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author | Antonio Borneo <antonio.borneo@foss.st.com> | 2022-06-06 18:27:57 +0200 |
---|---|---|
committer | Marc Zyngier <maz@kernel.org> | 2022-07-07 09:07:44 +0100 |
commit | c297493336b7bc0c12ced484a9e61d04ec2d9403 (patch) | |
tree | 4d723d8e03a6d008df3fcf9d824a86420b9cbb05 | |
parent | ce4ef8f9f2abcf104a5417225cbfe3560e779093 (diff) | |
download | linux-stable-c297493336b7bc0c12ced484a9e61d04ec2d9403.tar.gz linux-stable-c297493336b7bc0c12ced484a9e61d04ec2d9403.tar.bz2 linux-stable-c297493336b7bc0c12ced484a9e61d04ec2d9403.zip |
irqchip/stm32-exti: Simplify irq description table
Having removed the event trigger type from struct stm32_desc_irq
makes worthless keep using a struct.
Replace the struct by a single dimension array and use 8 bit type
to reduce the overal memory footprint.
On armv7a this patch reduces by 7% the size of the driver, from
text data bss dec hex filename
6977 424 4 7405 1ced irq-stm32-exti.o
to
6449 424 4 6877 1add irq-stm32-exti.o
Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220606162757.415354-7-antonio.borneo@foss.st.com
-rw-r--r-- | drivers/irqchip/irq-stm32-exti.c | 220 |
1 files changed, 101 insertions, 119 deletions
diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c index 045589627e67..a73763d475f0 100644 --- a/drivers/irqchip/irq-stm32-exti.c +++ b/drivers/irqchip/irq-stm32-exti.c @@ -39,16 +39,10 @@ struct stm32_exti_bank { #define UNDEF_REG ~0 -struct stm32_desc_irq { - u32 exti; - u32 irq_parent; -}; - struct stm32_exti_drv_data { const struct stm32_exti_bank **exti_banks; - const struct stm32_desc_irq *desc_irqs; + const u8 *desc_irqs; u32 bank_nr; - u32 irq_nr; }; struct stm32_exti_chip_data { @@ -176,126 +170,114 @@ static const struct stm32_exti_bank *stm32mp1_exti_banks[] = { static struct irq_chip stm32_exti_h_chip; static struct irq_chip stm32_exti_h_chip_direct; -static const struct stm32_desc_irq stm32mp1_desc_irq[] = { - { .exti = 0, .irq_parent = 6 }, - { .exti = 1, .irq_parent = 7 }, - { .exti = 2, .irq_parent = 8 }, - { .exti = 3, .irq_parent = 9 }, - { .exti = 4, .irq_parent = 10 }, - { .exti = 5, .irq_parent = 23 }, - { .exti = 6, .irq_parent = 64 }, - { .exti = 7, .irq_parent = 65 }, - { .exti = 8, .irq_parent = 66 }, - { .exti = 9, .irq_parent = 67 }, - { .exti = 10, .irq_parent = 40 }, - { .exti = 11, .irq_parent = 42 }, - { .exti = 12, .irq_parent = 76 }, - { .exti = 13, .irq_parent = 77 }, - { .exti = 14, .irq_parent = 121 }, - { .exti = 15, .irq_parent = 127 }, - { .exti = 16, .irq_parent = 1 }, - { .exti = 19, .irq_parent = 3 }, - { .exti = 21, .irq_parent = 31 }, - { .exti = 22, .irq_parent = 33 }, - { .exti = 23, .irq_parent = 72 }, - { .exti = 24, .irq_parent = 95 }, - { .exti = 25, .irq_parent = 107 }, - { .exti = 26, .irq_parent = 37 }, - { .exti = 27, .irq_parent = 38 }, - { .exti = 28, .irq_parent = 39 }, - { .exti = 29, .irq_parent = 71 }, - { .exti = 30, .irq_parent = 52 }, - { .exti = 31, .irq_parent = 53 }, - { .exti = 32, .irq_parent = 82 }, - { .exti = 33, .irq_parent = 83 }, - { .exti = 47, .irq_parent = 93 }, - { .exti = 48, .irq_parent = 138 }, - { .exti = 50, .irq_parent = 139 }, - { .exti = 52, .irq_parent = 140 }, - { .exti = 53, .irq_parent = 141 }, - { .exti = 54, .irq_parent = 135 }, - { .exti = 61, .irq_parent = 100 }, - { .exti = 65, .irq_parent = 144 }, - { .exti = 68, .irq_parent = 143 }, - { .exti = 70, .irq_parent = 62 }, - { .exti = 73, .irq_parent = 129 }, +#define EXTI_INVALID_IRQ U8_MAX +#define STM32MP1_DESC_IRQ_SIZE (ARRAY_SIZE(stm32mp1_exti_banks) * IRQS_PER_BANK) + +static const u8 stm32mp1_desc_irq[] = { + /* default value */ + [0 ... (STM32MP1_DESC_IRQ_SIZE - 1)] = EXTI_INVALID_IRQ, + + [0] = 6, + [1] = 7, + [2] = 8, + [3] = 9, + [4] = 10, + [5] = 23, + [6] = 64, + [7] = 65, + [8] = 66, + [9] = 67, + [10] = 40, + [11] = 42, + [12] = 76, + [13] = 77, + [14] = 121, + [15] = 127, + [16] = 1, + [19] = 3, + [21] = 31, + [22] = 33, + [23] = 72, + [24] = 95, + [25] = 107, + [26] = 37, + [27] = 38, + [28] = 39, + [29] = 71, + [30] = 52, + [31] = 53, + [32] = 82, + [33] = 83, + [47] = 93, + [48] = 138, + [50] = 139, + [52] = 140, + [53] = 141, + [54] = 135, + [61] = 100, + [65] = 144, + [68] = 143, + [70] = 62, + [73] = 129, }; -static const struct stm32_desc_irq stm32mp13_desc_irq[] = { - { .exti = 0, .irq_parent = 6 }, - { .exti = 1, .irq_parent = 7 }, - { .exti = 2, .irq_parent = 8 }, - { .exti = 3, .irq_parent = 9 }, - { .exti = 4, .irq_parent = 10 }, - { .exti = 5, .irq_parent = 24 }, - { .exti = 6, .irq_parent = 65 }, - { .exti = 7, .irq_parent = 66 }, - { .exti = 8, .irq_parent = 67 }, - { .exti = 9, .irq_parent = 68 }, - { .exti = 10, .irq_parent = 41 }, - { .exti = 11, .irq_parent = 43 }, - { .exti = 12, .irq_parent = 77 }, - { .exti = 13, .irq_parent = 78 }, - { .exti = 14, .irq_parent = 106 }, - { .exti = 15, .irq_parent = 109 }, - { .exti = 16, .irq_parent = 1 }, - { .exti = 19, .irq_parent = 3 }, - { .exti = 21, .irq_parent = 32 }, - { .exti = 22, .irq_parent = 34 }, - { .exti = 23, .irq_parent = 73 }, - { .exti = 24, .irq_parent = 93 }, - { .exti = 25, .irq_parent = 114 }, - { .exti = 26, .irq_parent = 38 }, - { .exti = 27, .irq_parent = 39 }, - { .exti = 28, .irq_parent = 40 }, - { .exti = 29, .irq_parent = 72 }, - { .exti = 30, .irq_parent = 53 }, - { .exti = 31, .irq_parent = 54 }, - { .exti = 32, .irq_parent = 83 }, - { .exti = 33, .irq_parent = 84 }, - { .exti = 44, .irq_parent = 96 }, - { .exti = 47, .irq_parent = 92 }, - { .exti = 48, .irq_parent = 116 }, - { .exti = 50, .irq_parent = 117 }, - { .exti = 52, .irq_parent = 118 }, - { .exti = 53, .irq_parent = 119 }, - { .exti = 68, .irq_parent = 63 }, - { .exti = 70, .irq_parent = 98 }, +static const u8 stm32mp13_desc_irq[] = { + /* default value */ + [0 ... (STM32MP1_DESC_IRQ_SIZE - 1)] = EXTI_INVALID_IRQ, + + [0] = 6, + [1] = 7, + [2] = 8, + [3] = 9, + [4] = 10, + [5] = 24, + [6] = 65, + [7] = 66, + [8] = 67, + [9] = 68, + [10] = 41, + [11] = 43, + [12] = 77, + [13] = 78, + [14] = 106, + [15] = 109, + [16] = 1, + [19] = 3, + [21] = 32, + [22] = 34, + [23] = 73, + [24] = 93, + [25] = 114, + [26] = 38, + [27] = 39, + [28] = 40, + [29] = 72, + [30] = 53, + [31] = 54, + [32] = 83, + [33] = 84, + [44] = 96, + [47] = 92, + [48] = 116, + [50] = 117, + [52] = 118, + [53] = 119, + [68] = 63, + [70] = 98, }; static const struct stm32_exti_drv_data stm32mp1_drv_data = { .exti_banks = stm32mp1_exti_banks, .bank_nr = ARRAY_SIZE(stm32mp1_exti_banks), .desc_irqs = stm32mp1_desc_irq, - .irq_nr = ARRAY_SIZE(stm32mp1_desc_irq), }; static const struct stm32_exti_drv_data stm32mp13_drv_data = { .exti_banks = stm32mp1_exti_banks, .bank_nr = ARRAY_SIZE(stm32mp1_exti_banks), .desc_irqs = stm32mp13_desc_irq, - .irq_nr = ARRAY_SIZE(stm32mp13_desc_irq), }; -static const struct -stm32_desc_irq *stm32_exti_get_desc(const struct stm32_exti_drv_data *drv_data, - irq_hw_number_t hwirq) -{ - const struct stm32_desc_irq *desc = NULL; - int i; - - if (!drv_data->desc_irqs) - return NULL; - - for (i = 0; i < drv_data->irq_nr; i++) { - desc = &drv_data->desc_irqs[i]; - if (desc->exti == hwirq) - break; - } - - return desc; -} - static unsigned long stm32_exti_pending(struct irq_chip_generic *gc) { struct stm32_exti_chip_data *chip_data = gc->private; @@ -713,7 +695,7 @@ static int stm32_exti_h_domain_alloc(struct irq_domain *dm, { struct stm32_exti_host_data *host_data = dm->host_data; struct stm32_exti_chip_data *chip_data; - const struct stm32_desc_irq *desc; + u8 desc_irq; struct irq_fwspec *fwspec = data; struct irq_fwspec p_fwspec; irq_hw_number_t hwirq; @@ -728,21 +710,21 @@ static int stm32_exti_h_domain_alloc(struct irq_domain *dm, bank = hwirq / IRQS_PER_BANK; chip_data = &host_data->chips_data[bank]; - - desc = stm32_exti_get_desc(host_data->drv_data, hwirq); - if (!desc) - return -EINVAL; - event_trg = readl_relaxed(host_data->base + chip_data->reg_bank->trg_ofst); chip = (event_trg & BIT(hwirq % IRQS_PER_BANK)) ? &stm32_exti_h_chip : &stm32_exti_h_chip_direct; irq_domain_set_hwirq_and_chip(dm, virq, hwirq, chip, chip_data); - if (desc->irq_parent) { + + if (!host_data->drv_data || !host_data->drv_data->desc_irqs) + return -EINVAL; + + desc_irq = host_data->drv_data->desc_irqs[hwirq]; + if (desc_irq != EXTI_INVALID_IRQ) { p_fwspec.fwnode = dm->parent->fwnode; p_fwspec.param_count = 3; p_fwspec.param[0] = GIC_SPI; - p_fwspec.param[1] = desc->irq_parent; + p_fwspec.param[1] = desc_irq; p_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH; return irq_domain_alloc_irqs_parent(dm, virq, 1, &p_fwspec); |