[U-Boot] [PATCH 14/18] mmc: Limit the number of used SSP ports on MX23

[Marek Vasut]

The MX23 can only use two SSP ports.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Andy Fleming <afleming at freescale.com>
Cc: Fabio Estevam <fabio.estevam at freescale.com>
Cc: Otavio Salvador <otavio at ossystems.com.br>
Cc: Stefano Babic <sbabic at denx.de>
---
 drivers/mmc/mxsmmc.c |   12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/mxsmmc.c b/drivers/mmc/mxsmmc.c
index 76878d0..0c4cd54 100644
--- a/drivers/mmc/mxsmmc.c
+++ b/drivers/mmc/mxsmmc.c
@@ -356,6 +356,16 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
 	struct mmc *mmc = NULL;
 	struct mxsmmc_priv *priv = NULL;
 	int ret;
+#if defined(CONFIG_MX23)
+	const unsigned int mxsmmc_max_id = 2;
+	const unsigned int mxsmmc_clk_id = 0;
+#elif defined(CONFIG_MX28)
+	const unsigned int mxsmmc_max_id = 4;
+	const unsigned int mxsmmc_clk_id = id;
+#endif
+
+	if (id >= mxsmmc_max_id)
+		return -ENODEV;
 
 	mmc = malloc(sizeof(struct mmc));
 	if (!mmc)
@@ -401,7 +411,7 @@ int mxsmmc_initialize(bd_t *bis, int id, int (*wp)(int))
 	 * CLOCK_RATE could be any integer from 0 to 255.
 	 */
 	mmc->f_min = 400000;
-	mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + id) * 1000 / 2;
+	mmc->f_max = mxc_get_clock(MXC_SSP0_CLK + mxsmmc_clk_id) * 1000 / 2;
 	mmc->b_max = 0x20;
 
 	mmc_register(mmc);
-- 
1.7.10.4