ARM: imx25-pinfunc: document SION being important for MX25_PAD_SD1_CMD__SD1_CMD
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
parent
6f0808c482
commit
da4fa6fa80
|
@ -421,6 +421,15 @@
|
|||
#define MX25_PAD_UART2_CTS__FEC_RX_ERR 0x18c 0x384 0x518 0x12 0x002
|
||||
#define MX25_PAD_UART2_CTS__GPIO_4_29 0x18c 0x384 0x000 0x15 0x000
|
||||
|
||||
/*
|
||||
* Removing the SION bit from MX25_PAD_SD1_CMD__SD1_CMD breaks detecting an SD
|
||||
* card. According to the i.MX25 reference manual (e.g. Figure 23-2 in IMX25RM
|
||||
* Rev. 2 from 01/2011) this pin is bidirectional. So it seems to be a silicon
|
||||
* bug that configuring the SD1_CMD function doesn't enable the input path for
|
||||
* this pin.
|
||||
* This might have side effects for other hardware units that are connected to
|
||||
* that pin and use the respective function as input.
|
||||
*/
|
||||
#define MX25_PAD_SD1_CMD__SD1_CMD 0x190 0x388 0x000 0x10 0x000
|
||||
#define MX25_PAD_SD1_CMD__CSPI2_MOSI 0x190 0x388 0x4a0 0x11 0x001
|
||||
#define MX25_PAD_SD1_CMD__FEC_RDATA2 0x190 0x388 0x50c 0x12 0x002
|
||||
|
|
Loading…
Reference in a new issue