Hi, On Fri, Feb 05, 2010 at 02:42:48PM +0100, Anatolij Gustschin wrote: > Add reset module registers representation and > machine restart callback for mpc5121 platform. >
Two comments:
> Signed-off-by: Piotr Ziecik <ko...@semihalf.com>
> Signed-off-by: Wolfgang Denk <w...@denx.de>
> Signed-off-by: Anatolij Gustschin <ag...@denx.de>
> Cc: Grant Likely <grant.lik...@secretlab.ca>
> Cc: John Rigby <jcri...@gmail.com>
> ---
> Changes since v2:
> - call mpc512x_restart_init() explicitely from platform
> init code
>
> Changes since v1:
> - use 'struct mpc512x_reset_module *' type for 'reset_module_base'
> - remove empty line
> - remove leftover colon and use pr_err() instead of printk.
>
> arch/powerpc/include/asm/mpc5xxx.h | 14 +++++++++-
> arch/powerpc/platforms/512x/mpc5121_ads.c | 1 +
> arch/powerpc/platforms/512x/mpc5121_generic.c | 1 +
> arch/powerpc/platforms/512x/mpc512x.h | 1 +
> arch/powerpc/platforms/512x/mpc512x_shared.c | 34
> +++++++++++++++++++++++++
> 5 files changed, 50 insertions(+), 1 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/mpc5xxx.h
> b/arch/powerpc/include/asm/mpc5xxx.h
> index 5ce9c5f..0004986 100644
> --- a/arch/powerpc/include/asm/mpc5xxx.h
> +++ b/arch/powerpc/include/asm/mpc5xxx.h
> @@ -18,5 +18,17 @@
>
> extern unsigned long mpc5xxx_get_bus_frequency(struct device_node *node);
>
> -#endif /* __ASM_POWERPC_MPC5xxx_H__ */
> +/* MPC512x Reset module registers */
> +struct mpc512x_reset_module {
> + u32 rcwlr; /* Reset Configuration Word Low Register */
> + u32 rcwhr; /* Reset Configuration Word High Register */
> + u32 reserved1;
> + u32 reserved2;
> + u32 rsr; /* Reset Status Register */
> + u32 rmr; /* Reset Mode Register */
> + u32 rpr; /* Reset Protection Register */
> + u32 rcr; /* Reset Control Register */
> + u32 rcer; /* Reset Control Enable Register */
> +};
>
> +#endif /* __ASM_POWERPC_MPC5xxx_H__ */
> diff --git a/arch/powerpc/platforms/512x/mpc5121_ads.c
> b/arch/powerpc/platforms/512x/mpc5121_ads.c
> index 0f8f2e9..ee6ae12 100644
> --- a/arch/powerpc/platforms/512x/mpc5121_ads.c
> +++ b/arch/powerpc/platforms/512x/mpc5121_ads.c
> @@ -68,4 +68,5 @@ define_machine(mpc5121_ads) {
> .init_IRQ = mpc5121_ads_init_IRQ,
> .get_irq = ipic_get_irq,
> .calibrate_decr = generic_calibrate_decr,
> + .restart = mpc512x_restart,
> };
> diff --git a/arch/powerpc/platforms/512x/mpc5121_generic.c
> b/arch/powerpc/platforms/512x/mpc5121_generic.c
> index 9b8c9b0..a6c0e3a 100644
> --- a/arch/powerpc/platforms/512x/mpc5121_generic.c
> +++ b/arch/powerpc/platforms/512x/mpc5121_generic.c
> @@ -55,4 +55,5 @@ define_machine(mpc5121_generic) {
> .init_IRQ = mpc512x_init_IRQ,
> .get_irq = ipic_get_irq,
> .calibrate_decr = generic_calibrate_decr,
> + .restart = mpc512x_restart,
> };
> diff --git a/arch/powerpc/platforms/512x/mpc512x.h
> b/arch/powerpc/platforms/512x/mpc512x.h
> index ac3da1a..b2daca0 100644
> --- a/arch/powerpc/platforms/512x/mpc512x.h
> +++ b/arch/powerpc/platforms/512x/mpc512x.h
> @@ -15,4 +15,5 @@ extern void __init mpc512x_init_IRQ(void);
> extern void __init mpc512x_init(void);
> extern int __init mpc5121_clk_init(void);
> void __init mpc512x_declare_of_platform_devices(void);
> +extern void mpc512x_restart(char *cmd);
> #endif /* __MPC512X_H__ */
> diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c
> b/arch/powerpc/platforms/512x/mpc512x_shared.c
> index b683165..ac0400e 100644
> --- a/arch/powerpc/platforms/512x/mpc512x_shared.c
> +++ b/arch/powerpc/platforms/512x/mpc512x_shared.c
> @@ -21,9 +21,42 @@
> #include <asm/ipic.h>
> #include <asm/prom.h>
> #include <asm/time.h>
> +#include <asm/mpc5xxx.h>
>
> #include "mpc512x.h"
>
> +static struct mpc512x_reset_module __iomem *reset_module_base;
> +
> +static int __init mpc512x_restart_init(void)
> +{
> + struct device_node *np;
> +
> + np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-reset");
> + if (!np)
> + return -1;
> +
> + reset_module_base = of_iomap(np, 0);
> + of_node_put(np);
> +
> + return 0;
> +}
> +
> +void mpc512x_restart(char *cmd)
> +{
> + struct mpc512x_reset_module *rm = reset_module_base;
Why not using reset_module_base directly?
> +
> + if (rm) {
> + /* Enable software reset "RSTE" */
> + out_be32(&rm->rpr, 0x52535445);
> + /* Set software hard reset */
> + out_be32(&rm->rcr, 0x2);
> + } else {
> + pr_err("Restart module not mapped.\n");
> + }
> + for (;;)
> + ;
> +}
> +
> void __init mpc512x_init_IRQ(void)
> {
> struct device_node *np;
> @@ -62,4 +95,5 @@ void __init mpc512x_init(void)
> {
> mpc512x_declare_of_platform_devices();
> mpc5121_clk_init();
> + mpc512x_restart_init();
If the return value is not checked here, you could as well make the function
void. (Not much one could do in the error-case, too.)
> }
> --
Regards,
Wolfram
--
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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