set_config_field(tmp, RD_HOLD, cfg->rd_hold);
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set_config_field(tmp, TURN_AROUND, cfg->turn_around);
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set_config_field(tmp, WIDTH, cfg->width);
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__raw_writel(tmp, cfg->base + AEMIF_CONFIG(cs));
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}
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static const struct udevice_id aemif_cs_ids[] = {
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{ .compatible = "ti,da850-aemif-cs", },
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{},
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};
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U_BOOT_DRIVER(ti_aemif_cs) = {
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.name = "ti_aemif_cs",
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.id = UCLASS_MEMORY,
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.of_match = aemif_cs_ids,
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};
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