On Thu, Aug 9, 2012 at 5:47 PM, Lee Jones lee.jones@linaro.org wrote:
In the initial submission of the MSP driver msp1 and msp3's associated pinctrl mechanism was passed back to platform code using a plat_init() call-back routine, but it has no place in platform code. The MSP driver should set this up for the appropriate ports. Instead we use a use_pinctrl identifier which is passed from platform_data/Device Tree which indicates which ports should use pinctrl.
CC: alsa-devel@alsa-project.org Signed-off-by: Lee Jones lee.jones@linaro.org
This is very good because it rids platform code and makes the driver self-contained without strange platform data hooks.
Now details...
+/* MSP1/3 Tx/Rx usage protection */ +static DEFINE_SPINLOCK(msp_rxtx_lock);
+/* Pin modes */ +struct pinctrl *pinctrl_p; +struct pinctrl_state *pinctrl_def; +struct pinctrl_state *pinctrl_sleep;
+/* Reference Count */ +int pinctrl_rxtx_ref;
But wait. These are just local statics. Surelty you can put these into struct ux500_msp instead? Here it looks like these will be used for all ports, so MSP2 will enable the pins requested by MSP1 etc completely broken. So put it into the struct ux500_msp state container from ux500_msp_i2s.h where it belongs.
Refer to drivers/tty/serial/amba-pl011.c when in trouble. This one is a good pinctrl example.
Yours, Linus Walleij