diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2019-09-18 17:42:52 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2022-05-07 22:55:49 +0200 |
| commit | fd13f8117f7a2d4054bf420ec1428e918a24a480 (patch) | |
| tree | 99c55a437057e8277373a261f769577c6b27cbe3 /arch/arm/mach-pxa/pxa2xx.c | |
| parent | 5c6603e741921c75f67a724e798642ed50a6328e (diff) | |
| download | linux-fd13f8117f7a2d4054bf420ec1428e918a24a480.tar.bz2 | |
ARM: pxa: move smemc register access from clk to platform
The get_sdram_rows() and get_memclkdiv() helpers need smemc
register that are separate from the clk registers, move
them out of the clk driver, and use an extern declaration
instead.
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: linux-clk@vger.kernel.org
Link: https://lore.kernel.org/lkml/87pnielzo4.fsf@belgarion.home/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-pxa/pxa2xx.c')
| -rw-r--r-- | arch/arm/mach-pxa/pxa2xx.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/pxa2xx.c b/arch/arm/mach-pxa/pxa2xx.c index ac72acb43e26..e06699fd8a5d 100644 --- a/arch/arm/mach-pxa/pxa2xx.c +++ b/arch/arm/mach-pxa/pxa2xx.c @@ -14,7 +14,10 @@ #include <mach/pxa2xx-regs.h> #include "mfp-pxa25x.h" +#include "generic.h" #include <mach/reset.h> +#include <mach/smemc.h> +#include <linux/soc/pxa/smemc.h> #include <linux/platform_data/irda-pxaficp.h> void pxa2xx_clear_reset_status(unsigned int mask) @@ -50,3 +53,27 @@ void pxa2xx_transceiver_mode(struct device *dev, int mode) BUG(); } EXPORT_SYMBOL_GPL(pxa2xx_transceiver_mode); + +#define MDCNFG_DRAC2(mdcnfg) (((mdcnfg) >> 21) & 0x3) +#define MDCNFG_DRAC0(mdcnfg) (((mdcnfg) >> 5) & 0x3) + +int pxa2xx_smemc_get_sdram_rows(void) +{ + static int sdram_rows; + unsigned int drac2 = 0, drac0 = 0; + u32 mdcnfg; + + if (sdram_rows) + return sdram_rows; + + mdcnfg = readl_relaxed(MDCNFG); + + if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3)) + drac2 = MDCNFG_DRAC2(mdcnfg); + + if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1)) + drac0 = MDCNFG_DRAC0(mdcnfg); + + sdram_rows = 1 << (11 + max(drac0, drac2)); + return sdram_rows; +} |