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>

diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
index a65f821f52eb2ab882754cb16e9af9ae5b3ea06b..d3c378b4db6c5697d2daf903861b11b1bdd44ad5 100644 (file)
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -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".

diff --git a/drivers/pcmcia/at91_cf.c b/drivers/pcmcia/at91_cf.c
index e7775a41ae5d11f397012194e20daa1ebf05d9b9..87147bcd16553f74b2a54a7cb054c6847aecbdf7 100644 (file)
--- a/drivers/pcmcia/at91_cf.c
+++ b/drivers/pcmcia/at91_cf.c
@@ -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