| Message ID | 20201208071928.2078-1-huangshuosheng@allwinnertech.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v4,1/6] cpufreq: sun50i: add efuse_xlate to get efuse version. | expand |
Please use --thread=shallow while creating the patches, I use the following options normally, so they appear as a thread. git format-patch -C -M --thread=shallow
Hi, On Tue, Dec 08, 2020 at 03:19:28PM +0800, Shuosheng Huang wrote: > It's better to use efuse_xlate to extract the differentiated part > regarding different SoC. > > Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com> Please wait a bit for reviews before sending a new version. You've sent three versions in a day, and I haven't reviewed the first one. Also, please put a changelog in the cover letter, we don't have any way to tell what is the difference between v1, v2, v3 and v4. > --- > drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++---------- > 1 file changed, 51 insertions(+), 31 deletions(-) > > diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c > index 9907a165135b..3c0531938d1a 100644 > --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c > +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c > @@ -19,24 +19,51 @@ > > #define MAX_NAME_LEN 7 > > -#define NVMEM_MASK 0x7 > -#define NVMEM_SHIFT 5 > +#define SUN50I_H6_NVMEM_MASK 0x7 > +#define SUN50I_H6_NVMEM_SHIFT 5 > + > +struct sunxi_cpufreq_soc_data { > + int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem); > +}; > > static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev; > > +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem) > +{ > + size_t len; > + u32 *speedbin; > + u32 efuse_value; > + > + speedbin = nvmem_cell_read(speedbin_nvmem, &len); > + if (IS_ERR(speedbin)) > + return PTR_ERR(speedbin); > + > + efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) & > + SUN50I_H6_NVMEM_MASK; > + kfree(speedbin); > + /* > + * We treat unexpected efuse values as if the SoC was from > + * the slowest bin. Expected efuse values are 1-3, slowest > + * to fastest. > + */ > + if (efuse_value >= 1 && efuse_value <= 3) > + return efuse_value - 1; > + else > + return 0; > +} > + > /** > * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value > - * @versions: Set to the value parsed from efuse > + * @soc_data: pointer to sunxi_cpufreq_soc_data context > * > * Returns 0 if success. > */ > -static int sun50i_cpufreq_get_efuse(u32 *versions) > +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data) > { > struct nvmem_cell *speedbin_nvmem; > struct device_node *np; > struct device *cpu_dev; > - u32 *speedbin, efuse_value; > - size_t len; > + int versions; > int ret; > > cpu_dev = get_cpu_device(0); > @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions) > return PTR_ERR(speedbin_nvmem); > } > > - speedbin = nvmem_cell_read(speedbin_nvmem, &len); > + versions = soc_data->efuse_xlate(speedbin_nvmem); > nvmem_cell_put(speedbin_nvmem); > - if (IS_ERR(speedbin)) > - return PTR_ERR(speedbin); > - > - efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK; > - > - /* > - * We treat unexpected efuse values as if the SoC was from > - * the slowest bin. Expected efuse values are 1-3, slowest > - * to fastest. > - */ > - if (efuse_value >= 1 && efuse_value <= 3) > - *versions = efuse_value - 1; > - else > - *versions = 0; > > - kfree(speedbin); > - return 0; > + return versions; > }; > > static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev) > { > + const struct of_device_id *match; > struct opp_table **opp_tables; > char name[MAX_NAME_LEN]; > unsigned int cpu; > - u32 speed = 0; > + int speed = 0; > int ret; > > + match = dev_get_platdata(&pdev->dev); > + if (!match) > + return -EINVAL; > + > opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), > GFP_KERNEL); > if (!opp_tables) > return -ENOMEM; > > - ret = sun50i_cpufreq_get_efuse(&speed); > - if (ret) > - return ret; > + speed = sun50i_cpufreq_get_efuse(match->data); > + if (speed < 0) > + return speed; > > snprintf(name, MAX_NAME_LEN, "speed%d", speed); > > @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = { > }, > }; > > +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = { > + .efuse_xlate = sun50i_h6_efuse_xlate, > +}; > + > static const struct of_device_id sun50i_cpufreq_match_list[] = { > - { .compatible = "allwinner,sun50i-h6" }, > + { .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data }, > {} > }; > > @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void) > if (unlikely(ret < 0)) > return ret; > > - sun50i_cpufreq_pdev = > - platform_device_register_simple("sun50i-cpufreq-nvmem", > - -1, NULL, 0); > + sun50i_cpufreq_pdev = platform_device_register_data(NULL, > + "sun50i-cpufreq-nvmem", -1, match, sizeof(*match)); The alignment here raises a checkpatch warning with --strict Maxime
On 12/8/20 1:19 AM, Shuosheng Huang wrote: > It's better to use efuse_xlate to extract the differentiated part > regarding different SoC. > > Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com> > --- > drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++---------- > 1 file changed, 51 insertions(+), 31 deletions(-) > > diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c > index 9907a165135b..3c0531938d1a 100644 > --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c > +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c > @@ -19,24 +19,51 @@ > > #define MAX_NAME_LEN 7 > > -#define NVMEM_MASK 0x7 > -#define NVMEM_SHIFT 5 > +#define SUN50I_H6_NVMEM_MASK 0x7 > +#define SUN50I_H6_NVMEM_SHIFT 5 > + > +struct sunxi_cpufreq_soc_data { > + int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem); > +}; > > static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev; > > +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem) > +{ > + size_t len; > + u32 *speedbin; > + u32 efuse_value; > + > + speedbin = nvmem_cell_read(speedbin_nvmem, &len); > + if (IS_ERR(speedbin)) > + return PTR_ERR(speedbin); > + > + efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) & > + SUN50I_H6_NVMEM_MASK; This does not need a cast. speedbin is already a pointer to u32. With the cast removed: Reviewed-by: Samuel Holland <samuel@sholland.org> Tested-by: Samuel Holland <samuel@sholland.org> # H6 > + kfree(speedbin); > + /* > + * We treat unexpected efuse values as if the SoC was from > + * the slowest bin. Expected efuse values are 1-3, slowest > + * to fastest. > + */ > + if (efuse_value >= 1 && efuse_value <= 3) > + return efuse_value - 1; > + else > + return 0; > +} > + > /** > * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value > - * @versions: Set to the value parsed from efuse > + * @soc_data: pointer to sunxi_cpufreq_soc_data context > * > * Returns 0 if success. > */ > -static int sun50i_cpufreq_get_efuse(u32 *versions) > +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data) > { > struct nvmem_cell *speedbin_nvmem; > struct device_node *np; > struct device *cpu_dev; > - u32 *speedbin, efuse_value; > - size_t len; > + int versions; > int ret; > > cpu_dev = get_cpu_device(0); > @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions) > return PTR_ERR(speedbin_nvmem); > } > > - speedbin = nvmem_cell_read(speedbin_nvmem, &len); > + versions = soc_data->efuse_xlate(speedbin_nvmem); > nvmem_cell_put(speedbin_nvmem); > - if (IS_ERR(speedbin)) > - return PTR_ERR(speedbin); > - > - efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK; > - > - /* > - * We treat unexpected efuse values as if the SoC was from > - * the slowest bin. Expected efuse values are 1-3, slowest > - * to fastest. > - */ > - if (efuse_value >= 1 && efuse_value <= 3) > - *versions = efuse_value - 1; > - else > - *versions = 0; > > - kfree(speedbin); > - return 0; > + return versions; > }; > > static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev) > { > + const struct of_device_id *match; > struct opp_table **opp_tables; > char name[MAX_NAME_LEN]; > unsigned int cpu; > - u32 speed = 0; > + int speed = 0; > int ret; > > + match = dev_get_platdata(&pdev->dev); > + if (!match) > + return -EINVAL; > + > opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), > GFP_KERNEL); > if (!opp_tables) > return -ENOMEM; > > - ret = sun50i_cpufreq_get_efuse(&speed); > - if (ret) > - return ret; > + speed = sun50i_cpufreq_get_efuse(match->data); > + if (speed < 0) > + return speed; > > snprintf(name, MAX_NAME_LEN, "speed%d", speed); > > @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = { > }, > }; > > +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = { > + .efuse_xlate = sun50i_h6_efuse_xlate, > +}; > + > static const struct of_device_id sun50i_cpufreq_match_list[] = { > - { .compatible = "allwinner,sun50i-h6" }, > + { .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data }, > {} > }; > > @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void) > if (unlikely(ret < 0)) > return ret; > > - sun50i_cpufreq_pdev = > - platform_device_register_simple("sun50i-cpufreq-nvmem", > - -1, NULL, 0); > + sun50i_cpufreq_pdev = platform_device_register_data(NULL, > + "sun50i-cpufreq-nvmem", -1, match, sizeof(*match)); > ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev); > if (ret == 0) > return 0; >
diff --git a/drivers/cpufreq/sun50i-cpufreq-nvmem.c b/drivers/cpufreq/sun50i-cpufreq-nvmem.c index 9907a165135b..3c0531938d1a 100644 --- a/drivers/cpufreq/sun50i-cpufreq-nvmem.c +++ b/drivers/cpufreq/sun50i-cpufreq-nvmem.c @@ -19,24 +19,51 @@ #define MAX_NAME_LEN 7 -#define NVMEM_MASK 0x7 -#define NVMEM_SHIFT 5 +#define SUN50I_H6_NVMEM_MASK 0x7 +#define SUN50I_H6_NVMEM_SHIFT 5 + +struct sunxi_cpufreq_soc_data { + int (*efuse_xlate)(struct nvmem_cell *speedbin_nvmem); +}; static struct platform_device *cpufreq_dt_pdev, *sun50i_cpufreq_pdev; +static int sun50i_h6_efuse_xlate(struct nvmem_cell *speedbin_nvmem) +{ + size_t len; + u32 *speedbin; + u32 efuse_value; + + speedbin = nvmem_cell_read(speedbin_nvmem, &len); + if (IS_ERR(speedbin)) + return PTR_ERR(speedbin); + + efuse_value = (*(u32 *)speedbin >> SUN50I_H6_NVMEM_SHIFT) & + SUN50I_H6_NVMEM_MASK; + kfree(speedbin); + /* + * We treat unexpected efuse values as if the SoC was from + * the slowest bin. Expected efuse values are 1-3, slowest + * to fastest. + */ + if (efuse_value >= 1 && efuse_value <= 3) + return efuse_value - 1; + else + return 0; +} + /** * sun50i_cpufreq_get_efuse() - Determine speed grade from efuse value - * @versions: Set to the value parsed from efuse + * @soc_data: pointer to sunxi_cpufreq_soc_data context * * Returns 0 if success. */ -static int sun50i_cpufreq_get_efuse(u32 *versions) +static int sun50i_cpufreq_get_efuse(const struct sunxi_cpufreq_soc_data *soc_data) { struct nvmem_cell *speedbin_nvmem; struct device_node *np; struct device *cpu_dev; - u32 *speedbin, efuse_value; - size_t len; + int versions; int ret; cpu_dev = get_cpu_device(0); @@ -63,43 +90,33 @@ static int sun50i_cpufreq_get_efuse(u32 *versions) return PTR_ERR(speedbin_nvmem); } - speedbin = nvmem_cell_read(speedbin_nvmem, &len); + versions = soc_data->efuse_xlate(speedbin_nvmem); nvmem_cell_put(speedbin_nvmem); - if (IS_ERR(speedbin)) - return PTR_ERR(speedbin); - - efuse_value = (*speedbin >> NVMEM_SHIFT) & NVMEM_MASK; - - /* - * We treat unexpected efuse values as if the SoC was from - * the slowest bin. Expected efuse values are 1-3, slowest - * to fastest. - */ - if (efuse_value >= 1 && efuse_value <= 3) - *versions = efuse_value - 1; - else - *versions = 0; - kfree(speedbin); - return 0; + return versions; }; static int sun50i_cpufreq_nvmem_probe(struct platform_device *pdev) { + const struct of_device_id *match; struct opp_table **opp_tables; char name[MAX_NAME_LEN]; unsigned int cpu; - u32 speed = 0; + int speed = 0; int ret; + match = dev_get_platdata(&pdev->dev); + if (!match) + return -EINVAL; + opp_tables = kcalloc(num_possible_cpus(), sizeof(*opp_tables), GFP_KERNEL); if (!opp_tables) return -ENOMEM; - ret = sun50i_cpufreq_get_efuse(&speed); - if (ret) - return ret; + speed = sun50i_cpufreq_get_efuse(match->data); + if (speed < 0) + return speed; snprintf(name, MAX_NAME_LEN, "speed%d", speed); @@ -163,8 +180,12 @@ static struct platform_driver sun50i_cpufreq_driver = { }, }; +static const struct sunxi_cpufreq_soc_data sun50i_h6_data = { + .efuse_xlate = sun50i_h6_efuse_xlate, +}; + static const struct of_device_id sun50i_cpufreq_match_list[] = { - { .compatible = "allwinner,sun50i-h6" }, + { .compatible = "allwinner,sun50i-h6", .data = &sun50i_h6_data }, {} }; @@ -198,9 +219,8 @@ static int __init sun50i_cpufreq_init(void) if (unlikely(ret < 0)) return ret; - sun50i_cpufreq_pdev = - platform_device_register_simple("sun50i-cpufreq-nvmem", - -1, NULL, 0); + sun50i_cpufreq_pdev = platform_device_register_data(NULL, + "sun50i-cpufreq-nvmem", -1, match, sizeof(*match)); ret = PTR_ERR_OR_ZERO(sun50i_cpufreq_pdev); if (ret == 0) return 0;
It's better to use efuse_xlate to extract the differentiated part regarding different SoC. Signed-off-by: Shuosheng Huang <huangshuosheng@allwinnertech.com> --- drivers/cpufreq/sun50i-cpufreq-nvmem.c | 82 ++++++++++++++++---------- 1 file changed, 51 insertions(+), 31 deletions(-)