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pcmcia: at91_cf: Use syscon to configure the MC/smc 

Use syscon/regmap to configure the smc part of the memory controller. This
allows to avoid using mach/at91rm9200_mc.h and mach/at91_ramc.h and to compile
the driver in a multiplatform configuration.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Alexandre Belloni 2015-03-16 14:17:50 +01:00
parent 0506b2986c
commit eaa9a21dd1
2 changed files with 14 additions and 12 deletions
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1
drivers/pcmcia/Kconfig
View File

@ -277,7 +277,6 @@ config AT91_CF
tristate "AT91 CompactFlash Controller"
depends on PCI
depends on PCMCIA && ARCH_AT91
depends on !ARCH_MULTIPLATFORM
help
Say Y here to support the CompactFlash controller on AT91 chips.
Or choose M to compile the driver as a module named "at91_cf".

25
drivers/pcmcia/at91_cf.c
View File

@ -20,16 +20,15 @@
#include <linux/platform_data/atmel.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/atmel-mc.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/regmap.h>
#include <pcmcia/ss.h>
#include <mach/at91rm9200_mc.h>
#include <mach/at91_ramc.h>
/*
* A0..A10 work in each range; A23 indicates I/O space; A25 is CFRNW;
* some other bit in {A24,A22..A11} is nREG to flag memory access
@ -40,6 +39,8 @@
#define CF_IO_PHYS (1 << 23)
#define CF_MEM_PHYS (0x017ff800)
struct regmap *mc;
/*--------------------------------------------------------------------------*/
struct at91_cf_socket {
@ -155,10 +156,7 @@ static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
/*
* Use 16 bit accesses unless/until we need 8-bit i/o space.
*/
csr = at91_ramc_read(0, AT91_SMC_CSR(cf->board->chipselect)) & ~AT91_SMC_DBW;
/*
*
* NOTE: this CF controller ignores IOIS16, so we can't really do
* MAP_AUTOSZ. The 16bit mode allows single byte access on either
* D0-D7 (even addr) or D8-D15 (odd), so it's close enough for many
@ -169,13 +167,14 @@ static int at91_cf_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io)
* CF 3.0 spec table 35 also giving the D8-D15 option.
*/
if (!(io->flags & (MAP_16BIT | MAP_AUTOSZ))) {
csr |= AT91_SMC_DBW_8;
csr = AT91_MC_SMC_DBW_8;
dev_dbg(&cf->pdev->dev, "8bit i/o bus\n");
} else {
csr |= AT91_SMC_DBW_16;
csr = AT91_MC_SMC_DBW_16;
dev_dbg(&cf->pdev->dev, "16bit i/o bus\n");
}
at91_ramc_write(0, AT91_SMC_CSR(cf->board->chipselect), csr);
regmap_update_bits(mc, AT91_MC_SMC_CSR(cf->board->chipselect),
AT91_MC_SMC_DBW, csr);
io->start = cf->socket.io_offset;
io->stop = io->start + SZ_2K - 1;
@ -236,6 +235,10 @@ static int at91_cf_dt_init(struct platform_device *pdev)
pdev->dev.platform_data = board;
mc = syscon_regmap_lookup_by_compatible("atmel,at91rm9200-sdramc");
if (IS_ERR(mc))
return PTR_ERR(mc);
return 0;
}
#else