Hi Peng,
On 10 March 2016 at 01:57, Peng Fan van.freenix@gmail.com wrote:
Support Driver Model for fsl esdhc driver.
In order to minimize the change, reuse the fsl_esdhc_initialize function. This new way is to fill an fsl_esdhc_cfg struture and pass it to fsl_esdhc_initialize, just like the code in different board codes.
Introduce a 'struct mmc *mmc' entry in fsl_esdhc_cfg structure, otherwise fsl_esdhc_initialize may need to be restructured which will cause lots changes for board code.
Since clk driver is not implemented, use mxc_get_clock here to fill cfg->sdhc_clk. Anyway we can utilize the pinctrl imx driver now, except the SPL part, we can drop the pinmux settings from board file for mmc.
There are so many "ifdef" in the file, maybe we can use driver data or quirks to cover these. But to minimize changes for this patch, these are not included. Later we can try to discard the nasty ifdef.
Has been tested on i.MX6UL 9x9 EVK board: " =>dm tree .... simple_bus [ + ] | `-- aips-bus@02100000 mmc [ + ] | |-- usdhc@02190000 mmc [ + ] | |-- usdhc@02194000 .... => mmc list FSL_SDHC: 0 (SD) FSL_SDHC: 1 (SD) "
Signed-off-by: Peng Fan van.freenix@gmail.com Cc: York Sun york.sun@nxp.com Cc: Yangbo Lu yangbo.lu@nxp.com Cc: Hector Palacios hector.palacios@digi.com Cc: Eric Nelson eric@nelint.com Cc: Stefano Babic sbabic@denx.de Cc: Fabio Estevam fabio.estevam@nxp.com Cc: Pantelis Antoniou panto@antoniou-consulting.com Cc: Simon Glass sjg@chromium.org
drivers/mmc/fsl_esdhc.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++ include/fsl_esdhc.h | 1 + 2 files changed, 82 insertions(+)
I'm nervous about this patch. It is calling board code from a driver, which we should avoid.
Perhaps it would be better to start by refactoring things to fix the problems you mention, and then come back to this patch? I'm worried we'll end up with a driver model conversion that never gets properly finished if we do things in the wrong order.
Regards, Simon